*UD2-SF-1E Service Facts - Chapman Air and Heatchapmanair.com/images/pdf/furnaces/ud2-sf-1e.pdf · ud2-sf-1d 3 service facts safety section ! warning the cabinet must have an uninterrupted

Service Facts

© 2010 Trane All Rights Reserved

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.

Product Specifications 1MODELTYPERATINGS 21st Stage Input BTUH

1st Stage Capacity BTUH (ICS) 32nd Stage Input BTUH

2nd Stage Capacity BTUH (ICS) 3Temp. rise (Min.-Max.) °F.BLOWER DRIVEDiameter - Width (In.)No. UsedSpeeds (No.)CFM vs. in. w.g.Motor HPR.P.M.Volts / Ph / HzCOMBUSTION FAN — TypeDrive - No. SpeedsMotor HP - RPMVolts / Ph / HzFLAFILTER — Furnished?TypeMax. Indoor Relative Humidity 5VENT — Size (In.)HEAT EXCHANGERType -Fired

-UnfiredGauge (Fired)ORIFICES — MainNat. Gas. Qty. — Drill SizeL.P. Gas Qty. — Drill SizeGAS VALVEPILOT SAFETY DEVICETypeBURNERS — TypeNumberPOWER CONN. — V / Ph / Hz 4Ampacity (In Amps)Max. Overcurrent Protection (Amps)PIPE CONN. SIZE (In.)DIMENSIONSCrated (In.)Uncrated (In.)WEIGHTShipping (Lbs.) / Net (Lbs.)

Variable Speed 2-Stage, 80% Upflow/Horizontal,Gas-fired Furnaces with Whole House Air CleanerModels:

1 Central Furnace heating designs are certified to ANSI Z21.47 / CSA 2.3.2 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% per 1,000 feet for elevations above 4,500 feet above sea level.3 Based on U.S. government standard tests.4 The above wiring specifications are in accordance with National Electrical Code; however, installations must comply with local codes.5 See Whole House Air Cleaner Maintenance section.

IMPORTANT — This document contains a wiring diagram and service information. This is customer property and is toremain with this unit. Please return to service information pack upon completion of work.

DISCONNECT POWER BEFORE SERVICINGWARNING

*UD2B060AFV32A*UD2B080AFV32A*UD2C080AFV42A

*UD2B100AFV32A*UD2D120AFV52A* - First letter may be “A” or “T”

*UD2B060AFV32AUpflow / Horizontal

39,00031,20060,00048,00030 - 60Direct10 x 7

1Variable

See Airflow Table1/2

Variable115/1/60

CentrifugalDirect - 2

1/100 - 2543/1727115/1/600.70/0.40

YesWhole House Air Cleaner

65%4 Round

Alum. Steel - Type 1

20

3 — 453 — 56

Redundant - Two Stage

Hot Surface IgnitionMulti-port In-shot

3115/1/60

10.5151/2

H x W x D41-3/4 x 19-1/2 x 30-1/2

40 x 17-1/2 x 28-1/2

136 / 126

*UD2B080AFV32AUpflow / Horizontal

52,00041,60080,00064,00030 - 60Direct10 x 7

1Variable


Variable115/1/60


1/100 - 2543/1727115/1/600.70/0.40


65%4 Round


20

4 — 454 — 56



4115/1/60

10.5151/2

H x W x D41-3/4 x 19-1/2 x 30-1/2

40 x 17-1/2 x 28-1/2

142 / 132

*UD2C080AFV42AUpflow / Horizontal

52,00041,60080,00064,00030 - 60Direct

10 x 101

VariableSee Airflow Table

3/4Variable115/1/60


1/100 - 2543/1727115/1/600.70/0.40


65%4 Round


20

4 — 454 — 56



4115/1/60

12.9201/2

H x W x D41-3/4 x 23 x 30-1/2

40 x 21 x 28-1/2

166 / 155

*UD2-SF-1E

*UD2-SF-1E

X342865P06

2 UD2-SF-1D

Service FactsProduct Specifications 1

MODEL

TYPE

RATINGS 21st Stage Input BTUH

1st Stage Capacity BTUH (ICS) 32nd Stage Input BTUH

2nd Stage Capacity BTUH (ICS) 3Temp. rise (Min.-Max.) °F.

BLOWER DRIVEDiameter - Width (In.)No. UsedSpeeds (No.)CFM vs. in. w.g.Motor HPR.P.M.Volts / Ph / Hz

COMBUSTION FAN — TypeDrive - No. SpeedsMotor HP - RPMVolts / Ph / HzFLA

FILTER — Furnished?TypeMax. Indoor Relative Humidity 5

VENT — Size (In.)

HEAT EXCHANGERType-Fired

-UnfiredGauge (Fired)

ORIFICES — MainNat. Gas. Qty. — Drill SizeL.P. Gas Qty. — Drill Size

GAS VALVE

PILOT SAFETY DEVICEType

BURNERS — TypeNumber

POWER CONN. — V / Ph / Hz 4Ampacity (In Amps)Max. Overcurrent Protection (Amps)

PIPE CONN. SIZE (In.)

DIMENSIONSCrated (In.)Uncrated

WEIGHTShipping (Lbs.) / Net (Lbs.)

*UD2D120AFV52A

Upflow / Horizontal

78,00062,400120,00097,00035 - 65

Direct10 x 10

1Variable

See Airflow Table1

Variable115/1/60


1/60 - 3090/2225115/1/601.14/0.51

Yes

Whole House Air Cleaner65%

4 Round


20

6 — 456 — 56


Hot Surface Ignition

Multi-port In-shot6

115/1/6015.320

1/2

H x W x D

41-3/4 x 26-1-2 x 30-1/2

40 x 24-1-2 x 28-1/2

193 / 181

*UD2B100AFV32A

Upflow / Horizontal

65,00052,000100,00080,00040 - 70

Direct10 x 7

1Variable


Variable115/1/60


1/75 - 2708/1868115/1/600.87/0.49

Yes

Whole House Air Cleaner65%

4 Round


20

5 — 455 — 56


Hot Surface Ignition

Multi-port In-shot5

115/1/6010.815

1/2

H x W x D

41-3/4 x 19-1-2 x 30-1/2

40 x 17-1/2 x 28-1/2

142 / 132

1 Central Furnace heating designs are certified to ANSI Z21.47 / CSA 2.3.2 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% per 1,000 feet for elevations above 4,500 feet above sea level.3 Based on U.S. government standard tests.4 The above wiring specifications are in accordance with National Electrical Code; however, installations must comply with local codes.

