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Installation and Service Manual INDOOR

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1. 82116 651 2 AA i 10418 10418 gt 131 B 18 18 28 3 4 28 3 4 39 1 2 391 2 5278 39 1 2 39 1 2 527 8 BB 873 4 87 3 4 1458 C 217 8 217 8 325 8 325 8 433 8 433 8 5678 43 3 8 z 43 3 8 567 8 cc 69 5 8 69 5 8 7458 NOTE All dimensions in inches All models 100 400 are E T L design certified Check installation manual for recommended clearances Dimensions Indoor Models AA overall 2 12 4 Overall gt Venter Outlet Combh Air Inlet 4 Venter Outlet a 4 Separated Comb s poe vues CEER PS A Inlet Opening E En i t 2 Pc Door I A T 3 iit Grane type i Combustion air opening 37 duct connector Alternate HUN onboth sides 2114 Standard om m E gom D turned out 3 4 E Air Q i Flow 1 I BB Duct single connection This furnace and extra support channel furnished 1232 02 on 500 A 600 4 amp manne 800 A units only CC rail Gas and electrical openings in base pan 3015 4 3015 Removable side panel for access to controls This furnace furnished on 500 B 60 B FRONT VIEW and 800 B units only SIDE VIEW INDOOR MODEL NO 100 125 160 210 250 300 400 500 A 500 B 600 A 600 B 800 A 800 B A 30 3
2. If two furnaces are to be used in a side by side application they must be installed so that the ENDS OPPOSITE the control access doors ADJOIN A 4 inch frame is an integral part of the appliance and may be installed directly on the floor or roof or other combustible construction For ease of service and safe operation however it is suggested that the furnace be located above the installation surface on a field fabricated base and should be high enough to prevent any form of moisture from entering the unit Be sure that the roof joists or other obstructions will not interfere with the discharge and return air ducts The discharge and return air ducts should be correctly sized for securing to the furnace and all connections exposed to the weather must be moisture tight A high temperature caulking 250 F or sheet metal flashing may be used for this purpose A weathertight seal must be provided where ducts enter through the roof Field installed ductwork on the unit discharge end must be secured to the flanges on the heat exchanger and not on unit front cabinet Failure to properly install could cause fire explosion damage to equipment or even death Provide tight fitting inspection panels in duct work both upstream and downstream close to the furnace These panels must be large enough so that the heat exchanger can be easily inspected Outdoor units must be installed from any building exhaust fan at a minimum distance of 10 feet For installations
3. WARNING INSTALLATION PRECAUTIONS NOTE GUARANTEE OF THIS EQUIPMENT IS SUBJECT TO CONFORMANCE WITH THE FOLLOWING 1 Heater Location Requirements a Outdoor units with poor venting pilot outage and other undesirable operating conditions may be caused by a negative pressure condition or high pressure zones created by walls or other obstructions Therefore the furnace must be located as far as possible from the source of such turbulence and at least six feet from the edge of the roof Indoor units must NOT be operated in the presence of CHLORINATED SOLVENTS Even slight traces of chlorine combined with products of combustion will cause serious damage Indoor units must have adequate COMBUSTION AIR If heaters are installed in a closed room provide outside opening of one square inch per 1 000 BTU for combustion air alone Indoor units must not operate in an area with a negative air pressure condition Provide adequate MAKE UP AIR Indoor units installed where there is sawdust lint soot dirt etc areas of high air contam ination must be cleaned FREQUENTLY or serious damage will result Refer to section on CLEANING for recommended frequency WARNING Installer Service Technician must remove burner tray to inspect burner assemblies to insure proper alignment Prior to installing gas supply line to unit gas inlet remove the L locking bracket and disconnect the electrical connections and slide the burner tray out of the heater O
4. and burner operation continues until call for heat is satisfied Module then deactivates both pilot and main gas valves and unit shuts down 14 Two types of ignition control modules are utilized A non 100 shutoff design is used with natural gas ONLY It provides continuous spark for pilot ignition but if pilot does not light trouble must be isolated and corrected A 100 shutoff design may be used for natural and L P gas It provides a 90 second gas trial for pilot ignition If pilot does not light within the trial time module deactivates pilot valve 100 safety lockout but continues spark for pilot ignition This system may be reset at the thermostat or controller and trial for ignition resumed If pilot still fails to ignite trouble must be isolated and corrected Preliminary Circuit Analysis In order to diagnose the cause of problems in this system it is necessary to determine certain values It is helpful to have an AC and DC voltmeter and an ohmmeter capable of reading 0 to 15 000 ohms For ease in troubleshooting it is necessary to rewire the system replacing the discharge air sensor with a 4500 ohm 75 watt test resistor Modulating Function Test Connect a DC voltmeter to amplifier terminals 1 and 2 If more convenient the meter may be attached to the MR valve terminals Rotate temperature selection knob to maximum setting the DC volts should read zero The voltage should gradually increase to at least 20 volts when th
5. ator or decreasing size of supply piping to unit W C 2 Dirty burner ribbons or flue tubes See CLEANING on page 15 and 16 3 Insufficient combustion air Make sure air inlets of unit are open Clean unit If condition still exists see item 1 of INSTALLATION PRECAUTIONS e Blower Fails to Operate within 2 Minutes after Burners Ignite 1 Faulty blower wiring connections Inspect and correct wiring connections as necessary motor or fan controls Connect line voltage directly to motor If motor operates replace fan control if non adjustable 2 Timed fan control Readjust timing control 20 NATURE OF TROUBLE CORRECTIVE MEASURES e Insufficient Heat Delivery from Furnace 1 Undersized spuds or manifold pres Consult manufacturer for proper spud size be sure below marking on specification fore changing or gas company before adjusting regu plate lator Be sure gas supply pipe size to unit is adequate 2 Improper air delivery Too much supply air Check for proper air delivery Consult factory 3 Dirty flue tubes Clean tubes See CLEANING on page 15 and 16 e Furnace Overheats or Cycles on Limit Switch 1 Main gas valve faulty Stuck in open Replace main valve or operator position 2 Faulty limit switch or fan control if Inspect and replace as necessary used 3 Blower motor cutting out on overload Check for high or low voltage Check for faulty motor or motor over load 4 Inadequate air delivery from blower C
