Service Facts Upflow/ Horizontal, Downflow/ Horizontal, Gas
Contents
1. auxilary limit switch above specifications NO Replace auxiliary limit switch YES Check for excessive reverse flow during an off cycle UH1 DH1 SF 1H DEFINITION Limit switches are safety devices that will open when an abnormal high temperature has been sensed REMOVE ALL JUMPER WIRING TO SWITCHES Under no circumstances shall these switches be left jumpered when not troubleshooting 4 Flash Fault LED Is a Manual Reset Flame Rollout Switch open stall correct size orifices Check operatio UH1 DH1 SF 1H YES S the burner orifice size 56 Or matched to Installers Guide for Is LP gas being used NO YES Service Facts Is this a downflow DH1 model YES stall correct siz N orifices Check operatio Are the burner YES YES Y Disconnect electrical power to furnace Y Is flue piping restricted Correct as needed Check operation lt YES NO y Check flue pipe for correct sizing and long horizontal runs or slope less than 1 2 per linear foot Correct as needed Remove clean and reassemble burners Push RED reset on both rollout switches Cycle power to furnace and call for heat Check burner alignment Correct as needed Check operation Do all burners ignite within 52. GR CHECK POWER EXTERNAL LOCKOUT RETRIES OR RECYCLES EXCEEDED 3 FLASHES PRESSURE SWITCH ERROR 4 FLASHES OPEN LIMIT DEVICE 7 FLASHES 8 FLASHES 9 FLASHES WH 6 BK 5 GND WH 5 HS WH FLAME SENSOR fon I po use ve pore Lyi e FRS INOT USE TCO B nort ust p zii YL I 2 TCO THERMAL ACK R CUT OUT BLAC 3 WHITE BR YELLOW RD ORANGE BL WIRE COLOR T FRS FLAME ROLLOUT oto SWITCH Co HY FP FLAME SENSOR LINE Veto Br 24 V WIRING Mi PS PRESSURE LINE i FIELD OR 24 WIRING SWITCH INTERNAL THERMAL Ud PROTECTION NUMBER 10 IF ANY 1 1 1 1 1 I ee FLASHING SLOW NORMAL I I I I LINE TH NEUTRAL TR GROUND MV COMMON TNS HIGH LIMIT OUTPUT HIGH LIMIT INPUT 24 VAC HOT 24 VAC COMMON MAIN GAS VALVE TRANSFORMER CHASSIS GROUND CF CAPACITOR TES HSI HOT SURFACE gt IGNITER DOOR SWITCH 0 I YL 2 LM NOTES ANY OF THE ORIGINAL WIRING AS SUPPLIED WITH THIS FURNACE MUST BE REPLACED IT MUST BE WITH WIRE HAVING A TEMPERATURE RATING OF TWINY WoRG 4 Y W R G THERMOSTAT SEE NOTE 2 amp 3 UH1 DH1 SF 1H e C GAS M P VALVE L DH 1 REVOI AT LEAST 105 C CONNECTED TO THE THESE LEADS PROV CLEANER EAC AN THER
3. e flames fro burners impinging on sides of heat exchanger YES Are all burner flame directed into heat exchange with a tight pattern inadequately aired burner tend to roll back Check combustion air blower venting heat exchanger for blockage d i e sooting NO Replace heat exchanger Check operatio flames stay Replace Roll ou switch Check operatio 21 Service Facts m 22 DEFINITION Flame is sensed when it should not be sensed Install drip leg per National Fuel Gas Code and Installation Instructions lt N 5 Flash Fault LED Disconnect electrical power to furnace Turn off gas supply Remove gas valve Are there signs of moisture or debris in he inlet gas screen YES Y Inspect gas supply for leaks and have gas supplier check gas quality Is there a drip leg installed on inlet gas piping per installation instructions YES sing a back up wrench install new gas valve Check operation UH1 DH1 SF 1H DEFINITION Ground Fault Incoming or chassis ground connection is not sensed Polarity Fault Incoming high voltage wiring is reversed Line Voltage Too Low Line voltage must not be below 97 VAC 6 Flash Fault LED Reverse 120 vac power leads to furn
4. FURNACE EXTERNAL STATE PRESSURE om ozo os om oco T oo HIGH Black 740 647 518 457 MED HIGH Blue 650 559 420 390 MED LOW Yellow 560 438 305 279 LOW Red 478 376 220 178 HIGH Black 919 812 MED HIGH 852 744 MED LOW Yellow 768 666 LOW Red 670 570 HIGH Black MED HIGH MED LOW Yellow LOW Red HIGH Black MED HIGH Blue MED LOW Yellow LOW Red HIGH Black MED HIGH MED LOW Yellow LOW Red HIGH Black MED HIGH Blue MED LOW Yellow LOW Red HIGH Black MED HIGH MED LOW Yellow LOW Red First letter may be A or T Factory Set Heat Speed Tap Setting UH1B040A9241A UH1B060A9361A UH1B080A9421B UH1C080A9601A UH1C100A9481A UH1D100A9601A UH1D120A9601A OOO 7 sn eo on vam am 0 50 roo jzoo J ao seeo zooo so zo sn on PumBoaas2eA 59 so as 59 j cese eee ee 4 59 54 5 4 unica amp E 70000 P www ele e oo o n loo First letter may be A or T UH1 DH1 SF 1H 11 Service Facts FURNACE AIRFLOW CFM VS EXTERNAL S
5. 1 2 1 2 1 2 1 2 DIMENSIONS HxWxD HxWxD HxWxD HxWxD Crated In 41 3 4 x 19 1 2 x 30 1 2 41 3 4 x 19 1 2 x 30 1 2 41 3 4 x 23 x 30 1 2 41 3 4 x 26 1 2 x 30 1 2 WEIGHT Shipping Lbs Net Lbs Notes Central Furnace heating designs are certified to ANSI Z21 47 CSA 2 3 For U S applications above input ratings BTUH are up to 2 000 feet derate 4 per 1 000 feet for elevations above 2 000 feet above sea level 145 135 158 148 171 160 205 193 For Canadian applications above input ratings BTUH are up to 4 500 feet derate 4 per 1 000 feet for elevations above 4 500 feet above sea level Based on U S government standard tests The above wiring specifications are in accordance with National Electrical Code however installations must comply with local codes 9 Refer to the Vent Length Table in the Installer s Guide or the Allowable Vent Length label located on the furnace All UH1 and DH1 furnace models have a vent outlet diameter that equals 2 UH1 DH1 SF 1H Service Facts A WARNING A WARNING CARBON MONOXIDE POISONING HAZARD FIRE OR EXPLOSION HAZARD Failure to follow the steps outlined below for each Failure to follow the safety warnings exactly could result appliance connected to the venting system being in serious injury death or property damage placed into operation could result in carbon monoxide Never test for gas leaks with an open flame Use a com poisoning or death mercially available
