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Maintenance Manual

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1. ITEM DESCRIPTION QUANTITY 1 Body 1 12 Tailpiece 1 D O 14 O Ring 1 RD 2 Cover 1 ZS po 22 O Ring 1 I 3 Seat 2 3 1 O Ring 2 2 2 Inlet Ring 1 11 4 amp 177 Poppet 2 Seat Disc 2 5 1 Disc Retainer 2 r Round HD TT 2 2 Check Module Assembly 6 Spring 1 1st Check Spring 6 1 Spring 1 2nd Check Spring Guide 2 1 Check Module etainer Spacer 1 Assembly 9 Ball Valve Tapped 1 Union End BV Tapped 1 9 1 Ball Valve 1 i Union End Ball Valve 1 aom 11 Test Cock 4 ONLY 12 Seat Ring RV 1 12 1 Gasket Ring RV 1 13 Spring RV 1 14 Seat Disc RV 1 15 Diaphragm RV 1 16 Outer Diaphragm RV 1 17 Small Piston RV 1 17 1 Round HD Screw RV 1 17 2 Washer RV 1 1 3 Hex Nut RV 1 Check Module 18 Cylinder RV 1 Assembly Kit 18 1 Slip Ring Cylinder RV 1 18 2 Slide Plug RV 1 19 Cover RV 1 20 O Ring RV 1 21 Hex HD Capscrew id 22 Large Piston RV 1 23 Guide RV 1 Quantity varies with valve size 6 each for 1 2 and 3 4 8 each for 1 14 each 11 4 11 2 2 Relief Valve Module Kit not including 21 View as shown is for sizes 11 2 2 40 50mm 10 MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Repair Kits How to order parts and Repair Kits 1 Locate item number and kit number in this maintenance manual 2 Verify the size of the valve the parts are to be used on 3 Provide ful
2. Inspect and replace seal or O ring SYMPTOM 2 Intermittent discharge from relief valve during NO FLOW conditions With the symptom the pressure drop across the 1 check valve would be varying from about 2 to 7 psid CAUSE A Inlet line pressure variations causing relief valve to discharge SOLUTION Eliminate or reduce pressure variations by installing a soft seated spring loaded check on upstream side of device B Pressure surges water hammer causing relief valve to discharge as pressure wave passes through the zone Eliminate or reduce pressure surges MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Troubleshooting Guide Continued SYMPTOM 3 Continuous discharge from relief valve during FLOW and NO FLOW conditions With this symptom the pressure drop across the 1 check valve would be 7 psid or more at all times CAUSE A Seat disc dislodged from cavity in the main stem This can be caused by pressure surges during initial filling of system lines SOLUTION Reposition disc in main stem cavity Repressurize system slowly Repressurize system slowly B Debris fouling the relief valve seat Inspect and clean C Debris blocking the relief valve sensing passage Inspect and clean D Dirt or scale jamming main stem Inspect and clean or replace E Leakage at main stem Inspect and clean or replace SYMPTOM 4 Relief valve does not op
3. 50mm Part No 905347 905347 905349 905351 905351 905351 ALL SIZES INCLUDE ITEM DESCRIPTION QTY ITEM DESCRIPTION QTY 3 Seat 1 5 1 Disc Retainer 1 3 1 O Ring 1 5 2 Round HD Screw 1 4 Poppet 1 6 Spring 1 5 Seat Disc 1 7 Guide 1 Relief Valve Module Assembly Kit 1 2 15mm 3 4 20mm 1 25mm 1 a 32mm 1 2 40mm 2 50mm Part No 905353 905353 905353 905354 905354 905354 ALL SIZES INCLUDE ITEM DESCRIPTION QTY ITEM DESCRIPTION QTY 12 Seat Ring RV 1 17 3 Hex Nut RV 1 12 1 Gasket Ring RV 1 18 Cylinder 1 13 Spring RV 1 18 1 Slip Ring Cylinder RV 2 14 Seat Disc RV 1 18 2 Slide Plug 1 15 Diaphragm RV 1 19 Cover 1 16 Outer Diaphragm RV 1 20 O Ring RV 1 17 Small Piston RV 1 22 Large Piston RV 1 17 1 Round HD Screw RV 1 23 Guide RV 1 17 2 Washer RV 1 12 MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Freeze Protection The backflow prevention assembly may be subject to damage if the inter nal water is allowed to freeze The unit must be protected from freezing using a heated enclosure insulation using heat tape or other suitable means The unit must always be accessible for testing and maintenance If the system will be shut down during freezing weather use the follow ing procedures to drain internal passages Ball Valve Shutoff Draining Procedure If the assembly has been installed with ball valve shutoff valves they must also be properly drained to prevent fr