6. 000 IH ISH H HRDV 250 250 000 250 000 190 000 200 000 IH ISH H HRDV 300 300 000 300 000 228 000 240 000 IH ISH H HRDV 400 400 000 400 000 304 000 320 000 IH ISH H HRDV 600 300 000 600 000 456 000 480 000 IH ISH H HRDV 800 400 000 800 000 608 000 640 000 IH ISH H HRDV 200 100 000 200 000 152 000 160 000 IH ISH H HRDV 250 125 000 250 000 190 000 200 000 IH ISH H HRDV 320 160 000 320 000 243 200 296 000 IH ISH H HRDV 420 210 000 420 000 319 200 336 000 IH ISH H HRDV 500 250 000 500 000 380 000 400 000 IH ISH H HRDV 600 300 000 600 000 456 000 480 000 IH ISH H HRDV 800 400 000 800 000 608 000 640 000 IH ISH H HRDV 1000 250 000 1 000 000 760 000 800 000 IH ISH H HRDV 1200 300 000 1 200 000 912 000 960 000 IH ISH H HRDV 1600 400 000 1 600 000 1 216 000 1 280 000 All I IS and H series units are 8096 efficient OPERATION When the unit is in the winter mode the fan is on bringing outside and or return air into the building The furnace is on and maintaining a discharge temperature as indicated by the Maxitrol Selectra dial Example 73 F and the Maxitrol gas valve is modulating If the discharge temperature exceeds the dial set point the Maxitrol amplifier will indicate to shut the ignition system off When the temperature starts to cool the Maxitrol sensor just below set point the amplifier will
7. 3606 Yost Avenue Hastings Nebraska 68901 1966 Phone 402 463 9821 Fax 402 462 8006 www hastingshvac com E mail sales hastingshvac com service hastingshvac com
8. facing combustible materials or openings of surrounding buildings A venting system shall not terminate within 1m of the following Above a gas meter regulator assembly within 1m horizontally of the vertical centerline of the regulator An oil tank or an oil tankfill inlet The inside corner of an L shaped structure A venting system shall not terminate within 3m of the following Above grade level or any surface that may support snow ice or debris Distance from adjacent public walkways adjacent buildings openable windows and building openings shall conform with local codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 1 NFPA 54 or the Natural Gas and Propane Installation Code CSA B149 1 m Information that local codes may supersede any of the above provisions BLOWER 1 Remove any tie downs if blower is internally isolated painted yellow 2 Lubricate bearings prior to unit start up Refer to ADDITIONAL MAINTENANCE PROCED URES page 17 item 6 TABLE II I AND IS HORIZONTAL FLUE SIZING Input in 1000 s BTU Hr Flue Pipe Diameter Maximum Length of Flue Pipe 100 4 0 IN 82 0 FT 125 4 0 IN 82 0 FT 160 4 0 IN 82 0 FT 210 6 0 IN 72 0 FT 250 6 0 IN 72 0 FT 300 6 0 IN 72 0 FT 400 6 0 IN 72 0 FT The instructions for the installation of the venting system shall specify that the horizontal portions of the venting system shall be supported to prevent sagging the m
9. igniter ourner assembly must be replaced Inspect and correct as necessary igniter lead and ground wire connections If ignition continues to spark replace module Replace high limit switch or blocked vent limit switch Check venting See item 5 of Pilot Fails to Light in this section See item 1 of Pilot Fails to Light in this section See item 2 of Pilot Lights But Ignition Spark Continues in this section To test ignition module check low voltage across MV and MV PV terminals If no or inadequate voltage is detected replace module lf voltage is satisfactory inspect main gas valve Check all wiring connections between ignition module and main gas valve and correct as necessary If module and wiring inspections are satisfactory replace main gas valve or valve operator 19 NATURE OF TROUBLE CORRECTIVE MEASURES e Main Burners Shutdown Before Call for Heat Is Satisfied 1 Faulty limit switch Replace limit switch 2 Interrupted gas supply to unit or Check gas supply Inspect main gas valve for proper faulty main gas valve operation Replace main valve or operator as necessary 3 Faulty system ground flame sensing If ground is poor nuisance shutdowns may occur circuit or wiring connections occasionally even though burner operation is normal at the time of an inspection Test continuity of igniter lead and ignition module ground wire Correct as necessary Inspect flame rod Clean or replace if needed Check and c
10. should not be adjusted If the blocked vent switch is determined to be the reason for the burners to shut off consult factory service agent for instructions before attempting to place furnace back into operation Venting is required on all indoor installations IS and IH units See drawings S 136 and S 137 for recommended arrangements a b C h k Positive pressure flue vent is recommended for installations inside building Provide for the IS and IH Series For the requirement of positive pressure flue vent review local codes Pitch vent pipe up toward outlet 74 per foot for condensate drainage Type B gas vent is recommended for flue venting above roof lines or external wall penetrations Straight vertical runs out through the roof are preferred Vertical stack must be a minimum of five feet high Vertical flue stacks shall be terminated with an approved cap The maximum horizontal vent pipe length for these heaters is shown in Table II A total equivalent horizontal vent pipe length can be calculated using equivalent straight pipe lengths for tees and elbows reducing the maximum horizontal vent pipe length by six feet for each sweep elbow two and one half feet for termination tee and ten feet for each short radius elbow Termination vents with screens require periodic cleaning to prevent the loss of proper venting which can trip the blocked vent switch A gradually tapered vent pipe transition i
11. where heater is installed in a garage it shall be installed with a minimum clearance above the floor of 18 in 457 mm ELECTRICAL Unit must be electrically grounded and all wiring must be done in accordance with applicable local codes and the National Electrical Code ANSI NFPA 70 and or the CSA C22 1 Canadian Electrical code if an external electrical source is utilized In order to determine the size of the power supply lines check the electrical specification plate located on the unit for ampere requirements On units not ordered with a disconnect switch it is recommended that a weatherproof disconnect switch be mounted on or near the unit Connect power supply lines from main disconnect switch to unit disconnect switch Install thermostat or remote control station if supplied according to wiring diagram Thermostats and remote control stations must be installed in a suitably protected and secure location to prelude tampering and damage Thermostats must not be exposed to physical shocks or jarring either before or after installation VENTING The Indoor model furnace is equipped with a power venter and is complete as received No further venting of unit is required for outdoor installation 3 4 Indoor units 1 or IS are equipped with a blocked vent switch BV to shut off the main burners in the event the vents are blocked sufficiently to prevent proper operation of the burners The blocked vent switch is factory set and