5 See Whole House Air Cleaner Maintenance section.

UD2-SF-1D 3

Service FactsSafety Section

▲ WARNING!THE CABINET MUST HAVE AN UNINTERRUPTED ORUNBROKEN GROUND ACCORDING TO NATIONAL ELEC-TRICAL CODE, ANSI/NFPA 70 - “LATEST EDITION” ANDCANADIAN ELECTRICAL CODE, CSA C22.1 OR LOCALCODES TO MINIMIZE PERSONAL INJURY IF AN ELECTRI-CAL FAULT SHOULD OCCUR. FAILURE TO FOLLOW THISWARNING COULD RESULT IN AN ELECTRICAL SHOCK,FIRE, INJURY, OR DEATH.

CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death.

The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation:

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149 Installation Codes and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.

3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the venting system are located and other deficiencies which could cause an unsafe condition.

4. Close fireplace dampers.

5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they are operating at maximum speed. Do not operate a summer exhaust fan.

6. Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so appliance is operating continuously.

7. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI Z221.1/NFPA 54 and/or CAN/CGA B149 Installation Codes.

8. After it has been determined that each appliance connected to the venting system properly vents where tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-fired burning appliance to their previous conditions of use.

▲ WARNING! ▲ WARNING!FIRE OR EXPLOSION HAZARDFAILURE TO FOLLOW THE SAFETY WARNINGS EXACTLYCOULD RESULT IN SERIOUS INJURY, DEATH OR PROP-ERTY DAMAGE.NEVER TEST FOR GAS LEAKS WITH AN OPEN FLAME.USE A COMMERCIALLY AVAILABLE SOAP SOLUTIONMADE SPECIFICALLY FOR THE DETECTION OF LEAKS TOCHECK ALL CONNECTIONS. A FIRE OR EXPLOSION MAYRESULT CAUSING PROPERTY DAMAGE, PERSONALINJURY, OR LOSS OF LIFE.

▲ WARNING!FIRE OR EXPLOSION HAZARDFAILURE TO FOLLOW THE SAFETY WARNINGS EXACTLYCOULD RESULT IN SERIOUS INJURY, DEATH OR PROP-ERTY DAMAGE.IMPROPER SERVICING COULD RESULT IN DANGEROUSOPERATION, SERIOUS INJURY, DEATH, OR PROPERTYDAMAGE.

▲ WARNING!EXPLOSION HAZARDPROPANE GAS IS HEAVIER THAN AIR AND MAY COL-LECT IN ANY LOW AREAS OR CONFINED SPACES. IFTHE GAS FURNACE IS INSTALLED IN A BASEMENT, ANEXCAVATED AREA OR A CONFINED SPACE, IT ISSTRONGLY RECOMMENDED TO CONTACT A GASSUPPLIER TO INSTALL A GAS DETECTING WARNINGDEVICE IN CASE OF A GAS LEAK.

NOTE: The manufacturer of your furnace does NOT test anydetectors and makes no representations regarding anybrand or type of detector.

BODILY INJURY CAN RESULT FROM HIGH VOLTAGE ELECTRICAL COMPONENTS, FAST MOVING FANS, AND COMBUSTIBLE GAS. FOR PROTECTION FROM THESE INHERENT HAZARDS DURING INSTALLATION 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.

▲ WARNING!

▲ WARNING!DISCONNECT POWER TO THE UNIT BEFORE REMOVINGTHE BLOWER DOOR. ALLOW A MINIMUM OF 15 SECONDSFOR IFC POWER SUPPLY TO DISCHARGE TO 0 VOLTS.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

4 UD2-SF-1D

Service Facts

▲ WARNING!DISCONNECT POWER TO THE UNIT BEFORE REMOVINGTHE BLOWER DOOR.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPERSONAL INJURY FROM MOVING PARTS.

▲ WARNING!SHOULD OVERHEATING OCCUR, OR THE GAS SUPPLYFAIL TO SHUT OFF, SHUT OFF THE GAS VALVE TO THE UNITBEFORE SHUTTING OFF THE ELECTRICAL SUPPLY.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY, OR DEATH

▲ WARNING!DO NOT TOUCH IGNITER. IT IS EXTREMELY HOT. FAILURETO FOLLOW THIS WARNING COULD RESULT IN SEVEREBURNS.

▲ WARNING!TO PREVENT INJURY OR DEATH DUE TO CONTACTWITH MOVING PARTS, TURN THE POWER TO THEFURNACE OFF BEFORE CLEANING OR SERVICING THEWHOLE HOUSE AIR CLEANER.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

▲ WARNING!

The following warning complies with State of California law, Proposition 65.

This product contains fiberglass wool insulation!

Fiberglass dust and ceramic fibers are believed by the State of California to cause cancer through inhalation. Glasswool fibers may also cause respiratory, skin, or eye irritation.

PRECAUTIONARY MEASURES

● Avoid breathing fiberglass dust.

● Use a NIOSH approved dust/mist respirator.

● Avoid contact with the skin or eyes. Wear long-sleeved, loose-fitting clothing, gloves, and eye protection.

● Wash clothes separately from other clothing: rinse 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.

FIRST AID MEASURES

Eye Contact – Flush eyes with water to remove dust. If symptoms persist, seek medical attention.

Skin Contact – Wash affected areas gently with soap and warm water after handling.

▲ WARNING!RISK OF ELECTRIC SHOCK:THESE SERVICING INSTRUCTIONS ARE FOR USE BYQUALIFIED PERSONNEL ONLY. TO REDUCE THE RISK OFELECTRIC SHOCK, DO NOT PERFORM ANY SERVICINGOTHER THAN THAT CONTAINED IN THESE OPERATINGINSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

▲ CAUTION!THE INTEGRATED FURNACE CONTROL IS POLARITYSENSITIVE. THE HOT LEG OF THE 115 VAC POWER MUSTBE CONNECTED TO THE BLACK FIELD LEAD.

▲ CAUTION!Label all wires prior to disconnection when servicingcontrols. Wiring errors can cause improper and dangerousoperation.Verify proper operation after servicing.

▲ CAUTION!High Voltage is present within the air cleaner for operation.Turn the power off and wait at least 15 seconds to allowvoltage to discharge.