6. 150 140 158 148 The above wiring specifications are in accordance with National Electrical Code however installations must comply with local codes Refer to the Vent Length Table in the Installer s Guide or the Allowable Vent Length label located on the furnace All UH1 and DH1 furnace models have a vent outlet diameter that equals 2 rasa nn P NOTICE Since the manufacturer has a policy of continuous product and product data improvement it reserves the right to change design and specifications without notice 2012 Trane All Rights Reserved Service Facts m PRODUCT SPECIFICATIONS MODEL UH1C080A9601A UH1C100A9481A UH1D100A9601A UH1D120A9601A TYPE Upflow Horizontal Upflow Horizontal Upflow Horizontal Upflow Horizontal RATINGS 9 Input BTUH 80 000 97 000 97 000 110 000 Capacity BTUH ICS 76 000 92 150 92 150 104 500 Temp rise Min Max F 30 60 35 65 35 65 40 70 BLOWER DRIVE DIRECT DIRECT DIRECT DIRECT Diameter Width In 11x10 10 x 10 11x10 11x10 No Used 1 1 1 1 Speeds 4 4 4 4 CFM vs in w g See Fan Performance Table See Fan Performance Table See Fan Performance Table See Fan Performance Table Motor HP 3 4 1 2 3 4 3 4 R P M 1100 1075 1100 1100 Volts Ph Hz 115 1 60 115 1 60 115 1 60 115 1 60 COMBUSTION FAN Type Centrifugal Centrifugal Centrifugal Centrifugal Drive No Speeds Direct 1 Direct 1 Direct 1 Direct 1 Motor HP
7. RPM 1 20 3450 1 20 3450 1 20 3450 1 20 3450 Volts Ph Hz 115 1 60 115 1 60 115 1 60 115 1 60 FLA 0 71 0 71 0 71 0 71 FILTER Furnished No No No No Type Recommended High Velocity High Velocity High Velocity High Velocity Hi Vel No Size Thk 1 20x25 lin 1 20x25 tin 1 24x25 lin 1 24x25 lin VENT PIPE DIAMETER 3 Round 3 Round 3 Round 3 Round Min In HEAT EXCHANGER Type Fired Aluminized Steel Type I Aluminized Steel Type I Aluminized Steel Type I Aluminized Steel Type I Unfired Gauge Fired 20 20 20 20 ORIFICES Main Nat Gas Qty Drill Size 4 45 5 45 5 45 6 45 L P Gas Qty Drill Size 4 56 5 56 5 56 6 56 GAS VALVE Redundant Single Stage Redundant Single Stage Redundant Single Stage Redundant Single Stage PILOT SAFETY DEVICE Type Hot Surface Ignition Hot Surface Ignition Hot Surface Ignition Hot Surface Ignition BURNERS Type Multiport Inshot Multiport Inshot Multiport Inshot Multiport Inshot Number 4 5 5 6 POWER CONN V Ph Hz 115 1 60 115 1 60 115 1 60 115 1 60 Ampacity In Amps 13 5 12 5 12 9 12 9 Max Overcurrent Protection 20 20 20 20 Amps PIPE CONN SIZE IN 1 2 1 2 1 2 1 2 DIMENSIONS HxWxD HxWxD HxWxD HxWxD Crated In 41 3 4 x 23 x 30 1 2 41 3 4 x 23 x 30 1 2 41 3 4 x 26 1 2 x 30 1 2 41 3 4 x 26 1 2 x 30 1 2 WEIGHT Shipping Lbs Net Lbs Notes Central Furnace
8. UH1 DH1 SF 1H Upflow Horizontal Downflow Horizontal Gas Fired Direct Vent Condensing Single Stage Furnaces UH1B040A9241A UH1C100A9481A DH1B065A9421A UH1B060A9361A UH1D100A9601A DH1C085A9481A UH1B080A9421B UH1D120A9601A DH1D110A9601A UH1C080A9601A DH1B040A9241A First letter may be A or T IMPORTANT This document contains a wiring diagram and service information This is customer property and is to remain with this unit Please return to service information pack upon completion of work DISCONNECT POWER BEFORE SERVICING PRODUCT SPECIFICATIONS MODEL UH1B040A9241A UH1B060A9361A UH1B080A9421B TYPE Upflow Horizontal Upflow Horizontal Upflow Horizontal RATINGS Input BTUH 40 000 60 000 77 000 Capacity BTUH ICS 38 000 57 000 73 150 Temp rise Min Max F 30 60 30 60 35 65 BLOWER DRIVE DIRECT DIRECT DIRECT Diameter Width In 9x7 10x7 11x8 No Used 1 1 1 Speeds No 4 4 4 CFM vs in w g See Fan Performance Table See Fan Performance Table See Fan Performance Table Motor HP 1 5 1 3 1 2 R P M 1075 1075 1075 Volts Ph Hz 115 1 60 115 1 60 115 1 60 COMBUSTION FAN Type Centrifugal Centrifugal Centrifugal Drive No Speeds Direct 1 Direct 1 Direct 1 Motor HP RPM 1 55 3000 1 15 3450 1 20 3450 Volts Ph Hz 115 1 60 115 1 60 115 1 60 FLA 1 0 1 75 0 71 FILTER Furnished No No No Type Recommended High
9. 26 9 Flash Troubleshooting Igniter Faults 27 Furnace PSC Fan Motor No Air Flow The following pages include troubleshooting flowcharts in reference to the 95 Single Stage furnaces ONL Y using the FAULT LED as starting points The information contained is for reference only and does not cover all scenarios or problems that may be encountered by a qualified field technician Only qualified technicians should attempt to install troubleshoot or repair this appliance Failure to follow all cautions and or warnings could result in personal or property damage including death UH1 DH1 SF 1H Service Facts m Integrated Furnace Control IFC Component Layout Single Stage 95 Condensing Furnace Integrated Furnace Control IFC Component Layout Line Voltage Connections PARK PARK t E28 t J LINE IN Cc E7 MN Eg C N Cc E9 XFMR N Dip Switches to 24 volt Furnace configure Heat Cool Component Delay Options Connections m GU BE i Control Fuse TWIN Y w R G C E34 50A65 475 7 Fault LED Red CNT03076 A twin Y W R G Low Voltage Terminal Strip UH1 DH1 SF 1H Service Facts Fault LED Flash Codes Definitions INTEGRATED FURNACE CONTROL ERROR FLASH CODES Flashing Slow Flashing Fast Continuous ON Continuous OFF 2 Flashes 3 Flashes 4 Flashes
