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2. 335 SE 99 9 6l oc vc AINO 00 009 00 ev SHOSS3HdWO Q31V3S 45 E 29555559 AINO JAG 390 WOLLOS INS 009 OS 222 8 18 8 ON31ON 335 D KINO WV 009 CH uw z Lava Eg ASE A IDAS Svo NMOHS OS V WOLLOS L ON310N 33S ON 31ON 335 6 ON 31ON 335 GON 3LON 335 06 e 58 58114 INDYOL ANY 1 201 8 43 02 5871401 13 58114 SE OL INDYOL 9 H3ONTIS YIHSYM 30 SADV4 9 SGVIYHL 5 OL 31119201 144 009 Obl OLINDYOL 5 01 5 009 58114 0 9 OL 009 58114 007 01 7901 LV GATIVISNI 38 15011 95 SWIL KINO SLINN dWnd 5 9 31V TdQV3H OL 5 TIY NO LNVIVaS 360172 100 NIHLIM 14 5 3409 1V3S 1 OL 38 01 83AO2 1 10 30 For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 UNIVERSAL RAI SERIES
3. GING Sina 098 16 OVE GEC c9 912 Lv 9ST CEC SL Dresser Inc D 2a 254188 zb 0 O 551592 5 rogo yr x 5 9 5 2 5 5 2 FF F SLY 5 5890200 OS2anh 2 53588 9 9S gt co 2 o 8 9 s 2 509007 0 FANT 2 848885 oor DZI ONIA LE o 5 o a 8 9 ER hL 09 ROOTS and Universal RAI are trademarks of Dresser Inc All information subject to change without notice UNIVERSAL 8 SERIES BLOWERS EXHAUSTER US 3 00 Canada 4 50 CONTENTS INFORMATION SUMMARY 1 TROUBLESHOOTING 9 SAFETY PRECAUTIONS 2 MAINTENANCE REPLACEMENTS ror 2 UNIVERSAL RAI SERIES BLOWERS 10 Penna SERIES BLOWERS seeds 14 INSTALLATION 3 FIGURES LT EAE 18 LUBRICATION 29 OPERATION 7 ASSEMBLY DRAWINGS 26 OPERATING CHARACTERISTICS 8 PARTS o
4. 26 31841335 2 LON OO 335 1 LZ Ig lt ASA 8 ON PHY 21 t FHL NO 411201 ISN 30 3215110 H3HSVM ISN 1481 061 1491 OLL Z L 7118109 2 1 OL GANOYOLIGOLLAN S L NO x LE NO 205 Q O3H 9 2 1 0 2 NOILINYLSNI NOLLVOIH8011 081 IWANVW ONILWYAdO 335 8 A18W3SSV 02 WALI TIVLSNI V SALON Im 3WVN 1894 For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 9 SH34018 IWSHAAINN 40 A18 3ssy 4 2026 79 P avaavan verve mace ab ed 51008 ET zi waa v i ES 2 LSEEERES 23 SIvauHL NO 311207 ISN 3538 SZ wal gt SOON HUM NOLLONIYNO2 NI
5. SALON MIA ZI 28 For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 9 9 SH3MO18 SVD 531035 TVSH3AINR 40 Alawassy XL NOLSNOH pem SEM ECOOLLOEL SN 990 NOISN3WId v viso 2204 51008 8 Sours 22 a EET TA vas ES O SS2NISNBNOISAIDSIOOY NoLONnrmeo NI 21 0538 ONV mE SH3MO18 SVO 9 304 So RUNS N GEAR 14781 00 9 A18W3SSV TVNOILO3S 01 38 OL LAN 2026 09 d3H LI 15 NOLLVOIHS TT 081 931 IWANVW DNILVH3dO 33S 8 SANIOF YAGNITAD 31V Td QV3H N33A4138 61506 2 3 114201 351 V SALON 335 m Im SAWN VE Ed 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc
6. 9 EOL OLT 182 VS 681 X 009 95 46 91 1 8 8IL 08 04 L S OS AT e 2 02 941 082 LT 12 01 vc TE 80 65 9 86 76 8 78 02117 SS 61 87 a OVE 02 a 009 L 8 6 97 18 99 t8 109 8 Er amp S6 p VOL 9T 84 0082 8I 0 81 91 Tc 90 70 0 85 6 99 952 67 e 6T JOST CT 9 86 8 18 amp 182 98 E 68 a 66 ET 1 6 80 009 vc 90 c 19 6018 180 90 VO 190 T amp 6t Sv ZS TE LT W 199 6 9 9 0 CT amp 180 9 E 5 Te 8C 81 8 9 6 JET TT r4 80 A 90 amp vo 60 0 01 Es rre pu oc peu bu peu jus e je pem pu rr S je a e ue oor ue p ue e uem ee ee uec me p oem oe eee em 1 tats 88888 888 g PE RA 188 8 SS SSNS SIS 589 RRB 8 8 lt tel STS 2 12 11211 yas gins SAMSON e NjA eid
7. Belt Pull 1 8 2 Dimension Max Allowable Frame Standard Bottom Drive or Shaft Load Size Unit Double Shaft Seal Ib in 404 406 409 412 418 616 624 NOTE Arc of sheave belt contact on the smaller sheave not to be less than 170 Driver to be installed on the inlet side for vertical units and on the drive shaft side for horizontal units For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 18 FIGURE 3 AiR BLOWER INSTALLATION WITH ACCESSORIES Manual Discharge Unloading Valve Back Pressure Regulator optional Inlet Air Pressure Relief Valve Check Valve d Vacuum Relief Valve ES dt Temperature Gauge 7 Manometers Isolation Valve Inlet with Limit Switch Silencer Temperature Gauge Discharge Silencer Temporary Screen Expansion Joint Differential Pressure 8 Temperature Switches Expansion Joint with Control Unit Above are suggested locations for available accessories Gas BLOWER INSTALLATION WITH ACCESSORIES Back Pressure By Pass Cooler Regulator Normal Starting Valve Pressure Relief Valve Inlet Silencer Pressure Vacuum Relief Temperature Valve Discharge Silencer Temporary Screen Temporary Starting Valve GAS BLOWER Expansion Joint Differrential Pressure amp Expansion Joint with Control Unit Temperature Switches Above are suggested locations for available
8. 29 SVD 531935 ATaWassy ANO SHOSS3HdWOD 32 35 SVD 304 n 2018818 m no na sion aasvau MK n 3 pem EHI monens P poc O a 55385508 51008 NI Niran aa 18 1155 1VNOLD3S LETOO SH gt vuoto 910195 RN SSE Se USES IS DEPT FA WVW FD WVHW C WNVH ic eee 9 ON 31ON 335 VEC 009 2 GO 1 ON3ION 335 i 5 o 335 S ON 335 139 98 3i0N33s 009 ee ALON 335 00b P o 50 M 310N 335 9
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10. CAMCORP PRESSURE VACUUM BLOWER PACKAGE INSTRUCTION OPERATIONS amp MAINTENANCE MANUAL Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com TABLE OF CONTENTS General Information 2 Principle of Operation 2 Installation 4 5 6 Maintenance 7 Troubleshooting 8 NOTE It is the owner s responsibility to maintain the safety features included with this equipment The safety features may include but not necessarily be limited to guards access doors and covers explosion vents warning decals caution decals and advisory decals Replacement features are available from CAMCORP Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com GENERAL COMMENTS CAMCORP supplies air pump packages comprised of positive displacement blowers manufactured by various companies A Service Manual for your specific blower is included as an inset in this manual For specific maintenance and lubrication information please refer to this insert READ amp UNDERSTAND SAFETY DECALS Installation and Operation Cautions Be sure that the motor is wire
11. 12 02 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc website www rootsblower com email ROOTS dresser com Installation amp Maintenance Instructions ASCA TRIVPOINI SWITCH UNITS PC SERIES TWO STAGE FIXED DEADBAND SWITCH UNITS OPEN FRAME TYPE GENERAL PURPOSE OR WATERTIGHT SWITCH ENCLOSURE DESCRIPTION The PC Series Two Stage Fixed Deadband Switch Units are used with transducer units to make Tripoint Pressure Switches or Temperature Switches The switch units are made of aluminum alloy and designed for rugged use The switch unit may be provided as frame type or with a general purpose or watertight enclosure All wiring terminals adjustments and visual scales are accessible from the front of the switch The switch may be supplied as a complete unit with the switch unit and transducer unit completely assembled The components may be separate units to be assembled upon installation The two stage switch unit has two adjusting nuts which provide independent adjustment of the two electrical switches Each switch has an adjustable set point and non adjustable reset point The difference between the set point and the reset point is the fixed deadband The actuation points of the electrical switches cannot be identical but require a minimum separation The switch assembly can
12. In Position 1 it is delivering a known volume B to the discharge while space A between the lower impeller and cylinder wall is being filled Counterclockwise rotation of this impeller then traps equal volume A in Position 2 and further rotation delivers it to the discharge in Position 3 One complete revolution of the driving shaft alternately traps four fixed and equal volumes of air two by each impeller and pushes them through to the discharge The volume capacity of a lobe blower operating at a constant speed therefore remains relatively independ ent of reasonable inlet of discharge pressure variations To change capacity it is necessary either to change speed of rotation or blow off some of the discharge air No attempt should ever be made to control capacity by means of a throttle valve in the intake or discharge piping This will not only increase the power load on the driver but can also overload and seriously damage the blower If a possibility does exist that flow to the blower inlet may be cut off during normal operation of a process then an adequate vacuum relief valve must be installed near the blower A pressure type relief valve in the discharge line near the blower is required for protection against cut off or blocking in this line Refer to FIGURE 3 for a complete piping schematic When a belt drive is installed blower speed can usually be adjusted to obtain desired capacity by changing the diameter of one or b
13. On general purpose or raintight constructions remove switch cover 2 Remove instruction label and pressure or temperature switch range scale from the transducer unit 3 Place transducer unit on base of switch unit and assemble Start bolts 4 approximately two turns by hand to avoid the possibility of cross threading After initial engagement torque bolts 4 in a crisscross manner to 80x10 in lbs 9 0 1 1 Nm 4 Remove backing paper from range scale and install on the front of the switch body over the opening for the adjusting indicator point Positioning Switch may be mounted in any position Mounting Refer to Figures 1 and 2 for mounting 44 5 F 1 750 3 Sp m m I INCHES 44 5 Ha 1 750 0 9 223 DIA FOR MOUNTING FOR 10 190 DIA SCREW or M5 SCREW Figure 1 Optional Mounting Bracket 05 7 223 DIA FOR MOUNTING FOR 10 190 DIA SCREW 5 SCREW 2 PLACES 44 5 lt 1 750 5 7 200 m m I INCHES l6 Figure 2 General Purpose Enclosure Page 1 of 4 Automatic Switch Co 50 60 Hanover Road Florham Park New Jersey 07932 Piping Tubing Pressure Transducer Adequate support of piping and proper mounting of switch should be made to avoid excessive shock or vibration To minimize the effect of vibration on a switch mount perpendicular to vibration Connect piping or tubing
14. These should be of a direct acting or free swinging type with one valve located in each line between the unit and header Properly installed they will protect against damage from reverse rotation caused by air and material back flow through an idle unit After piping is completed and before applying power rotate the drive shaft by hand again If it does not move with uniform freedom look for uneven mounting piping strain excessive belt tension or coupling misalignment DO NOT operate the unit at this time unless it has been lubricated per instructions 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc LUBRICATION LUBRICATION For Units with a Grease Lubricated Drive End A simple but very effective lubrication system is employed on the drive shaft end bearings Hydraulic pressure relief fittings are provided to vent any excess grease preventing pressure build up on the seals A restriction plug and metering orifice prevent loss of lubricant from initial surges in lubricant pressure but permit venting excess lubricant under steadily rising pressures When servicing drive end bearings use a NLGI 2 premium grade grease with 300 F 149 C service temperature and moisture resistance and good mechanical stability Using a pressure gun slowly force new lubricant into each drive end bearing h
15. dry and protected indoor location is preferred However an outdoor location will normally give satisfactory service Important requirements are that the correct grade of lubricating oil be provided for expected operating temperatures and that the unit be located so that routine checking and servicing can be performed conveniently Proper care in locating driver and accessory equipment must also be considered Supervision of the installation by a ROOTS Service Engineer is not usually required for these units Workmen with experience in installing light to medium weight machinery should be able to produce satisfactory results Handling of the equipment needs to be accomplished with care and in compliance with safe practices Unit mounting must be solid without strain or twist and air piping must be clean accurately aligned and properly connected Bare shaft Units Two methods are used to handle a unit without base One is to use lifting lugs bolted into the top of the unit headplates Test them first for tightness and fractures by tapping with a hammer In lifting keep the direction of cable pull on these bolts as nearly vertical as possible If lifting lugs are not available lifting slings may be passed under the cylinder adjacent to the headplates Either method prevents strain on the extended drive shaft Packaged Units When the unit is furnished mounted on a baseplate with or without a driver use of lifting slings passing unde
16. fully to avoid damaging the lip seal 33 on the drive shaft keyway Remove the gasket 7 Remove oil slinger 40 and cap screw 60 4 Remove bearing clamp plates 34 by unscrewing capscrews 32 and removing lock washers 35 Keep shim halves 10 together exactly as removed by tagging them with each clamping plate Remove the headplate remove all capscrews 23 holding headplate to the cylinder Insert jacking screws into the four threaded flange holes and turn them in evenly The headplate will separate from the cylinder The lip seals 27 and bearing outer race and rollers are removed with the headplate and can be pressed out later Remove the bearing inner race and sleeve 38 from the shaft with aid of a bearing puller by inserting the puller jaws in the groove in the sleeve and applying the jacking screw against the end of the shaft Protect the threaded hole and the end of the shaft with a small flat spacer between the shaft and the puller DISASSEMBLY OF GEAR END 15 Drain oil completely from the gearbox sump by removing plugs 22 in bottom of the headplate 1 Loosen all flange screws 75 in the gearbox and remove all but two upper screws Bump the gear box to break the joint if it cannot be pulled free by hand then remove the last two screws and lift off the gearbox Remove gasket 7 Removing gears CAUTION Do not remove gear nuts 31 completely before the gears are unseated fr
17. lip seals Assembly of cylinder 11 to gear end headplate 1 Install dowel pins 16 and secure cylinder to headplate with capscrews 23 Torque to 35 ft Ibs 4 5 Kg m Then install drive end headplate 1 and dowel pins 16 and secure with capscrews 23 Install feet 76 amp 77 to both headplates and secure with capscrews 66 Torque to 35 ft Ibs 4 5 kg m For Gas Sealed Units Use a Teflon sealant between headplate and cylinder joint Assemble rotating seal apply a light coating of oil to the O ring and seal face Then with flute side out install the rotating seat tight to the shaft sleeve Check and record seal compression With the seal body in place and the impeller against the opposite headplate check that seal compression is adequate This can be checked using a depth gauge or dial indicator from the face of the head plate to the face of the mating ring First measure this distance while the carbon is out at its full length Then push the mating ring back against its stop and measure it again The difference between these measurements is the compression This can be done easily with finger pressure as the spring force is only 10 lbs The correct travel is given below record actual compression on clearance sheets SEAL COMPRESSION Maximum Minimum 047 097 108 151 Prior to to assembly lightly coat the groove in the sleave 38 with slip plate ROOTS P N 81
18. mounting plate be provided The plate should be at 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc least 1 inch 25 mm thick with its top surface machined flat and large enough to provide leveling areas at one side and one end after the unit is mount ed It should have properly sized studs or tapped holes located to match the unit foot drilling Proper use of a high quality machinist s level is necessary for adequate installation With the mounting plate in place and leveled set the unit on it without bolting and check for rocking If it is not solid determine the total thickness of shims required under one foot to stop rocking Place half of this under each of the diagonally opposite short feet and tighten the mounting studs or screws Rotate the drive shaft to make sure the impellers turn freely If the unit is to be direct coupled to a driving motor consider the height of the motor shaft and the necessity for it to be aligned very accurately with the unit shaft Best unit arrangement is directly bolted to the mounting plate while the driver is on shims of at least 1 8 inch 8mm thickness This allows adjustment of motor position in final shaft alignment by varying the shim thickness Aligning When unit and driver are factory mounted on a common baseplate the assembly will have been properly alig