12. 0 41 41 521 16 521 16 65 52 1 16 52 1 16 65 AA s I 104 104 131 I B 18 18 28 28 39 1 2 39 1 2 52 7 39 1 2 39 1 2 52 BB I 87 87 114 C 121 21 32 32 43 43 56 43 43 56 7s cc I I E I 69 74 I D 6 6 6 6 6 6 6 2 6 2 6 236 2 6 2 6 2 6 DD 2 6 2 6 2 6 2 6 2 6 2 6 2 6 4 6 4 6 4 6 4 6 4 6 4 6 NOTE All dimensions in inches All models 100 400 are E T L design certified Check installation manual for recommended clearances Indoor Separated Combustion model will have 1 venter outlet and 1 combustion air inlet per duct furnace 1 SHIPPING The unit is shipped by either common carrier or flat bed trailer Consult with the factory on number of sections per load Units supplied with four duct furnaces will have downstream duct furnaces shipped separate and will require field assembly The remote control panel when provided is shipped unmounted HOISTING UNIT The weight of the systems are available by contacting Hastings HVAC Inc At least four 4 lines minimum and suitable spreaders should be used to lift the unit with slings placed at equal distances under the 4 high base frame or flat platform lift with proper lifting weight ability should be used Unit must be slinged properly with multiple lifting points to prevent t
13. 250 feet 1 T 75 feet 1 T 300 200 feet 1 14 50 feet TA T 400 to 420 100 feet 1 14 35 feet 1 1 500 80 feet 1 1 300 feet 2 2 600 50 11 2 1 200 feet 2 2 30 11 2 TA 900 125 feet 2 2 80 2 2 1000 200 feet 2 2 50 feet 2 2 1200 150 feet 2 2 30 feet 27 2 1600 80 feet 2 2 250 feet 3 3 The BTU input and output of these systems are listed in Table IV See page 13 On units receiving inlet gas pressure in excess of 14 w c a high gas pressure regulator must be provided for each heater section 2 Forlarger installations or longer piping runs consult gas company If more than PSIG 14 in W C pressure is available a high pressure regulator would be required Pipe sizing may be reduced On heating systems with more than one duct furnace multiple high gas pressure regulators may be required Refer to items 3 and 4 of INSTALLATION PRECAUTIONS Pipe joint compound should be resistant to the action of L P gas Install a DIRT TRAP tee nipple and cap at connection to each furnace For ease of servicing an additional union and manual gas valve should be installed adjacent to the furnace exterior An approved readily accessible manual gas valve should be joined to a ground joint type union immediately upstream and connected to the appliance manifold piping 8 A 1 8 N P T plugged tapping accessible for test gage connection must be installed immediately up
14. E E 2 5 LOCATION s o e AER HH E Seba Fere se dove bo o p su au bee remi dn nebo o ooo 6 7 Electrical umu anun M IC UM cc EU MU EcL T RR E I I E 7 11 GaS Supply RIDING EE ed d erede oo e hee 11 13 Operation of Electronic Modulating Valve 13 15 s nun coo eL eee end odd n AV SO ent nU o IM LA EDU o ad LENA oddal 15 21 Model and Serial Number can be found on equipment spec plate located on blower cabinet side Model Serial Date of Purchase Purchased from Dimensions Outdoor Model enter outlet SS SSSs tr TS TSS SS SSS SSS Sas s r O B osi j 3 4 This furnace and extra mr c W Standard support channel furnished n Combustion air opening p a on 5DD A 00 A amp SDD Ar 4 l on both sides 2114 Fink units only w Gas opening Flow Electrical 4 r 1 8 SIDE VIEW TE ee ew i Support channels T CC Tail 3 fz Gas and electric openings in base pan Remowable side panel for access to controls This furnace furnished on 500 8 GDD B and 200 8 only OUTDOOR MODEL NO 100 125 160 210 250 300 400 500 A 500 B 600 A 600 B 800 A 800 B A 305 8 305 8 413 8 413 8 413 8 521 16 65 1 2 521 16
15. ISIRHS RCH 1 May 2014 Supersedes June 2012 Installation and Service Manual INDOOR OUTDOOR HEATING HEATING COOLING SYSTEMS AND INDIVIDUAL DUCT FURNACES Notice Read These Instructions Before Installation Inspect unit on arrival for any shipping damage This unit has been test fired for at least 15 minutes to prove out all phases of operation If any part is missing or damaged notify the carrier at once Intertek WARNING FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury death or property damage Be sure to read and understand the installation operation and ser vice instructions in this manual Improper installation adjustment alteration service or maintenance can cause serious injury death or property dam age Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any ap pliance Do not touch any electrical switch do not use any phone in your building Leave the building immed iately Immediately call you gas supplier from a phone re mote from the building Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be per formed by a qualified installer service agency or the gas supplier AVERTISSEMENT RISQUE D INCENDIE O
16. ONTAL FLUE COMBUSTION AIR INLET MUST BE AT LEAST 12 MINIMUM SEPERATION FROM EXHAUST EITHER TO THE SIDE OR BELOW NEVER ABOVE THE EXHAUST OUTLET 3 8 HOLE FOR DRAINAGE HASTINGS HVAC VENTING INDOOR DUCT HEATER OR INDOOR HEATING HEATING COOLING SYSTEMS APPROVED CAP f INSTALLATION PARAPET WALL VERTICAL HORIZONTAL FLUE PIPE 6 DIA VENT PIPE TYPE B RECOMMENDED ss JO ES POSITIVE PRESSURE VENT FLUE REQUIRED INSIDE BUILDING 6 IF EXHAUST FAN IS USED DURING THE HEATING SEASON PR OE ADEQUATE MAKE UP AIR AND COMBUSTION INSTALL IN AIRPLANE HANGARS IN ACCORDANCE WITH CURRENT NFPA NO 409 STANDARD ON AIRCRAFT HANGARS AND IN PUBLIC GARAGES IN ACCORDANCE WITH CURRENT SUPPORT RODS NFPA NO 88 STANDARD FOR GARAGES SEE PAGE 4 FOR DETAILS CLEARANCES INSTALLATION INDOOR MODELS THE MINIMUM CLEARANCES FROM COMBUSTIBLE MATERIAL ARE AS FOLLOWS CONTROL SIDE WIDTH OF UNIT TOP OF UNIT BOTTOM 6 INCHES 0 INCHES OPPOSITE CONTROL SIDE gt 6 INCHES TERMINATION SUPPORT STRAPS REOUIRED EVERY 5 FEET HORIZONTALY TEE W SCREEN AND AT ELBOWS TO PREVENT SAGGING TEE WITH CONDENSATE HORIZONTAL FLUE 3 8 HOLE FOR DRAINAGE HASTINGS HVAC 10 A venting system shall not terminate within 1 8m of the following A window door or mechanical air supply inlet of any building including soffit openings A gas service regulator vent outlet A combustion air inlet A property line A direction