10. Filters should be cleaned or replaced with high velocity filters only monthly and more frequently during high use times of the year such as midsummer or midwinter 3 BLOWERS The blower size and speed determine the air volume delivered by the furnace The blower mo tor bearings are factory lubricated and under normal operating conditions do not require servicing If motor lubrication is required it should only be done by a qualified servicer Annual cleaning of the blower wheel and housing is recommended for maximum air output and this must be performed only by a qualified servicer or service agency A WARNING Do NOT touch igniter It is extremely hot Failure to follow this warning could result in severe burns 4 IGNITER This unit has a special hot surface direct igni tion device that automatically lights the burners Please note that it is very fragile and should be handled with care A WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow the service and or periodic maintenance instructions for the furnace and venting system could result in carbon monoxide poisoning or death 5 BURNERS Gas burners do not normally require scheduled servicing however accumulation of foreign material may cause a yellowing flame or delayed igni tion Either condition indicates that a service call is required For best operation burners should be cleaned annually by a qualified servicer Turn off gas and electric power supp
11. 5 Flashes 6 Flashes 7 Flashes 8 Flashes 9 Flashes UH1 DH1 SF 1H Normal No call for Heat Normal Call for Heat Replace IFC Check Power System Lockout Retries or Recycles exceeded Pressure Switch Error Open High Limit Device Flame sensed when no flame should be present 115 Volt AC power reversed or Poor Grounding Gas valve circuit error Low flame sense signal Check Ignitor 15 16 Service Facts m GETTING STARTED Is high voltage power supplied o the unit YES Y Close and hold door switch Is the IFC LED flashing YES Y What is the fault light flash code See FAULT LED Flash Codes page N Repair high voltage connection to unit NO Y Is 24VAC low voltage present from transformer and fuse good Repair low voltage wiring replace transformer or fuse as needed information Refer to Gas Furnace Silicon Nitride Ignitor Models Service Manual to supplement this Publication Number 34 3405 08 YES Are connections and wiring in working condition n Repair connections YES Replace UH1 DH1 SF 1H DEFINITION RETRY Lock Out 3 unsuccessful tries for ignition within a single call for heat Flame has never been sensed RECYCLE Lock Out 7 10 recycles within a single call for heat Flame is sensed amp t
12. Check all wiring for insulation damage and connection integrity there wiriri or insulation damage NO YES Repair or replace wiring Check operation 26 7 Good UH1 DH1 SF 1H Service Facts TROUBLESHOOTING Furnace PSC fan motor No Air Flow Turn the FAN switch to at the thermostat Is there any air flow Check for dirty air filter duct work damage or restrictions around the air handler coil and repair as needed Is the fan wheel running the high voltage power supplied to the unit Repair high voltage connection to unit between R transformer 5 the proper lin hot and B C transformer voltage present at Is fuse blown Replace fuse ommon at the low voltage he transformer field connections Repair wiring Replace between incoming transformer power supply and transformer 1 224 VAC measured between G and B C at the low voltage Check thermostat connections NO gt and wiring to thermostat YES line voltage measured betwee motor common and applied speed tap at IFC CIR N and HEAT H NO Replace the IFC YES Y Replace run NO capacitor microfarad reading of fai motor run capacitor within 1096 of rated val
13. Velocity High Velocity High Velocity Hi Vel No Size Thk 1 17 25 lin 1 17x25 lin 1 17x25 lin VENT PIPE DIAMETER Min In 2 Round 2 Round 2 Round HEAT EXCHANGER Type Aluminized Steel Type 1 Aluminized Steel Type Aluminized Steel Type Unfired Gauge Fired 20 20 20 ORIFICES Main Nat Gas Qty Drill Size 2 45 3 45 4 45 L P Gas Qty Drill Size 2 56 3 56 4 56 GAS VALVE Redundant Single Stage Redundant Single Stage Redundant Single Stage PILOT SAFETY DEVICE Type Hot Surface Ignition Hot Surface Ignition Hot Surface Ignition BURNERS Type Multiport Inshot Multiport Inshot Multiport Inshot Number 2 3 4 POWER CONN V Ph Hz 115 1 60 115 1 60 115 1 60 Ampacity In Amps 5 2 9 2 10 2 Max Overcurrent Protection Amps 15 15 15 PIPE CONN SIZE IN 1 2 1 2 1 2 DIMENSIONS HxWxD HxWxD HxWxD Crated In 41 3 4 x 19 1 2 x 30 1 2 41 3 4 x 19 1 2 x 30 1 2 41 3 4 x 19 1 2 x 30 1 2 WEIGHT Shipping Lbs Net Lbs Notes 139 129 Central Furnace heating designs are certified to ANSI Z21 47 CSA 2 3 For U S applications above input ratings BTUH are up to 2 000 feet derate 4 per 1 000 feet for elevations above 2 000 feet above sea level For Canadian applications above input ratings BTUH are up to 4 500 feet derate 4 6 per 1 000 feet for elevations above 4 500 feet above sea level 9 Based on U S government standard tests