19. this manual are available in basic frame sizes ranging from 2 inch to 7 inch gear diameter Various models within this gear diameter range are available with dif ferent case lengths to produce reasonable steps in flow capacity The shorter case lengths have lower volumetric capacities but are capable of operating against higher pressures All models are available for air service and there are specifically designed models for gas service The basic ROOTS rotary lobe blower is a positive displacement type unit Flow capacity is determined by frame size operating speed and pressure conditions It employs two impellers mounted on parallel shafts rotating in opposite directions within a cylinder closed at the ends by head plates As the impellers rotate gas is drawn into one side of the cylinder and forced out the opposite side The pressure or vacuum developed depends on the resistance of the piping and process system The unit is a precision engineered product with very fine clearances between the rotating impellers and stationary case Since there is no actual contact between these surfaces internal lubrication is not required Clearances are maintained by a pair of accurately machined timing gears mounted on the two shafts extended outside the blower casing Operation of the familiar basic rotary lobe blower is illustrated in FIGURE 1 where air flow is left to right from inlet to discharge with the top impeller rotating clockwise
20. way WALI 40 LOO H3HSVA STI YaMOTSIVU N 8 9 wal 459 uod 3 KINO SLINN 55 19 LHOIS 3 A18W3SSV 235 NONMVEGSUISOTTVNISTIO 14 91 099 w 20 009 298 438 13 81007 9 2 61 55 GANOYOLAGOLLAN ONILLAS 330339 NMOHS SV SONINV38 TIVISNI NOILONYLSNI 1 081 8 IWANVW SNILVH3dO 335 8 ATSWASSV 5 5 WALI TIVISNI 9 dd 9 1 06517628 SALON ZZ ILON 335 335 LON OQ ALON 335 MIIA ALON 335 um xum Lava 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc 27 sva 9 9 6 5 SVD 641435 6 TVSH3AINR Alawassy 06600 1 i ov
21. 00 16 75 25 19 11 00 18 00 11 00 26 13 19 50 17 00 23 25 14 50 1 562 375 x 188 6 0 FLG 3 50 530 718 14 00 23 75 32 19 11 00 18 00 11 00 26 13 19 50 17 00 23 25 14 50 1 562 375 x 188 8 0 FLG 3 50 650 13 5 00 8 50 5 00 1281 8 88 7 75 12 13 6 75 750 188 x 094 2 0 1 75 74 63 5 00 8 50 5 00 1281 8 88 7 75 12 13 6 75 750 188 094 2 5 1 75 102 00 6 25 10 25 6 25 15 06 10 63 8 75 13 63 8 25 875 188 x 094 1 5 2 00 88 50 6 25 10 25 6 25 15 06 10 63 8 75 13 63 8 25 875 188 x 094 2 5 2 00 109 63 6 25 10 25 6 25 15 06 10 50 8 50 13 63 8 25 875 188 x 094 3 0 2 00 128 38 6 25 11 25 6 75 17 38 11 88 10 25 17 25 8 75 1 125 250 x 125 2 5 2 50 143 00 6 25 11 25 6 75 17 38 12 25 11 00 17 25 8 75 1 125 250x 125 4 0 2 50 170 18 6 25 11 25 6 75 17 38 12 25 11 00 17 25 8 75 1 125 250 x 125 4 0 2 50 204 717 00 in horizontal configuration 21 00 in horizontal configuration DRESSER Roots B 12X95 April 2002 Copyright 2002 Dresser All rights reserved ROOTS is a trademark of Dresser Inc All dimensions in inches Dresser Inc Dresser ROOTS Dresser ROOTS Connersville Dresser ROOTS Holmes Operation 2135 Hwy 6 South
22. 900 West Mount Street PO Box B7 Houston TX 77077 Connersville IN 47331 Off St Andrews Rd PH 281 966 4700 PH 765 827 9200 Turnbridge Huddersfield FX 281 966 4309 FX 765 827 9266 England HD1 6RB Toll Free 1 877 363 ROOT S PH 44 1484 422222 FX 44 1484 422668 website www rootsblower com email dmd_roots dresser com Universal RAI and URAI are registered Trademarks of Dresser Inc All information subject to change without notice SPECIFICATIONS ROOTS Universal RAI Rotary Positive Blowers Frames 22 thru 718 OPERATING PRINCIPLE POSITION 1 POSITION 2 POSITION 3 POSITION 4 Two figure eight lobe impellers mounted on parallel shafts rotate in opposite directions As each impeller passes the blower inlet it traps a definite volume of air and carries it around the case to the blower outlet where the air is discharged With constant speed operation the displaced volume is essentially the same regardless of pressure temperature or barometric pressure Timing gears control the relative position of the impellers to each other and maintain small but definite clearances This allows operation without lubrication being required inside the gas casing OUTLINE DRAWING amp DIMENSIONAL TABLE INLET amp DISCHARGE CONNECTIONS TOP DISCHARGE pin p BOTTOM DISCHARGE LEFT DISCHARGE RIGHT DISCHARGE VERTICAL CONFIGURATION HORIZONTAL CONFIGURATION Drive S
23. End Gear End Fronts Backs Wavy iis End Float Inlet Center Discharge Min Max Min Max Min Max Min Max Minimum Min Max Min Max Min Max 012 014 006 009 003 005 003 008 003 004 006 002 004 002 004 31 36 15 23 08 13 10 15 08 20 08 05 10 05 10 012 014 006 009 003 005 007 012 006 005 007 003 005 002 004 31 36 15 23 08 13 15 30 13 13 18 08 13 05 10 013 015 006 009 003 005 013 018 008 005 007 003 005 002 004 33 38 15 23 08 13 31 43 17 13 18 08 13 05 10 013 015 006 009 003 005 016 021 011 006 008 004 006 004 006 33 38 15 23 08 13 36 48 28 15 20 10 15 10 15 013 015 006 009 003 005 022 027 017 008 010 004 006 004 006 33 38 15 23 08 13 51 64 38 20 25 10 15 10 15 012 014 006 008 004 006 017 022 011 009 01 1 004 006 002 005 31 36 15 20 10 15 38 51 28 23 28 10 15 05 13 012 015 006 009 004 006 024 029 018 013 015 005 007 002 005 31 36 15 23 10 15 61 74 46 33 38 13 18 05 13 NORMAL CLEARANCES FOR BLOWERS INCHES Impeller Lobes End Clearance Impeller Tips to Cylinders at 45 Each End Gear End 5 F Without Without Spring Require Fronts Backs Wavy
24. SERVICE REPLACEMENT OR NEW TRANSDUCER Consult Factory or Authorized Factory Representative or Distributors ORDERING INFORMATION For Two Stage Fixed Deadband Switch or New Transducer When Ordering Specify Catalog Numbers Fluid Pressure Range Temperature Range Serial Numbers and Proof Pressure or Rated Overrange Temperature NAMEPLATES ARE LOCATED ON SWITCH COVER AND BOTTOM OF TRANSDUCER Page 3 of 4 ASCO Valves Automatic Switch 59 60 Hanover Road Florham Park New Jersey 07932 CAUTION left side low signal setting indicator Adjusting nut will turn indicator set at 75 psig Use 1 4 wrench easily until it hits a stop for DO NOT OVERTORQUE right side high signal setting indicator indicator set at 10 psig high signal adjusting nut adjusting nuts low signal adjusting nut Electrical connections are 187 3 16 spade type MARKINGS LT L 2 SWITCH COMMUTATEUR SCHALTER INTERRUPTOR Enlarged isometric view showing Front view looking directly at adjusting nuts for signal settings two stage dual adjustment switch unit Figure 3 Adjustment Signal Setting of Two Stage Dual Adjustment Switch Unit IMPORTANT high signal The third digit in Catalog No adjusting nut CAUTION on the switch unit and transducer 4 low signal Adjusting nut will turn unit must be identical adjusting nut easily until it hits a stop See example below d DO NO
25. Spring Installed Center Discharge Min Max Min Max Min Max Min Max Minimum Min Max Min Max Min Max 009 013 009 013 003 005 003 008 003 004 006 002 004 004 006 23 33 23 33 08 13 08 20 08 10 15 05 10 10 15 009 013 000 013 003 005 007 012 006 005 007 003 005 005 007 23 33 23 33 08 13 15 30 13 13 18 08 13 13 18 010 014 010 014 003 005 013 018 008 005 007 003 005 005 007 25 36 25 36 08 13 31 43 17 13 18 08 13 13 18 010 014 010 014 003 005 016 021 011 006 008 004 006 006 008 25 36 25 36 08 13 36 48 28 15 20 10 15 15 20 010 014 010 014 003 005 022 027 017 008 010 004 006 008 010 25 36 25 36 08 13 51 64 38 20 25 10 15 20 25 011 013 011 013 004 006 017 022 011 009 011 004 006 009 011 28 33 28 33 10 15 38 51 28 23 28 10 15 23 28 011 013 011 013 004 006 024 029 018 013 015 005 007 013 015 28 33 28 33 10 15 61 74 46 33 38 13 18 33 38 IMPELLER TIMING FOR STANDARD ROTATION VIEWED FROM GEAR END SLADE 459 45 si 5 25 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI
26. ToRQUE Frame Size 22 24 32 33 36 42 45 47 53 56 59 65 68 615 76 711 718 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc 6 7 Check the end clearances between impellers and headplates Adjust clearances per B 15 below When clearances are correct clean and re install the gearhouse Check condition of flange gasket 7 and replace if questionable Fill gearhouse to correct level with proper grade oil B Replacing Shaft Bearings and Impellers Remove coupling or sheave from the drive shaft Drain and remove gearhouse and pull the timing gears gears are to be re used mark them so they may be returned to the same shafts 1 Break corners and deburr the keyway Remove bearing end cover at the drive end Remove bearing clamp plates 34 Make single and double identifying punch marks on the mating edges of headplate and cylinder flanges at the two ends of the blower At the drive end drive out the two dowel pins and remove all capscrews holding headplate to cylinder By inserting jacking screws into the two threaded flange holed and turning them in evenly the headplate will be separated from the cylinder As the headplate comes off the shafts it will bring bearings with it 2 1 2 and 3 1 2 gear diameter units do not have tapped hol
27. are registered trademarks of Dresser Inc NYHL 6 4 8 521835 TVSH3AINR 40 Alawassy u a vomuso wei wu vs 7007 9 XL paso mee 985340 S1008 OSSA womens g onan rem d 55 L St d 5 NC 5 H3dV L Noa sz WALI FINO GISA S 2 1 2 3ROWOLIDNWVIS EVEN 3 NEED NN DOO ATI8W3SSV gt 5 anemia Mee LAT SEHRSISRTSNITOEN T AS 170 2 1 4850 1870 1880 4 5003 Xa 3215 12 O 5 3 I 13 ALON 335 se HG NX abi X CW ILON 33S P ay WN 9
28. be repaired at all unless specific approval has been obtained through a Sales Office or the factory before starting work Unauthorized disassembly within the warranty period will void the warranty For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 14 It is recommended that major repairs be performed at an authorized ROOTS facility However it is recognized that this may not always be practical If a blower is out of warranty mechanical adjustments and parts replacement may be undertaken locally at the owner s option and risk It is recommended that ROOTS parts be used to insure fit and suitability The maintenance of a small stock of on hand spare parts can eliminate possible delays When ordering parts give Item numbers and their word descriptions from sectional drawings and parts lists Also specify quantities wanted and the blower size and serial number from the nameplate Repairs or adjustments are best performed by personnel with good mechanical experience and the ability to follow the instructions in this manual Some operations involve extra care patience and a degree of precision work This is especially true in timing impellers and in handling bearings Experience indicates that high percentages of bearing failures are caused by dirt contamination before or during assembly Therefore the work area should be cleaned before starting disassembly and new or re usable parts protected du
29. conditions and a description of the trouble Unauthorized attempts at equipment repair may void ROOTS warranty 1 Units out of warranty may be repaired or adjusted by the owner It is recommended that such work be limited to the operations described in this manual using ROOTS parts Good inspection and maintenance practices should reduce the need for repairs NOTE Information in this manual is correct as of the date of publication ROOTS reserves the right to make design or material changes without notice and without obligation to make similar changes on equipment of prior manufacture For your nearest ROOTS Office dial our Customer Service Hot Line toll free 1 877 363 ROOT S 7668 or direct 281 966 4700 DRESSER Roots ROOTS products are sold subject to the current General terms of Sale GTS 5001 and Warranty Policy WP 5020 Copies are available upon request Contact your local ROOTS Office or ROOTS Customer Service Hot Line 1 877 363 ROOT S 7668 SAFETY PRECAUTIONS It is important that all personnel observe safety precautions to minimize the chances of injury Among many considerations the following should be particularly noted Blower casing and associated piping or accessories may become hot enough to cause major skin burns on contact Internal and external rotating parts of the blower and driving equipment can produce serious physical injuries Do not reach into any opening in the b
30. higher than ambient the listed allowable temperature rise values must be reduced by 2 3 of the difference between the actual measured inlet temperature and the ambient temperature The average of the inlet and discharge temperature must not exceed 250 121 C SPEED These blowers amp exhausters may be operated at speeds up to the maximum listed for the various frame sizes They may be direct coupled to suitable constant speed drivers if pressure tempera ture conditions are also within limits At low speeds excessive temperature rise may be a limiting factor Special Note The listed maximum allowable tempera ture rise for any particular blower amp exhauster may occur well before its maximum pressure or vacuum rating is reached This may occur at high altitude low vacuum or at very low speed The units operating limit is always determined by the maximum rating reached first It can be any one of the three Pressure Temperature or Speed For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 2 INSTALLATION ROOTS blowers amp exhausters are treated after factory assembly to protect against normal atmospheric corrosion The maximum period of internal protection is considered to be one year under average conditions if shipping plugs amp seals are not removed Protection against chemical or salt water atmosphere is not provided Avoid opening the unit until ready to start installa
31. may result in shaft breakage CAUTION Couplings as well as sheave bushings must have a slight slide fit with the unit shaft such that they can be installed in place by hand Any force used to install them could change unit end clearance resulting in unit damage If interference fit is desired for the coupling the coupling hub should be heated and shrunk on the shaft For engine drives use locktite between the coupling hubs and the shafts and on the threads of the coupling set screws The driver sheave should also be mounted as close to its bearing as possible and again should fit the shaft correctly Position the driver on its adjustable base so that 2 3 of the total movement is available in the direction away from the unit and mount the assembly so that the face of the sheave is accurately in line with the unit sheave This position minimizes belt wear and allows sufficient adjustment for both installing and tightening the belts After belts are installed adjust their tension in accordance with the manufacturers instructions However only enough tension should be applied to prevent slippage when the unit is operating under load Excessive tightening can lead to early bearing failures or shaft breakage Before operating the drive under power to check initial belt tension first remove covers from the unit connections Make sure the interior is still clean then rotate the shaft by hand Place a coarse screen over the inlet con
32. steps in the chart below to make signal settings Test one snap switch at a time Be sure to start with low signal side Form No V7050R1 50 60 Hanover Road Florham Park New Jersey 07932 NORMALLY CLOSED NORMALLY OPEN Switch Test Lamp Switch Test Lamp Terminal On Off Terminal On Off On Off Closed Open Circuit Circuit Adjustment Procedures 1 Starting with zero signal connect test lamp to common 2 Apply desired tuation signal Then Off On back off signal adjust NC Open NO Closed ing nut until switch Circuit Circuit actuates 3 Lower signal to On Off check reactuation NC Closed NO Open signal Circuit Circuit 5 To adjust high signal setting repeat steps of adjustment in chart above 6 Cycle between actuation and reactuation signals and make minor adjustments to nuts as required to achieve the exact signal setting 7 After settings have been made make permanent electrical connections Adjustment Signal Setting of Normally Closed or Normally Open Switch Decreasing Signal Refer to Figure 3 1 If the switch is in the line of final application when adjustment signal setting is made be sure switch can be test operated without affecting other equipment 2 On general purpose and watertight constructions remove switch cover 3 Turn low signal adjusting nut until low signal setting indictor is fully down Then turn high signal adjusting nut until high signal indictor is full
33. with counter clockwise rotation and discharge down See Figure 3 and 4 for other various unit arrangements and possible conversions When a unit is DIRECT COUPLED to its driver the driver RPM must be selected or governed so as not to exceed the maximum speed rating of the unit Refer to For your nearest Roots Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 Table 1 for allowable speeds of various unit sizes A flexible type coupling should always be used to connect the driver and unit shafts Coupling halves must be accurately aligned and a sufficient gap between shaft ends provided so that side strains and end thrust on either shaft are avoided or minimized This will require considerable care in the mounting of the driver The two shafts must be in as near perfect alignment in all directions as possible and the gap must be established with the motor armature on its electrical center if end play exists The following requirements of a good installation are recommended Coupling halves must be fitted to the two shafts with a line to line thru 001 interference fit Coupling halves must be warmed up so that only light tapping is required to install them Maximum deviation in offset alignment of the shafts should not exceed 005 13 mm total indicator reading taken on the two coupling hubs Maximum deviation from parallel of the inside coupling faces should not exceed 001 03 mm when checked at six po