▲ CAUTION!FIELD CHARGER PINS ARE SHARP. DO NOT BEND FIELDCHARGER PINS. WEAR APPROPRIATE GLOVES WHENHANDLING THE FIELD CHARGER.

UD2-SF-1D 5

Service Facts1st stage satisfied:R and W1 thermostat contacts open signaling that 1st stageheating requirements are satisfied. The gas valve will closeand the induced draft blower and whole house air cleaner willbe de-energized. The indoor blower motor will continue to runfor the heating fan off period (Field selectable at 60, 100, 140or 180 seconds), then will be de-energized by the controlmodule.

Thermostat call for heat (1-stage Thermostat)R and W1/W2 (jumpered) thermostat contacts close signalinga call for heat. 1st stage sequence of operation remains thesame as above. 2nd stage heat has a 10 minute delay fromthe time of 1st stage ignition.

Thermostat satisfied:R and W1/W2 (jumpered) contacts open signaling the controlmodule to close the gas valve and de-energize the induceddraft blower and the whole house air cleaner. The indoorblower motor will continue to operate at high heat speed forapprox. 30 seconds after the flames are extinguished andthen is switched to low heat speed for the remaining FAN-OFF period.

Indoor Blower TimingHeating: The ECM Fan Control controls the variable speedindoor blower. The blower “on” time is fixed at 45 secondsafter ignition. The FAN-OFF period is field selectable by dipswitches #2 and #3 (S1) on the Integrated Furnace Control at60, 100, 140, or 180 seconds. The factory setting is 100 sec-onds (See unit wiring diagram).

Cooling: The fan delay-off period is set by dip switches (S3)on the ECM Fan Control board connected to the IntegratedFurnace Control. The options for cooling delay off is fieldselectable by dip switches #5 and #6.

The following table and graph explain the delay-off settings:

OFF

50%50%

80%

Dehumidify

EfficiencyFast Coil Cooling

1

minute

3

minutes

7.5

minutes

100% if necessary

OFF

Sequence Of Operation

Should overheating occur, or the gas supply fail to shut off, shut off the gas valve to the unit before shutting off the electrical supply. Failure to follow this warning could result in property damage, personal injury, or death.

▲ WARNING!

BODILY INJURY CAN RESULT FROM HIGH VOLTAGE ELECTRICAL COMPONENTS, FAST MOVING FANS, AND COMBUSTIBLE GAS. FOR PROTECTION FROM THESE INHERENT HAZARDS DURING INSTALLATION 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.

▲ WARNING!

▲ CAUTION!THE INTEGRATED FURNACE CONTROL IS POLARITYSENSITIVE. THE HOT LEG OF THE 115 VAC POWER MUSTBE CONNECTED TO THE BLACK FIELD LEAD.

NOTE: Whole House Air Cleaner is energized when bloweris operating and there is a call for heat or cool. This canresult in brief periods of blower operation with the wholehouse air cleaner off. This can occur during the heat fanoff period or if the enhanced mode of operation is chosenfor cooling.

Thermostat call for heat (2-stage thermostat)Call for 1st stage only:R and W1 thermostat contacts close signaling the controlmodule to run its self-check routine. After the control modulehas verified that the 1st stage pressure switch contacts areopen and the limit switch(es) contacts are closed, the draftblower will be energized.

As the induced draft blower comes up to speed, the pressureswitch contacts will close and the ignitor warm up period willbegin. The igniter will heat for approx. 17 seconds, then thegas valve is energized in 1st stage to permit gas flow to theburners. The flame sensor confirms that ignition has beenachieved within the 4 second ignition trial period.

As the flame sensor confirms that ignition has been achieved,the delay to fan ON period begins timing and after approx. 45seconds the indoor blower motor will be energized at lowspeed and will continue to run during the heating cycle. Thewhole house air cleaner is energized.

Call for 2nd stage after 1st stage:R and W2 thermostat contacts close signaling a call for 2ndstage heat. After a 30 second delay, the induced draft blowerwill be energized on high speed and the 2nd stage pressureswitch contacts will close allowing the gas valve to be ener-gized in 2nd stage and the indoor blower motor in high speed.

2nd stage satisfied, 1st stage still called:R and W2 thermostat contacts open signaling that 2nd stageheating requirements are satisfied. The induced draft bloweris reduced to low speed allowing the 2nd stage pressureswitch contacts to open and the gas valve is reduced to 1ststage. After approx. 30 seconds the indoor blower motor isreduced to low speed.

COOLING OFF - DELAY OPTIONS

SWITCH SETTINGS SELECTION NOMINALAIRFLOW

5 - OFF 6 - OFF NONE SAME

5 - ON 6 - OFF 1.5 MINUTES 100% *

5 - OFF 6 - ON 3 MINUTES 50%

5 - ON 6 - ON ** 50 - 100%

* - This setting is equivalent to BAY24X045 relay benefit

** - This selection provides ENHANCED MODE, which is aramping up and ramping down of the blower speed to provideimproved comfort, quietness, and potential energy savings.See Wiring Diagram notes on the unit or in the Service Factsfor complete wiring setup for ENHANCED MODE. The graphwhich follows, shows the ramping process.

6 UD2-SF-1D

Service FactsPeriodic Servicing Requirements

▲ WARNING!Disconnect power to the unit before removing the blowerdoor. Allow a minimum of 15 seconds for IFC power supplyto discharge to 0 volts.Failure to follow this warning could result in personal injuryfrom moving parts.

▲ WARNING!CARBON MONOXIDE POISONING HAZARD

Failure to follow the service and/or periodic maintenanceinstructions for the furnace and venting system, couldresult in carbon monoxide poisoning or death.

▲ WARNING!NEVER USE AN OPEN FLAME TO TEST FOR GAS LEAKS.AN EXPLOSION COULD OCCUR, CAUSING INJURYOR DEATH.

▲ CAUTION!Label all wires prior to disconnection when servicingcontrols. Wiring errors can cause improper and danger-ous operation.Verify proper operation after servicing.

1. GENERAL INSPECTION – Examine the furnaceinstallation annually for the following items:

a. All flue product carrying areas external to the furnace(i.e. chimney, vent connector) are clear and free ofobstruction. 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 isphysically sound without holes or excessive corrosion.

c. The return air duct connection(s) is physically sound,is sealed to the furnace and terminates outside thespace containing the furnace.

d. The physical support of the furnace should be soundwithout sagging, cracks, gaps, etc., around the base soas to provide a seal between the support and the base.

e. There are no obvious signs of deterioration of thefurnace.