17. U D EXPLOSION Le non respect des mises en garde pourrait entrainer des blessures graves la mort ou des pertes mat rielles Prendre soin de line et de comprendre les instructions d installation de fonctionnement et d entretien contenues dans ce guide Une installation un r glage une modification une r paration ou un entretien inappropri peut entrainer des blessures graves la mort ou des pertes mat rielles pas entreposer ni utiliser d essence ou autre vapeurs ou liquides inflammables proximit de cet appareil ou de tout autre appareil QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ e Netentez pas d allumer un appareil Ne touchez pas un interupteur n utilisez pas de t l phone dans l difice o vous vous trouvez Sortez de l difice imm diatement Appelez imm diatement le fournisseur de gaz partir d un t l phone l ext rieur de l difice Suivez les instructions du fournisseur de gaz Si vous ne pouvez joindre le fournisseur de gaz appelez les pompiers L installation et les reparations doivent etre confi es un installateur qualifi ou au fournisseur de gaz TABLE OF CONTENTS Page HARDY DIMENSION uius eor tete 1 SHIPPING ESS 2 Hoisting Unt done sol ie TE E sad eee sa gs 2 PROUT EE 3 cjr MT M 2 INSIDE An
18. e temperature selector is slowly rotated to its minimum generally over a 3 to 4 range Automatic Valve Function After the electronic modulation function is tested a voltage reading must be taken across the automatic gas valve These voltage readings will be approximately 24 V AC with the temperature selection knob at maximum setting zero volts AC with the selector at minimum setting The relay switching action should occur when the modulating voltage is between 15 and 19V DC If these voltage readings are observed as noted it is proved that the amplifier and temperature selector are operating properly After testing remove the resistor and reconnect the discharge air sensor Maintenance CLEANING NOTE SOOT DIRT ETC WILL PREVENT PROPER COMBUSTION FOR NORMAL AIR CONDTIONS CLEAN UNIT PRIOR TO HEATING SEASON WITH A PERIODIC INSPECTION AT LEAST ONCE A MONTH THROUGHOUT THE DURATION OF THE SEASON AND CLEAN AS NECESSARY IN HEAVILY CONTAMINATED AREAS INSPECTION AND POSSIBLE CLEANING MAY BE REQUIRED MORE FREQUENTLY DURING THE HEATING SEASON CLEAN FLUE TUBES BURNERS AND PILOT BEFORE THEY BECOME BADLY FOULED e Cleaning Flues 1 Outdoor units a Remove burner drawer assembly To accomplish close manual gas valve to unit and break main gas supply at union Cut furnace electrical supply Unscrew the two quick fasteners at the bottom of the control access panel Pull bottom of panel away slightly and allow panel to drop Remove panel a
19. emove burner drawer assembly To accomplish close manual gas valve to unit and break main gas supply at union Cut furnace electrical supply Unscrew the two quick fasteners at the bottom of the control access panel Pull bottom of panel away slightly and allow panel to drop Remove panel and disconnect applicable electric wiring Remove retaining tabs at each end of the burner drawer and slide drawer assembly out of the furnace h Remove the screws holding top panel and lift panel off i Remove the screws from bottom flange of the collector box cover and lift cover off j Remove the screws from bottom flange of the collector box Remove the two screws from the venter motor support at the right heater leg and disconnect the three conductor cables at the junction box Lift collector box off Power venter assembly will remain attached to the collector box k Lift flue baffles from tubes l Clean the inner surfaces of flue tubes using a 1 1 2 or 1 3 4 long handled wire brush Clean and reinstall flue baffles m Remove dirt from bottom pan and clean burners before reinstalling drawer assembly Be sure to reinstall L tab after drawer assembly is installed in the heater Th Th e Cleaning Burners 1 Burners can be removed from drawer assembly by raising front of burner pushing burner forward against the hold down clip until venturi end of burner is free of support Remove burners next to pilot last and reinstall these burners fir
20. er must operate continuously or whenever the gas valve opens NOTE AS AN ADDED PRECAUTION INSTALL EITHER AN AIR PROVING SWITCH OR A SINGLE POLE NORMALLY OPEN RELAY IN THE ELECTRIC GAS VALVE CIRCUIT THE AIR PROVING SWITCH WOULD SENSE AIR CIRCULATION THROUGH THE SYSTEM THE RELAY WOULD BE ENERGIZED BY THE LOAD SIDE OF THE BLOWER MOTOR STARTER EITHER SWITCH WOULD THEN ACTIVATE THE GAS VALVE TO OPEN BUT ONLY WHEN THE BLOWER WAS OPERATING The high limit control switch is a safety control that provides protection if furnace overheats due to blower failure restricted air flow or faulty controls If unit overheats the limit switch breaks the circuit to the electric gas valve and closes gas supply When the temperature of the heat exchanger drops to a safe degree the limit switch automatically rests and permits the gas valve to open again Cause of trouble must be corrected IMMEDIATELY to avoid serious damage to the furnace The limit switch is a safety control NOT AN OPERATING CONTROL Special precautions for furnaces used in conjunction with AIR COOLING and MAKE UP AIR SYSTEMS a Type 409 STAINLESS STEEL heat exchanges may be used in all applications but is recommended for make up air systems where inlet air temperature is ABOVE 40 F b If furnace is used in either make up air or air cooling applications significant quantities of condensate may form Field installed ductwork on the unit discharge end must be secured to the flanges on the
21. ermostat to a point below room temperature or switch off controller Wait for a minimum of 60 seconds then adjust thermostat above room temperature or switch controller on If ignition is not made within the 90 second trial period the system goes into safety lock out again Check gas supply line and low voltage supply grounded limit switch all wiring connections ignitions module and gas valves Correct as necessary Replace Venter motor end switch Replace vent proving air switch Improve venting practices Improve on negative pressure in room Replace ignition wire Replace ignition control module e Pilot Lights But Ignition Spark Continues 1 Pilot flame does not contact flame rod sufficiently 2 Faulty flame rod igniter lead ground wire connections or inoperative ignition module e Main Burners Fail to Light 1 Faulty high limit switch or blocked vent limit switch Stuck in open position 2 Pilot flame too small 3 Improper too high or low gas pressure at unit 4 Faulty flame rod igniter lead ground wire connections or inoperative ignition module 5 Inoperative main gas valve Adjust pilot to surround end of flame rod about 3 8 Flame must be soft and quiet If a problem develops in the flame sensing circuit pilot flame may NOT be detected to conduct a flame sensing current even though high voltage ignition spark is satisfactory If the flame rod is faulty and cleaning does not correct the