34. with thickness equal to gear end clearance Table 5 between the impeller and the gear end headplates Tap on top of the fork until the shim becomes snug Remove the shim and check end clearances To increase gear end clearance tap on the end of the gear end shaft with a soft metal mallet Set end clearances for 6 amp 7 by turning capscrews 31 evenly in or out 16 Install drive end cover 5 after packing bearing cavities with suitable grease Replace drive shaft seal Lip must point toward 33 the bearing Exercise care not to damage the lip as it passes over shaft keyway 17 Install gasket item 7 Install the gear house after cleaning out the inside Tighten gear box cap screws 23 evenly Fill with correct grade of oil until oil flows out through oil level hole Grease drive and bearings See Lubrication 18 Reinstall coupling or belt sheave making sure that they have a slight slide fit with the shaft and could be installed by hand TECHNICAL SUPPLEMENT for 32 33 36 42 45 47 53 56 59 65 68 615 UNIVERAL BLOWERS ROOTS Universal RAI G rotary positive gas blowers are a design extension of the basic Universal blower model URAT G blower uses 4 mechanical seals in place of the standard in board lip seals to minimize gas leakage into the atmosphere The seal vent chambers are plugged These units are intended for gases which are compatible with cast iron case material steel shafts 300 40
35. without notice Frame Sizes 8 DISCHARGE CONNECTIONS TOP DISCHARGE ore T 5 BR NN E M BOTTOM DISCHARGE LEFT RIGHT DISCHARGE DISCHARGE Drive Shaft Inlet amp Approx Location U Keyway disch AX Net W ize D 01 Ibs 33 7 25 7 63 12 36 7 25 10 00 14 42 8 00 7 25 13 45 8 00 10 00 15 47 8 00 11 75 17 53 10 50 8 38 15 56 10 50 11 00 18 59 10 50 14 00 21 22 5 13 5 00 9 75 3 75 6 25 3 75 9 63 6 88 6 25 9 25 5 00 625 188 094 1 0 NPT 1 25 32 24 5 13 7 00 11 75 3 75 625 3 75 963 6 88 625 9 25 5 00 625 188 094 2 0 1 25 43 32 7 25 6 75 11 25 5 00 850 5 00 1281 8 88 7 75 12 13 6 75 750 188 x 094 1 25 1 75 69 65 11 00 10 00 18 38 8 75 14 75 8 75 21 63 15 13 12 75 19 75 11 75 1 375 312 x 156 3 0 3 00 245 68 11 00 13 00 21 38 8 75 14 75 8 75 21 63 15 13 12 75 19 75 11 75 1 375 312 x 156 5 0 3 00 285 615 11 00 20 00 28 38 8 75 14 75 8 75 21 63 16 25 15 00 19 75 11 75 1 375 312 x 156 6 0 FLG 3 00 425 76 14 00 11 75 19 94 11 00 18 00 11 00 26 13 20 69 19 38 23 25 14 50 1 562 375 x 188 4 0 3 50 400 711 14
36. 0 series stainless steel and carbon seal components viton o rings and the oil grease lubricants If there are any questions regarding application or operation of this gas blower please contact factory Precaution URAI G blowers Care must be used when opening the head plate seal vent chamber plugs 43 as some gas will escape if it is a pres sure system or the atmospheric air will leak in if the system is under vacuum There is a possibility of some gas leakage through the mechanical seals This leakage on the gear end will escape through the gear box vent and on the drive end through the grease release fittings If the gas leakage is undesirable each seal chamber must be purged with an inert gas through one purge gas hole 43 per seal There are two plugged purge gas holes 1 8 NPT provided per seal The purge gas pressure must be maintained one psi above the 13 discharge gas pressure Also there exists a possibility of gear end oil and drive end grease leakage into the gas stream The lubricants selected must be compatible with the gas Mechanical Seal Replacement Disassemble the blower During disassembly damage to mechanical seals is very likely During rebuild always use new mechanical seals Prior to any assembly make sure that all parts are completely clean and free from nicks and scratches 1 Place head plate on an assembly table with seal bores pointing up Coat the OD of the stationary seal element and i
37. 3 314 000 6 Installation of bearings 14 Heat bearing inner race to 300 F 149 C in an oven or hot oil then slide it onto the shaft so the bearing shoulder is snugly against the sleeve Note Be sure to install the shaft shim 70 behind the shaft sleeve before installing the drive end drive bearing inner race This is required to compensate for the oil leader for shimming Insert the bearing outer race and rollers in each bore and tap lightly in place Spray bearings with lubricant Measure and record the end clearances between the impellers and drive headplate using long feeler gauges Then subtract the allowed average drive end clearance See Table 6 The result is the space required between clamping plates 34 and bearing outer race Place shims 10 as required to get this clearance Then fasten the clamping For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 16 10 11 12 plates to the headplate with capscrews 32 and lock washers 35 Installation of gear end bearings 14 Turn the blower so that the gear end headplates is up Heat bearing inner race to 300 F 149 C an oven hot oil then slide it onto the shaft so that the bearing shoulder is snugly against the sleeve Insert the bearing outer race and rollers in each bore and tap lightly into place Measure and record the end clearance between the impellers and gear end headplate th
38. 5 30 01 012 25 30 23 30 30 38 30 38 008 011 008 013 008 013 005 008 13 20 13 20 005 008 1 003 004 003 004 0 0 0 011 013 015 017 33 43 012 016 014 018 012 016 30 40 014 018 36 46 014 018 36 46 3 20 15 20 15 20 006 008 005 008 006 008 006 008 1 5 20 006 008 15 20 006 008 15 20 0 0 003 004 08 0 1 006 008 006 008 8 1 8 1 8 1 5 20 15 20 006 008 15 20 006 008 15 20 006 008 15 20 3 2 015 017 3 3 2 010 014 010 014 36 8 33 8 43 8 43 5 36 25 36 013 015 33 38 013 015 33 38 013 015 33 38 IMPELLER TIMING FOR STANDARD ROTATION VIEWED FROM GEAR END FRONTS jj Thrust Adjuster Fork ROOTS P N 812 973 00X Nylok Capscrew Bearing Thrust Adjuster Saddle ROOTS P N 812 974 00 Clamp Plate THRUST SETTING 2 1 2 THRU 5 Gap 03 05 UNIVERSAL BLOWERS K 249392 For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 24 TABLE 6 NORMAL CLEARANCES FOR RAM J 8 RAM GJ WHISPAIR BLOWERS INcHES End Clearance Impeller Tips to Cylinders Impeller Lobes at 45 Each
39. 7 10 8 163 11 8 8 157 14 2 155 152 2850 f 310 18 1 307 19 7 301 23 0 298 24 6 295 26 2 860 i 1760 3600 700 1760 3 290 17 9 285 19 6 2850 531 30 0 526 32 7 700 i 1760 2850 70 7 8 700 1760 20 4 325 22 3 9 307 29 8 2350 27 4 470 30 4 0 452 40 5 700 1760 580 32 2 522 35 2 2350 763 43 8 755 47 8 700 1760 2350 575 1400 36 1 421 38 6 2050 0 682 57 6 575 1400 2050 575 1400 2050 Copyright 2002 Dresser Inc All rights reserved ROOTS is a trademark of Dresser Inc Universal RAI and URAI are registered Trademarks of Dresser Inc All information subject to change without notice Universal Vacuum Table 4 Hg 6 Hg 10 Hg 12 Hg 14 Hg 15 Hg 16 Hg Vacuum Vacuum Vacuum Vacuum Vacuum Vacuum Vacuum CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP Frame Speed 6 0 3 45 0 6 42 0 9 35 1 3 32 1 6 28 2 0 72 69 1 4 62 20 59 2 4 55 2 7 N ak S En gt N ak A 42 7 5 160 80 793 34 4 1272 51 3 Copyright 2002 Dresser Inc All rights reserved ROOTS is a trademark of Dresser Inc Universal RAI and URAI are registered Trademarks of Dresser Inc All information subject to change
40. BLOWERS PARTS LIST Part Name Headplate Gear End Headplate Drive End Gearbox Gears Cover Blind Plug Opening Gasket Nameplate Lube Bearing G E Driven Bearing Drive D E Drive Pin Dowel Gear Nut Key Screw Self Tap Plug Pipe Screw Hex Breather Plug Vent Screw Hex Seal Washer wavy Spring Washer Screw Hex Screw Hex Seal Lip Drive Clamp Plate Foot Foot Fitting Grease Fitting Relief Washer Flat Screw Socket Screw Button Hd Screw Hex Plug Washer B w e a 1 14 32 and 42 URAI G only 31 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc SERIES PARTS LIST No Part Name Headplate Gearbox Gear Assembly End Cover Gasket Gearbox Cover Installation Tag Shims 010 Bearing Roller Pin Dowel Pull Out Pin Dowel Key Square Screw Drive Rd Hd Breather Plug Pipe Screw Cap Hex Hd Seal Viton Piston Ring Seal Washer Wavy Spring Nut Hex ESNA Scr Cap Hex Hd Seal Lip Brg Clamp Plate D Lock Washer Spring Sight Plug Oil Level Sleeve GE amp DE Sleeve Piston Ring ars Slinger D E Top Drive Slinger D E Bottom Drive Rotation Arrow Label S
41. System power must be disconnected and locked out prior to servicing START UP A Bump the motor to check for gt Freedom of rotation Proper blower rotation Start unit and operation for fifteen minutes with no load checking for hot spots noise and other indications of interference Allow pump to cool to room temperature and recheck oil level Add oil if necessary being careful not to overfill Start unit and apply load observe operation for the first hour monitor pressure vacuum and air temperature at outlet of the blower Check all connections for air leaks Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com Check the amp draw of the motor to be sure that the full load amp rating is not exceeded See motor nameplate gt Do not operate blower beyond manufacturers recommended limits gt Be aware that there are also minimum recommended RPM limitations below which adequate lubrication will not be maintained gt Consult the manufacturers insert or factory for the specific limits for this blower 6 Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com MAINTENANCE A Check oil level daily B Refer to the general lubrication guidelines in this manual for recommended frequency of oil change and type of oil For more specific information on blower maintenance and lubrication see the manufacturer s insert manual accompanying this manual C Clean t
42. T 3 WAY UNIVERSAL EXTERNAL SIGHT GLASSES 37 amp BREATHERS 21 MUST BE RELOCATED AS SHOWN FEET 76 amp 77 amp LIFTING LUGS 63 MUST BE RELOCATED AS SHOWN 27 mine INLET L S DISCH L H DRV BTM DISCH R H DRV TOP DISCH 2 NON STANDARD ARRANGEMENT 3 WAY UNIVERSAL CYLINDER 11 MUST BE UNBOLTED FROM HEADPLATES 1 AND DISCHARGE RELOCATED AS SHOWN MUST HAVE AUTHORIZATION FOR CONVERSION SO NOT TO VOID WARRANTY EXTERNAL SIGHT GLASSES 37 amp BREATHERS 21 MUST BE RELOCATED ALSO FEET 76 amp 77 amp LIFTING LUGS 63 MUST BE RELOCATED AS SHOWN DISCH Er EN 2 TOP DRV R S DISCH R H DRV BTM DISCH L H DRV TOP DISCH 3 BOTTOM DRIVE SHAFT ARRANGEMENT SPECIAL ORDER 3 WAY UNIVERSAL SPECIAL OGE OIL SLINGER REQUIRED FOR ASSEMBLY MAY BE CONVERTED TO HORIZONTAL CONFIGURATION AS PREVIOUSLY SHOWN INLET INLET 21 BTM DRV R S DISCH BTM DRV L S DISCH 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc TABLE 1 URAI J WHISPAIR amp URAI G GAS BLOWER Maximum ALLOWABLE OPERATING CONDITIONS Gear Temp Rise Delta Pressure Inlet Vacu
43. T OVERTORQUE two stage dual adjustment switch unit example REN f 4 Catalog No PC 1 6A 3 scale provided RA with transducer Torque bolts 4 in a crisscross manner to 80 10 in lbs 9 0 1 1Nm tranducer unit pressure type example Catalog No RF 1 0A21 4 mounting bracket optional feature order no bolts 4 Figure 4 Open Frame Switch Switch Unit and Transducer Unit to be assembled Form No V7050R1 Page 4 of 4 ASCO Valves Automatic Switch Co 50 60 Hanover Road Florham Park New Jersey 07932
44. TED s connector Order No 05 06 0304 and connector housing Order No 06 02 3031 IMPORTANT Electrical load must be within range stated on nameplate Failure to stay within the electrical range of the switch rating may result in damage to or premature failure of electrical switch CAUTION Do not exert excessive screw driver force on snap switch when making terminal connections When connections are made be sure there is no stress on the wire leads Either condition may cause malfunction of switch ELECTRICAL RATINGS Ratings for Limit Controls and Pressure Operated Switches Ratings for Industrial Controls and Temperature Indicating and Regulating Equipment 2 Amps Res 125 250 VAC Standard 1 8 HP 125 VAC Switch 1 4 HP 250 VAC Rating 1 2 Amp Res 125 VDC 1 4 Amp Res 250 VDC 10 Amps Res 125 250 1 3 HP 125 250 VAC 1 2 Amp 125 125 VDC 1 4 Amp 250 VDC 125 VA PILOT DUTY 120 240 VAC SCHEMATIC DPDT N N N C N C ELECTRICAL TERMINALS Electrical terminals 187 spades arranged normally open contacts normally closed contacts common contacts high signal setting right low signal setting left DuPont s Registered Trademark Page 2 of 4 ASCO Valves Automatic Switch Co INSTALLATION OF TEMPERATURE TRANSDUCERS Direct Probe The direct probe local temperature transducer is provided with 1 2 NPT connection When installing do not use switch unit as a l
45. accessories 19 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc FIGURE 4 BLOWER ORIENTATION CONVERSION Special Note WHISPAIR models are designed to operate with only one shaft rotation direction to take full advantage of the Whispair feature Therefore a Universal RAI yes no WHISPAIR blower should be operated in the following combinations only CCW Rotation Bottom Shaft Right side discharge URAI G or a Left Shaft Bottom discharge CCW Rotation Top Shaft Left side discharge or a Right Shaft Top discharge CW Rotation Bottom Shaft Left side discharge a Right Shaft Bottom discharge CW Rotation Top Shaft Right side discharge or a Left Shaft Top discharge Model Reversible Whispair Rotation Design URAI J no BLOWER ORIENTATION AND LUBRICATION Points UNIVERSAL 8 URAI G GAS BLOWERS Breather Left Discharg Relief Fitting Vertical Gear End Y Right Drive Shaft on Top Discharge Drive Shaft on Bottom Vertical Mounting Breather Grease Fitting Discharge Grease Fitting 1 Discharge Drive Shaft on Left Horizontal Mounting For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 20 FIGURE 5 BLOWER ORIENTATION CONVERSION WHISPAIR 1 STANDARD ARRANGEMEN
46. ace oil drain plugs 22 and refill drive end and gear sumps with proper grade of oil as discussed under LUBRICATION Install drive sheave or coupling half and install blower refer to INSTALLATION instructions 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc FIGURE 2 ALLOWABLE OVERHUNG Loans FOR V BELT DRIVES UNIVERSAL RAI URAI J UNITS 252100 Motor HP Belt Pull 05 Blower RPM Sheave Diameter C Distance between drive bearing center line and sheave center line A B Sheave Width 1 8 2 Shaft Load Belt C Dimension Max Allowable Shaft Load Ib in 22 24 32 33 36 42 45 47 53 56 59 65 68 615 76 711 718 NOTE Arc of sheave belt contact on the smaller sheave not to be less than 170 Driver to be installed on the inlet side for vertical units and on the drive shaft side for horizontal units ALLOWABLE OVERHUNG LOADS FOR V BELT Drives 400 600 units 77 y yl E yyl 212 lt gt 1 8 27500 Motor HP Belt Pull Ibs Blower RPM Sheave Diameter Sheve Width Shaft Load
47. actices should be in accordance with the manufacturer s instructions If direct connected to the blower through a lubricated type coupling the coupling should be checked and greased each time blower oil is changed This will help reduce wear and prevent unnecessary vibration In a belted drive sys tem check belt tension periodically and inspect for frayed or cracked belts In a new and properly installed unit there is no contact between the two impellers or between the impellers and cylinder or headplates Wear is confined to the bearings which support and locate the shafts the oil seals and the timing gears All are lubricated and wear should be minimal if clean oil of the correct grade is always used Seals are subject to deterioration and wear and may require replacement at varying periods Piston ring seals 28 are designed to operate without rubbing contact once temperature and thermal growth have stabilized The stationary rings will rub the rotating sleeve 38 briefly as a result of temperature cycles that occur during the startup and shutdown of the unit The sleeves are hardened and the rings are coated with dry lubricant that provides for temporary break in wear Replace piston ring seals if they become exces sively worn or inspection shows more than 010 25mm axial clearance between ring and groove Shaft bearings are designed for optimum life under average conditions with proper lubrication and are critical to th
