Service and Maintenance Instructions
Contents
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6. J I TEST TWIN aN Ol OO UO 688 n 3 AMP FUSE ts EP COOL HEAT 47 7 4 24 V THERMOSTAT TERMINALS HUMIDIFIER TERMINAL 24 VAC 0 5 AMP MAX LED OPERATION amp DIAGNOSTIC LIGHT HARNESS CONNECTOR 24 V TRANSFORMER SEC 2 SPARE 1 BLOWER SPEED SELECTION TERMINALS SPARE 2 EAC ELECTRONIC AIR CLEANER TERMINALS 115 VAC 1 5 AMP MAX ai EAC 1 V A 115 VAC L1 EAC 2 POWER SUPPLY 115 VAC L2 NEUTRAL CONNECTION HOT SURFACE INDUCER MOTOR IGNITOR CONNECTOR CONNECT A95086 Fig 11 Control Board 9 982967 V 101 958206 S VNIWH3L L93NNOO 30 45 3AVH AYN S THQOW INOS 1 lt m QuvOglInOHIO 80 ST300 NO SI 57 HOLIMS AYYNIXNY 013601 N3HM 1 gt MS dW3l QVO Td3AO HOLOW TWNHALNI 1 5 10 SHNOH 33uH1 H31JV L3S3Y OLAW TOXLNOD NOILINDI YO4 STWIY Pras qu t 1434 1 HOLMS _ S1
7. deiner TER d 1V3H SQNOO3S HO 081 56 06 ONILV3H SVO 430 H3MO 8 0 NOUS ES D 80 09 5 2 1 SINOO3S Sr SVO AY130 NO H3MOT8 6 WNIIH31 07314 070 1845 AvidH L4VEG T wave 9 NOLLO3NNOO 2 WnH daSN LON Sd91N3HM Q3103NNOO AHOIOV3 9 2 ONIMIM 07314 O N LSdS AvidH HOLINDI 307386 LOH YISH OVASI ONTHIM OWA SLL HOLIND 30 85 LOH 193130 OL 1OHLNOO WWILAWLSSHS OL Q3193NNOO LSAW 3HIM SIHL S mtt 1046 Av13H 0334 HOLOW OTIH XO8 AHOLOV ON ISdQ AVIHH3ATVASVO JHL ANY HOLIMS LOANNOOSIC SHL N33MI3S H3ddOO AINO ISN INVONQO3H 3ATVA SVO 02185 09395 WNWILdO 5117130 SNOILONYLSN 13114406 G3TIVISNI 01314 NOLLVTIV LSNI 335 SNOILIGNOO H04 SNOLOGTES DEUS oH 3 01 8 NINH 824 a AGG Send 204 10 SAHOLIMS QYOTHSA TWINH3H 1363 1 TWNYALNI NIVLNOO SHOLON Wal ZIVNIABIECEDIBNANTE O E i 300419973 NIAOYd 3 V14 354 901 SYIM IS
8. N3HM OAS SEI I ne oas 6 E BA 9 31ON n M IN3WaIno3 5 NHO o Ol 3LON 336 SVD TWHNLYN vit ILON Sud QNS 5 5 m uon Od OLLYWaHODS _ LOSNNOOSIG OVASH OL N3HM _ 1 ______ __ 10 SERVICE LED CODE STATUS CONTINUOUS OFF Check for 115VAC at L1 and L2 and 24VAC at SEC 1 and SEC 2 CONTINUOUS ON Control has 24V power RAPID FLASHING Line voltage 115V polarity reversed If twinned refer to twinning kit instructions EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST DIGIT DETERMINED BY THE NUMBER OF SHORT FLASHES AND THE SECOND DIGIT BY THE NUMBER OF LONG FLASHES 11 12 13 14 21 22 23 24 31 NO PREVIOUS CODE Stored status codes are erased when power 115V or 24V to control is interrupted or 48 hours after each fault is cleared BLOWER ON AFTER UP 115V or 24V Blower runs for 90 seconds if unit is powered up during a call for heat R W closed LIMIT OR FLAME ROLL OUT SWITCH LOCKOUT Auto reset after three hours Flame roll out switch requires manual reset Refer to 33 IGNITION LOCKOUT Co
9. NOTE The materials needed in items 1 and 2 can usually be purchased at local hardware stores A 3 Insert twisted wire end of brush into end of steel spring cable and crimp tight with crimping tool or strike with ball peen hammer TIGHTNESS is very important 4 Remove metal screw fitting from wire brush to allow insertion into cable b Clean each heat exchanger cell 1 Attach variable speed reversible drill to end of steel spring cable end opposite brush 2 Insert brush end of cable into upper opening of cell and slowly rotate with drill DO NOT force cable Gradually insert at least 36 in of cable into 2 upper passes of cell See Fig 8 3 Work cable in and out of cell 3 or 4 times to obtain sufficient cleaning DO NOT pull cable with great force Reverse drill and gradually work cable out 4 Remove burner assembly and cell inlet plates CAUTION Be very careful when removing the burner assembly to avoid breaking the ignitor See Fig 9 for the correct ignitor location 10 11 12 5 Replace screws in center panel and cells before cleaning 6 Insert brush end of cable in lower opening of cell and proceed to clean 2 lower passes of cell in same manner as 2 upper passes 7 Repeat foregoing procedures until each cell in furnace has been cleaned 8 Remove residue from each cell using vacuum cleaner 9 Clean burner assembly using vacuum cleaner with soft brush attachment 10