2. WHOLE HOUSE AIR CLEANER – The Whole HouseAir Cleaner has two components to be cleaned. TheCOLLECTION CELL should be cleaned every 30 to 90days, depending on the home environment. The FIELDCHARGER should be cleaned annually by a trainedservice technician.

3. BLOWERS – The blower size and speed determine theair volume delivered by the furnace. The blower motorbearings are factory lubricated and under normaloperating conditions do not require servicing. If motorlubrication is required it should only be done by aqualified servicer. Annual cleaning of the blower wheeland housing is recommended for maximum air output,and this must be performed only by a qualified serviceror service agency.

▲ CAUTION!Do NOT touch igniter. It is extremely hot.

4. IGNITER – This unit has a special hot surface directignition device that automatically lights the burners.Please note that it is very fragile and should be handledwith care.

5. BURNER – Gas burners do not normally require sched-uled servicing, however, accumulation of foreign materialmay cause a yellowing flame or delayed ignition. Eithercondition indicates that a service call is required. Forbest operation, burners must be cleaned annually usingbrushes and vacuum cleaner.

Turn off gas and electric power supply. To clean burners,remove burner box cover (6 to 8 screws) and top burnerbracket. Lift burners from orifices.

NOTE: Be careful NOT to break igniter when removingburners.

Clean burners with brush and/or vacuum cleaner. Reas-semble parts by reversal of the above procedure. Theburner box must be resealed when replacing box cover.

NOTE: On LP (propane) units, some light yellow tipping ofthe outer mantle is normal. Inner mantle should be brightblue.Natural gas units should not have any yellow tipped flames.This condition indicates that a service call is required. Forbest operation, burners must be cleaned annually usingbrushes and vacuum cleaner.

NOTE: On LP (propane) units, due to variations in BTUcontent and altitude, servicing may be required at shorterintervals.

6. HEAT EXCHANGER/FLUE PIPE – These items must beinspected for signs of corrosion, and/or deterioration atthe beginning of each heating season by a qualified servicetechnician and cleaned annually for best operation. Toclean flue gas passages, follow recommendations below:

a. Turn off gas and electric power supply.

b. Inspect flue pipe exterior for cracks, leaks, holes orleaky joints. Some discoloration of PVC pipe isnormal.

c. Remove burner compartment door from furnace.

d. Inspect around insulation covering flue collector box.Inspect induced draft blower connections fromrecuperative cell and to the flue pipe connection.

e. Remove burners. (See 4.)

f. Use a mirror and flashlight to inspect interior of heatexchanger, be careful not to damage the igniter, flamesensor or other components.

g. If any corrosion is present, contact a service agency.Heat exchanger should be cleaned by a qualifiedservice technician.

h. After inspection is complete replace burner box cover,burners, and furnace door.

i. Restore gas supply. Check for leaks using a soapsolution. Restore electrical supply. Check unit fornormal operation.

UD2-SF-1D 7

Service FactsCLEANING THE COLLECTION CELL1. Turn the air conditioning system off at the Comfort

Control and turn off service disconnect.

2. Remove Blower Door.

3. Slide COLLECTION CELL out of Furnace.

CLEANINGThe COLLECTION CELL may be cleaned either byvacuuming (recommended method) or by washing.

VACUUM CLEANINGRemove the COLLECTION CELL from the conditionedspace before vacuuming. Vacuum both sides of the COL-LECTION CELL to clean.

WASHINGUse low-pressure water spray, such as a sink sprayer orgarden hose to clean the COLLECTION CELL. Someresidue may require warm water to be removed.

• Do NOT use soap or detergent in cleaning theCOLLECTION CELL

• Do NOT immerse the COLLECTION CELLcompletely in water

• Do NOT place the COLLECTION CELL into adishwasher to clean.

• ALLOW THE COLLECTION CELL TO DRYTHOROUGHLY BEFORE REINSTALLING.

Slightly tap the COLLECTION CELL to remove waterretained in the filter. Allow the COLLECTION CELL todry thoroughly before reinstalling.

WHOLE HOUSE AIR CLEANERMAINTENANCE1. For maximum efficiency the COLLECTION CELL should

be inspected and cleaned on a regular basis.

NOTE: A 30 to 90 day cleaning interval isnormal for the COLLECTION CELL andshould be adjusted based upon unit run timeand the home environment.

2. The FIELD CHARGER must be removed and cleanedonly by a qualified service professional.

3. The FIELD CHARGER must be cleaned at least once ayear.

4. The FIELD CHARGER may require more frequentcleaning in homes with high indoor relative humidity (greater than 65% RH).

5. Consult your service professional about cleaningintervals.

▲ WARNING!TO PREVENT INJURY OR DEATH DUE TO CONTACTWITH MOVING PARTS, TURN THE POWER TO THEFURNACE OFF BEFORE CLEANING OR SERVICING THEWHOLE HOUSE AIR CLEANER.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

▲ CAUTION!High Voltage is present within the air cleaner for operation.Turn the power off and wait at least 15 seconds to allowvoltage to discharge.

▲ WARNING!RISK OF ELECTRIC SHOCK: THESE SERVICING IN-STRUCTIONS ARE FOR USE BY QUALIFIED PERSONNELONLY. TO REDUCE THE RISK OF ELECTRIC SHOCK, DONOT PERFORM ANY SERVICING OTHER THAN THATCONTAINED IN THESE OPERATING INSTRUCTIONSUNLESS YOU ARE QUALIFIED TO DO SO.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

NOTE: System InformationBefore cleaning the coil or ducts in the furnace, removethe COLLECTION CELL and FIELD CHARGER from the aircleaner. Chemicals used during the cleaning of theFurnace, or ductwork can damage the air cleaner compo-nents and degrade the performance of the air cleaner.

8 UD2-SF-1D

Service FactsCLEANING THE FIELD CHARGER

▲ CAUTION!FIELD CHARGER PINS ARE SHARP. DO NOT BEND FIELDCHARGER PINS. WEAR APPROPRIATE GLOVES WHENHANDLING THE FIELD CHARGER.