48. al parts failure Operating clearances within a blower are only a few thousandths of an inch This makes it possible for impeller interference or casing rubs to result from shifts in the blower mounting or from changes in piping support If this type of trouble is experienced and the blower is found to be clean try removing mounting strains Loosen blower mounting bolts and reset the leveling and drive alignment Then tighten mounting again and make sure that all piping meets blower connections accurately and squarely Foreign materials in the blower will also cause trouble which can only be cured by disconnecting the piping and thoroughly cleaning the blower interior A wide range of causes amp solutions for operating troubles are covered in the TROUBLE SHOOTING CHECKLIST The remedies suggested should be performed by qualified mechanics with a good background using procedures detailed in this manual Major repairs generally are to be considered beyond the scope of maintenance and should be referred to ROOTS Warranty failures should not be repaired at all unless specific approval has been obtained through ROOTS before starting work Unauthorized disassembly within the warranty period will void the warranty For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 10 It is recommended that major repairs be performed at an authorized ROOTS facility However it is recognized that this may not alwa
49. be mated with a wide selection of pressure and temperature transducers to cover a broad range of pressure fluids and temperatures The switch will control electrical circuits in response to change in pressure and temperature signals IMPORTANT These instructions cover the installation and use of this switch on pressure and temperature transducers Select the paragraphs that apply to your particular installation and application The word signal is used in place of pressure or temperature changes INSTALLATION Check the nameplate for the correct catalog number pressure range temperature range media and proof pressure or rated overrange tempera ture Never apply incompatible fluids or exceed the pressure or temperature rating of the switch Installation and inspection to be performed by qualified personnel Nameplates are located on the switch or switch cover and on the bottom of the transducer Check to be sure the third digit in each number is the same If not the unit should not be used Refer to Figure 4 IMPORTANT All internal adjustments have been made at the factory Any adjustment alteration or repair to the internal parts of the switch other than stated herein voids all warranties The signal setting adjustments required are made by the adjusting two nuts on the top of the switch Temperature Limitations Switch ambient temperature limits are 4 F 20 C to 122 F 50 To determine fluid temperature limitation
50. bly of seals 27 in headplate 1 Place headplate flat with seal bores up Be sure the pressing tool face is clean and square and there is a smooth clean entering bevel in the headplate Lubricate the seal lips Place seal over the bore with lip facing up then press the seal evenly until it is flush with bore face For Gas Sealed Units Assemble mechanical seals 27 in headplate CAUTION Care must be used to avoid damaging the carbon face Before proceeding with this step you should have a piloted seal driver which is designed to clear the carbon face with headplate positioned horizontally with seal bores up Be sure the pressing tool face is clean and square and there is a smooth clean entering bevel in the headplate Place the seal over the bore with carbon facing up Then press the seal evenly on its steel shell using the piloted seal driver until the driver seats against the stop Assembly of impellers 12 and 13 to headplate 1 Place gear end headplate flat on in 76 mm blocks with the smallest bores facing up Inspect entering bevels to be sure they are smooth and clean Locate the drive impeller correctly top for vertical units and toward the driver for horizontal units Place the seal ring gaps toward the inlet for pressure applications and towards dis charge for vacuum applications Insert the impeller shafts in the headplate so the impellers rest on the headplate Use care to avoid damaging the
51. casing and gears is likely to occur Oil seals should be considered expendable items to be replaced whenever drainage from the headplate vent cavity becomes excessive or when the blower is disassembled for any reason Sealing effectiveness can vary considerably from seal to seal and is also affected to surprising degree by shaft finish under the seal lip Because of these normal variables minor seal leakage should not be considered as indicating seal replacement Timing gear wear when correct lubrication is main tained should be negligible over a period of years Gear teeth are cut to provide the correct amount of backlash and gears correctly mounted on the shafts will accommodate a normal amount of tooth wear without permitting contact between lobes of the two impellers However too high an oil level will cause churning and excessive heating This is indicated by unusually high temperature at the bottom of the gear housing Consequent heating of the gears will result in loss of tooth clearance backlash and rapid wear of the gear teeth usually will develop Continuation of this tooth wear will eventually produce impeller contacts knocking and from this point serious damage will be unavoidable if blower operation is continued A similar situation can be produced suddenly by gear tooth fracture which is usually brought on by sustained overloading or momentary shock loads Problems may also develop from causes other than intern
52. ccessory items that might be required under various operating conditions Inlet piping should be completely free of valves or other restrictions When a shut off valve can not be avoided make sure a full size vacuum relief is installed nearest the unit inlet This will protect against unit overload caused by accidental closing of the shut off valve Need for an inlet silencer will depend on unit speed and pressure as well as sound level requirements in the general surroundings An inlet filter is recommended especially in dusty or sandy locations A discharge silencer is also normally suggested even though Whispair units operate at generally lower noise levels than conventional rotary blowers Specific recommen dations on silencing can be obtained from ROOTS Discharge piping requires a pressure relief valve and should include a manual unloading valve to permit starting the unit under no load conditions Reliable pressure vacuum gauges and good thermometers at both inlet and discharge are recommended to allow making the important checks on unit operating condi tions The back pressure regulator shown in Figure 2 is useful mainly when volume demands vary while the unit operates at constant output If demand is constant but somewhat lower than the unit output excess may be blown off through the manual unloading valve In multiple unit installations where two or more units operate with a common header use of check valves is mandatory
53. clockwise or counterclockwise rotation 4 Long life anti friction bearings Oversize cylindrical roller bearings at the drive shaft handle v belt stress all bearing points are engineered for long service life Vertical Gear End Drive Shaft Bottom Drive Shaft on Top Copyright 2002 Dresser Inc All rights reserved VERTICAL MOUNTING ROOTS is a trademark of Dresser Inc Horizontal air flow Universal RAI and URAI are registered Trademarks of Dresser Inc All information subject to change without notice 5 Versatile mounting 6 Rugged steel mounting feet You can mount the Universal in multiple The Universal RAI can be easily changed positions to accommodate your specific needs from horizontal flow to vertical flow using the With your choice of 17 frame sizes there s a same mounting feet Universal RAI that fits right into your OEM or interchangeable with the mounting holes of replacement application competitive Roots type blowers Operating Principle x Two Figure 8 lobe impellers mounted on parallel shafts rotate in opposite directions As each impeller passes the blower inlet it traps definite volume of air and carries it around the case to the blower outlet where the air is discharged With constant speed operation the displaced volume is essentially the same regardless of pressure temperature or barometric pressure Timing gears control the relative p
54. d for correct rotation some models of blower are unidirectional and damage could occur if rotation is reversed Refer to certified drawing or consult CAMCORP representative for rotation Blowers are shipped without lubrication oil do not operate before lubrication All system piping must be clean internally before connecting to blower Check lubrication level only when blower is stopped Keep inlet and inline filters clean Keep belts properly tensioned and aligned Use of a check valve on pressure and combination packages will prevent reversing of blower on shutdown Keep pressure and or vacuum relief valves in good condition so that maximum pressure or vacuum is not exceeded Never attempt to regulate airflow by restricting intake or exhaust of a positive displacement blower 2 Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com PRINCIPLE OF OPERATION CAMCORP blower packages are set up to provide air to a pressure conveying system or vacuum required for a negative pressure system Typically the positive displacement blower used on such a package is not capable of supplying air to a pressure higher then 15 psig or vacuum greater then 14 Hg Depending on the specific blower it may have a maximum pressure or vacuum capability of somewhat less than that Because of limitations involved the blower motor and line size of the system must be designed specifically to meet the requirements of the syste
55. demarks of Dresser Inc the headplate bores Generally new seals will be required prior to reassembly Remove the bearing inner race and sleeve 38 from the shaft with the aid of a bearing puller by inserting the puller jaws in the groove in the sleeve and applying the jacking screw against the end of the shaft Protect the threaded hole and the end of the shaft with a small flat spacer between the shaft and the puller ASSEMBLY Prior to any assembly operation it is essential that all parts are completely clean and free from nicks and scratches Prior to assembly lightly coat the groove in the sleave with slip plate ROOTS P N813 31 4 000 1 Assembly of Piston ring seals 28 To avoid scratching the lip seal surface install the Piston ring seals 28 in the sleeves 38 from the end nearest the groove before assembling the sleeve on the shaft Unhook the gap joint and expand the ring while sliding it to the groove then compress it so one end of the hook joint slides over the other Move the ring in the groove to be sure it is free NOTE Care must be taken not to scratch or dent the sleeve surface since it is the sealing surface for the lip seal Installation of sleeves 38 heat the sleeve to 300 F 149 C then quickly slide it on the shaft tightly against the impeller If the sleeve hangs up during assembly it can be pressed into place using a tubular pressing tool with square clean ends Assem
56. e service life of the blower Gradual bearing wear may allow a shaft position to change slightly until rubbing develops between impeller and casing This will cause spot heating which can be detected by observing these surfaces Sudden bearing failure is usually more serious Since the shaft and impeller are no longer supported and properly located extensive general damage to the blower casing and gears is likely to occur Oil seals should be considered expendable items to be replaced whenever drainage from the headplate vent cavity becomes excessive or when the blower is disassembled for any reason Sealing effectiveness can vary considerably from seal to seal and is also affected to surprising degree by shaft finish under the seal lip Because of these normal variables minor seal leakage should not be considered as indicating seal replacement Timing gear wear when correct lubrication is main tained should be negligible over a period of years Gear teeth are cut to provide the correct amount of backlash and gears correctly mounted on the shafts will accommodate a normal amount of tooth wear without permitting contact between lobes of the two impellers However too high an oil level will cause churning and excessive heating This is indicated by unusually high temperature at the bottom of the gear housing Consequent heating of the gears will result in loss of tooth clearance backlash and rapid wear of the gear teeth usually wil
57. eases by increments of 15 18 F 8 C 10 C the life is reduced by half Example Oil temperatures of 230 236 110 C 113 C will produce life expectancy of 1 4 or 500 hours Therefore it is considered normal to have oil change periods of 500 hours with petroleum based oils For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 6 OPERATION Before operating a blower under power for the first time recheck the unit and the installation thoroughly to reduce the likelihood of avoidable troubles Use the following procedure check list as a guide but consider any other special conditions in the installation certain that no bolts tools rags or debris have been left in the blower air chamber or piping If an outdoor intake without filter is used be sure the opening is located so it cannot pick up dirt and is protected by a strong screen or grille Use of the temporary protective screen as described under INSTALLATION is strongly recommended 0 Recheck blower leveling drive alignment and tightness of all mounting bolts if installation is not recent If belt drive is used adjust belt tension correctly Turn drive shaft by hand to make sure impellers still rotate without bumping or rubbing at any point sure oil levels in the main oil sumps are correct Check lubrication of driver If it is an electric motor be sure that power is available and that e
58. en sub tract the allowed average gear end clearance See Table 6 The result is the space required between clamping plate 54 and bearing outer race Place shims 10 as required to get this clearance Then fasten the clamping plates 54 to the headplate using capscrews 32 and lock washers 35 Do not install wavy spring washers 29 at this time as a final check of clearances is required first Final check of end clearances and float Using long feeler gauges check the clearance between the impellers and drive end headplate See Table 6 Place the blower assembly on its feet and correct shimming as required Then force the impellers as close to the gear end headplate as possible and check the clearance between impellers and gear end headplate for agreement with Table 6 Adjust shimming on the gear end as required With unit securely fastened down use a dial indicator to measure the impeller float Again push the impeller to one end of the cylinder With indicator firmly mounted place contact point on the end of the shaft just pushed and set dial on zero Force the impeller to the opposite end toward indicator Indicator reading will be a measurement of the impeller float Repeat process on second impeller and compare float to Table 6 Adjust shimming at bearing clamp plates to obtain both float and end clearances specified in Table 6 Finally after clearances and float have been corrected and checked remove the gear end c
59. ent the possibility of personal injury or property damage turn off electrical power and depressurize switch unit before inspection or removal IMPORTANT Switch is not field repairable The switch must be returned to the factory Automatic Switch Company Florham Park New Jersey or serviced only by an authorized factory representative Address all service inquiries to Automatic Switch Company 50 60 Hanover Road Florham Park New Jersey 07932 Valve Service Department The only maintenance which may be performed on the switch is changing the setting of the adjusting nuts and replacement of the transducer unit Replacement of transducer should be done only if external leakage is evident Preventive Maintenance While in service operate the switch cycle between desired signals at least once a month to insure proper operation If necessary electrical wiring and pipe connection should be made so that switch can be test operated without affecting other equipment e Periodic inspection of the switch external surfaces only should be carried out Switch should be kept clean and free from paint foreign matter corrosion icing and freezing conditions Keep the medium entering the transducer as free as possible from dirt and foreign material Causes of Improper Operation Switch will not actuate or actuates and reactuates undesirable Incorrect Electrical Connection Check leads to switch Be sure they are properly connected Sw