10. Loosen screw in strap holding motor capacitor to blower housing and slide capacitor out from under strap 8 Mark blower wheel motor and motor support in relation to blower housing before disassembly to ensure proper reassembly 9 Loosen setscrew holding blower wheel on motor shaft 10 Remove bolts holding motor mount to blower housing and slide motor and mount out of housing Disconnect ground wire attached to blower housing before removing motor 11 Lubricate motor when oil ports are provided a Remove dust caps or plugs from oil ports located at each end of motor b Use a good grade of SAE 20 nondetergent motor oil and put 1 teaspoon 5 cc 3 16 oz or 16 to 25 drops in each oil port Do not over oil c Allow time for total quantity of oil to be absorbed by each bearing d Wipe excess oil from motor housing e Replace dust caps or plugs on oil ports 12 Remove blower wheel from housing a Mark cutoff location to ensure proper reassembly b Remove screws holding cutoff plate and remove cutoff plate from housing c Lift blower wheel from housing through opening 13 Clean blower wheel and motor using a vacuum cleaner with soft brush attachment Do not remove or disturb balance weights clips on blower wheel blades The blower wheel should not be dropped or bent as balance will be affected 14 Reinstall blower wheel by reversing items 12 a through c Be sure wheel is positioned for proper rotation 15 Reassemble moto
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12. identify unsafe practices which would result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation N WARNING The ability to properly perform maintenance on this equipment requires certain expertise mechanical skills tools and equipment If you do not possess these do not attempt to perform any maintenance on this equipment other than those procedures recommended in the User s Manual FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE TO THIS EQUIPMENT SERIOUS PERSONAL INJURY OR DEATH ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDURE N CAUTION Electrostatic discharge can affect electronic components Take precautions during furnace installation and servicing to protect the furnace electronic control Precautions will prevent electrostatic discharges from personnel and hand tools which are held during the procedure These precautions will help to avoid exposing the control to electrostatic discharge by putting the furnace the control and the person at the same electrostatic potential 1 Disconnect all power to the furnace DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE CONTROL PRIOR TO DISCHARGING YOUR BODY S ELECTROSTATIC CHARGE TO GROUND 2 Firmly touch a clean unpainted metal surface of the furnace chassis which is close to the control Tools held in a person s hand during grounding will be satisfactori
13. or 2 filters which are installed in the blower compartment See Fig 6 To remove filters for cleaning or replacement proceed as follows a Disconnect electrical power before removing access doors b Remove blower and control access doors c Release filter retainer from clip at front of furnace casing See Fig 6 For side return clips may be used on either or both sides of the furnace d Slide filter s out e Furnaces are equipped with permanent washable filters Clean filters with tap water Spray water through filter in opposite direction of airflow f Rinse and let dry Oiling or coating of filter is not recommended or required g Reinstall filter s h Replace blower and control access doors i Restore electrical power to furnace B Blower Motor and Wheel For long life economy and high efficiency clean accumulated dirt and grease from the blower wheel and motor annually The following steps should be performed by a qualified service technician Some motors have prelubricated sealed bearings and require no lubrication These motors can be identified by the absence of oil ports on each end of the motor For those motors with oil ports lubricate motor every 5 years if motor is used on intermittent operation thermostat FAN switch in AUTO position or every 2 years if motor is in continuous operation thermostat FAN switch in ON position NOTE Remember to disconnect the electrical supply before removing access do