22. ethods of and intervals for support shall be specified These instructions shall also specify that the venting system 1 For a category ll appliance have a horizontal run s sloping upwards not less than 74 in ft 21 mm m from the appliance to the vent terminal 2 For Category II and IV appliances be installed so as to prevent accumulation of condensate and 3 For Category II and IV appliances where necessary have means provided for drainage of condensate Gas Supply NOTE PIPING MUST CONFORM TO STANDARDS OF THE NATIONAL BOARD OF FIRE UNDER WRITERS CAN CGA B149 AND ALL APPLICABLE GOVERNING CODES INSTALL MANUAL MAIN SHUT OFF VALVE UPSTREAM OF APPLIANCE GAS TRAIN OUTSIDE OF THE CONFINES OF THE APPLIANCE IN ACCORDANCE WITH CURRENT INSTALLATON CODES Gas Piping Do not install any gas piping above the bottom line of the access panel This is required for servicing of the slide out burner tray assembly 1 Suggested pipe sizing for direct line from meter or propane tank is found in Table III These sizes are based on 6 to 7 w c pressure at the meter for natural gas 11 w c for propane gas with 3 W C pressure drop schedule 40 pipe and fittings TABLE Ill Input in 1000 s Maximum Distance BTU Hr from Meter Natural Propane 50 feet 7 100 to125 EE os 60 feet T DA 19010 175 100 feet 1 1 30 feet 1 DA 200 to 250 120 feet 14 1
23. he unit from sagging DO NOT SLING UNDER PLENUMS OUTDOOR ONLY FOR LIFTING See Figure A Page 3 On units with either inlet or discharge plenums or both suitable slings must be provided for support beneath the unit s 4 high base frame A minimum of four support slings are required Additional sling supports may be needed for long pieces of equipment See Figure A Page 3 WARNING The mechanical or structural engineer should be contacted before moving unit across the roof deck STORAGE If equipment is not installed within 5 days after receipt the equipment must be stored in a dry environment and free of rodents 1 INSTALLATION The unit may be installed on a field fabricated mounting frame or support a factory roof curb mounting frame or a slab The following items are important in this regard Be sure that roof joist or support will not interfere with discharge and return air ducts Be sure frame or support is square level and not twisted Field fabricated frame support or slab must be high enough to prevent any form of moisture from entering unit All joints on frame must be sealed with caulking compound Field fabricated curb should be insulated with at least 1 72 thick rigid type insulation The roof curb should be counterflashed and sealed before unit is installed Standard flashing and mopping procedures are recommended for curb openings and gas and electrical roof penetrations Deck curb available to provide c
24. heat exchanger and not on unit front cabinet Failure to properly install could cause fire explosion damage to equipment or even death Venting 1 IS indoor duct furnaces Venting must be installed by a qualified installer in accord ance with all local codes In the absence of local codes venting must be installed in accordance with the latest edition of the National Fuel Gas code ANSI Z223 1 NFPA 70 Part 7 venting of equipment In Canada venting must be in accordance with the latest edition of the Natural Gas Installation Code CAN CGA B149 1 propane installation code CAN CGA BA49 2 A built in power venter is provided do not connect into any additional mechanical draft systems operating under a positive pressure Improper installation can create a hazardous condition such as explosion fire carbon monoxide poisoning resulting in property damage personal injury or death INSTALLATION e Regulations Installation of this appliance must conform to applicable federal state and local codes and regulations and with guidelines established by C GA Canadian Gas Association NFPA National Fire Protection Association N E C National Electrical Code the National Board of Fire Underwriters and CAN CGA B149 Listed are codes appearing in this text the Associations and their addresses where they may be obtained 1 Intertek Testing Services NA Inc E T L 2 AI NFPA codes National Electrical Code Contact Intertek Tes
25. heck for slipping belts and proper blower speed plugged filters if used dirty blower impeller blades or any airflow obstructions and excessive system static pressure Correct as necessary 5 Poor air flow patterns through furnace Check for even flow of air across heat exchanger ie turning vanes required if elbow is near inlet of furnace e Resonance on L P Gas Units 1 Reduce gas input slightly If condition persists consult manufacturer e Modulating or Two Stage Gas Controls 1 Consult manufacturer I TECHNICAL SERVICE Periodic service on any piece of mechanical equipment is necessary for efficient operation If a service problem arises Hastings HVAC Inc has a technical service organization available to provide professional assistance to help you with a solution to that problem Two inbound Watts lines to the home office enable you to consult with qualified factory service personnel For needed parts appliance data or assistance on a service problem contact the service department of Hastings HVAC Inc Also when ordering replacement parts be sure to specify the following 1 Model and serial number of unit 2 Type of gas or fuel 3 Make of electric valve and voltage To contact Hastings HVAC Inc Service Department outside of Nebraska call 800 228 4243 or 228 4270 or write Hastings HVAC Inc 3606 Yost Avenue Hastings Nebraska 68901 1966 Telephone 402 463 9821 or e mail service hastingshvac com
26. indicate to reestablish ignition This will maintain a steady discharge temperature even on days where outside temperature is within a few degrees of set point With the override option a room thermostat would be set approximately 5 F above the discharge dial set point thus allowing a lower modulating set point and saving fuel Example discharge dial set point 67 F room thermostat 72 F When the thermostat calls for a heat increase in the space a relay closes and connects two terminals on the amplifier causing the Maxitrol system to put the main burner at high fire This will last as long as it takes for the room thermostat to satisfy and open Because the discharge temperature is now above the discharge dial set point the burner will shut off until the temperature is within the set point of the discharge dial The unit will go back to its modulating mode VALVE ADJUSTMENTS See bulletin MT2035 for additional M MR valve information Note High Fire Adjustment should be checked whenever Low Fire Adjustment is changed Disconnect wire from amplifier terminal 3 remove cover plate 2 High Fire Adjustments Low Fire Adjustments A Using the maximum adjustment screw A Remove maximum adjusting screw 4 4 set manifold pressure to furnace spring 5 and plunger 8 A small mag manufacturer s specifications net is useful for this purpose B Replace cover plate 2 on Modulator CAUTION The plunger is a precisio