4. Please consult the regulatory authority in your area for more specific information rT rT ROU nm n ed LL u fi ji ri t r d1tI 4 1 Before installation check local codes This type of drain may not be approved for use in some areas CAUTION This drain is intended to catch moderate relief valve discharges due to line pressure fluctuations and minor check valve fouling Under certain conditions relief valves can discharge water at rates greater than the air gap drain capacity 2 If installed indoors the assembly should be installed near a floor drain sized to adequately handle discharge A Strainer before the backflow assembly is strongly suggested on indoor installation 3 After installation of backflow assembly and piping attach drain funnel to relief as shown using self tapping screws provided in kit to join drain funnel halves together making sure that the slots in the drain fun nel are located over tabs on relief valve port Note Discharge of drain funnel is a slip fit design Drain funnel was not designed to nor is it able to support drainpipe weight Air Gap Part Number PLASTIC METAL VALVE SIZE PART NO PART NO Ya 905358 905532 3 4 905358 905532 1 905358 905532 T4 905359 905533 T2 905359 905533 2 905359 905533 MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Exploded View
5. Test cock 1 should remain closed 2 Loosen brass cylinder in center of relief valve cover Item 18 by unscrewing 1 4 turn counterclockwise Remove the relief valve cover bolts Item 21 and relief valve cover Item 19 3 The internal relief valve assembly module will be attached to the relief valve cover Unscrew the brass cylinder and remove from cover Grasp the outer diameter of the large outer diaphragm Item 15 and pull away from the cover until the small outer diaphragm Item 16 comes out through the relief valve cover hole and is completely separated from the relief valve cover Discard old internal relief valve assembly module Remove the plastic slip rings Item 18 1 and discard Slide out the seat ring Item 12 and seat gasket ring Item 12 1 from the relief valve body and discard 4 Apply a thin coating of supplied lubricant to both sides of the new seat gasket ring Item 12 1 and slide it on the short end of the new seat ring Item 12 Slide the short end of the new seat ring into the hole of the relief valve body The adhesion from the lubricant will hold the seat ring in place during the rest of the assembly process MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Relief Valve Repair continued 7 Replace O ring Item 20 in relief valve cover Make sure the round F 2 bead on the large diaphragm is properly seated in the counterbore of 5 Before installing the new internal relief va
6. roll the diaphragm as shown Thread the brass cylinder Item 18 into the relief valve cover and hand tighten 8 After reassembly with all test cocks closed slowly open inlet ball valve and bleed air from the unit by opening and closing test cock 2 then 3 and finally 4 NOTE During the bleeding process the relief valve may discharge a high volume of water until all test cocks have been closed and pressure has been stabilized Caution Do not twist the internal parts when the cylinder is tightened The small diaphragm may become folded or creased if the internal assembly is restricted while tightening the cylinder 9 Check for external leaks and repair if necessary Slowly open outlet ball valve 10 Test assembly in accordance with the locally approved test method MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Testing Air Gap Drain Installation Instructions All mechanical devices should be inspected on a regular basis to ensure they are working correctly The assembly should be tested at time of initial installation after servicing or maintenance and at least annually thereafter Acceptable test procedures are published by Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California USC The American Water Works Association AWWA The American Society of Sanitary Engineering ASSE Series 5000 and the Canadian Standards Association CAN CSA B64e10
7. steady Malfunctioning pressure relief valve 2 to 7 psid and steady Inlet pressure fluctuating SYMPTOM 2 Check Differential Across READING 2 to 3 psid PROBLEM 1 check valve held open 1 Check Valve 6 to 8 psid and steady Malfunctioning pressure relief valve Without Differential Pressure Gauge SYMPTOM 1 AND 2 A Close Gate Valve 2 RESULT If discharge stops PROBLEM Leak in 2 check valve If discharge does not stop Go to B B Open 4 test cock to produce a flow greater than differential relief valve discharge If discharge stops Leak in 41 check valve If discharge does not stop Malfunctioning pressure relief valve SYMPTOM 1 Continuous discharge from relief valve during NO FLOW conditions Discharge stops with water flow With this symptom the pressure drop across the 1 check valve would be 2 to 3 psid If a flow of water more than discharge is created through the valve the pressure drop should increase to approximately 7psi CAUSE A Debris fouling 1 check valve SOLUTION Inspect and clean B Outlet pressure higher than inlet pressure and debris fouling 2 check valve Inspect and clean C Spring stem not moving freely Inspect for dirt or other foreign material D Damaged seat or seat disc Inspect and replace If necessary seat disc can be reversed in 1 2 through 2 sizes E Leakage at check module O ring