14. rV FLAME SENSOR R HSI YLIS IMANUAL RESET FLAME ROLLOUT SWITCH MAIN 7777 1 REDUNDANT PRESSURE SWITCH a 5 LIMIT SWITCH YL GR TCO B GND GND wie WH BK BK 6 BK BURNER COMPARTMENT IMPORTANT INTEGRATED CONTROL IS POLARITY SENSITIVE HOT LEG OF 120V POWER SUPPLY MUST BE CONNECTED TO THE BLACK POWER LEAD AS INDICATED ON WIRING DIAGRAM RA WIRE BUNDLE OFF ON 2 L 0 5 1 COOL OFF HEAT OFF DELAY DELAY Sw2 sw3 DELAY SWI DELAY ON 60 SEC ON lo sEc ON ON 100 SEC OFF ON 140 SEC OFF 80 SEC 180 SEC FACTORY SETTING BLOWER COMPARTMENT Lari DOOR SWITCH ABLE A BK 3 INTEGRATED FURNACE CONTROL IFC DIAGNOSTIC LIGHT 5 N A 9 MV 6 TR Ps LOW VOLTAGE 7 HLI JII N A 8 GND 12 l L SEE NOTE 5 THERMOSTAT Y W R SEE NOTES 2 AND 3 From Dwg D343498P01 Rev 2 continued on next page UH1 DH1 SF 1H Service Facts SCHEMATIC DIAGRAM 115 60 HZ PH TABLE A N WARNING POWER SUPPLY PER LOCAL CODE SPEED TAPS FOR 1 0 FAN MOTOR HAZARDOUS VOLTAGE N MODEL HEAT PARK PA DISCONNECT ALL ELECTRICAL POWER B NCLUDING REMOTE DISCONNECTS BEFORE gt 13 0 40 9241 YL B SERVICING WH 1 G
15. run during the heating cycle Downflow models have a 10 tested as outlined above return doors windows second blower ON delay exhaust fans fireplace dampers and any other gas fired When the thermostat is satisfied R and W thermostat burning appliance to their previous conditions of use contacts open the gas valve will close the flames will ex tinguish and the induced draft blower will be de energized The indoor blower motor will continue to run for the fan off period Field selectable at 60 100 140 or 180 seconds then be de energized by the control module 4 UH1 DH1 SF 1H Service Facts AIRFLOW ADJUSTMENT Check inlet and outlet air temperatures to make sure they The following warning complies with State of California law Proposition 65 are within the ranges specified on the furnace rating name plate If the airflow needs to be increased or decreased see WARNING the wiring diagram for information on changing the speed This product contains fiberglass wool insulation of the blower motor Fiberglass dust and ceramic fibers are believed by the State of California to cause cancer through inhalation WARNING Glasswool fibers may also cause respiratory skin or Disconnect power to the unit before removing the blower eye irritation door Failure to follow this warning could result in personal PRECAUTIONARY MEASURES injury from moving parts Avoid breathing fiberglass dust Use a NIOSH approved dust mist respirat
16. soap solution made specifically for the detection of leaks to check all connections A fire or The following steps shall be followed for each appliance explosion may result causing property damage personal connected to the venting system being placed into injury or loss of life operation while all other appliances connected to the venting system are not in operation A WARNING 1 Seal any unused openings in the venting system FIRE OR EXPLOSION HAZARD 2 Inspect the venting system for proper size and Failure to follow the safety warnings exactly could result horizontal pitch as required in the National Fuel Gas in serious injury death or property damage Code ANSI Z223 1 NFPA 54 or the CAN CGA B149 Improper servicing could result in dangerous operation Installation Codes and these instructions Determine serious injury death or property damage that there is no blockage or restriction leakage gt corrosion and other deficiencies which could cause A CAUTION unsafe condition The integrated furnace control is polarity sensitive The windows and all doors between the space in which the het leg or the 115 VAC power must be connected to the BLACK field lead appliance s connected to the venting system are located and other deficiencies which could cause an SEQUENCE OF OPERATION unsafe condition As far as practical close all building doors and Thermostat call for heat R and W thermostat contacts close s
17. switch is NO measured across PS Cien orange to yellow fi See Note 1 operation across PS NO YES T Pressure switch is okay Re attach wire to PS Check PS hose flue piping for th EN danene YES Replace pressure switch switch label confirm vent size is correct Note 1 24 volts Open Switch 0 volts Closed Switch Note 2 Measured pressure is negative greater than refers to magnitude only UH1 DH1 SF 1H Check operation D Is 120 volts measured between the IFC IND H to IND N Disconnect electrical power from the furnace and check TCO B NO Replace N Check operation Is TCO B Replace Inducer open NO 5 Check operation YES Allow time for Inducer Limit to cool and investigate cause for high vent temperatures cool and ontacts open Replace Inducer TER Limit switch 19 Service Facts me DEFINITION Limit switches are safety devices that will open when an abnormal high 4 Flash Fault LED See next page for additional 4 flash temperature has been sensed REMOVE ALL JUMPER WIRING TO SWITCHES Under no circumstances Disconnect electrical power to furnace shall these switches be left jumpered when not troubleshooting Replace filter and clean blower wheel Ch
18. ES CHECK IGNITER GR 4 FLASHES OPEN LIMIT DEVICE GND TCO THERMAL BLACK GR NE WHITE BR HSI g CUT OUT 24 v JWIRING YELLOW RD PS PRESSURE OR ORANGE BL e SWITCH m 24 v J WIRING MIRE COLOR FRS FLAME ROLLOUT akin ot 9 SWITCH INTERNAL THERMAL L PROTECTION NUMBER ID IF ANY GN CY FP FLAME SENSOR INOT USE opie LINE TH 24 VAC HOT CHASSIS GROUND CF CAPACITOR NEUTRAL TR 24 VAC COMMON HSI HOT SURFACE GROUND MV MAIN GAS VALVE IGNITER COMMON TNS TRANSFORMER COIL HIGH LIMIT OUTPUT HIGH LIMIT INPUT INOT USE i NOT USE DOOR SWITCH NOTES mu IF ANY OF THE ORIGINAL WIRING AS SUPPLIED WITH THIS FURNACE MUST c BE REPLACED IT MUST BE WITH WIRE HAVING A TEMPERATURE RATING OF 5 AT LEAST 105 C MP VALVE s THERMOSTAT HEAT ANTICIPATOR SETTING 38 AMPS FOR PROPER OPERATION OF COOLING SPEED Y TERMINAL MUST BE CONNECTED TO THE ROOM THERMOSTAT THESE LEADS PROVIDE 120V POWER CONNECTIONS FOR ELECTRONIC AIR CLEANER EAC AND HUMIDIFIER HUM MAX LOAD 1 0 AMPS EACH UH WHEN TWINNING TWO FURNACES BOTH UNITS MUST BE CONNECTED TO THE SAME 115 VAC PHASE CONNECT THE TWO UNITS TWIN TERMINALS WITH 14 TO 22 AWG WIRE THERMOSTAT SEE NOTES 2 AND 3 VOL From Dwg D343498 Rev 2 UH1 DH1 SF 1H 7 Service Facts BLOWER COMPARTMENT SAFETY INTERLOCK WIRING DIAGRAM COOL O