14. 2 3 Remove vent pipe enclosure downflow horizontal furnace only and disconnect vent pipe from relief box 4 Remove 2 screws that secure relief box See Fig 6 or 7 5 Disconnect wires to the following components a Draft safeguard switch c Inducer motor c Pressure switch d Limit overtemperature switch es e Gas valve f Hot surface ignitor g Flame sensing electrode 6 Remove 8 screws that secure flue collector box to center panel Be careful not to damage sealant 7 Remove complete inducer assembly from furnace exposing flue openings 8 Clean cells using field provided small wire brush steel spring cable reversible electric drill and vacuum cleaner a Assemble wire brush and steel spring cable 1 Use 48 in of 1 4 in diameter high grade steel spring cable commonly known as drain clean out or Roto Rooter cable 2 Use 1 4 in diameter wire brush commonly known as 25 caliber rifle cleaning brush m 13 32 11 52 BURNER CELL a PANEL HOT SURFACE IGNITOR ASSEMBLY JN M N a 3 15 E 77 IGNITOR T g BURNER ae a IGNITOR ASSEMBLY 91252 93347 Fig 8 Cleaning Heat Exchanger Cell Fig 9 Position of Ignitor to Burner
15. N 139 V 133 SI 3HIM LNIWAdINOI JHL 40 ANY 41 71 m WNW MS SILON OVAFO ON ANS LL H3INHOJSNVHLL XVIN 571 OVA SLL NOLLO3NNOO HIV OINOH1O313 1 0 3 ca 1 TWNINYAL NIML 8 1531 INANOdINOD NIMLIIS3L ARE ON RO ED paa 2 07 1845 HOLIMS 3unisS3ud Sud HOllOvdVO Gasn LON porum j YOLOANNOD YOLOW WIS LINDYIO bs ON 1sds HOLOWH3MOT8 HMW18 Isi 824 070 1845 13539 TWANVWW dINSLYSAO HOLIMS Sv 9 LINDHIO 6 IN3931 SH 310N lt lt H Tom dus gt I Wa vr 5 WHLNAN L 1381 NIH znd 97 Le pan cct J v 3LON a034 N3HM HOLIMS 1 ow JO3NNOOSIG 35 4 gp Sud Tp 351 E WOO LHM 1 a CHIM ous ld 17 um me ov 0 1935 JLON 2236 mas zauvdS LV3H Ind Pa eg LON red SELON 05345 TET REN 1085 famaj 1000 5 3snd Jina lt lt 92 OVASIL eire us 2085 1035 9 1583 209 gsx eee ad 5 THM 555 985 922 E Lg d OAS 084 de We 282 dau 999 i n
16. Reinstall cell inlet plates and burner assembly Care must be exercised to center the burners in the cell openings After cleaning flue openings check sealant on flue collector to ensure that it has not been damaged If new sealant is needed contact your dealer or distributor Clean and replace flue collector assembly making sure all 8 screws are secure Reinstall relief box Reconnect wires to the following components a Draft safeguard switch b Inducer motor 6 Pressure switch d Limit overtemperature switch es e Gas valve f Hot surface ignitor g Flame sensing electrode 13 Reconnect vent pipe to relief box Replace vent pipe enclosure downflow horizontal furnace only 14 Replace blower access door only 15 Turn on electrical power and gas 16 Set thermostat and check furnace for proper operation N WARNING Never use a match or other open flame to check for gas leaks Use a soap and water solution A failure to follow this warning could result in fire personal injury or death 17 Check for gas leaks 18 Replace control access door on upflow furnace 19 On downflow horizontal furnaces remove blower access door replace control access door first then replace blower access door and secure with screw in front of door D Electrical Controls and Wiring N CAUTION There may be more than 1 electrical supply to the unit Check accessories and cooling unit for additional electrical supplies
17. Service and Maintenance Instructions HSI Mid Efficiency GB1AAV Induced Combustion Furnaces GB3AAV Sizes 045 thru 155 Series E EA 94087 Fig 1 Model GB3AAV Horizontal QUUD EFFICIENCY Ss RATING d cc c3 CERTIFIED 93 Ski csc ama N APPROVED NG aoa cs ae A94086 A94085 Fig 2 Model GB3AAV Fig 3 Model GB1AAV Downflow Upflow NOTE Read the entire instruction manual before performing any service or maintenance Index Page CONSIDERATIONS eset oet hives a ettet pede tbe eb e eet s 1 2 ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDURE bi EE iun Li A E an Cie 2 CARE AND MAINTENANCE 2 8 Air Filter Arrangement Blower Motor and Wheel 23 5 Cleaning Heat Excliatniger 2 p REPRE B C BU 5 7 BlectricalControls and Wirmg z eso ee ERS e in RUE 7 8 Troubleshooting Unmt Wirng d ON n De NR D RI Ue n NE nt HD bue e tes 10 Service Labels Rote ee addere bei a ge e pepe tat cedant 11 Troubleshooting Guilde titer itt tmt ee e ie RV C ERI eon te RE o cate ove 12 13 SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas
18. The electrical ground and polarity for 115 v wiring must be maintained properly Refer to Fig 10 for field wiring information and to Fig 12 for unit wiring information NOTE If the polarity is not correct the STATUS LED on the control center will flash rapidly and prevent the furnace from operating The control system also requires an earth ground for proper operation of the control board and flame sensing electrode The 24 v circuit contains an automotive type 3 amp fuse located on the control board See Fig 11 Any direct shorts of the 24 v wiring during installation service or maintenance will cause this fuse to blow If fuse replacement is required use ONLY a fuse of identical size With power to the unit disconnected check all electrical connections for tightness Tighten all screws on electrical connections If any smoky or burned connections are found disassemble the connection clean all parts strip wire and reassemble properly and securely Reconnect electrical power to the unit and observe unit through 1 complete operating cycle Electrical controls are difficult to check without proper instrumentation if there are any discrepancies in the operating cycle contact your dealer and request service For an explanation of fault codes refer to service label located on blower access door or Fig 13 and the troubleshooting guide The control center stores 1 fault code the last fault to occur for a period of 48 hrs or until the 115
19. and electrical components Only trained and qualified personnel should install repair or service heating equipment Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters All other operations must be performed by trained service personnel When working on heating equipment observe precautions in the literature on tags and on labels attached to or shipped with the unit and other safety precautions that may apply Follow all safety codes In the United States follow all safety codes including the National Fuel Gas Code NFGC NFPA No 54 1992 ANSI Z223 1 1992 In Canada refer to the current edition of the National Standard of Canada CAN CGA B149 1 and 2 M91 Natural Gas and Propane Installation Codes NSCNGPIC Wear safety glasses and work gloves Have fire extinguisher available during start up and adjustment procedures and service calls Form SG GB1A 06 Cancels SG GB1A 05 Printed in U S A 7 95 Catalog No 92 33GB 1A14 Recognize safety information This is the safety alert symbol When you see this symbol on the furnace and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies a hazard which could result in personal injury or death CAUTION is used to
20. ble 0716 20 1 Cleanable 24 1 2 2 16 X 20 X 1 Cleanable Table 2 Filter Size Information for Upflow Furnaces In FURNACE FILTER QUANTITY AND SIZE FILTER CASING WIDTH TYPE 14 3 16 1 16 X 25 X 1 D14 X25X1 Cleanable 17 1 2 1 16 X25 X 1 1 16X25X1 Cleanable 16X25 1 20x25 X I Cleanabte 24 1 2 2 16 X 25 XK 1 1 24 X 29 X 1 Cleanable Factory provided with the furnace Filter may be field modified as required by cutting to desired size A WARNING Never operate unit without a filter or with filter access door removed A failure to follow this warning could result in fire personal injury or death 1 Downflow Horizontal Each furnace requires 2 filters which are installed in the return air duct See Fig 4 and 5 To remove filters for cleaning or replacement proceed as follows a Disconnect electrical power before removing blower access door b Remove screw from front of door and remove blower access door c Reach up behind top plate tilt filters toward center of return air plenum remove filters and clean as needed Replace if torn d Furnaces are equipped with permanent washable filters Clean filters with tap water Spray water through filter in opposite direction of airflow e Rinse and let dry Oiling or coating of filters is not recommended or required f Reinstall filters g Replace blower access door h Restore electrical power to furnace 2 Upflow Each furnace requires 1