1. Turn off the Comfort Control and the servicedisconnect.

2. Turn off power to the Furnace and remove thelower furnace door panel.

3. Remove COLLECTION CELL.

4. Remove the inner blower door panel by removingfour screws.

5. Disconnect green return wire and red high voltagewire. To remove high voltage wire, twist and pullconnecter apart.

6. Remove the two 5/16" hold down screws at the frontcenter.

7. Lift up the front of the FIELD CHARGER and slideforward to remove from the case. Lay the FIELDCHARGER on a secured flat surface.

8. Wipe down the face Plate of the FIELD CHARGERwith a dry shop towel or use a vacuum cleaner. Donot disassemble the FIELD CHARGER.

NOTE: Do NOT use water, soap, detergent, or chemicals toclean the FIELD CHARGER.

9. To clean pins, push a block of foam down over theFIELD CHARGER Pin.

10. Rotate the foam block on the FIELD CHARGERPin.

11. Use the foam block to clean the faceplate openingedges.

12. Repeat steps 9 and 10 for each FIELD CHARGERPin.

13. Reverse steps to reassemble the air cleaner. Theinner blower door MUST be reinstalled.

Figure 2

Figure 1

UD2-SF-1D 9

Service FactsFIELD CHARGER (Troubleshooting)

1. Remove the lower furnace door.

2. Remove the COLLECTION CELL. See Figure 3.

3. Press the door switch to energize unit.

4. Ground the insulated screwdriver to the un-painted inner blower door. Screwdriver mustremain touching the inner blower door to ensuregrounding. See Figure 4.

NOTE: Screwdriver must be “Insulated” to test the HighVoltage FIELD CHARGER !

5. Extend the screwdriver tip within 1/2"-1/4" fromthe emitter. See Figure 5. Look for a spark toverify that the FIELD CHARGER is energized.

Figure 5 Touching the Emitter Pin

Figure 4 - Ground Insulated Screw Driveragainst Inner Blower Door

Figure 3 COLLECTION CELL Removal

10 UD2-SF-1D

Service FactsSTEPS TO EVALUATE AN INTEGRATEDCOMPONENT FAILURE

NOTE: Read and Follow all Warnings and Cautionscontained in this document BEFORE evaluating thewhole house air cleaner for any component failures.

1. Turn the thermostat system and fan switches tothe “OFF” positions

2. Disconnect all power supplies from the unit.

3. Remove the Inner Blower Door.

4. Disconnect the high voltage wire and the greenreturn wire between the power supply and theFIELD CHARGER.

5. Power the unit and energize the indoor blower.Wait one minute.

6. Look for the Green LED on the power supply tobe on steady.

7. If yes, the power supply is working properly.Proceed to step #9.

8. If no, replace the power supply and retest.

9. Turn off the power to the unit, remove theCOLLECTION CELL and reconnect the wires tothe FIELD CHARGER.

10. Repeat steps #5 and #6.

11. If yes, the power supply and the FIELDCHARGER are working properly. Proceed to step#13.

12. If no, FIELD CHARGER has a problem and mustbe replaced.

13. Turn the power to the unit off install theCOLLECTION CELL.

14. Repeat steps #5 and #6.

15. If yes, the COLLECTION CELL and the FIELDCHARGER are working properly.

16. If no, the COLLECTION CELL has a problem.Replace the COLLECTION CELL.

UD2-SF-1D 11

Service Facts

To Pin #12

To Pin #15

To Pin #1 & #3

24 V.A.C. #9 PIN WIRE IS ORANGE

#1 PIN WIRE IS BLUE

Quick Check M otor Will N ot Run

ECM -2TM

QUICK CHECKBlower Motor Will Not Run

1. Jumper 24 V olt A.C. "R" T erminal to "G" terminal on theLow Voltage Terminal board .

Does motor run ?

NO: Go to step #2.YES: Motor runs,check Comfort Controland Comfort Control wire.

2. Unplug 16 wire low voltage harness from the interface board .Jumper 24 V olts A.C. to pins #12, #15 and common pins #1 and #3.

Does the motor run ?

NO: Go to step #3.YES: Replace the

variable speedinterface boardon the furnace.

These service procedures will work on ECM-2TM motors and their motorcontrol board and their 16 Wire Low Voltage Control Cable.

Jumper

12 UD2-SF-1D

Service Facts

GROUND

TO PIN #4

TO PIN #5

A.C. VOLTS

#3

#4

#5

Quick Check M otor Will N ot Run

3. U nplug 16 wire low voltage harness fr om the motor .Jumper 24 V olts A.C. to motor low voltage plug pins #12and #15 and pins #1 and #3 which are common .

Does motor run ?

NO: Go to step #4.YES: Fault is in the16 wire low voltageharness. Repair orreplace it.

4. I s the line voltage to the motor high voltage power plugpin #4 and pin #5 correct ?

NO: Correct line voltage fault.YES: Live voltage correct andmotor will not run.Replace motor.

TO PIN #1 & #3

24 VOLT A.C.

UD2-SF-1D 13

Service FactsTrouble Shooting Kit

TROUBLESHOOTING ECM-2™ MOTORWITH TROUBLESHOOTING CIRCUIT BOARD

AND 4 WIRE TEST CABLE

ECM-2™ TROUBLESHOOTER KITOrder Pub. No. 34-3403-01

Purpose: Verify proper signals are being received by the motor control board and are beingsent to the ECM-2™ Motor by the 16 wire low voltage motor harness.

1. Turn power off2. Disconnect all low voltage field wiring,

set all dip switches to “OFF”.3. Disconnect the 16-pin connector at the

ECM-2™ Motor. Plug in the “Troubleshooter”to the harness.

4. Turn on power.5. The troubleshooter “R” L.E.D. on the board

should be on.6. If the troubleshooter “R” L.E.D. is not

on, check for 24 volts A.C. at the motorcontrol board.

7. If 24 volts A.C. is not present, troubleshootand repair as needed.

8. If 24 volts A.C. is present, check the trouble-shooter “R” L.E.D. and check continuity of the16 wire cable, pin 1 to pin 1, through pin 16. Iftroubleshooter “R” L.E.D. is good and 16 wirecable pin #1 and pin #12 are good, repair orreplace motor control board.

9. The green “C.F.M.” L.E.D.’s should beflashing on the motor control board andtroubleshooting board. If the green CFML.E.D. on the motor control board does notflash, check the troubleshooter “CFM” L.E.D.and continuity of the 16 wire harness, pin #8and #16. If troubleshooter “CFM” L.E.D.and harness are good, replace motorcontrol board.