19. FF DELAY DELAY ON O SEC OFF 80 SEC HEAT OFF DELAY DELAY 60 SEC 100 SEC 140 SEC OFF 180 SEC FACTORY SETTING SWI e o e JUMPER WIRE INTEGRATED FURNACE CONTROL IFC DIAGNOSTIC LIGHT VOLTAGE TERMINAL 9 MV 10 PS 11 N A 12 MV 6 TR 1 HLI 8 GND NOTE 5 C0 B REVERSE FLOW SWITCH is UM YL 5 SEE NOTES 2 AND 3 E EE B E E ON E Gs ON E ONE NES ND ONES ED ONES s BLOWER COMPARTM I I og THERMOSTAT Y w R G C 2 WIRE BUNDLE Nm ENT JUNCTION BOX PH POWER SUPPLY PER LOCAL CODE 115 VOLT 60 HZ IMPORTANT INTEGRATED CONTROL 15 POLARITY SENSITIVE LEG OF 120V POWER SUPPLY MUST BE CONNECTED TO THE BLACK POWER LEAD AS INDICATED ON WIRING DIAGRAM BURNER COMPARTMENT LIMIT SWITCH TCO C BK BK X YL 2 LIMIT SWITCH TCO A a 1 BL C UM LLL VALVE MANUAL RESET FLAME ROLLOUT SWITCH GR ET FLAME SENSOR WH 5 k BK 5 U continued on next page OR re 05 PRESSURE SWITCH From Dwg D343814P01 Rev 0 UH1 DH1 SF 1H Service Facts SCHEMATIC DIAGRAM AN WARNING ATARDOUS VOLTAGE ISCONNECT ALL ELECTRICAL POWER NCLUDING REMOTE DISCONNECTS BEFORE RD B
20. L SERVICING RD vL FAILURE DISCONNECT POWER BEFORE TABLE SPEED TAPS FOR 1 0 FAN MOTOR MODEL HEAT PARK PARK 115 VOLT 60 HZ PH POWER SUPPLY PER LOCAL CODE BLOWER COMPARTMENT SAFETY INTERLOCK i 2 5 DOOR SWITCH DH1B040A9241A 1DH18065A9421A8 DHIC085A9481A DHIDIIOA9601A RD YL SERVICING CAN CAUSE SEVERE PERSONAL NJURY OR DEATH AN CAUTION LOW BL MED HIGH USE COPPER CONDUCTORS ONLY MED LOW BK HIGH NIT TERMINALS ARE NOT DESIGNED TO ACCEPT OTHER TYPES OF CONDUCTORS FAILURE TO DO SO MAY CAUSE DAMAGE MAY BE PREFIX A OR T FAIL MAY BE SUFFIX A THROUGH Z O THE EQUIPMENT INTEGR REPLAC EQ LENT INPUT VAC 60 HZ XFMR SEC CURRENT 450 MA MV OUTPUT 1 5 A 24 VAC IND 0 2 2 FLA 3 5 LRA 120 VAC CIRC ER OUTPUT 14 5 FLA 26 0 LRA 120 VAC HUMIDIFER amp AIR CLEANER MAX LOAD 1 0 A 120 VAC IGNITER OUTPUT 6 0 A 120 VAC RD YL RD YL FURNACE CONTROL PART CNT05995 OR DIAGNOSTIC CODES NO CALL FOR HEAT 5 FLASHES FLASHING FAST NORMAL CALL FOR HEAT CONTINUOUS ON REPLACE IFC CONTINUOUS OFF 2 FLASHES FLAME SENSED WHEN NO FLAME SHOULD BE PRESENT 115 VAC POWER REVERSED POLARITY OR POOR GROUNDING GAS VALVE CIRCUIT ERROR LOW FLAME SENSE SIGNAL CHECK IGNITER LIMIT SWITCH 6 FLASHES TCO C
21. M 1080 1075 1075 1100 Volts Ph Hz 115 1 60 115 1 60 115 1 60 115 1 60 COMBUSTION FAN Type Centrifugal Centrifugal Centrifugal Centrifugal Drive No Speeds Direct 1 Direct 1 Direct 1 Direct 1 Motor HP RPM 1 55 3000 1 25 3200 1 20 3450 1 20 3450 Volts Ph Hz 115 1 60 115 1 60 115 1 60 115 1 60 FLA 1 14 1 35 0 71 0 71 FILTER Furnished No No No No Type Recommended High Velocity High Velocity High Velocity High Velocity Hi Vel No Size Thk 2 14x20 tin 2 14x20 tin 2 16x20 tin 2 16x20 tin VENT PIPE DIAMETER 2 Round 2 Round 2 5 Round 2 5 Round Min In G9 HEAT EXCHANGER Type Fired Aluminized Steel Type I Aluminized Steel Type I Aluminized Steel Type I Aluminized Steel Type I Unfired Gauge Fired 20 20 20 20 ORIFICES Main Nat Gas Qty Drill Size 2 45 4 48 5 48 6 48 L P Gas Qty Drill Size 2 56 4 56 5 56 6 56 GAS VALVE Redundant Single Stage Redundant Single Stage Redundant Single Stage Redundant Single Stage PILOT SAFETY DEVICE Type Hot Surface Ignition Hot Surface Ignition Hot Surface Ignition Hot Surface Ignition BURNERS Type Multiport Inshot Multiport Inshot Multiport Inshot Multiport Inshot Number 2 4 5 6 POWER CONN V Ph Hz 115 1 60 115 1 60 115 1 60 115 1 60 Ampacity In Amps 4 8 11 4 12 5 12 9 Max Overcurrent Protection 15 15 20 20 Amps PIPE CONN SIZE IN
22. MOSTAT HEAT ANTICIPATOR SETTING FOR PROPER OPERAT 38 AM ION OF COOLING SPEED Y ROOM THERMOSTAT DE 120V POWER CONNECTIONS HUMIDIFIER HUM MAX LOAD 5 TERMINAL MUST FOR ELECTRONIC AIR 1 0 AMPS WHEN TWINNING TWO FURNACES BOTH UNITS MUST BE CONNECTED TO THE 4 TO 22 AWG WI SAME 115 VAC PHASE CONNECT THE TWO UNITS T RE WIN TERMINALS WITH From Dwg D343814P01 Rev 0 Service Facts PERIODIC SERVICING REQUIREMENTS A WARNING Disconnect power to the unit before removing the blower door Failure to follow this warning could result in personal injury from moving parts T GENERAL INSPECTION Examine the furnace __ installation annually for the following items a All flue product carrying areas external to the fur nace i e chimney vent connector are clear and free of obstruction A vent screen in the end of the vent flue pipe must be inspected for blockage annually b The vent connector is in place slopes upward and is physically sound without holes or excessive corro sion c The return air duct connection s is physically sound is sealed to the furnace and terminates out side the space containing the furnace d The physical support of the furnace should be sound without sagging cracks gaps etc around the base so as to provide a seal between the support and the base e There are no obvious signs of deterioration of the fur nace 2 FILTERS