8. COonline com CALIFORNIA PROPOSITION 65 WARNING WARNING This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm California law requires this warning to be given to customers in the State of California For more information www watts com prop65 Limited Warranty FEBCO warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment In the event of such defects within the warranty period the Company will at its option replace or recondition the product without charge THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT THE COMPANY MAKES NO OTHER WARRANTIES EXPRESS OR IMPLIED THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty and the Company shall not be responsible for any incidental special or consequential damages including without limitation lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly other costs resulting from labor charges delays vandalism negligence fo
9. IOM F RP INSTALLATION OPERATION MAINTENANCE Maintenance Manual Reduced Pressure Assembly Series 860 amp 860U 15 2 15 50mm Series 860 Table of Contents Feature and Operating Procedures sss sss 2 NANGAIISM ss at tot ette o Poor Gama EUR e iaaea ets 2 General Service Procedures 6 ccc cece eee eens 3 Cut A Way Drawing 3 Troubleshooting Guide 0 0 6 esses 4 Check Module Disassembly sssssselssssssss esses 6 Check Module Seal Replacement iisississsssssssssssss 6 Check Module Re Assembly liisisssssssssssssss esses 7 Relief Valve Bepalr ier RR E Deda doe E sek Meow 7 Mn me ET 9 Air Gap Drain Installation Instructions 0 00 0 c cece eee 9 Exploded VIEW ue cacy nen bapa tia ea e top ee cei MES 0 Model 860 860U 1 2 2 Parts List liess sss 1 Repair KIt 2 ace hte Pe Exod tu Stepb doeet d a peat d 1 Freeze Protection csse pe crossi cret pragma dake PAR Reda 3 Main Valve Draining Procedure 2 2 0 0 00 cece eee 3 FEBCO Performance Value and Quality 0 0 0 04 4 EEIN E AE EEA RUOME n RUPEE aS 6 Read and understand this manual prior to installing operating or servicing this equipment MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Feature and Operating Procedures The FEBCO Reduced Pressure Backflow Preventer Assembly consists of two independently operating spring loaded check valves with a pressu
10. eeze damage After draining procedure has been completed on the backflow prevention assembly position all ball valve shutoffs and test cocks in a half open half closed 45 degree position Open the ball valve approximately 45 degrees while draining the pipeline and assembly to allow water between the ball valve and valve body to drain Leave the ball valve in this position for the winter to prevent freeze damage The ball valve must be fully closed before the System is repressurized OPEN AND CLOSE BALL VALVES SLOWLY TO PREVENT DAMAGE TO THE SYSTEM CAUSED BY WATER HAMMER Main Valve Draining Procedure 2 15 50mm 1 Close the main shutoff valve 2 Open the inlet drain 3 Open the inlet and outlet ball valves 45 degree half open half closed 4 Open all testcocks 5 Open the outlet drain 6 Remove the cover and inlet check module until all water inside valve drains back out through inlet drain 7 f you blowout the piping downstream of the backflow assembly using compressed air Connect the air supply to the outlet drain and close the outlet ball valve After clearing the system with air partially open the outlet ball valve Leave all drain valves testcocks and ball valves in half open half closed position for the winter 8 RP UNITS ONLY Loosen the relief valve cover to drain Tighten when draining is complete 13 MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm FEBCO Per