21. ds plastic or plastic containers gasoline kerosene cigarette lighter fluid dry cleaning fluids or other volatile fluids 3 Paint thinners and other painting compounds paper bags or other paper products A failure to follow this warning could result in corrosion of the heat exchanger fire personal injury or death A WARNING Turn off the gas and electrical supplies to the unit before performing any maintenance or service Follow the operating instructions on label attached to furnace A failure to follow this warning could result in personal injury The minimum maintenance that should be performed on this equipment is as follows 1 Check and clean air filter each month or more frequently if required Replace if torn 2 Check blower motor and wheel for cleanliness each heating and cooling season Clean and lubricate as necessary 3 Check electrical connections for tightness and controls for proper operation each heating season Service as necessary A CAUTION As with any mechanical equipment personal injury can result from sharp metal edges etc therefore be careful when removing parts RE M A Air Filter Arrangement The air filter arrangement may vary depending on the application Refer to Table 1 or 2 for filter size information Table 1 Filter Size Information for Downflow Horizontal Furnaces In FURNACE FILTER QUANTITY FILTER CASING WIDTH AND SIZE TYPE 14 3 16 214 20 1 Cleanable 17 1 2 2 14K 20X1 Cleana
22. ly discharged 3 After touching the chassis you may proceed to service the control or connecting wires as long as you do nothing that recharges your body with static electricity for example DO NOT move or shuffle your feet DO NOT touch ungrounded objects etc 4 If you touch ungrounded objects recharge your body with static electricity firmly touch furnace again before touching control or wires 5 Use this procedure for installed and uninstalled ungrounded furnaces 6 Before removing a new control from its container discharge your body s electrostatic charge to ground to protect the control from damage If the control is to be installed in a furnace follow items 1 through 5 before bringing the control or yourself into contact with the furnace Put all used AND new controls into containers before touching ungrounded objects 7 An ESD service kit available from commercial sources may also be used to prevent ESD damage CARE AND MAINTENANCE For continuing high performance and to minimize possible equipment failure it is essential that periodic maintenance be performed on this equipment Consult your local dealer as to the proper frequency of maintenance and the availability of a maintenance contract N WARNING Never store anything on near or in contact with the furnace such as 1 Spray or aerosol cans rags brooms dust mops vacuum cleaners or other cleaning tools 2 Soap powders bleaches waxes or other cleaning compoun
23. ntrol will auto reset after three hours Refer to 34 GAS HEATING LOCKOUT Control will NOT auto reset Check for Stuck gas valve relay on control or miswire to gas valve circuit ABNORMAL FLAME PROVING SIGNAL Flame is proved while gas valve is de energized Inducer will run until fault is cleared Check for Stuck open gas valve or leaky gas valve PRESSURE SWITCH DID NOT OPEN Check for Obstructed pressure tubing Defective pressure switch stuck closed SECONDARY VOLTAGE FUSE IS OPEN Check for Short circuit in secondary voltage 24V wiring PRESSURE DRAFT SAFEGUARD OR AUXILIARY LIMIT when used SWITCH DID NOT CLOSE OR REOPENED If open longer than five minutes