23. R UHIBOGOA9361 FAILURE TO DISCONNECT POWER BEFORE GND BK 118080 94218 BL SERVICING CAN CAUSE SEVERE PERSONAL DOOR SWITCH sUHICOBOA960 1S8 YL NJURY OR DEATH 1 100 9481 BL AX CAUTION UHIDIO0A9601H88 YL USE COPPER CONDUCTORS ONLY sUHIDI20A960188 BL UNIT TERMINALS ARE NOT DESIGNED TO PREFIY MAT BE OR FT ACCEPT OTHER TYPES OF CONDUCTORS SUFFIX MAY BE A THROUGH Z FAILURE TO DO 50 MAY CAUSE DAMAGE O THE EQUIPMENT LOW BL MED HIGH MED LOW BK HIGH INTEGRATED FURNACE CONTROL REPLACE WITH PART CNT03076 OR EQUIVALENT INPUT 25 VAC 60 HZ XFMR SEC CURRENT 450 MA MV OUTPUT 1 5 A 24 VAC IND OUTPUT 2 2 FLA 3 5 LRA 120 VAC CIRC BLOWER OUTPUT 14 5 FLA 26 LRA 120 VAC HUMIDIFER amp AIR CLEANER MAX LOAD 1 0 A 120 VAC I I I 1 I IGNITER OUTPUT 2 0 A 0 120 VAC DIAGNOSTIC CODES 1 I 1 I I FLASHING SLOW NORMAL NO CALL FOR HEAT 5 FLASHES FLAME SENSED WHEN NO FLAME FLASHING FAST NORMAL CALL FOR HEAT SHOULD BE PRESENT LIMIT SWITCH CONTINUOUS ON REPLACE IFC 6 FLASHES 115 VAC POWER REVERSED TCO B CONTINUOUS OFF CHECK POWER POLARITY OR POOR GROUNDING 2 FLASHES EXTERNAL LOCKOUT RETRIES 7 FLASHES GAS VALVE CIRCUIT ERROR Ar OR RECYCLES EXCEEDED 8 FLASHES LOW FLAME SENSE SIGNAL A FBK 3 FLASHES PRESSURE SWITCH ERROR 9 FLASH
24. TATIC PRESSURE in w wem f seeeorae 20 oso eo 4 HIGH Black 653 561 3 MED HIGH 550 462 2 MED LOW Yellow 460 378 LOW Red 375 308 HIGH Black MED HIGH Blue MED LOW Yellow LOW Red HIGH Black MED HIGH Blue MED LOW Yellow LOW Red HIGH Black MED HIGH Blue MED LOW Yellow LOW Red First letter may be A or T Factory Set Heat Speed Tap Setting DH1B040A9241A DH1B065A9421A DH1C085A9481A DH1D110A9601A CFM VS TEMPERATURE RISE Cubic Feet Per Minute ES MODEL eoo 700 900 1o 1200 1200 1400 1soo 1600 1700 1800 1900 2000 2100 2200 a 8 omwen mcwn m w w w w v w v v v Cwwnwew First letter 12 UH1 DH1 SF 1H Service Facts Troubleshooting Flowchart Index 14 IFC Component Layout 15 LED Flash Codes 16 Getting started 17 2 Flash Troubleshooting Retry and Recycle Lockout 19 3 Flash Troubleshooting Pressure Switch Fault 20 4 Flash Troubleshooting High Limit and Auxiliary Limit 21 4 Flash Troubleshooting Roll Out Limit 22 5 Flash Troubleshooting Flame Sensed Fault 23 6 Flash Troubleshooting Polarity Revered or Poor Ground Fault 24 7 Flash Troubleshooting External Gas Valve Circuit Fault 25 8 Flash Troubleshooting Low Flame Sense Fault
25. ace nese Connect volt meter Meter must be set up leads in series wthl for DC micro amp flame sensor scale I wv Cycle power to furnace and call for heat s flame sensor located correctly See figure Correct flame sensor location Is flame current measured less than 0 micro amp DC Replace flame sensor Check operation NO Flame sensor is good Check wiring and or connections Flame Sensor UH1 DH1 SF 1H Service Facts DEFINITION 9 Flash Fault LED Triac Fault The triac reduces voltage applied to the ignitor A voltage error has been sensed Ignitor Fault The control board has sensed that the ignitor circuit is open or shorted The Ignition system is very dependent on good earth ground connections A poor earth ground can result in multiple ignitor and or triac failures Disconnect electrical power to the furnace Disconnect resistance of ignitor Is resistance reading between 11 18 ohms Verify all ground connections Replace ignitor Check operation YES Verify all ground connections Replace the IFC 4 Check ignitor for lt YE Check operation wire insulation damage Check Triac Is it damaged NO
26. ace wiring lt 4 Disconnect incoming electrical power to furnace lt YE Reconnect power Check operation Correct earth ground Check operation UH1 DH1 SF 1H Disconnect incoming electrical power to furnace lt N Connect volt meter to white incoming neutral wire and green earth ground Does meter ead 120 vac NO Connect volt meter to black incoming and chassis ground at burner box Does meter ead 120 vac YES Y Disconnect incoming electrical power to furnace Check correct all ground connections within furnace for continuity Check operation Service Facts Correct neutral and ground problem Furnace must be on a dedicated circuit Is there a an 10 NO 23 Service Facts m 24 DEFINITION External Gas Valve Circuit Error 24 volts is present when it should not be present 7 Flash Fault LED Turn Comfort Control to OFF position Is 24 VAC nominal voltage present between Red lead at gas valve connection to chassis ground NO Replace IFC Correct wiring YES Check operation UH1 DH1 SF 1H Service Facts 8 Flash Fault LED DEFINITION The flame sense current is less than 1 micro amp DC Disconnect electrical power to the furn
27. eck operation Check set screw position and motor bearings Correct or replace as needed Check operation Are filter amp blower wheel clean wheel turn freely YES y Ignition occurs and FAN ON delay lt begins Cycle power to furnace and call for heat D es fan come on after 45 seconds Downflow models NO YES Return air temperature is above max limit Correct application or duct issues N Check operation Static pressure greater than temperature above 85 F Is 120 VAC measured at IFC between HEAT H and CIR N Replace furnace control Check operation Is 120 VAC measured to motor YES NO Check operation Check for loose insulation or other objects within furnace air stream Repair wiring harness temperature t high limit above ke switch setting manifold gas pressure withi Correct gas N pressure Check operation YES NO Replace high limit Switch 20 Make sure any temperature measuring devices thermocouples dial thermometers used to estimate limit temperature are within 74 inch of limit measurement point faults Check motor and capacitor Repair or replace as needed Down Flow Models Only continue to run during the entire