11. en above 2 0 psid during field testing CAUSE A Outlet gate valve not closed completely SOLUTION B Plugged low pressure hydraulic passage from ZONE to inner diaphragm Inspect and clean C Improper alignment of internal parts during Reassemble reassembly causing high resistance to movement D Jammed main stem due to debris Clean Check for debris blocking gate valve SYMPTOM 5 CAUSE SOLUTION First check pressure drop is low less than 5 psid during field testing A Debris fouling first check seat Inspect and clean B Debris fouling second seat with backpressure Inspect and clean C Inlet pressure variations causing inaccurate gauge reading Eliminate pressure variations see symptom 2A D Damaged seat or seat disk Inspect and clean if required E Worn guide bushing or stem Inspect and replace as required SYMPTOM 5 Second check fails to hold back pressure during field testing CAUSE A Outlet gate valve not closed completely B Debris fouling second check seat SOLUTION Inspect and clean Inspect and clean C Damaged seat or seat disk Inspect and replace if required D Worn guide bushing or stem Inspect and replace if required MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Check Module Disassembly 1 Slowly close inlet and outlet ball valves Bleed residual pressure by opening 2 3 and 4 tes
12. etainer Item 5 1 so the rubber disc is fully exposed Carefully pry out the rubber disc from poppet Be careful not to damage the poppet when removing the disc Rinse poppet in clean water and replace the old rubber disc with new rubber disc If the rubber disc is not damaged it can be reversed and reinstalled when a new disc is not available Rinse all other internal components with clean water Replace disc retainer and secure with retaining screw Item 5 2 3 Reassemble check module in the reverse manner as indicated in above When reassembling the check module be sure to insert the poppet stem into the guide hole and keep fingers clear of the slots in the module MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Check Module Re Assembly Use reverse procedure for assembly with the following special instructions 1 Inspect the check module O ring Item 3 1 for damage and replace if necessary To ease assembly apply a thin coating of supplied lubricant to the O ring Item 3 1 prior to installing in body CAUTION Excess lubricant may cause foreign debris to collect on internal components which could foul the check assembly and result in a test failure 2 The word INLET is inscribed on the end of each module That end should face the inlet of the valve 3 On Reduced Pressure Assembly Series 860 make sure the check assembly with the heavy duty spring is inserted in the inlet bore of the body 1st check pos
13. formance Value and Quality FEBCO MasterSeries 21 2 10 15 50mm Double Check Double Check Reduced Pressure Assembly Detector Assembly Assembly Series 870V Series 876V Series 880V N Shape Vertical Series 860 Conventional In Line For nearly half a century customers have looked to FEBCO for quality products reliable low head loss performance and great value Today with the new FEBCO MasterSeries designs FEBCO has once again taken the initiative with patented product innovations All 21 2 through 10 65 250mm MasterSeries products include Patented VectorCheck performance for low head loss Cast ductile iron bodies for lighter weight Lowest installed cost Saves on labor and material e Choice of cost saving N Shape designs revolutionary vertical designs or conventional in line designs Contact a FEBCO representative today for product literature and technical specifications on FEBCO MasterSeries backflow prevention products 14 MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Notes 15 For additional information visit our web site at www FEB
14. ition The check assembly with the weaker spring must be installed in the outlet bore of the body 2nd check position 4 When replacing spacer Item 8 between the two check assemblies be sure that the flanged end of the spacer is touching the back side of the inlet check assembly so that the cover will fit properly Next replace cover making sure 3 test cock is on the upstream side Do not over tighten cover bolts Approximately 35 inchepounds is sufficient 5 After reassembling close test cock 2 3 and 4 test cock 1 should already be closed slowly open inlet ball valve Bleed air from the unit by opening and closing test cock 2 then 3 and finally 4 Note During the bleeding process on the Reduced Pressure Assembly Series 860 the relief valve may discharge a high volume of water until all test cocks have been closed and pressure stabilized 6 Check for external leaks and repair if necessary Slowly open outlet ball valve 7 Test assembly in accordance with the locally approved test methods Relief Valve Repair NOTE Discharge from the relief valve assembly may not indicate a relief valve failure The relief valve will discharge water when the mainline check valves become fouled with foreign debris See Troubleshooting Guide for more information BEFORE disassembling the relief valve 1 Slowly close inlet and outlet ball valves Bleed off air from the unit by opening and closing test cock 2 then 3 and finally 4