60. es for jack screws in the drive end headplates Remove dowel pins and all capscrews holding headplate to cylinder and foot on the drive end Support unit under gear end cylinder flange with the shafts vertical Using soft metal block against gear end shafts push them out of gear end headplate For 2 1 2 and 3 1 2 gear diameter units support the drive end headplate on the underside and using soft metal block against drive end shafts push them out of drive end headplate For 4 6 amp 7 gear diameter units from the gear end using a wood or soft metal block against the ends of the shafts drive them out of the head plate If they are to be reused protect them from damage in this operation If blower interior surfaces need cleaning it may be advisable to separate the gear end headplate from the cylinder Use the same general procedure as employed at the drive end Working from the back flat face of each head plate push or tap out the bearings and seals Use a round bar or tube that will pass through the shaft clearance holes in the headplates All lip seals will be damaged during removal and must be replaced Clean bearing and seal pockets in headplates and remove burrs or rough edges Apply a thin coating of sealant on seal O D Press new seals 27 into gear end headplate using a round tube or 12 13 14 bar with recessed end that will bear on the outer metal edge of seal enclosure Seal lip should po
61. ever for tightening Use wrenching flats provided at base of transducer for tightening Capillary and Bulb The capillary and bulb remote temperature transducers are provided with a length of capillary and a 3 8 diameter sensing bulb CAUTION Do not bend capillary at sharp angles For proper operation be sure sensing bulb is completely immersed in fluid and not in contact with heating element or anything that would directly affect the temperature of the fluid being sensed Thermal Well Optional Feature A thermal well may be used for capillary and bulb remote or direct probe local temperature transducers The thermal well affords protection for the sensing bulb and allows removal of the sensing bulb while maintaining a pressure tight vessel When installing sensing bulb in thermal well be sure that it is fully inserted Where a thermal well already exists jam nuts may be obtained to adapt the capillary and bulb to the existing thermal well The existing thermal well must be for a 3 8 diameter sensing bulb Union Connector Optional Feature A union connector will allow direct mounting of the sensing bulb in the fluid being controlled Install union into piping connection before tightening union onto bulb For maximum performance the bulb should be inserted in the union connection so that the end of the sensing bulb is even with the end of the union connector nut Do not apply excessive torque when tightening union connecto
62. for tightness 3 Check belts for proper tightness 4 Zero out pressure or vacuum gauge 5 Set pressure on pressure vacuum switch to correct setting Lubrication CAMCORP uses positive displacement blowers from several manufacturers General lubrication information is given in the Maintenance Section for specific information on your positive displacement blower see the manufacturers manual included with this manual CAUTION All blowers are shipped dry from the factory Do not attempt to run the blower before following proper lubrication instructions as permanent damage to the gears bearings and seals will occur 4 Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com LOCKOUT TAGOUT BEFORE PRE STARTUP CHECK PRE START UP CHECK LIST A Check alignment of the drive and tension of the belts Make sure that the blower and all conveying lines are free of foreign material Check pressure relief valve to be sure they are unrestricted D Check that the blower has been properly lubricated according to the manufacturers insert E Check the breather filters on the blower for proper installation Turn the blower over by hand to be sure there is no binding CAUTION At this time replace all guards and covers making sure they are securely in place before operating the unit Never attempt to perform any maintenance on the air pump drive or conveying system while pump is in operation
63. gearbox and bearing reservoirs should be customary Complete oil change schedules are discussed under LUBRICATION Driver lubrication practices should be in accordance with the manufacturer s instructions If direct connected to the blower through a lubricated type coupling the coupling should be checked and greased each time blower oil is changed This will help reduce wear and prevent unnecessary vibration In a belted drive system check belt tension periodically and inspect for frayed or cracked belts In a new and properly installed unit there is no contact between the two impellers or between the impellers and cylinder or headplates Wear is confined to the bearings which support and locate the shafts the oil seals and the timing gears All are lubricated and wear should be minimal if clean oil of the correct grade is always used Seals are subject to deterioration as well as wear and may require replacement at varying periods Shaft bearings are designed for optimum life under average conditions with proper lubrication and are critical to the service life of the blower Gradual bearing wear may allow a shaft position to change slightly until rubbing develops between impeller and casing This will cause spot heating which can be detected by observing these surfaces Sudden bearing failure is usually more serious Since the shaft and impeller are no longer supported and properly located extensive general damage to the blower
64. ght gauge Item 37 or the overflow plug Initial filling of the sumps should be accomplished with the blower not operating in order to obtain the correct oil level Approximate oil quantities required for blowers of the various models and configurations are listed in Table 3 Use a good grade of industrial type non deter gent rust inhibiting anti foaming oil and of correct viscosity per Table 2 ROOTS synthetic oil ROOTS P N 813 106 is highly recommended The oil level should not fall below the middle of the site gauge when the blower is idle It may rise on the gauge during operation to an extent depending somewhat on oil temperature and blower speed Proper lubrication is usually the most important single consideration in obtaining maximum service life and satisfactory operation from the unit Unless operating conditions are quite severe a weekly check of oil level and necessary addition of lubricant should be suffi cient During the first week of operation check the oil levels in the oil sumps about once a day and watch for leaks Replenish as necessary Thereafter an occasional check should be sufficient It is recommended that the oil be changed after initial 100 hours of opera tion Frequent oil changing is not necessary unless the blower is operated in a very dusty location Normal life expectancy of petroleum based oils is about 2000 hours with an oil temperature of about 200 F 93 C As the oil temperature incr
65. haft Location f Inlet amp disch Dia 2 513 50 975 375 1 10NPT 24 5 13 700 1175 375 i 20 125 1 25 175 7 25 7 63 1213 5 00 850 500 E 20NPT 175 7 25 1000 1463 5 00 850 500 4 25NPT 175 800 7 25 13 00 625 15NPT 20 8 8 2181818 8 5 8 47 800 15 1763 625 1025 625 15 06 1050 850 1363 85 i 200 53 1050 838 1538 65 15 675 1738 1188 1025 1725 875 1125 250 125 25NPT 250 56 1050 1 00 1800 625 15 675 17 38 1225 1 0 17 25 875 1125 250 125 40 250 5 15 140 65 1 04 1000 1838 875 1475 875 2163 15 13 1275 1975 1175 135 312 156 30NPT 300 TLOO 1300 2138 875 1475 875 2163 15 13 1275 1975 1 5 135 312 156 50NPT 300 615 1L00 2000 2838 875 1475 875 2163 1625 1500 1975 1 5 1375 312 156 60 300 uae 1675 75 2555 no eso veo 225 S 12K84 8 8188 BASIC BLOWER DESCRIPTION Universal RAI blowers are heavy duty rotary blowers designed with detachable rugged steel mounting feet which permit easy in field adaptability to either vertical or horizontal installation requirements Because of the detachable mounting feet these units can be easily adapted to any
66. he intake or inline filter every 40 hours or more often if dust conditions are severe The filter element is washable using luke warm water with mild detergent D Check the drive belts for tension after the first 24 hours of operations and every 100 hours thereafter Sheaves and belts should be inspected every 200 hours E Silencers should be inspected periodically for 1 being plugged 2 corrosion 3 oil coating discharge silencers and for any deterioration 7 Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com TROUBLESHOOTING POSITIVE DISPLACEMENT ROTARY Symptom Noisiness BLOWERS Possible Causes Rotor to Rotor Contact Failing Bearing s Failing Gears Failing Lubricated Coupling or Joint Loose Attached Hardware Air Leakage Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com Possible Sources Rust Build up or Rotors Rotors Our of Time Excessive Pressure Ratio Failed Bearings s Failed Gears Faulty Installation Non spec Oil Contaminated Oil Insufficient Oil Improperly Mounted Sheave Over tightened Belts Insufficient Backlash Non spec Oil Contaminated Oil Insufficient Oil Sever Torsional Vibration Non spec Grease Contaminated Grease Insufficient Grease Belt Guard Pump Mounting Bracket Frame Members In Out Piping Supports Improper Relief Valve Setting Blown Gaskets Loose Piping Joints Symptom Poor Perfor
67. imits for pressure temperature and speed are specified in TABLE 1 for various models amp sizes of blowers amp exhausters These limits apply to all units of normal construction when operated under standard atmospheric conditions Be sure to arrange connections or taps for thermometers and pressure or vacuum gauges at or near the inlet and discharge connections of the unit These along with a good tachometer will enable periodic checks of operating conditions PRESSURE The pressure rise between inlet and discharge must not exceed the figure listed for the specific unit frame size concerned Also in any system where the unit inlet is at a positive pressure above atmosphere a maximum case rating of 25 PSI gauge 1725 mbar should not be exceeded without first consulting the ROOTS Never should the maximum allowable differential pressure be exceeded On vacuum service with the discharge to atmospheric pressure the inlet suction or vacuum must not be greater than values listed for the specific frame size TEMPERATURE Blower exhauster frame sizes are approved only for installations where the following temperature limitations can be maintained in service Measured temperature rise must not exceed listed values when the inlet is at ambient temperature Ambient is considered as the general temperature of the space around the unit This is not outdoor temperature unless the unit is installed outdoors If inlet temperature is
68. int toward the driving tool Seals to be flush without board bore face Apply a light coat of oil or grease to the seal lips In a similar fashion install lip seals into the drive end headplate Place cylinder on a flat surface Assemble gear end headplate to cylinder after checking flange punch marks Drive in the two locating dowel pins before tightening flange screws Also install gear end foot using the same longer cap screws 32 and washers 41 6 amp 7 UNIVERSAL blower install both gear end feet Place the assembly horizontally on steel blocks with gear end headplate on bottom The height of the blocks should be sufficient to clear gear end shaft extensions Assemble impellers into the cylinder with the drive shaft longer shaft in same location as in original assembly Before starting the shafts through the headplate holes make sure shaft ends have no sharp or rough edges to damage seal lips Position impellers at 90910 each other in the cylinder using lobe and waist match marks if original impellers are being re installed Install drive end headplate and feet in same manner as gear end It is recommended that new bearings be used for rebuild Apply thin film of machine oil on the shaft bearing fit bearing D headplate bearing bore Install drive end bearings into headplate Use a tube with flanged end that will contact both bearing faces simultaneously Refer to Assembly Drawing for p
69. ints around the coupling When a unit is BELT DRIVEN the proper selection of sheave diameters will result in the required unit speed This flexibility can lead to operating temperature prob lems caused by unit speed being too low Make sure the drive speed selected is within the allowable range for the specific unit size as specified under Table 1 Belt drive arrangements usually employ two or more V belts running in grooved sheaves Installation of the driver is less critical than for direct coupling but its shaft must be level and parallel with the unit shaft The driver should be mounted on the inlet side of a vertical unit horizontal piping and on the side nearest to the shaft on a horizontal unit The driver must also be mounted on an adjustable base to permit installing adjusting and removing the V belts To position the driver correctly both sheaves need to be mounted on their shafts and the nominal shaft center distance known for the belt lengths to be used Install the unit sheave so that its inner hub face is not more than 1 8 inch 8mm from the drive end cover See page 18 for minimum sheave diameter and maximum sheave width The shaft fit should be such that the sheave can be worked into place by hand or by very light tapping A tight or driving fit can damage a bearing and may cause internal unit damage by forcing the impeller out of its normal operating position A loose fit or wobbly sheave will cause vibration and
70. itch is marked NO for Normally Open NC for Normally Closed and C for Common Faulty Control Circuit Check electrical power supply to switch Check for loose or blown fuses open circuited or grounded wires loose connections at terminal block or switch See nameplate for electrical rating and range Incorrect Adjustment Check adjustment nuts for proper setting Refer to adjustment instructions External Leakage Check to see that bolts 4 holding transducer to pressure switch are properly torqued to 80 10 in lbs 9 0 1 1 Nm If bolts are tight and leakage is still evident replace transducer Refer to paragraph on Assembly of Switch Unit and Transducer Unit Excessive Vibration or Surges Causing Switch to Actuate and Reactuate Check for fluctuations in system and install pressure surge suppressor Check switch mounting and be sure there is no excessive vibration Incorrect Pressure Check pressure in system with suitable pressure gage Pressure must be within range specified on nameplate Incorrect Temperature Check temperature in system with suitable thermometer Temperature must be within range specified on nameplate Check location of capillary and bulb for incorrect mounting Refer to paragraphs on Installation of Temperature Transducers If the operation of the switch cannot be corrected by the above means the entire switch unit should be replaced or an authorized factory representative consulted FOR
71. ities Overfilled Excessive Pressure Ratio Excessive Pump Speed Line Voltage Drop Air Density Increase Loose Electrical Connections Foreign Material in Air Box Unusually High Ambient Temperature Underrated Heater Strips Clogged Filter Element Collapsed Inlet Hose Clogged Dust Vent Filter Undersized Dust Vent Filter Clogged Diffusion Pads Faulty Check Plate Improperly Installed Check Plate Wrong Sheave Set Wrong Motor Speed Slipping Belts Phone 913 831 0740 Fax 913 831 9271 Pressure and vacuum switches contain one or two single pole double throw switches rated continuous inductive for 10 amps at 125 or 250 volts or 3 amps at 480 volts The installation and use of this electrical apparatus must be in accordance with the national electrical code and any other applicable local codes and ordinances Standard motors supplied by CAMCORP will be 230 460 volt 3 phase 60 cycle and control circuits will be 110 volt single phase 60 cycle Pressure or Vacuum Switch Adjustments Turn adjustment screw clockwise to lower actuation point 11 Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com 0 rotary positive blowers exhausters B 12X95 April 2002 Versatile reliable ROOTS Univers Remarkably adaptable You can mount the Universal RAI blower upside down or rightside up with vertical or horizontal flow and with the drive shaft rotating in either directio