inducer shuts off for 15 minutes before retry Check for Proper vent sizing and condensate pitch Inadequate Combustion air supply Vent restriction or high winds Low inducer voltage Defective inducer motor or start capacitor Disconnected or obstructed pressure tubing Defective pressure switch or connections If it opens after trial for ignition period blower will come on for 90 second recycle delay LIMIT OR FLAME ROLL OUT SWITCH IS OPEN If open longer than three minutes code changes to 13 Check for Defective blower motor or start capacitor Dirty filter or restricted duct system Loose blower wheel Defective switch or connections Inadequate Combustion air supply Flame Roll out Switch only Open Flame Roll out and switch manual re
24. or 24 v power is interrupted NOTE Removing blower access door will open blower access door switch and terminate 115 v power to control center and fault code will be erased Look into blower access door sight glass for current LED status To retrieve fault code proceed with the following NOTE NO thermostat signal may be present at control center and all blower time delay off periods must be completed a Leave 115 v power to furnace turned on b Look into blower access door sight glass for current LED status NOTE Leave blower access panel installed to maintain power to control center to view current LED status c Remove control access door d BRIEFLY remove either wire from the main limit switch until LED goes out then reconnect it NOTE If wire to main limit is disconnected longer than 4 sec main blower starts and retrieval request is ignored 2 When above items have been completed the following will occur LED flashes a fault code 4 times Record this fault code for further troubleshooting a b Inducer motor operates for 10 sec then turns off e Hot surface ignitor is energized for 15 sec then de energized d Main blower operates at cooling speed for 10 sec then turns off e Main blower operates at heating speed for 10 sec then turns off Items a through e above will assist in furnace troubleshooting since all components are functionally operated except the gas valve This procedure is also referred to as Com
25. ors pak ee cA AIRFLOW PUES INSTALLATION POSITION OF FILTERS RETURN AIR PLENUM BR Tm TON pn hl TAI n J AIRFLOW P oF ACCESS DOOR SSS A94307 A88486 Fig 4 Horizontal Filter Arrangement Fig 5 Downflow Filter Arrangement MOUNTING DPA URBE ENCLOSURE pas LIMIT lt E T W SWITC WHEN USED 7 BOX s FLUE do MOUNTING NTROL Beye SCREWS BOARD CONTROL BOARD MANUAL SAFEGUARD RESET LIMIT RELIEF SWITCH SWITCH BOX FILTER RETAINER MANUAL WASEIABLE RESET LIMIT SWITCHES A92063 A92064 Fig 6 Model GB1AAV Upflow Fig 7 Model GB3AAV Downflow Clean and lubricate as follows Remove screw from blower access door downflow horizontal furnace only and remove blower access door Remove vent pipe enclosure downflow horizontal furnace only and disconnect short piece of vent pipe from relief box Disconnect wires from auxiliary limit on blower housing downflow horizontal furnace only Disconnect electrical leads from control See Fig 6 or 7 Note location of wires for reassembly 2 3 4 Remove control 5 6 Remove screws holding blower assembly to blower deck and slide blower assembly out of furnace 7
26. ose blower access door switch A WARNING Blower access door switch opens 115 v power to control center No component operation can occur Caution must be taken when manually closing this switch for service purposes Failure to follow this warning could result in personal injury or death d BRIEFLY short jumper TEST 1 4 in quick connect terminal on control center adjacent to LED diagnostic light and Com terminal on thermostat connection block See Fig 11 NOTE If TEST to Com terminals are jumpered longer than 2 sec LED will flash rapidly and retrieval request will be ignored e Component Test will function as described in item 2 above f Check LED status g If LED status indicates proper operation release blower access door switch replace blower access door and replace control access door E Troubleshooting Refer to the service label See Fig 13 Pages 10 and 11 contain a troubleshooting guide This guide can be a useful tool in isolating furnace operation problems Beginning with the word Start answer each question and follow the appropriate arrow to the next item The guide will help to identify the problem or failed component After replacing any component verify correct operation sequence a 24v W DPQ PO