28. essure drop more than 2 Disconnect electrical power to furnace Connect manometer to oulet gas pressure connector I Cycle power to furnace and call for heat outlet ga manifold Service Facts Correct inlet gas pressure Check operation Replace Gas Valve Check operation 17 Service Facts me Correct positioning of ignitor and flame sensor NOTE the slight over lap of the ignitor and the bumer Igniter Slightly Overlapping OD of burner INCORRECT positioning of ignitor HOT ZONE must be centered over the cross over Ignitor not overlapping bumer see above Hot Zone not centered over crossover 18 UH1 DH1 SF 1H DEFINITION An error has occurred with the P S The error will be reported indicating that the pressure switch is either opened or Closed contrary to normal operating Sequence In most cases the pressure switch is not the problem Note Verify all wiring to pressure switch is correct per wiring diagram Service Facts 3 Flash Fault LED Cycle power to furnace and call for heat Is the inducer otor running NS YES Is 24 volts present Disconnect electrical power from the furnace and remove 1 wire from the pressure switch S continuit Nes Replace pressure Pressure
29. heating designs are certified to ANSI Z21 47 CSA 2 3 For U S applications above input ratings BTUH are up to 2 000 feet derate 496 per 1 000 feet for elevations above 2 000 feet above sea level 171 160 171 160 197 185 205 193 For Canadian applications above input ratings BTUH are up to 4 500 feet derate 4 per 1 000 feet for elevations above 4 500 feet above sea level Based U S government standard tests 9 The above wiring specifications are in accordance with National Electrical Code however installations must comply with local codes 9 Refer to the Vent Length Table in the Installer s Guide or the Allowable Vent Length label located on the furnace All UH1 and DH1 furnace models have a vent outlet diameter that equals 2 UH1 DH1 SF 1H PRODUCT SPECIFICATIONS Service Facts MODEL DH1B040A9241A DH1B065A9421A DH1C085A9481A DH1D110A9601A TYPE Downflow Horizontal Downflow Horizontal Downflow Horizontal Downflow Horizontal RATINGS Input BTUH 40 000 60 000 80 000 110 000 Capacity BTUH ICS 38 000 57 000 76 000 104 500 Temp rise Min Max F 30 60 25 55 30 60 35 65 BLOWER DRIVE DIRECT DIRECT DIRECT DIRECT Diameter Width In 10x7 11x8 11x10 11x10 No Used 1 1 1 1 Speeds No 4 4 4 4 CFM vs in w g See Fan Performance Table See Fan Performance Table See Fan Performance Table See Fan Performance Table Motor HP 1 5 1 2 1 2 3 4 R P
30. hen lost Clean and align burners correctly Check operation above 14 WC or less than nameplate minimum 2 Flash Fault LED Disconnect electrical power to furnace Connect manometer to inlet gas pressure con nector Is inlet gas pressure NO Cycle power to furnace and call for heat Does gas ignite ignite within 5 seconds NO pressure 4 5 WC 11 WC LP 11 0 WC LP YES Y Check igniter position and correct if needed Check operation Correct inlet gas Downflow model Check operation Downflow model DH1D110A960 only Adjust manifold gas pressure to 4 5 WC 11 WC LP Downflow model DH1B065A942 only Outlet gas pressure 3 0 WC 9 5 WC LP Check operation Adjust manifold gas pressure pressure pA NO to 3 5 WC NG 3 5 WC NG 110 WC LP Check operation YES Measure flame current Is flame current less than 1 YES micro amp 3 4 ua 7 Normal NO Flame sensor is good For CORRECT positioning of the igniter and flame sensor see figure on next page UH1 DH1 SF 1H s flame senso located correctly NO Correct and check operation Replace flame sensor Check operation Does inlet g pr
31. ignaling the control Turn on clothes dryers and any appliance not module to run its self check routine After the control connected to the venting system Turn on any exhaust module has verified that the pressure switch contacts are fans such as range hoods and bathroom exhausts so open and the limit switch es contacts are closed the draft they are operating at maximum speed Do not operate blower will be energized a summer exhaust fan Close fireplace dampers As the induced draft blower comes up to speed the pressure Follow the lighting instructions Place the appliance switch contacts will close and the ignitor warm up period being inspected into operation Adjust the thermostat will begin The ignitor will heat for approximately 20 sec so appliance is operating continuously onds then the gas valve is energized to permit gas flow to If improper venting is observed during any of the above the burners The flame sensor confirms that ignition has tests the venting system must be corrected in been achieved accordance with the National Fuel Gas Code After the flame sensor confirms within a 4 second trial ANSI Z221 1 NFPA 54 and or CAN CGA B149 period that ignition has been achieved the delay to fan Installation Codes ON period begins timing After approximately 45 seconds After it has been determined that each appliance the indoor blower motor will be energized and continue to connected to the venting system properly vents where