27. inlet pressure Regulate gas pressure or change supply pipe size to maintain proper inlet pressure Adjust pilot flame to surround end of flame rod about 3 8 inch See CLEANING instructions Check all manual gas cocks Inspect wiring connections Between ignition module and pilot valve or operator Correct as necessary Check low voltage across PV and V PV terminals on module If previous inspections are satisfactory replace pilot valve or operator If no or inadequate voltage is detected on module test replace module Check for line voltage low voltage power supply and transformer all wiring connections improper ground blown fuse in ignition module if applicable faulty high limit switch voltage leaks in igniter lead or cracked flame rod insulator and proper igniter sensor gap approximately 1 8 Correct as necessary If igniter still does not spark replace ignition module 18 NATURE OF TROUBLE 5 Improper pilot Flame either too small or flame lifts 6 System goes into safety lockout 100 lockout models ONLY e Venter Running But No Spark Or Pilot 1 Vent proving switches not made CORRECTIVE MEASURES If pilot is too small clean pilot line primary air openings and pilot orifice If flame lifts reduce gas pressure For both conditions adjust pilot flame to surround end of flame rod about 3 8 Flame must be soft and quiet Reset thermostat controller and try again for ignition To reset adjust th
28. ith an air distribution baffle assembly the air flow must enter the furnace from the baffle side If entering air is desired from the opposite side the baffle assembly must be relocated to that side of the heat exchanger High SCFM models do not require this baffle assembly and are recognized by the suffix letter H in the furnace model number Example IHRDV 400HME a High SCFM model furnaces require heating air temperature rise be maintained at between 10 to 60 F On units with the baffle assembly temperature rise must be maintained between 40 to 100 F Units must not be adjusted to obtain temp rise above these ranges b Instructions accompanying duct furnaces shall state that the installation is to be adjusted to obtain an air through put within the range specified on the appliance rating plate Filters if used must be cleaned or replaced as often as is necessary so as not to restrict air delivery Furnaces installed in areas of high air contamination may require FREQUENT cleaning Refer to section on CLEANING for recommended frequency The 1 IS HRDV furnaces are design certified for operation with modulating or two stage gas controls When either modulating or two stage controls are ordered a thermostatic type fan control switch must NOT be used With these gas controls constant fan operation simultaneous fan and gas valve operation or a fan time delay relay must be employed If a fan control is not used the blow
29. maintenance schedule depending on duty cycle Use a low pressure grease gun and avoid overgreasing SUGGESTED REGREASING INTERVALS SERVICE MOTOR HORSEPOWER UNDER 50 50 100 100 UP A 3 5 Yrs 2 4 Yrs 2 Yrs B 2 4 Yrs 1 1 2 Yrs 1 1 2 Yrs C 1 2 Yrs 1 yr 6 Mos D 4 Mos 4 Mos 3 Mos SERVICE SYMBOL TYPE OF SERVICE A Infrequent operation or light duty in clean atmosphere B 8 16 Hrs Day in clean relatively dry atmosphere C 12 24 Hrs Day heavy duty or if moisture is present D Heavy duty in dirty dusty locations high ambients moisture laden atmosphere vibration Recommended Greases Use the following greases or equivalent grease unless a special grease is specified on the nameplate MANUFACTURER CHEVRON SHELL TRADE NAME SR 2 DOLIUM R TROUBLE SHOOTING NATURE OF TROUBLE CORRECTIVE MEASURES e Pilot Fails to Light Flame Burns Erratically or Goes Out T Improper too high or low gas pressure at unit Obstruction in pilot line or orifice Inoperative pilot gas valve or valve operator No or inadequate spark across igniter sensor gap Make sure all manual gas cocks are open Check gas pressure at main valve to be certain it conforms to MINIMUM SUPPLY PRESSURE marked on the specification plate In any case pres sure is NOT to exceed 14 W C for natural or L P gas Regulate gas pressure or change supply pipe size to maintain proper
30. n Regulator valve and reconnect wire to part Handle carefully to avoid marring or amplifier terminal 3 picking up grease and dirt Do not lubricate B Using minimum adjusting screw 9 set manifold pressure to furnace manufac turer s specifications C Replace plunger and spring retainer spring and maximum adjusting screw in proper order TOP HOUSING COVER PLATE SEAL GASKET MAXIIUM ADJUSTMENT SCREW MAXIMUM ADJUSTMENT SPRING SOLENOID MINIMUM ADJUSTMENT SPRING PLUNGER MINIMUM ADJUSTMENT SCREW MINIMUM ADJUSTMENT SCREW STOP O o p ELECTRONIC IGNITION AI I IS HRDV series furnaces are equipped with a solid state design intermittent pilot ignition system This electronic system consists of an ignition control module combination pilot burner igniter sensor sensor or flame rod assembly and igniter sensor lead Activated by the units 24V transformer and controlled by a field installed thermostat or controller module will first perform a safe start check which tests its internal components for a false pilot flame condition If satisfactory the module then energizes the pilot gas valve to open and generates 15 000 V peak capacitive discharge ignition spark to ignite pilot burner When pilot is established the flame monitoring circuit of module responds to the presence of flame detected by the flame rod and discontinues ignition spark The main gas valve is then energized to open pilot lights main burners
31. nce inspection is completed replace the burner tray assembly and install the L locking bracket Failure to perform this inspection could result in fire explosion loss of warranty or even death a Firing rate must NOT be increased above the BTU input shown on the specification plate b Instructions shall state that the appliance shall be adjusted to the manifold pressure specified on the manufactuer s rating plate For U S installations at elevations above 2 000 feet 610 M the appliance shall be derated 4 percent for each 1 000 feet 305 M of elevation above sea level For Canadian installations appliances are certified for altitudes of O to 2 000 feet 0 610 M and 2 000 to 4 500 feet 610 1 370 M High altitude ratings may be obtained by a change in orifice size and or manifold pressure Contact the manufacturer or gas company before changing spud sizes or pressure regulator setting Use 75 inch socket wrench to remove spuds NOTE L P GAS UNITS ARE EQUIPPED WITH SPECIAL TAPER REAMED SPUDS WHICH MUST NOT BE RESIZED IN THE FIELD Air starvation is a common cause of heat exchanger burn out Air handling system design MUST POSITIVELY ASSURE adequate and evenly distributed air flow through the heat exchanger See ILLUSTRATIONS on page 14 The furnace must be installed downstream from or on the POSITIVE PRESSURE SIDE of the air circulating blower Air flow through the furnace may be in either direction However on units w