72. ive action Check with CAMCORP for expected operating pressure This may involve stopping the infeed or material to the system to allow it a certain time to clear itself or it may be as simple as triggering an alarm to alert an operation to the condition Caution must be taken to be sure that any steps initiated by such an upset condition does not create a problem or even a hazard elsewhere in your process For example your upstream equipment may need to be shut down in a very specific sequence In any case you need to analyze the affect on your complete process before establishing the actions initiated by an upset condition 3 Inc Phone 913 831 0740 Fax 913 831 9271 www camcorpinc com INSTALLATION CAMCORP s positive displacement blower package consists of a positive displacement blower a vertical or horizontal frame assembly a motor take up table or motor slide rails V belt drive and belt guard an air intake or inline filter intake and discharge silencer a pressure or vacuum relief valve preset at the maximum pressure or vacuum rating of the blower flexible connections a check valve pressure blower assemblies only pressure vacuum gauge and pressure or vacuum switch Vacuum blower package does not include an inlet silencer as a standard offering Assembly may be accomplished through the following 1 Locate and anchor the blower base assembly in its permanent location 2 Check all bolted connections
73. l Horizontal 22 24 RAM J amp Sump Capacities Orientation Gearbox Drive End Oz Liters Oz Liters 400 Horizontal 36 1 06 19 56 400 18 52 9 27 600 Horizontal 95 2 81 50 600 Vertical 55 1 63 28 TABLE 4 SUGGESTED BEARING GREASING INTERVALS Speed In RPM Operating Hours Per Day 8 16 Greasing Intervals in Weeks 750 1000 4 1000 1500 1500 2000 2000 2500 2500 3000 3000 and up 23 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc TABLE 5 NORMAL CLEARANCES FOR UNIVERSAL AND URAI J URAI G BLOWERS INcHES Impeller Ends Cylinder Impeller Total Drive End Minimum Gear End Minimum Inlet amp Discharge Center Center Fronts Backs 006 010 006 010 003 08 004 005 10 13 004 006 10 15 002 003 05 08 002 003 05 08 007 01 18 25 006 011 006 011 006 011 008 011 008 013 008 013 004 006 10 15 004 006 10 15 005 007 005 007 005 007 13 18 13 18 13 18 002 003 05 08 002 003 003 004 003 004 003 004 05 08 08 10 08 10 8 10 009 012 012 015 012 015 18 25 007 01 18 25 01 012 2
74. l develop Continuation of this tooth wear will eventually produce impeller contacts knocking and from this point serious damage will be unavoidable if blower operation is continued A similar situation can be produced suddenly by gear tooth fracture which is usually brought on by sustained overloading or momentary shock loads Problems may also develop from causes other than internal parts failure Operating clearances within a blower are only few thousandths of an inch This makes it possible for impeller interferences or casing rubs to result from shifts in the blower mounting or from changes in piping support If this type of trouble is experienced and the blower is found to be clean try removing mounting strains Loosen blower mounting bolts and reset the leveling and drive alignment Then tighten mounting again and make sure that all piping meets blower connections accurately and squarely Foreign materials sucked into the blower will also cause trouble which can only be cured by disconnect ing the piping and thoroughly cleaning the blower interior A wide range of causes amp solutions for operating troubles are covered in the TROUBLE SHOOTING CHECKLIST The remedies suggested should be performed by qualified mechanics with a good background using procedures detailed in this manual Major repairs generally are to be considered beyond the scope of maintenance and should be referred to ROOTS Warranty failures should not
75. lamping places 54 and install wavy spring washers 29 and reinstall shims 10 and clamping plates 54 Be sure oil feed grooves are up and toward bearings Installing drive gear 4 Be sure shafts and gear bores are clean and free of scratches Oil gear nut threads lightly Place hardwood wedges as shown in Figure 8 Install gear 4 and nut 31 so match mark at the tooth is at the line of engagement Tighten the drive gear to the torque given below Blower assembly must be fastened down for torquing operation Left side discharge machine Installing driven gear 14 Insert a long metal feeler gauge between the impellers lobes at the fronts as shown in Table 6 Feeler gauge thickness to be a middle value from Table 6 for fronts 13 Right side discharge machine Installing driven gear 4 Insert a long metal feeler gauge between the impellers lobes at the backs Feeler gauge thickness to be minimum value from Table 6 for backs SERIES BLOWER GEAR Nur TORQUE Frame Size Torque Ib ft 400 630 kg m 56 88 404 406 409 412 418 616 624 SERIES BLOWER SLINGER SCREW TORQUE Frame Size 404 406 409 412 418 616 624 Align the gear so the tooth match marks agree with the drive gear then install slinger 46 and nuts 31 Tighten lightly with a small wrench then check front and back clearances against Table 6 for each 45 position Both f
76. lectrical overload devices are installed and workable LL Open the manual unloading valve in the discharge air line If a valve is in the inlet piping be sure it is open Bump blower a few revolutions with driver to check that direction of rotation agrees with arrow near blower shaft and that both coast freely to a stop After the preceding points are cleared blower is ready for trial operation under no load conditions The following procedure is suggested to cover this initial operation test period a Start blower let it accelerate to full speed then shut off Listen for knocking sounds both with power on and as speed slows down b Repeat above but let blower run 2 or 3 minutes Check for noises such as knocking sounds c Operate blower for about 10 minutes unloaded Check oil levels Observe cylinder and headplate surfaces for development of hot spots such as burned paint indicating impeller rubs Be aware of any noticeable increase in vibration Assuming that all trials have been satisfactory or that necessary corrections have been made the blower should now have a final check run of at least one hour under normal operating conditions After blower is restarted gradually close the discharge unloading valve to apply working pressure At this point it is recommended that a good pressure gauge or manometer be connected into the discharge line if not already provided and that thermometers be in both i
77. linger G E Oil Leader L S Oil Leader R S Brg Clamp Plate Screw Cap Butt HD Lifting Lug Pin Spring Screw Cap Hex HD Whispair Spring Lock 3 8M Shims Brg Screw Cap Hex HD Blower Foot RH Blower Foot LH For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 Elb Pipe Black Plug Pipe Scr Cap BH Ball Spherical BSHG RDCG Washer Plain Flat Washer Plain Flat Washer 32 NOTES CONTACT LIST CUSTOMER SERVICE Dresser ROOTS 2135 Hwy 6 South Houston TX 77077 Toll Free Hot Line 1 877 363 ROOT S 7668 Toll Free Fax 1 877 357 7238 Local Fax 281 966 4309 ROOTS Factory Service amp Repair Center 11611B Tanner RD Houston TX 77041 Toll Free 1 800 866 6182 Local Phone 713 896 4810 Local Fax 713 896 4927 Service amp Warranty Toll Free 1 800 866 6182 Local Phone 832 467 4614 Local Fax 713 896 4927 Dresser Inc Dresser ROOTS Dresser ROOTS Connersville Dresser ROOTS Holmes Operation DRESSER 2135 Hwy 6 South 900 West Mount Street PO Box B7 Houston TX 77077 Connersville IN 47331 Off St Andrews Rd Roots PH 281 966 4700 PH 765 827 9200 Turnbridge Huddersfield FX 281 966 4309 FX 765 827 9266 England HD1 688 Toll Free 1 877 363 ROOT S PH 44 1484 422222 IRB 180 102 FX 44 1484 422668 Rev
78. lower while it is operating or while subject to accidental starting Protect external moving parts with adequate guards Disconnect power before doing any work and avoid bypassing or rendering inoperative any safety or protective devices If blower is operated with piping disconnected place a strong coarse screen over the inlet and avoid standing in the discharge air stream CAUTION Never cover the blower inlet with your hand or other part of body OPERATING LIMITATIONS Stay clear of open inlet piping suction area of pressure blowers and the open discharge blast from vacuum blowers Stay clear of the blast from pressure relief valves and the suction area of vacuum relief valves Use proper care and good procedures in handling lifting installing operating and maintaining the equipment Casing pressure must not exceed 25 PSI 1725 mbar gauge Do not pressurize vented cavities from an external source nor restrict the vents without first consulting ROOTS Do not use air blowers on explosive or hazardous gases Other potential hazards to safety may also be associated with operation of this equipment All personnel working in or passing through the area should be trained to exercise adequate general safety precautions ROOTS blower or exhauster must be operated within certain approved limiting conditions to enable continued satisfactory performance Warranty is contingent on such operation Maximum l
79. ls synthetic lubricants are recommended Check suitability to gases before using Oils 1 ROOTS GT Synthetic Lubricant ROOTS P N 13 106 001 1 one quart ISO 220 2 Mobil SHC 600 Series Lubricating Oils Grease ROOTS Synthetic Grease 2 ROOTS P N T20 019 001 1 one 14 oz tube 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc MAINTENANCE amp REPLACEMENTS RAM SERIES BLOWERS A good program of consistent inspection and mainte nance is the most reliable method of minimizing repairs to a blower A simple record of services and dates will help keep this work on a regular schedule Basic service needs are Lubrication Checking for hot spots Checking for increases or changes in vibration and noise Recording of operating pressures and temperatures Above all a blower must be operated within its specified rating limits to obtain satisfactory service life A newly installed blower should be checked often during the first month of full time operation Attention thereafter may be less frequent assuming satisfactory performance Lubrication is normally the most impor tant consideration and weekly checks of lubricant levels in the gearbox and bearing reservoirs should be customary Complete oil change schedules are discussed under LUBRICATION Driver lubrication pr
80. m Because of the tight clearances used in the design and manufacture of the PD blowers they require filtered intake air Proper maintenance of the intake filter will help insure a long service life for your blower We recommend you give consideration to building certain precautions into your system Due to unforeseen circumstances your system may at some point experience an upset condition By allowing for this when setting up your system you may minimize the affect of such an occurrence Three major areas should be considered the positive displacement blower the motor and the integrity of the system controls Provided as standard equipment on all of our blower packages is a mechanical relief valve which is factory set at or below the pressure or vacuum limit of the specific blower This protects the blower from overheating because flow is decreasing if a line plugs or valve closes at the wrong time This type of blower is not designed to run at zero airflow A properly sized and installed motor starter provides protection for your motor Hire a qualified electrician to design and install the electrical service to your system The integrity of the controls for your system can usually best be maintained during an upset condition by proper use of a pressure or vacuum switch A pressure vacuum switch set two to three PSI Hg above the expected operating pressure of your system will allow a high pressure or vacuum signal to initiate a preventat
81. mance Possible Causes Belt Flutter Restricted Inlet Down Stream Restriction Erroneous Pressure or Vacuum Indication Air Leakage Insufficient Rotor Speed Excessive Rotor Clearances Change in Conveyed Material Inc www camcorpinc com Possible Sources Insufficient Static Tension Sheave Misalignment Sever Torsional Vibration Clogged Filter Element Collapsed Inlet Hose Clogged Dust Filter Undersized Dust Filter Faulty Check Plate Improperly Installed Check Plate Loose Gauge Connection Gauge Movement Damaged Gauge Inaccurately Calibrated Improper Relief Valve Setting Blown Gaskets Loose Piping Joints Wrong Sheave Set Wrong Motor Speed Slipping Belts Abrasive Wear of Rotor Surfaces Rotor Lag Timed Material More Difficult to Fluidize Material of Higher Density Moisture Content of Material Too High Phone 913 831 0740 Fax 913 831 9271 Symptom Leaking Oil Chronic Fuse Blowing or Circuit Breaking Overheating Possible Causes Failed Oil Seals End Cover Seams Not Tight Oil Foaming Excessive Motor Amperage Underrated Fuses Premature Heater Strip Actuation Excessive Pressure Ratio Insufficient Rotor Speed 10 Inc www camcorpinc com Possible Sources Foreign Material in Seal Bores Faulty Installation Non spec Oil Contaminated Oil Overheated Rotor Shafts Bolts Loose Gaskets Torn Non spec Oil Oil Cav
82. matic vent Such use may cause the discharge pressure to become excessive and can also result in failure of the valve itself If blower capacity appears to be too low refer to the TROUBLESHOOTING CHECKLIST Vibration Assessment Criteria With measurements taken at the bearing locations on the housings see chart below for an appropriate assessment guide for rotary lobe blowers rigidly mounted on stiff foundations In general blower vibration levels should be monitored on a regular basis and the vibration trend observed for progressive or sudden change in level If such a change occurs the cause should be determined through spectral analysis As shown on the chart below the level of all pass vibration will determine the need to measure discrete frequency vibration levels and the action required All Pass Vibration in sec Discrete Frequency Vibration in sec Action 0 45 or less Greater than 0 45 but 1 0 or less Greater than 1 0 N R 0 45 or less any frequency Greater than 0 45 any frequency Less than 1 0 Greater than 1 0 Approved Approved ROOTS Approval Required ROOTS Approval Required ROOTS Approval Required 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc OPERATING CHARACTERISTICS ROOTS rotary blowers and exhausters as covered in
83. n With 17 frame sizes to choose from you have the perfect blower to fit your application with little or no modification More performance too Now the Universal RAI line up has a broader range and is more rugged than ever with flows to 2460 CFM vacuums to 16 Hg and pressures to 15 PSIG You get a blower that not only fits but gives you the best performance in its class Greater pressi with proven Copyright 2002 Dresser Inc All rights reserved ROOTS is a trademark of Dresser Inc Universal RAI and URAI are registered Trademarks of Dresser Inc All information subject to change without notice RAI blower FITS your application Fast delivery Lowcost 6 Thanks to over 45 stocking centers The ROOTS Universal RAI line of throughout North America you ll get blowers is designed with the latest on time delivery You can schedule engineering technology and built using production reduce your inventory the most modern manufacturing anticipate your costs and meet your processes This results in cost savings deadlines we can pass along to you This genuine ROOTS blower can actually cost less Better service than ordinary competitive units With nearly 100 sales and distribution locations only ROOTS can offer the Built in reliability kind of responsive service and Each Universal RAI is precision applications assistance that the machined on the latest CNC industry s largest service
84. nection to prevent anything being drawn into the unit while it is operating and avoid standing in line with the discharge opening Put oil in the sumps per instructions under LUBRICATION Piping Before connecting piping remove any remaining anti rust compound from Unit connections Clean pipe should be no smaller than unit connections In addition make sure it is free of scale cuttings weld beads or foreign material of any kind To further guard against damage to the unit especially when an inlet filter is not used install a substantial screen of 16 mesh backed with hardware cloth at or near the inlet connections Make provisions to clean this screen of collected debris after a few hours of operation It should be removed when its usefulness has ended as the wire will eventually deteriorate and small pieces going into the unit may cause serious damage Pipe flanges or male threads must meet the unit connections accurately and squarely DO NOT attempt to correct misalignment by springing or cramping the pipe In most cases this will distort the unit casing and cause impeller rubbing In severe cases it can prevent operation or result in a broken drive shaft For similar reasons piping should be supported near the unit to eliminate dead weight strains Also if pipe expansion is likely to occur from temperature change installation of flexible connectors or expansion joints is advisable Figure 2 represents an installation with all a