32. ly To clean burn ers remove burner box cover 6 to 8 screws and the top burner bracket Lift burners from orifices NOTE Be careful NOT to break igniter when removing burn ers Clean burners with brush and or vacuum cleaner Reassemble parts by reversal of the above procedure 10 A WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow the service and or periodic maintenance instructions for the furnace and venting system could result in carbon monoxide poisoning or death NOTE On LP propane units some light yellow tipping of the outer mantle is normal Inner mantle should be bright blue Natural gas units should not have any yellow tipped flames This condition indicates that a service call is required For best operation burners should be cleaned annually by a qualified servicer NOTE On LP propane units due to variations in BTU content and altitude servicing may be required at shorter inter vals 6 HEAT EXCHANGER FLUE PIPE These items must be inspected for signs of corrosion and or deterio ration at the beginning of each heating season by a qualified service technician and cleaned annu ally for best operation To clean flue gas passages follow recommendations below a Turn off gas and electric power supply b Inspect flue pipe exterior for cracks leaks holes or leaky joints Some discoloration of PVC pipe is nor mal c Remove burner compartment door from furnace d Ins
33. on The following warning complies with State of California law Proposition 65 Downflow models have a 10 second blower ON delay The FAN OFF period is field selectable by dip switches at 60 WARNING 100 140 or 180 seconds The factory setting is 100 seconds Hazardous Gases See wiring diagram Exposure to fuel substances by products of incomplete Cooling The fan delay off period is factory set at 0 sec fuel combustion is believed by the state of California to onds The option for 80 second delay off is field selectable cause cancer birth defects or other reproductive harm See wiring diagram NOTE Direct drive motors have bearings which are perma nently lubricated and under normal use lubrication is not recommended CORRECT METHOD OF CHECKING DIRECT VENT MANIFOLD PRESSURE WITH BURNER BOX REFERENCED Separate the tube at the unit Tee and reconnect with a short piece of field supplied tube and another Tee with the U Manometer attached Be sure to reconnect unit tubing to original position after testing the manifold pressure Field supplied barb fitting wit manometer tube is attached to the OUTLET PRESSURE on the outlet side of the gas valve UH1 DH1 SF 1H 5 Service Facts JUNCTION BOX POWER SUPPLY PER LOCAL CODE 415 VOLT 60 HZ LIMIT SWITCH TCO A L a Y WIRING DIAGRAM WH
34. or This unit is equipped with a blower door switch which cuts power to the blower and gas valve causing shutdown when the door is removed Operation with the door removed or Avoid contact with the skin or eyes Wear long sleeved ajar can permit the escape of dangerous fumes All panels loose fitting clothing gloves and eye protection must be securely closed at all times for safe operation of the Wash clothes separately from other clothing rinse furnace washer thoroughly Operations such as sawing blowing tear out and spraying may generate fiber concentrations requiring additional respiratory protection Use the appropriate NIOSH approved respirator in these situations A WARNING BODILY INJURY CAN RESULT FROM HIGH VOLTAGE ELECTRICAL COMPONENTS FAST MOVING FANS AND COMBUSTIBLE GAS FOR PROTECTION FROM THESE INHERENT HAZARDS DURING INSTALLATION FIRST AID MEASURES Eye Contact Flush eyes with water to remove dust If symptoms persist seek medical attention AND SERVICING THE ELECTRICAL SUPPLY MUST BE DISCONNECTED AND THE MAIN GAS VALVE MUST BE TURNED OFF IF OPERATING CHECKS MUST BE PERFORMED WITH THE UNIT OPERATING IT IS THE TECHNICIANS RESPONSIBILITY TO RECOGNIZE THESE HAZARDS AND PROCEED SAFELY INDOOR BLOWER TIMING Heating The control module controls the indoor blower Skin Contact Wash affected areas gently with soap and warm water after handling The blower start is fixed at 45 seconds after igniti
35. pect around insulation covering flue collector box Inspect induced draft blower connections from recuperative cell and to the flue pipe connection e Remove burners See 5 f Use a mirror and flashlight to inspect interior of heat exchanger be careful not to damage the igniter flame sensor or other components g If any corrosion is present contact a service agency Heat exchanger should be cleaned by a qualified service technician h After inspection is complete replace burners and all furnace doors i Restore gas supply Check for leaks using a soap solution Restore electrical supply Check unit for normal operation 7 FURNACE CONDENSATE DRAIN TUBES Conden sate drain tubes must be checked periodically to assure that condensate can flow freely from unit to drain If a drain problem cannot be corrected call a qualified servicer 8 COOLING COIL CONDENSATE DRAIN If a cooling coil is installed with the furnace condensate drains should be checked and cleaned periodically to assure that condensate can drain freely from coil to drain If condensate cannot drain freely water damage could oc cur See Condensate Drain in Installer s Guide CAUTION Label all wires prior to disconnection when servicing controls Wiring errors can cause improper and dangerous operation Verify proper operation after servicing UH1 DH1 SF 1H Service Facts FURNACE AIRFLOW CFM VS EXTERNAL STATIC PRESSURE in w c
36. ue Replace fan motor and run capacitor YES UH1 DH1 SF 1H 27 Service Facts mee Literature Order Number UH1 DH1 SF 1H File Number UH1 DH1 SF 1H Trane Supersedes UH1 DH1 SF 1G 6200 Troup Highway Date 08 12 Tyler TX 75707 Since the manufacturer has a policy of continuous product and product data improvement it reserves the right change design specifications without notice your local dealer distributor
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