32. nd disconnect applicable electric wiring Remove retaining L tab at the end of the burner drawer and slide drawer assembly out of the furnace b Remove the screws holding top panel and lift panel off Remove the screws from bottom flange of the collector box cover and lift cover off Remove the screws from bottom flange of the collector box Remove the two screws from the venter motor support at the right heater leg and disconnect the three conductor cables at the junction box Lift collector box off Power venter assembly will remain attached to the collector box oo 1 e Lift flue baffles from tubes Clean the inner surfaces of flue tubes using a 1 1 2 or 1 3 4 long handled wire brush Clean and reinstall flue baffles g Remove dirt from bottom pan and clean burners before reinstalling drawer assembly Be sure to reinstall L tab after drawer assembly is installed in the heater Indoor Units a Disconnect exhaust flue from unit flange b Disconnect separated combustion air flue from unit flange IS models only c Remove the 4 screws holding the top portion of the burner control vestibule door around the power venter outlet d Remove burner control vestibule door by turning bottom latches on door e Pull the door away by pulling the bottom rail on the door outward On some models a 2 piece door is provided 2 screws hold the top portion of the door in place Remove screws and remove top door portion g R
33. orrect wiring connections between module and main gas valve 4 System goes into safety lockout See item 6 of Pilot Fails to Light in this section 100 lock out models ONLY 5 Faulty ignition module If all previous checks are satisfactory and burners continue to shut down replace module e Call for Heat Ends But Main Burners Continue Operation 1 Faulty thermostat controller or short Repair or replace circuit in respective wiring 2 Main gas valve stuck in open position or Remove MV lead at ignition module If valve does not inoperative module close replace valve or operator as necessary If main gas valve and thermostat controller are okay replace module e Delayed or Rough Ignition 1 Obstruction in main burner spuds Remove spuds clean and replace 2 Burners covered with foreign matter Clean burners See CLEANING on pages 15 and 16 e Burner Flames Flashback and Burning at Spuds 1 Gas input too low Adjust pressure regulator or increase supply pipe size to unit It may be necessary to consult gas company 2 Burners or flue tubes covered by foreign See CLEANING on pages 15 and 6 If faulty consult matter manufacturer e Burner Flames Are Yellow or Tend to Float under Flue Tubes 1 Gas input too high due to oversize main Consult manufacturer for proper spud size be burner spuds or gas supply pressure in fore changing or gas company before adjusting regul excess of 8 ounces approximately 14
34. overed island under complete unit with openings for supply and return air Duct furnace must be installed on the positive side of air supply blower The blower must provide air through put within range specified on the appliance spec plate The discharge and return air duct if required should be correctly sized for securing to factory installed plenums when provided or to unit Duct connection s exposed to the weather must be watertight A weather tight seal must be provided where duct s comes through the roof A duct furnace shall be installed with an inlet duct which will provide air distribution equivalent to a straight run of duct having the same cross sectional area as the inlet connection and not less than 2 equivalent diameters in length our IFTING CHAIN TO CRANE FIGURE A UK UK UIQ AY RAK WM IFTING STRAPS UNDER BASE FRAME AU UK UO A SPREADER BAR 4 Installation of duct furnaces shall specify that the ducts connected to the duct furnace shall have removable access panels on both upstream and downstream sides of the duct furnace These openings shall be accessible when the appliance is installed in service and shall be of such size that smoke or reflected light may be observed inside the Casing to indicate the presence of leaks in the heating element The cover for the opening shall be attached in such a manner as to prevent leaks
35. ration systems CLEARANCES INSTALLATIION Indoor Models The minimum clearances from combustible material are as follows Control Side Width of Unit Opposite Control Side 6 inches 18 recommended for servicing Top of Unit 6 inches Discharge and Return Air Sides 12 inches Bottom 0 inches For installation downstream from refrigeration systems See section on ILLUSTRATIONS for dimensions of individual furnaces 6 10 11 D Install in airplane hangars in accordance with the current ANSI NFPA 409 Latest Revisions Standard on Aircraft Hangars and in public garages in accordance with the current ANSI NFFPA BB Latest Revisions Standards for Garages and with CANI B149 Codes A clearance of 10 feet must be provided from the bottom of the heater to the top surface of wings or engine enclosures of the highest aircraft to be housed in the hangar and a minimum clearance of 8 feet from the door in other sections such as offices and shops connected with hangar and in public garages Also the heaters must be so located that they will be protected from damage by aircraft cranes scaffolding etc and must be accessible for servicing and adjustment Standard ANSI NFPA 88 A B Latest revisions specifies that the heater must be so located that the clearance to combustible materials conform with NFPA Nos 52 and 54 and that such material must not attain a temperature over 160 by continued operation of the heater
36. s required for I and IS units when using 4 inch vent pipe When possible locate horizontal vent hoods that do not face the direction of prevailing winds to diminish the possibility of back draft situations For U S A standards vent systems must conform to the latest edition of the National Fuel Gas Code NFPA 54 and the latest edition of NFPA 211 or as follows Notless than 7 feet above grade when located adjacent to public walk ways At least 3 feet above any forced air inlet located within 10 feet At least 4 feet below 4 feet horizontally from or 1 foot above any door window or gravity air inlet into any building At least 1 foot above grade or at least 1 foot above the normally expected snow accumulation level Directed such as to not jeopardize people At least 4 feet from electric meters gas meters regulators and relief equipment Sealing or shielding of exposed surfaces with a corrosion resistant material may be required to prevent staining or deterioration of building materials and Not less than 2 feet from an adjacent building In Canada vent systems must conform to the latest edition of the Natural gas and Propane Installation Code CAN CGA B149 1 or CAN CGA B149 2 or as follows A venting system shall not terminate underneath a veranda porch or deck or above a paved sidewalk or a paved driveway that is located between two buildings and that serves both buildings The exit terminals of mechanical draft