85. ned and is to be treated as a unit for leveling purposes Satisfactory installation can be obtained by setting the baseplate on a concrete slab that is rigid and free of vibration and leveling the top of the base carefully in two directions so that it is free of twist The slab must be provided with suitable anchor bolts The use of grouting under and partly inside the leveled and shimmed base is recommended It is possible for a base mounted assembly to become twisted during shipment thus disturbing the original alignment For this reason make the following checks after the base has been leveled and bolted down Disconnect the drive and rotate the unit shaft by hand It should turn freely at all points Loosen the unit foot hold down screws and determine whether all feet are evenly in contact with the base If not insert shims as required and again check for free impeller rotation Finally if unit is direct coupled to the driver check shaft and coupling alignment carefully and make any necessary corrections In planning the installation and before setting the unit consider how piping arrangements are dictated by the unit design and assembly Drive shaft rotation must be established accordingly and is indicated by an arrow near the shaft Typical arrangement on vertical units has the drive shaft at the top with counterclockwise rotation and discharge to the left Horizontal units are typically arranged with the drive shaft at the left
86. network equipment assuring close tolerances provides between the impellers casing and headplates to minimize slippage of air Iron clad warranty improving efficiency and reliability ROOTS exclusive Figure 8 gearbox design improves oil distribution and lengthens bearing and gear life Oversize anti friction bearings support the shaft and on the drive cylindrical roller bearings will resist V belt pull and extend service life ROOTS is the leader in warranties too the first to introduce a full 2 year warranty We ll protect you or your customer for a full 24 months after start up not to exceed 30 months after shipment sure and flow reliability Copyright 2002 Dresser Inc All rights reserved ROOTS is a trademark of Dresser Inc Universal RAI and URAI are registered Trademarks of Dresser Inc All information subject to change without notice You get increased performance through ROOTS extensive improvement program and life testing Here s how 1 Exclusive gearbox design Figure 8 gearbox actually improves oil distribution for longer gear and bearing life with smoother operation 2 Taper mounted timing gears Carburized and ground alloy steel gears are precision machined and taper fitted to alloy steel shafts eliminating the need for unreliable timing pins 3 Original ROOTS impeller design Dynamically balanced ROOTS impellers are center timed to allow either
87. nlet and discharge lines Readings from these instruments will show whether pressure or temperature ratings of the blower are being exceeded During the final run check operating conditions frequently and observe the oil levels at reasonable intervals If excessive noise or local heating develops shut down immediately and determine the cause If either pressure rise or temperature rise across the blower exceeds the limit specified in this manual shut down and investigate conditions in the piping system Refer to the TROUBLESHOOTING CHECKLIST for suggestions on various problems that may appear The blower should now be ready for continuous duty operation at full load During the first few days make periodic checks to determine whether all conditions remain steady or at least acceptable This may be particularly important if the blower is supplying air to a process system where conditions can vary At the first opportunity stop the blower and clean the temporary inlet protective screen If no appreciable amount of debris has collected the screen may be removed See comments under INSTALLATION At this same time verify leveling coupling alignment or belt tension and mounting bolt tightness Should operating experience prove that blower capacity is a little too high for the actual air requirements a small excess may be blown off continuously through the manual unloading or vent valve Never rely on the pressure relief valve as an auto
88. nstall it with carbon facing up in the seal bore with a seal driver that is guided by the bearing bore Drive the seal flush with front face of the seal bore Repeat this procedure for all four seals Apply a light coating of lubricating oil on the sealing surface Protect sealing faces during assembly from any damage 2 Apply teflon based sealant on the cylinder flanges before installing head plates Continue the assembly procedure as outlined up to bearing installation Before installation of the bearings the seal mating rings need to be installed Apply light film of lubricating oil on mating ring o rings and sealing faces Slide mating rings on the shaft and up to carbon faces making sure that no damage to the o rings occur during installation break sharp shaft corners to avoid damage to the o rings during initial preparation Install bearings all the way against the back bearing bore shoulders 3 Complete the rest of the assembly Make sure all plugged holes are sealed with teflon thread liquid sealant Note On 6 gear diameter units shims 44 are used between the bearing clamp plates and the head plate on the gear end Also on size 32 and 42 washers with embedded o rings are used on the center head plate to cylinder bolts After the assembly is completed plug the blower inlet and discharge connections and run static soap bubble Leak test to assure leak free assembly For satisfactory operation of mechanical sea
89. oann 31 Do THESE THINGS TO GET THE Most FRom Your ROOTS BLOWER Check shipment for damage If found file claim with carrier and notify ROOTS LL Unpack shipment carefully and check contents against Packing List Notify ROOTS if a shortage appears LL Store in a clean dry location until ready for installation Lift by methods discussed under INSTALLATION to avoid straining or distorting the equipment Keep covers on all openings Protect against weather and corrosion if outdoor storage is necessary 0 Read OPERATING LIMITATIONS INSTALLATION sections in this manual and plan the complete installation Provide for adequate safeguards against accidents to persons working on or near the equipment during both installation and operation See SAFETY PRECAUTIONS LL Install all equipment correctly Foundation design must be adequate and piping carefully done Use recommended accessories for operating protection 0 Make sure both driving and driven equipment is correctly lubricated before start up See LUBRICATION 0 Read starting check points under OPERATION Run equipment briefly to check for installation errors and make corrections Follow with a trial run under normal operating conditions IRB 180 102 Rev 12 02 event of trouble during installation or operation do not attempt repairs of ROOTS furnished equipment Notify ROOTS giving all nameplate information plus an outline of operating
90. of four drive shaft positions right hand left hand bottom or top The compact sturdy design is engineered for continuous service when operated in accordance with speed and pressure ratings The basic model consists of a cast iron casing carburized and ground alloy steel spur timing gears secured to steel shafts with a taper mounting and locknut and cast iron involute impellers Oversized antifriction bearings are used with a cylindrical roller bearing at the drive shaft to withstand V belt pull The Universal RAI features thrust control with splash oil lube on the gear end and grease lube on the drive end After standard tests the unit is sprayed with a protective paint and boxed or placed on skids Available accessories include driver relief valve inlet and discharge silencer inlet filter check valve extended base V belt or flexible coupling and drive guards syeys 9915 8 ands lt 1520 pif eqoj ow 9 0 77 18 44 199 9915 1 9215 edid 9 S3AYNLVAA NOILONYLSNOO 10 10 pue 02 Jo eunsseJd 4 89 Jo 1 uo peseg
91. om the taper fits or damage injury may result Be sure that each gear is marked for return to the same shaft in the same angular position and that the gears have match marks for the teeth For this operation the impellers should be wedged as shown in Figure 8 Back off nuts 31 and slinger 46 The timing gears 4 have two 1 2 13 holes for pulling purposes Use a suitable puller Remove bearing clamp plates 54 by unscrewing capscrews 32 and removing lock washers Group the shims 10 the wavy spring washers 29 with each clamp plate and tag for ease of reassembly Remove the headplate remove all capscrews 23 holding the headplate to the cylinder Insert jacking screws into the four 4 threaded flange holes and turn them in evenly They headplate will separate from the cylinder The lip seals 27 and bearing outer race and rollers are removed with the headplate and can be pressed out later For RAM J WHISPAIR gas pump units The gear end headplate which is removed next requires a different approach from the drive end On this end the shafts are forced from the bearing bore by using a bar across the end of the shaft with threaded rods to the headplate Once the headplates are removed from the assembly the seal housings can be pressed or driven from 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered tra
92. osition of impellers to each other and maintain small but definite clearances This allows operation without lubrication inside the air casing Horizontal Gear End Drive Shaft on Left Drive Shaft on Right HORIZONTAL MOUNTING Copyright 2002 Dresser Inc All rights reserved Vertical air flow ROOTS is a trademark of Dresser Inc Universal RAI and URAI are registered Trademarks of Dresser Inc All information subject to change without notice Performance Specifications Universal Pressure Table Speed 2 PSI 4 PSI 5 PSI 6 PSI 7 PSI 10 PSI 11 PSI 12 PSI 13 PSI 14 PSI 15 PSI BHP 22 3600 46 0 8 41 13139 16 38 18136 21 322 28131 31129 33 5275 73 12168 19166 23 64 27 63 31 57 45156 49 59 42 1160 1 3600 8 83 33 3 8 5275 2 137 49 5 6 1160 2800 4 86 60184 65 81 76179 82 77 87 3600 i 5 122 77 120 84 117 9 8 115 105 113 11 2 1160 2800 s 7 120 8 0 118 87 3600 41170 10 3 167 11 2 1160 E 36 2800 3600 860 1 42 1760 62 5 0 60 5 5 3600 4 173 10 2 171 11 2 167 13 1 165 14 1 163 15 0 860 45 1760 2 9 133 9 6 3600 356 20 5 700 i 53 1760 3 16
93. oth sheaves In a direct coupled arrangement a variable speed motor or transmission is required or excess air may be blown off through a manually controlled unloading valve and silencer If returned to the blower inlet the air must be cooled to 100 38 C through a by pass arrangement to maintain acceptable blower temperatures Before making any change in blower capacity or operating conditions contact ROOTS for specific information applying to your particular blower In all cases operating conditions must be maintained within the approved range of pressures temperatures and speeds as stated under LIMITATIONS The air blower must not be used to handle liquids or solids as serious damage to the rotating parts may result FIGURE 1 F Low THROUGH A Basic RorARY LoBE BLOWER POSITION 1 POSITION 2 POSITION 3 For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 8 TROUBLESHOOTING Trouble Item Possible Cause Remedy No flow 1 Speed too low Check by tachometer and compare with published performance 2 Wrong rotation Compare actual rotation with Figure 1 or 2 Change driver if wrong 3 Obstruction in piping Check piping valves silencer to assure open flow path Low capacity 4 Speed too low See item 1 If belt drive check for slippage and readjust tension 5 Excessive pressure rise Check inlet vacuum and discharge pressure and compare with Published performance 6 Obstruc
94. ousing until traces of clean grease comes out of the relief fitting After a long shutdown it is recommended that the grease fittings be removed the old grease flushed out with kerosene or 10 lubricating oil drained thoroughly and bearings refilled with new grease Be sure grease relief fittings are reinstalled Grease should be added using a hand operated grease gun to the drive end bearings at varying time intervals depending on duty cycle and RPM Table 4 has been prepared as a general greasing schedule guide based on average operating conditions More frequent intervals may be necessary depending on the grease operating temperature and unusual circumstances ROOTS synthetic grease ROOTS P N T20019 is highly recommended LUBRICATION For Units with Splash Lubrication on Both Ends Bearings and oil seals are lubricated by the action of the timing gears or oil slingers which dip into the main oil sumps causing oil to splash directly on gears and into bearings and seals A drain port is provided below each bearing to prevent an excessive amount of oil in the bearings Seals located inboard of the bearings in each headplate effectively retain oil within the sumps Any small leakage that may occur should the seals wear passes into a cavity in each vented headplate and is drained downward Oil sumps on each end of the blower are filled by removing top vent plugs Item 21 and filling until oil reaches the middle of the oil level si
95. r nut Adjustment Signal Setting of Two Stage Fixed Deadband Switch When facing switch in the upright position the adjusting nut on the highest point controls the high signal setting The adjusting nut at the lowest point controls low signal setting Refer to Figure 3 To make adjustments a 1 4 wrench and a pressure or temperature gage within suitable range are required If electrical connection to line of final application of the switch is not desirable a battery powered test lamp ohmmeter may be used Pressure or temperature range scales may be used for initial signal settings These will be accurate within 5 Adjust switch until pointer is in the middle of the solid red line below the desired range For exact signal settings proceed as follows Adjustment Signal Setting of Normally Closed or Normally Open Switch Increasing Signal Refer to Figure 3 1 If the switch is in the line of final application when adjustment signal setting is made be sure switch can be test operated without affecting other equipment 2 On general purpose and watertight constructions remove switch cover 3 Turn high signal adjusting nut until high signal setting indictor is fully up Then turn low signal adjusting nut until low signal setting indicator is fully up Use a 1 4 wrench for adjusting nuts CAUTION Adjusting nut will turn easily until it hits a stop Do not over torque Over torquing may cause damage 4 Follow the
96. r the base flanges is required Arrange these slings so that no strains are placed on the unit casing or mounting feet or on any mounted accessory equipment DO NOT use the lifting lugs in the top of the unit headplates Before starting the installation remove plugs covers or seals from unit inlet and discharge connections and inspect the interior completely for foreign material If cleaning is required finish by washing the cylinder headplates and impeller thoroughly with a petroleum solvent Turn the drive shaft by hand to make sure that the impellers turn freely at all points Anti rust compound on the connection flanges and drive shaft extension may also be removed at this time with the same solvent Cover the flanges until ready to connect piping Mounting Care will pay dividends when arranging the unit mounting This is especially true when the unit is a bare shaft unit furnished without a baseplate The convenient procedure may be to mount such a unit directly on a floor or small concrete pad but this generally produces the least satisfactory results It definitely causes the most problems in leveling and alignment and may result in a Soft Foot condition Correct soft foot before operation to avoid unnecessary loading on the casing and bearings Direct use of building structural framing members is not recommended For blowers without a base it is recommended that a well anchored and carefully leveled steel or cast iron
97. rain re work piping alignment to remove excess strain Driver stops or 25 Impeller stuck Check for excessive hot spot headplate or cylinder will not start See item 10 Look for defective shaft bearing and or gear teeth 26 Scale sludge rust or Clean blower appropriately product build up Excessive breather 27 Broken seal Replace seals Blow by or excessive 28 Defective O ring Replace seals and O ring oil leakage to vent area 2002 Dresser Inc all rights reserved ROOTS RAM URAI and WHISPAIR are trademarks of Dresser Inc Dresser Design and Universal RAI are registered trademarks of Dresser Inc MAINTENANCE amp REPLACEMENTS UNIVERSAL RAI SERIES BLOWERS A good program of consistent inspection and mainte nance is the most reliable method of minimizing repairs to a blower A simple record of services and dates will help keep this work on a regular schedule Basic service needs are e Lubrication Checking for hot spots Checking for increases or changes in vibration and noise Recording of operating pressures and temperatures Above all a blower must be operated within its specified rating limits to obtain satisfactory service life A newly installed blower should be checked often during the first month of full time operation Attention thereafter may be less frequent assuming satisfactory performance Lubrication is normally the most impor tant consideration and weekly checks of lubricant levels in the