14 UD2-SF-1D

Service FactsTrouble Shooting Kit

Dip Switch Operation

10. In order, turn on dip-switches 1 through 8,one at a time.

11. Verify that the corresponding L.E.D. on thetroubleshooter is being turned on: Dip switch1 on, L.E.D. DS-1 is on.

12. Turn off dip switches 1 through 8 and verifyeach LED goes off.

13. If the correct L.E.D.’s do not turn on and off inthe proper sequence, check continuity of the16 wire harness with ohmmeter: pin 1 goesto pin 1, pin 2 to pin 2, etc. through pin 16. Ifharness is good, replace motor controlboard. If harness is bad, repair or replace.

Low VoltageComfort Control Operation14. Verify thermostat signals by jumping

“R” to each of the low voltage terminalconnections on a package unit use the wirenut connectors, as follows: BK, O, Y YLO, G,W1, W2, W3. See exceptions below for airhandlers, furnaces, package gas electric orretro fit motor control boards. Thecorresponding L.E.D. on the troubleshootershould light when “R” is applied. VerifyL.E.D.’s on motor control board lightaccording to the applied signal: BK, Y YLO,fan. If L.E.D. on motor control board does notlight and 16 wire harness is good, replaceboard.

Retro Fit Motor Control Board

Retro fit motor control board W2 is notconnected and will not light W2 ontroubleshooter.

UD2-SF-1D 15

Service FactsWiring Diagram

(continued on next page)

Electrical Data

From Dwg. D342895P01

16 UD2-SF-1D

Service FactsSchematic Diagram

From Dwg. D342895P01

UD2-SF-1D 17

Service Facts

Performance Data

SW1 SW2 SW3 SW4 0.1 0.3 0.5 0.7 0.9

CFM 517 535 538 546 542

Watts 49 76 105 141 171

CFM 587 594 629 622 618

Watts 61 89 129 159 196

CFM 642 677 705 701 696

Watts 73 109 151 185 222

CFM 676 705 729 736 738

Watts 79 118 159 198 240

CFM 776 814 833 863 867

Watts 103 150 200 251 298

CFM 870 928 961 974 975

Watts 137 198 259 316 361

CFM 831 883 915 935 941

Watts 122 182 238 292 345

CFM 1023 1052 1055 1061 1048

Watts 203 266 316 370 413

CFM 1156 1174 1188 1196 1085

Watts 280 351 415 482 442

CFM 1063 1094 1090 1100 1070

Watts 226 290 344 397 430

CFM 1214 1241 1263 1234 1123

Watts 320 395 476 514 469

CFM 1399 1409 1377 1278 1164

Watts 486 575 604 559 507

Notes:

1. * First letter may be "A" or "T".

2. ** Factory setting.

3. Continuous Fan Setting: Heating or cooling airflow is approximately 50% of selected cooling value.

4. For variable speed low speed airflows are approximately 30% of listed values.

5. LOW 350 cfm/ton is recommended for variable speed application for COMFORT & HUMID CLIMATE setting; NORMAL is 400 cfm/ton;

HIGH 450 cfm/ton is for DRY CLIMATE setting.

OFF

Low (350

CFM/Ton)ON

OFFHigh (450

CFM/ton)

Co

olin

g

*UD2B060AFV32A Furnace Cooling Airflow (CFM) and Power (Watts) vs. External Static Pressure With Filter

Unit

Outdoor

Airflow

Setting

Dip Switch Setting External Static Pressure

1.5

OFF ON

Normal (400

CFM/ton)

ON

ON

OFF

ON

OFF

OFF

ON

OFF

OFF

OFF

ON

ON ON

ON

ONOFFON

ON

OFF

OFF ON

OFF

OFFONON

ON OFF

OFF

OFF

OFF

ON

OFFOFF

OFF

OFF

OFFONOFF

3** OFF OFF

High (450

CFM/ton)

ONOFFOFF

2

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

2.5

Low (350

CFM/Ton)

Normal**

(400

SW7 SW8 0.1 0.3 0.5 0.7 0.9

CFM 583 590 625 622 620

Temp. Rise 50 49 46 46 47

Watts 60 87 126 157 192

CFM 635 687 701 695 694

Temp. Rise 45 42 41 42 42

Watts 69 110 148 183 221

CFM 746 778 803 819 823

Temp. Rise 39 37 36 35 35

Watts 97 140 185 230 272

CFM 779 816 848 866 874

Temp. Rise 57 54 52 51 51

Watts 104 152 201 255 302

CFM 872 939 964 976 985

Temp. Rise 51 47 46 46 45

Watts 136 203 264 312 365

CFM 1069 1102 1102 1110 1078

Temp. Rise 42 40 40 40 41

Watts 227 293 345 403 429

High

He

atin

g

Heating

1st Stage

Heating

2nd

Stage

ON

ON

*UD2B060AFV32A Furnace Heating Airflow (CFM) and Power (watts) vs. External Static Pressure With Filter