15. l model number located on D plate 4 Give kit number 5 A serial number located on the I D plate will assist in ordering the proper kits 6 Contact your local FEBCO Parts Distributor Check Module Rubber Kit 1 7 15mm 3 4 20mm 1 25mm 114 32mm 12 40mm 2 50mm Part No 905342 905342 905343 905344 905344 905344 ALL SIZES INCLUDE ITEM DESCRIPTION QTY ITEM DESCRIPTION QTY 1 4 O Ring 1 3 1 O Ring 2 2 2 O Ring 1 5 Seat Disc 2 Relief Valve Rubber Kit 1 2 15mm 3 4 20mm 1 25mm 11 4 32mm 17 40mm 2 50mm Part No 905345 905345 905345 905346 905346 905346 ALL SIZES INCLUDE ITEM DESCRIPTION TY ITEM DESCRIPTION QTY 12 Seat Ring RV 1 16 Outer Diaphragm RV 1 12 1 Gasket Ring RV 1 18 1 Slip Ring Cylinder RV 2 14 Seat Disc RV 1 20 O Ring RV 1 15 Diaphragm RV 1 11 MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Repair Kits Continued 1st Check Module Assembly 1 2 15mm 3 4 20mm 1 25mm 11 4 32mm 1 2 40mm 2 50mm Part No 905348 905348 905350 905352 905352 905352 ALL SIZES INCLUDE ITEM DESCRIPTION QTY ITEM DESCRIPTION QTY 3 Seat 1 5 1 Disc Retainer 1 3 1 O Ring 1 5 2 Round HD Screw 1 4 Poppet 1 6 1 Spring 1 5 Seat Disc 1 7 Guide 1 2nd Check Module Assembly 1 2 15mm 3 4 20mm 1 25mm 1 a 32mm 1 2 40mm 2
16. lve assembly module apply the relief valve cover Position spring Item 13 over the seat ring in the a thin coating of supplied lubricant to both sides of one slip ring Item relief valve body and hold in place while inserting the guide end Item 18 1 and insert it into the top of the relief valve cover Install the new 23 of the relief valve assembly module and relief valve cover Position internal relief valve assembly module by grasping the outside of the the assembly so the O ring aligns with the sensing hole in the body outer diaphragm in one hand and the smaller diaphragm in the other and the guide slides into the seat ring Replace relief valve cover bolts hand Then pull upward gently on the small outer diaphragm Item 16 and tighten to approximately 35 inchepounds Do not over tighten so that it forms the shape ofa tulip Hold the small diaphragm so that Tighten the brass cylinder Item 18 in the relief valve cover to approxi it maintains this tulip shape while sliding it through the relief valve mately 30 feet nouinda of tarauie Da not over tiahten cover hole and plastic diaphragm gasket 6 Apply a thin coating of supplied lubricant to both sides of the second slip ring Item 18 1 and place it over the top of the small diaphragm making sure the outer diaphragm Item 16 is not folded or creased under the slip ring Push the slip ring down flat until the adhesion from the grease holds the small diaphragm in place This should
17. re differential relief valve located between the two checks The pressure drop across the first check valve is approximately 7 0 psid with no flow The relief valve consists of a hydraulically balanced diaphragm with the high pressure side hydraulically connected to the upstream pressure zone The relief valve remains closed during normal operation The low pressure side of the diaphragm is spring loaded to force the relief valve open when the pressure drop across the first check and across the dia phragm reduced to approximately 3 0 psid A complete assembly includes two shutoff valves and four test cocks Vandalism If the unit is installed where vandalism may be a problem the assembly should be protected and secured On 1 2 through 2 15 50mm units the handles of shutoff valves can be removed to discourage tampering A protective enclosure can be installed over the unit to discourage van dals If an enclosure is used it should be installed so that adequate clear ance is available for maintenance and testing Consult local codes before installing any type of protective enclosure MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm General Service Procedures 1 FEBCO backflow prevention assemblies can be serviced with stan 3 Rinse all parts with clean water before reassembly dard tools and are designed for ease of maintenance The assem 4 Carefully inspect diaphragms seals and seating surfaces for damage blies a