27. ponent Test 3 Operate furnace through 1 heat cycle to test for proper operation and check LED status 4 If furnace is operating properly and LED indicates proper operation replace control access door FIELD 24 VOLT WIRING FIELD 115 208 230 460 VOLT WIRING FACTORY 24 VOLT WIRING FACTORY 115 VOLT WIRING NOTE 2 THERMOSTAT FIVE 4 9 TERMINALS FIELD SUPPLIED WIRE i FUSED DISCONNECT THREE WIRE ae HEATING E 208 230 ONLY T 460 VOLT e THREE W 1 0 0 ___ PHASE i OY piep eee i ips SINGLE 115 VOLT FIELD AUXILIARY J PHASE SUPPLIED J BOX s GND FUSED CONTROL L NOTE1 j CONDENSING DISCONNECT SENE UNIT 24 VOLT TWO TERMINAL WIRE BLOCK FURNACE NOTES 1 Connect Y terminal as shown for proper operation 2 Some thermostats require a C terminal connection as shown 3 If any of the original wire as supplied must be replaced use same type or equivalent wire A95241 Fig 10 Heating and Cooling Application Wiring Diagram 5 Component Test can also be initiated by performing the following a Remove control access door b Remove blower access door c Manually cl
28. r and blower by reversing items 5 through 10 If motor has ground wire be sure it is connected as before N CAUTION Be sure the motor is properly positioned in the blower housing The motor oil ports must be at a minimum of 45 above the horizontal centerline of the motor after the blower assembly has been reinstalled in the furnace 16 Reinstall blower assembly in furnace 17 Reinstall control Connect blower electrical leads to control Please note that the common wire connection is 3 16 in and all other wire connections are 1 4 in for assembly DO NOT FORCE 18 Reconnect wires to auxiliary limit switch on blower housing downflow horizontal furnace only 19 Reinstall vent pipe and enclosure downflow horizontal furnace only 20 Turn on electrical power and check for proper rotation and speed changes between heating and cooling 21 Replace blower access door Secure with screw downflow horizontal furnace only C Cleaning Heat Exchanger The following steps should be performed by a qualified service technician NOTE Deposits of soot and carbon indicate the existence of a problem which needs to be corrected Take action to correct the problem If it becomes necessary to clean the heat exchanger because of carbon deposits soot etc proceed as follows Turn off gas and electrical power to furnace Remove screw from front of blower access door downflow horizontal furnace only and remove control and blower access doors 1
29. set IGNITION PROVING FAILURE Control will try three more times before a lockout 14 occurs If flame signal lost after trial for ignition period blower will come on for 90 second recycle delay Check for Oxide buildup on flame sensor clean with fine sandpaper Proper flame sense microamps 5 microamps D C minimum Gas valve turned off Manual shut off valve Low inlet gas pressure Green wire MUST be connected to furnace sheet metal Inadequate flame carryover or rough ignition COMPONENT TEST To initiate the component test sequence shut OFF the room thermostat or disconnect the R thermostat lead Briefly short the EST terminal to the C terminal Status LED will flash code and then turn on the inducer motor hot surface igniter blower motor heat speed and blower motor cool speed for 10 15 seconds each Y R G 320615 102 REV C Fig 13 Service Label A93297 M9JOS 5 JO M eubls 0 jou seop onuoo 101 U09 eu uo 9 10 M ye Juaseid pz SI Bunoeuuoo191uI JO ye soway Y99849 01 Jexyeelq 41M 10 Y90949 es 0 pue 95019 pesojo nouo S uelis 0 pue
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