37. st 2 Clean ribbon with brush and blow off dust 3 4 Reinstall burners making certain that they seat properly in place Failure to re seat burner assemblies properly could result in fire explosion equipment damage or death e Cleaning Pilot 1 Or F Disconnect tubing from pilot body remove igniter lead and detach pilot burner assembly from support Remove pilot orifice fitting Using a small brush clean pilot burner assembly orifice and flame rod Blow off loose particles Assemble and install in original position Adjust pilot flame to surround flame rod tip about 3 8 Flame must be soft not hard noisy or yellow e Additional Maintenance Procedures 1 2 3 4 Motors should be relubricated according to the manufacturer s lubrication instructions Filters must be cleaned cleanable type or replaced throwaway type with like filters as often as necessary so as not to restrict air delivery Twice a year check belts and sheaves for alignment and belt tension When a belt is replaced shorten center distance between sheaves by loosening motor bolts and sliding motor on support On units requiring multiple belts use a matched set 16 5 The following procedure is recommended for tensioning belts A Measure span length X shown in Figure l B At the center of span length X apply a force perpendicular to the span and large enough to deflect belt 1 64 for each inch of span length E
38. stream of the gas supply connection to the appliance POLT s 12 9 The furnace must NOT be operated without a leak limiting orifice installed in the unit pressure regulator vent if applicable 10 The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 75 PSIG 11 The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 72 PSIG NOTE CHECK ALL GAS CONNECTIONS FOR LEAKS A SOAP SOLUTION SHOULD BE USED FOR THIS PURPOSE NEVER USE A TORCH OR FLAME OF ANY KIND PURGING GAS Refer to NFPA 54 2012 edition or later on procedures for proper gas purging Unit main disconnect to be under lock out tag out procedure applied prior to purging CAUTION Use an electronic combustible gas indicator as air is purged Do not depend on sensing the odor of gas to determine if the gas line is purged TABLE IV Unit BTU Hr Input Total BTU Hr Total BTU Hr per Heater Input Output IH ISH H HRDV 100 100 000 100 000 76 000 80 000 IH ISH H HRDV 125 125 000 125 000 95 000 100 000 IH ISH H HRDV 160 160 000 160 000 121 600 128 000 IH ISH H HRDV 210 210 000 210 000 159 600 168
39. systems shall not be less than 2 14m above grade when located adjacent to a paved sidewalk or driveway A venting system shall not direct flue gases towards brickwork siding or other construction in such a manner that may cause damage from heat or condensate from the flue gases A vent system shall not direct flue gases so as to jeopardize people overheat combustible structures or enter buildings VENTING INDOOR DUCT HEATER WITH SEPERATED COMBUSTION OR INDOOR HEATING HEATING COOLING SYSTEMS EXHAUST APPROVED CAP COMBUSTION AIR INLET 2 FT ABOVE INSTALLATION PARAPET WALL VERTICAL HORIZONTAL FLUE PIPE Eng POSITIVE PRESSURE VENT FLUE REQUIRED INSIDE BUILDING 6 6 DIA VENT PIPE TYPE B RECOMMENDED IF EXHAUST FAN IS USED DURING THE HEATING SEASON PROVIDE ADEQUATE MAKE UP AIR AND COMBUSTION AIR INSTALL IN AIRPLANE HANGARS IN ACCORDANCE WITH CURRENT NFPA NO 409 STANDARD ON AIRCRAFT HANGARS AND IN PUBLIC GARAGES IN ACCORDANCE WITH CURRENT SUPPORT RODS NFPA NO 88 STANDARD FOR GARAGES SEE PAGE 4 FOR DETAILS VERTICAL FLUE PIPE CLEARANCES INSTALLATION INDOOR MODELS THE MINIMUM CLEARANCES FROM COMBUSTIBLE MATERIAL ARE AS FOLLOWS CONTROL SIDE WIDTH OF UNIT OPPOSITE CONTROL SIDE 6 INCHES TOP OF UNIT 6 INCHES BOTTOM 0 INCHES TERMINATION SUPPORT STRAPS REQUIRED EVERY 5 FEET HORIZONTALY TEE W SCREEN AND AT ELBOWS TO PREVENT SAGGING TEE WTH CONDENSATE DRAIN FITTING HORIZ
40. ting Services NA Inc Contact National Fire Protection Association Inc 165 Main Street Batterymarch Park Cortland New York 13045 Quincy Massachusetts 02269 3 Standard of National Board of Fire Underwriters 4 Canadian Gas Association Contact National Board of Fire Underwriters Contact Canadian Gas Association 85 John Street 178 Rexdale Boulevard New York New York 10036 Etobicoke Ontario Canada M9W 1R3 LOCATION NOTE AMERICAN INSTALLATIONS MUST CONFORM WITH THE NATIONAL FUEL GAS CODE AMERICAN NATIONAL STANDARD ANSI Z223 1 NFPA54 Latest Revisions AND ALL APPLICABLE GOVERNING BUILDING CODES CANADIAN INSTALLATIONS MUST CONFIRM WITH CAN CGA B149 Latest Revisions THE INSTALLATION SHALL CONFORM WITH LOCAL BUILDING CODES OR IN THE ABSENCE OF LOCAL CODES WITH THE NATIONAL FUEL GAS CODE ANSI Z223 1 NFPA 54 OR THE NATURAL GAS AND PROPANE INSTALLATION CODE CSA B149 1 1 The duct furnace has been designed for INDOOR OR OUTDOOR INSTALLATIONS 2 Refer to items 1 2 5 6 9 10 12 15 and 16 of INSTALLATION PRECAUTIONS 3 REQUIRED MINIMUM CLEARANCES to combustible material are as follows CLEARANCES INSTALLATION Outdoor Models The minimum clearances from combustible material are as follows Control Side Width of Unit Opposite Control Side 6 inches 18 recommended for servicing Top of Unit Unobstructed Discharge and Return Air Sides 12 inches Bottom 0 inches For installation downstream from refrige
41. xample The required deflection for a 40 span would be 40 64 or 5 8 C Compare the force applied with the values given in Table V If force is between the minimum and maximum range shown the drive tension should be satisfactory A force below the minimum value indicates an undertensioned belt and a force that exceeds the maximum value indicates an overtensioned belt 6 Lubricate main fan bearing with a high grade lithium base grease Perform at least every quarter three months or schedule according to equipment use TABLE V Belt Cross Section Motor Pulley Pitch Deflection Force marked on belt Diameter Minimum Maximum 3 0 3 6 2 62 lbs 3 25 Ibs A 3 8 4 8 3 Ibs 4 Ibs 5 0 7 0 3 25 lbs 5 Ibs 3 4 4 2 3 Ibs 5 Ibs B 4 4 5 6 4 Ibs 5 87 lbs 5 8 8 6 5 25 lbs 7 87 lbs FIGURE 1 DEFLECTION 1 64 PER INCH OF SPAN LUBRICATION INSTRUCTIONS FOR MOTORS Some small motors have sealed for life bearings which require no relubrication Regreasable bearings are shipped with a high quality wide temperature range grease in the bearings Motors can be regreased by stopping the motor removing drain plug and pumping new grease into fill hole Run motor with drain plug removed until excess grease has been discharged minimum 10 min Stop motor and replace drain plug Units that operate at speeds greater than 1800 RPM should be lubricated on a more frequent

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