98. ring progress of the work In the following repair procedures numbers shown in brackets correspond to the Item numbers used in assembly drawings and parts lists It is recommended that the procedures be studied carefully and completely with frequent reference to the draw ings before starting work This will produce better efficiency through an understanding of what work is to be done and the order of doing it Before disassembly mark all parts so that they may be returned to original locations or relative positions Requirements for special tools will depend on the work to be done If impeller clearances and float are to be checked or re set a dial indicator and a set of long feeler gauges will be needed Work involving removal of the timing gears cannot be accomplished without a puller suitable Heat must be used during bearing and sleeve installation Design of ROOTS blower is simple and most repair operations are straightforward For this reason the following procedures are intended mainly to indicate a preferred work order and to call out points to be observed Where special operations are required detailed coverage is given DISASSEMBLY OF DRIVE END 1 Remove the sheave or coupling and key from the drive shaft File off any burrs or sharp edges along the keyway 2 Drain oil by removing drain plug 22 3 Remove the flange screws 75 Tap the drive end cover to loosen it then slide it along the shaft care
99. ronts should be about the same and backs should about equal and be within the specified range in Table 6 Adjust gear position if necessary then insert the corrected feeler gauge and wedges and use a torque wrench to tighten the gear nut to the torque specified above Remove wedges and rotate the drive shaft by hand to make sure there are no gear tight spots or impeller contacts CAUTION Keep fingers away from impeller end gears Install gearbox 3 with gasket 7 and tighten the capscrews 75 evenly to 10 ft Ibs 1 3 kg m Install drive end oil slinger 40 and capscrew 60 apply Locktite to threads and torque to value specified above Install drive end cover 5 and gasket 7 with drive lock pins 17 in place being careful not to dent or scratch drive shaft lip seal surface Tighten capscrews 75 evenly Check seal bore for concentricity with shaft using an indicator reposition drive lock pins if neces sary Install seal 33 with lip facing inward using care to avoid tearing or scratching seal on shaft keyway Use a pressing tool with clean square ends to insure cor rect positioning of the seal For hydrodynamic style seals the shaft rotation is critical for correct installation and proper sealing Match the directional arrow shown on the seal faces with the required shaft rotation An installation protective sleeve is required to protect seal lip during installation Install vent plug 21 in each headplate Repl
100. roper bearing depths NOTE Cylindrical drive bearing should be installed with inner race large shoulder facing outboard Place blower on its feet on a flat surface Loosen feet capscrews 32 and square up unit Re tighten capscrews 32 Clamp unit down to a solid base for further assembly Oil the gear end bearing fits as described previously Install 2 1 2 thru 5 blower gear end bearings flush with the headplate bearing shoulders using proper drivers On 6 amp 7 gear diameter units install thrust washer 29 in bearing bores then install gear end bearings so they protrude 1 16 1 6mm above headplate surface Install bearing clamp plates 34 On 6 amp 7 gear diameter units blower impeller end clearances are also to be set during this step Install clamp plates 34 with capscrews 31 making sure that the gap between the clamp plates and the headplate is even all around At the same time set end clearances per Table 5 Install gears and time impellers as in A For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 12 15 For setting end clearances on 2 1 2 thru 5 gear diameter units special tools thrust adjuster fork and thrust adjuster saddle are required Refer to Table 5 for installation of tools The flat side of the saddle rests against the bearing inner race and the flat side of the fork rests against the back side of the gear Install a shim
101. s see Form No P7051 for pressure transducer catalog numbers and construction materials then refer to chart below TRANSDUCER RATINGS CONSTRUCTION MATERIALS FLUID TEMPERATURE Buna N or Neoprene 4 F 20 C to 180 F 82 C VITON 4 F 20 C to 250 F 121 C 316 Stainless Steel 50 F 45 C to 300 F 149 C All Nylon Maximum 180 F 82 C All Nylon For Water Service Maximum 130 F 55 For stream service the fluid temperature with a pigtail siphon tube or condensate loop installed directly into the transducer will be below 180 F 82 C 9 Automatic Switch Co All Rights Reserved ASCO Valves Form No P7050R1 Assembly Of Switch And Transducer Units Refer to Figure 4 IMPORTANT The switch unit and transducer unit may be purchased as a complete assembly or as separate units If separate units are purchased refer to Form No P7051 for a complete listing of switch unit and transducer unit combinations Form No P7051 is provided to ensure that the proper switch unit is assembled to the proper transducer unit Pay careful attention to exploded view provided in Figure 4 for assembly of switch unit and transducer unit Proceed in the following manner CAUTION The third digit in the catalog number on both the switch unit and the transducer unit must be identical If not do not assemble to each other If the same proceed 1 Remove bolts 4 from base of switch unit
102. screw is torqued the puller will have a tendency to turn and contact teeth of the other gear To prevent this contact hold the puller corner nut with a wrench while torquing the set screw Once the gear is unseated remove the puller Remove gear nuts 17 and the gear 4 GEAR INSTALLATION Place impellers in correct position as previously marked Be sure shafts and gear bores are clean oil free and free of scratches Clean the shaft tapered fits Place hardwood wedges as shown in Table 5 Install drive gear 4 and gear nut 17 Tighten the drive gear nut to the torque given below Blower assembly must be fastened down for torquing operation 5 Installing driven gear 4 Insert a long metal feeler gauge between the impellers lobes at the fronts or backs as shown below Feeler gauge thickness to be a middle value from Table 5 for fronts and backs Install nut 17 Tighten lightly with a small wrench then check front and back clearances against Table 5 for each 45 position Both fronts and backs should be about the same and within the specified range in Table 5 Adjust gear position if necessary then insert the corrected feeler gauge and wedges and use a torque wrench to tighten the gear nut to the torque specified in below Remove wedges and rotate the drive shaft by hand to make sure there are no gear tight spots or impeller contacts CAUTION Keep fingers away from impellers and gears UNIVERAL RAI SERIES BLOWER Gear Nur
103. tion as corrosion protection will be quickly lost due to evaporation If there is to be an extended period between installa tion and start up the following steps should be taken to ensure corrosion protection 4 Coat internals of cylinder gearbox and drive end bearing reservoir with Nox Rust VCI 10 or equivalent Repeat once a year or as conditions may require Nox Rust VCI 10 is petroleum soluble and does not have to be removed before lubricating It may be obtained from Daubert Chemical Co 2000 Spring Rd Oak Brook Ill 60521 LL Paint shaft extension inlet and discharge flanges and all other exposed surfaces with Nox Rust X 110 or equivalent inlet discharge and vent openings It is not recommended that the unit be set in place piped to the system and allowed to remain idle for extended periods If any part is left open to the atmosphere the Nox Rust VCI 10 vapor will escape and lose its effectiveness 0 Protect units from excessive vibration during storage Rotate shaft three or four revolutions every two weeks 1 Prior to start up remove flange covers on both inlet and discharge and inspect internals to insure absence of rust Check all internal clearances Also at this time remove gearbox and drive end bearing cover and inspect gear teeth and bearings for rust Because of the completely enclosed unit design location of the installation is generally not a critical matter A clean
104. tion in piping See item 3 7 Excessive slip Check inside of casing for worn or eroded surfaces causing excessive clearances Excessive power 8 Speed too high Check speed and compare with published performance 9 Excessive pressure rise See Item 5 10 Impeller rubbing Inspect outside of cylinder for high temperature areas then check for impeller contact at these points Correct blower mounting drive alignment 11 Scale sludge rust Clean blower appropriately or product build up Overheating of 12 Inadequate lubrication Check oil sump levels in gear and drive end headplates bearing or gears 13 Excessive lubrication Check oil levels If correct drain and refill with clean oil of recommended grade 14 Excessive pressure rise See Item 5 15 Coupling misalignment Check carefully Realign if questionable 16 Excessive belt tension Readjust for correct tension Vibration 17 Misalignment See Item 15 18 Impellers rubbing See Item 10 19 Worn bearings gears Check gear backlash and condition of bearings and replace as indicated 20 Unbalanced or rubbing Scale or process material may build up on casing and impeller impellers or inside impellers Remove build up to restore original clearances and impeller balance 21 Driver or blower loose Tighten mounting bolts securely 22 Piping resonances Determine whether standing wave pressure pulsations are present in the piping 23 Scale sludge build ups Clean out interior of impeller lobes to restore dynamic balance 24 Casing st
105. to switch at base of transducer It is recommended that flexible tubing be used whenever possible Apply pipe compound sparingly to male pipe threads only If applied to female threads it may enter the transducer and cause op erational difficulty Avoid pipe strain on switch by properly supporting and aligning piping When tightening pipe do not use switch as a lever Wrenches applied to transducer body or piping are to be located as close as possible to connection point IMPORTANT For steam service install a condensate loop pigtail or steam syphon tube directly into the pressure transducer CAUTION To avoid damage to the transducer body DO NOT OVERTIGH TEN PIPE CONNECTIONS If TEFLON tape paste or similar lubricant is used use extra care due to reduced friction IMPORTANT eliminate undesirable pressure fluctuations in the system install a surge suppressor Wiring Wiring must comply with local codes and the National Electrical Code The general purpose switch enclosure is provided with a 7 8 diameter hole to accommodate 1 2 electrical hub or connector The watertight switch enclosure has 1 2 conduit hub It is recommended that a flexible conduit connection be used If rigid conduit is used do not consider it or use it asa means of supporting mounting Use No 14 AWG copper wire rated for 60 C minimum Electrical connections are 187 3 16 spade type quick connect terminals Snap switches accept MOLEX INCORPORA
106. um Diameter Inch F C PSI mbar INHG mbar 2 5 225 12 227 15 2 5 210 7 483 15 8 5 240 15 1034 16 8 5 225 12 827 15 3 5 225 7 483 15 4 0 240 15 1084 16 4 0 225 10 6 a an 0 16 15 16 16 15 16 9 4 0 225 7 48 5 0 225 15 103 5 0 225 13 89 5 0 225 7 48 6 0 250 15 103 6 0 240 14 96 48 9 16 12 16 16 12 6 0 130 7 0 250 15 1034 7 0 225 10 690 7 0 130 6 414 RAM J WHISPAIR GAS BLOWER Maximum ALLOWABLE OPERATING CONDITIONS Gear Temp Rise Delta Pressure Inlet Vacuum Diameter Inch F PSI mbar INHG mbar For your nearest ROOTS Office dial our Customer Service Hot Line 1 877 363 ROOTS 7668 22 TABLE 3 RECOMMENDED GRADES Ambient Viscosity Range Approximate Temperature C SSU at 100 F SAE No Above 90 32 1000 1200 60 32 to 90 0 to 32 700 1000 50 0 to 32 18 to 0 500 700 40 Below 0 18 300 500 30 UNIVERSAL URAI J URAI G Sump Capacities Frame Size Capacity Oz Liters Vertica
107. y mark all parts so that they may be returned to original locations or relative positions Requirements for special tools will depend on the work to be done If impeller clearances and float are to be checked or re set a dial indicator and a set of long feeler gauges will be needed Work involving removal of the timing gears cannot be accomplished without a suitable puller Design of ROOTS blower is simple and most repair operations are straightforward For this reason the following procedures are intended mainly to indicate a preferred work order and to call out points to be observed Where special operations are required detailed coverage is given A Replacing Timing Gears 1 Drain all oil from the gearhouse by removing drain plug 21 in the bottom Remove gearhouse by taking out all cap screws 23 in its flange It may be necessary to bump the sides with a wood block or mallet to break the flange joint 2 Reach through one of the blower pipe connections and place a chalk mark on the strip of one impeller and the mating waist of the other so that they may easily be returned to their original relative positions 3 GEAR REMOVAL CAUTION Do not remove gear nuts 17 completely before the gears are unseated from the taper fits or damage injury may result For this operation the impellers should be wedged as shown in Table 5 Back off gear clamping nuts 17 about 1 4 Use a suitable puller or wedge As the puller set
108. y down Use a 1 4 wrench for adjusting nuts CAUTION Adjusting nut will turn easily until it hits a stop Do not over torque Over torquing may cause damage 4 Follow the steps in the chart below to make signal settings Test one snap switch at a time Be sure to start with the high signal side NORMALLY CLOSED NORMALLY OPEN Switch Test Lamp Switch Test Lamp Terminal On Off Terminal On Off Off On Open N Closed Circuit Circuit Adjustment Procedures 1 Starting with initial signal above desired actuation setting connect test lamp to common 3 Increase signal to check reactuation signal 2 Decrease signal to desired actuation On Off Then advance adjust NC Closed ing nut until switch Circuit Circuit actuates Off On NC Open NO Closed Circuit Circuit 5 To adjust low signal setting repeat steps of adjustment in chart above 6 Cycle between actuation and reactuation signals and make minor adjustments to nuts as required to achieve the exact signal setting 7 After settings have been made make permanent electrical connections Testing of Installation If the adjustment of the switch has been made outside of the line of final application the switch should be retested when installed in the line of final application Follow adjustment instructions Be sure switch can be test operated without affecting other equipment Form No P7050R1 MAINTENANCE WARNING To prev
109. ys be practical If a blower is out of warranty mechanical adjustments and parts replacement may be undertaken locally at the owner s option and risk It is recommended that ROOTS parts be used to insure fit and suitability The maintenance of a small stock of on hand spare parts can eliminate possible delays When ordering parts give item numbers and their word descriptions from the appropriate sectional drawings Also specify quantities required and the blower model and serial number from the nameplate Repairs or adjustments are best performed by person nel with good mechanical experience and the ability to follow the instructions in this manual Some operations involve extra care patience and a degree of precision work This is especially true in timing impellers and in handling bearings Experience indicates that high percentages of bearing failures are caused by dirt contamination before or during assembly Therefore the work area should be cleaned before starting disassembly and new or re usable parts protected during progress of the work In the following repair procedures numbers shown in brackets correspond to the item numbers used in sectional drawings It is recommended that the procedures be studied carefully and completely with frequent reference to the drawings before starting work This will produce better efficiency through an understanding of what work is to be done and the order of doing it Before disassembl

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