18. re designed to be serviced in line so the unit does not need or debris If the check valve seat disc has been severely cut at the seat to be removed from the line during servicing NO special tools are ring diameter the assembly has been subjected to extremely high and required repeated back pressure Either thermal water expansion or water hammer are the most likely causes If back pressure persists consider 1 4 Suggested Tool Kit Series 860 1 2 2 15 installation of a pressure relief valve downstream of the assembly 50mm 5 Use caution to avoid damaging any guiding surfaces while handling crescent wrench parts Do not force parts together The O ring seals used in FEBCO assemblies require only a small tightening force to ensure medium standard screw driver a positive seal Differential pressure test kit 6 Test unit after servicing in accordance with locally approved test medium Phillips screw driver methods to ensure proper operation See page 9 for more details Box open end wrench 7 Refer to applicable exploded drawings and parts lists pages 10 11 2 The most common cause of check fouling and relief valve discharge is for visual aid information dirt and debris in the seating areas The line should be flushed clean of 8 Apply a thin coating of the lubricant supplied in the repair kit to the debris before installation of the assembly To flush the line after instal O rings and other seals as direc
19. t cocks Allow the test cocks to remain open until the reassembling is completed Test cock 1 should remain closed 2 Remove the cover bolts Item 21 using the appropriate size wrench 3 Remove spacer Item 8 by grasping the flanged end of the spacer and pulling straight up Am 4 Remove the inlet check assembly by pulling it in the direction of flow out from the body bore until it is completely exposed then lift out of the body 5 Remove the outlet check assembly by placing the tip of a medium size flat nose screw driver in the slot of the seat Item 3 and prying the check assembly back until the red O ring Item 3 1 is exposed Then using your fingers pull it out from the body bore until it is completely exposed then lift out of the body Check Module Seal Replacement Both check assemblies are disassembled and reassembled in the same manner To service the checks you may replace the check modules with new ones by using check module assembly kits available from FEBCO Or you may also replace the rubber components in the check modules by using the replacement rubber parts kits available from FEBCO For details on parts and kits please see pages 10 12 1 To disassemble grasp the seat section Item 3 in one hand and the guide section Item 7 in the other hand and then rotate in a counter clock wise direction approx e turn until the two parts disengage 2 Remove retaining screw Item 5 2 and disc r
20. ted in this manual lation of the assembly slowly close the inlet shutoff valve remove the cover and spring assemblies of both check valves and open the inlet shutoff valve to allow sufficient flow of water through the assembly to clear all sand debris etc from the line If debris in the water continues to cause fouling a strainer may be installed upstream of the assembly check local codes Cut A Way Drawing 1st Check Module Test Cock 3 Test Cock 1 Test Cock2 Test Cock 4 Inlet Shutoff jl A Valve 2nd Check Module Outlet Shutoff Valve uu i S NAS NY NYS n 7 z ER Flow gt I Tr L SN CN E SUZ s CST 7 N 7 f 7 j Relief Valve ij gt A Note Union Ball Valves Not Shown v 7 77 v NJ MAINTENANCE MANUAL SERIES 860 amp 860U 1 2 2 15 50mm Troubleshooting Guide With Differential Pressure Gauge SYMPTOM 1 Check Differential Across 311 Check Valve READING 2 to 3 psid PROBLEM Leak in 1 or 2 check valve 6 to 8 psid and
21. uling caused by foreign material damage from adverse water conditions chemical or any other circumstances over which the Company has no control This warranty shall be invalidated by any abuse misuse misapplication improper installation or improper maintenance or alteration of the product Some States do not allow limitations on how long an implied warranty lasts and some States do not allow the exclusion or limitation of incidental or consequential damages Therefore the above limitations may not apply to you This Limited Warranty gives you specific legal rights and you may have other rights that vary from State to State You should consult applicable state laws to determine your rights SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT CERTIFIED A Division of Watts Water Technologies Inc USA 4381 N Brawley e Ste 102 e Fresno CA e 93722 e Tel 559 441 5300 e Fax 559 441 5301 e www FEBCOonline com Canada 5435 North Service Rd e Burlington ONT L7L 5H7 e Tel 905 332 4090 e Fax 905 332 7068 e www FEBCOonline ca IOM F RP 0845 EDP 1915983 O FEBCO 2008

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