Airflow

Setting


ON

OFF

OFF

OFF

Low

Medium**

Low

Medium**

High

ON

ON

ON

OFF

OFF

OFF

18 UD2-SF-1D

Service Facts

SW7 SW8 0.1 0.3 0.5 0.7 0.9

CFM 846 852 836 811 810

Temp. Rise 46 45 46 48 48

Watts 127 167 200 229 270

CFM 969 956 936 915 897

Temp. Rise 40 40 41 42 43

Watts 182 218 251 283 317

CFM 1126 1116 1108 1095 1074

Temp. Rise 34 35 35 35 36

Watts 270 316 361 404 441

CFM 1216 1205 1189 1169 1111

Temp. Rise 49 49 50 51 53

Watts 333 383 429 468 473

CFM 1362 1347 1324 1254 1145

Temp. Rise 44 44 45 47 52

Watts 468 518 559 550 500

CFM 1474 1419 1370 1258 1148

Temp. Rise 40 42 43 47 52

Watts 590 601 609 558 506

He

ati

ng

Heating

1st Stage

Heating

2nd

Stage

ON

OFF

OFF

OFF

Medium** ON

High OFF


Airflow

Setting


Low

Medium**

Low

ON

ON

ON

OFFHigh

ON

OFF

SW1 SW2 SW3 SW4 0.1 0.3 0.5 0.7 0.9

CFM 934 926 913 889 863

Watts 162 201 236 267 296

CFM 1063 1051 1042 1029 1008

Watts 228 272 315 356 394

CFM 1220 1212 1199 1179 1119

Watts 334 386 433 471 475

CFM 1131 1122 1111 1101 1083

Watts 269 317 361 405 442

CFM 1310 1295 1273 1246 1136

Watts 405 457 498 535 490

CFM 1458 1420 1369 1266 1154

Watts 569 599 606 561 506

CFM 1329 1310 1287 1253 1142

Watts 424 472 516 542 493

CFM 1475 1422 1369 1272 1158

Watts 585 596 605 563 510

CFM 1473 1421 1367 1269 1152

Watts 585 595 605 558 505

Notes: rpm 1192 1239 1285 1303 1315







ON OFF

OFF ON

Normal (400

CFM/ton)OFF ON OFF OFF

Co

olin

g


Unit

Outdoor

Airflow

Setting


2.5

High (450

CFM/ton)

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

Low (350

CFM/Ton)

Normal (400

CFM/ton)

OFF

3.5**

3

ON

OFFOFFOFF

OFF OFF

OFF

ONOFFOFF

OFF ON

OFF

OFFONOFF

ON

OFF

OFF ONHigh (450

CFM/ton)

Low (350

CFM/Ton)

OFF

OFF

ON

ON

ON

OFF

OFF

UD2-SF-1D 19

Service Facts

SW7 SW8 0.1 0.3 0.5 0.7 0.9

CFM 745 758 758 761 735

Temp. Rise 52 51 51 51 52

Watts 68 111 153 197 231

CFM 839 864 851 851 822

Temp. Rise 46 45 45 45 47

Watts 87 134 181 224 263

CFM 934 961 943 941 933

Temp. Rise 41 40 41 41 41

Watts 110 164 211 263 310

CFM 1064 1077 1085 1086 1077

Temp. Rise 56 55 55 55 55

Watts 152 205 262 325 379

CFM 1197 1226 1241 1230 1229

Temp. Rise 50 48 48 48 48

Watts 201 271 338 395 462

CFM 1345 1375 1376 1371 1320

Temp. Rise 44 43 43 43 45

Watts 272 348 418 480 517

High OFF

Medium** ON

ON

*UD2C080AFV42A Furnace Heating Airflow (CFM) and Power (watts) vs. External Static Pressure With Filter

Airflow

Setting


Low

High

Low

Medium**

ON

ON

He

ati

ng

Heating

1st Stage

Heating

2nd

Stage

OFF

OFF

ON ON

OFF

OFF

OFF

SW1 SW2 SW3 SW4 0.1 0.3 0.5 0.7 0.9

CFM 840 862 850 846 824

Watts 87 135 182 223 264

CFM 962 977 974 973 965

Watts 118 167 221 276 320

CFM 1076 1095 1104 1102 1096

Watts 153 212 271 331 390

CFM 1004 1018 1016 1019 1007

Watts 130 183 236 297 343

CFM 1143 1176 1187 1184 1180

Watts 180 267 311 368 436

CFM 1303 1334 1337 1334 1296

Watts 252 326 394 456 502

CFM 1167 1193 1208 1196 1193

Watts 190 255 321 378 443

CFM 1356 1378 1383 1358 1321

Watts 279 355 424 473 518

CFM 1521 1528 1537 1537 1344

Watts 379 545 534 606 556

CFM 1351 1376 1377 1364 1312

Watts 275 357 422 467 515

CFM 1537 1548 1561 1534 1347

Watts 392 468 552 606 538

CFM 1738 1755 1735 1568 1382

Watts 543 652 708 635 563

Notes:







OFF

OFF

ON

OFF

ON

ON

ON

ON

ON

*UD2C080AFV42A Furnace Cooling Airflow (CFM) and Power (Watts) vs. External Static Pressure With Filter


OFF

ONOFFON

ON ON

OFF

OFFONON

ON

OFFOFFON

ON OFF

OFF

ONOFFOFF

OFF

OFFONOFF

ON

OFFOFF

OFF OFF ON

OFFOFF4**

3.5

3

2.5

OFF OFF OFF

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

OFF OFF

ON OFF

Airflow

Setting

Normal (400

CFM/ton)

High (450

CFM/ton)

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

Co

olin

g

Unit

Outdoor

Low (350

CFM/Ton)

Normal**

(400

High (450

CFM/ton)

Low (350

CFM/Ton)

20 UD2-SF-1D

Service Facts

SW7 SW8 0.1 0.3 0.5 0.7 0.9

CFM 764 795 832 852 848

Temp. Rise 63 61 58 56 57

Watts 103 147 195 242 280

CFM 875 938 963 974 959

Temp. Rise 55 60 58 57 58

Watts 139 200 259 305 344

CFM 984 1029 1040 1039 980

Temp. Rise 49 47 46 46 49

Watts 185 253 304 347 357

CFM 1118 1138 1157 1125 1018

Temp. Rise 66 65 64 66 73

Watts 262 326 390 417 383

CFM 1310 1335 1277 1192 1097

Temp. Rise 57 55 58 62 68

Watts 411 498 498 472 441

CFM 1413 1399 1322 1233 1148

Temp. Rise 52 53 56 60 65

Watts 512 566 541 514 484

OFF

OFF

OFF

OFF

He

ati

ng

Heating

1st Stage

Heating

2nd

Stage

OFF

OFF

ON ON

ONLow

High

Low

Medium**

ON

ON

High

Medium** ON


Airflow

Setting


SW1 SW2 SW3 SW4 0.1 0.3 0.5 0.7 0.9

CFM 538 556 574 579 570

Watts 54 80 113 145 176

CFM 598 626 654 647 647

Watts 64 94 131 162 200

CFM 657 706 713 724 730

Watts 75 116 151 187 227

CFM 688 729 745 753 763

Watts 81 124 161 199 238

CFM 785 831 859 872 881

Watts 109 157 207 253 294

CFM 887 939 964 977 954

Watts 146 206 260 309 343

CFM 848 907 934 946 946

Watts 133 188 245 289 334

CFM 1018 1044 1055 1065 983

Watts 206 262 319 370 357

CFM 1139 1160 1184 1122 1020

Watts 274 344 411 417 386

CFM 1071 1089 1105 1108 1003

Watts 231 290 346 399 368

CFM 1208 1246 1249 1153 1060

Watts 323 411 469 441 410

CFM 1387 1383 1295 1221 1124

Watts 482 546 517 499 467

Notes:







Co

olin

g

Unit

Outdoor

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

Low (350

CFM/Ton)

Airflow

Setting

Normal (400

CFM/ton)

High (450

CFM/ton)

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

OFF OFF OFF

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

OFF OFF

ON OFF

3.0**

2.5

2

1.5

OFF

OFF OFF ON

OFFOFF

OFF

ONOFFOFF

OFF

OFFONOFF

ON

OFF

ON

OFFOFFON

ON OFF

OFF

ONOFFON

ON ON

OFF

OFFONON



ON

ON

ON

OFF

OFF

ON

OFF

ON

ON

UD2-SF-1D 21

Service Facts

SW7 SW8 0.1 0.3 0.5 0.7 0.9

CFM 1003 1039 1062 1033 1034

Temp. Rise 58 56 54 56 56

Watts 125 182 246 309 356

CFM 1137 1193 1185 1197 1185

Temp. Rise 51 48 49 48 49

Watts 170 239 293 370 446

CFM 1262 1290 1327 1344 1331

Temp. Rise 46 45 44 43 43

Watts 218 286 366 440 534

CFM 1415 1454 1476 1500 1421

Temp. Rise 63 61 60 59 63

Watts 297 378 453 534 561

CFM 1645 1672 1701 1659 1456

Temp. Rise 54 53 52 54 61

Watts 435 539 632 671 580

CFM 1834 1857 1837 1686 1506

Temp. Rise 48 48 48 53 59

Watts 608 705 778 699 630

OFF

Medium** ON

Airflow

Setting


Low

High

Low

Medium**

ON

ON

ON

High

He

ati

ng

Heating

1st Stage

Heating

2nd

Stage

OFF

OFF

ON ON

OFF

*UD2D120AFV52A Furnace Heating Airflow (CFM) and Power (watts) vs. External Static Pressure With Filter

OFF

OFF

SW1 SW2 SW3 SW4 0.1 0.3 0.5 0.7 0.9

CFM 1141 1197 1205 1196 1188

Watts 170 246 299 369 443

CFM 1325 1374 1403 1434 1412

Watts 252 332 408 496 567

CFM 1536 1575 1615 1619 1474

Watts 370 464 563 640 605

CFM 1334 1376 1424 1411 1417

Watts 251 330 415 469 562

CFM 1582 1628 1659 1663 1465

Watts 387 491 595 672 595

CFM 1813 1836 1838 1707 1504

Watts 577 684 771 710 620

CFM 1704 1731 1733 1735 1552

Watts 489 589 666 750 663

CFM 1960 1971 1937 1799 1602

Watts 739 841 891 813 700

CFM 2208 2107 1970 1849 1683

Watts 1080 1025 942 863 776

Notes:







Co

olin

g

ON

ON

OFF

ON

OFF

OFF

OFF

*UD2D120AFV52A Furnace Cooling Airflow (CFM) and Power (Watts) vs. External Static Pressure With Filter

External Static Pressure

OFF

ONOFFON

OFF ON

OFF

OFF

OFF

ONON

ON

OFFOFFOFF

OFF OFF

OFFONOFF

5** OFF OFF

High (450

CFM/ton)

ONOFFOFF

4

3.5

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

ON OFF

Airflow

Setting

Normal (400

CFM/ton)

Low (350

CFM/Ton)

Normal (400

CFM/ton)

High (450

CFM/ton)

Dip Switch Setting

OFF

OFF

Unit

Outdoor

Low (350

CFM/Ton)

22 UD2-SF-1D

Service FactsHumidistat HookupIf an optional humidistat is to be connected between “R”and “BK”, the factory installed jumper between “R” and “BK”on the circuit board must be cut. If an optional Humidistat isused, the jumper must also be cut when applying an airflowcommand signal to the “BK” input such as with the variablespeed single-zone and multi-zone system controller. Onsingle speed cooling only/non-heat pump systems, jumper “Y”to “O” for proper operation of the delay profiles and thehumidistat For two compressor or two speed systems,jumper “Ylo” to “O.”

INTEGRATED FURNACE CONTROLGREEN "STATUS" LED FLASH CODES

Flashing Slow --- Normal - No call for Heat

Flashing Fast --- Normal - Call for Heat

Fault Code ResetThe last 4 fault codes can be erased from memory by power-ing up the control with “G” energized and then applying “R” tothe “W1” terminal 3 times within 6 seconds. The control willacknowledge the reset by turning on the Red LED for 2 sec-onds.

Fault Code RecoveryOn power up, last 4 faults, if any, will be flashed on the RedLED. The newest fault detected will flash first and the oldestlast. There will be a 2 second delay between fault codeflashes. Solid Red LED error codes will not be displayed.

The Green LED will be on solid during last fault recovery. Atany other time the control is powered, the Green LED indica-tor light will operate as shown in Table 14 and the Red LEDwill flash LitePort data (one flash) every 20 seconds.

The factory installed jumper between“R” and “BK” on the circuit boardmust be cut if an optional Humidistatis installed.

Figure 6

*UX Integrated Furnace Control

Red LitePort™ LEDGreen Status LED

Figure 7

UD2-SF-1D 23

Service FactsINTEGRATED FURNACE CONTROL ERROR FLASH CODES

Flashing Slow --- Normal - No call for HeatFlashing Fast --- Normal - Call for HeatContinuous ON --- Replace IFCContinuous OFF --- Check Power2 Flashes --- System Lockout (Retries or Recycles exceeded)

3 Flashes ---

Draft Pressure Error - Possible problems a) Venting problem b) Pressure seitch problem c) Inducer problem

4 Flashes --- Open High Limit Device5 Flashes --- Flame sensed when no flame should be present6 Flashes --- 115 Volt AC power reversed or Poor Grounding7 Flashes --- Gas valve circuit error8 Flashes --- Low flame sense signal

9 Flashes ---Check Ignitor circuit and Line "N" to 24VAC"Common" voltage (< 2volts)(possible grounding problem)

NOTE: Before changing the position of the High Voltageselector switch on the High Voltage power supply, makesure the power has been removed from the High Voltagepower supply.

NOTE: In normal operation, the furnace makes a slightsound as the air passes through and is cleaned. Insome applications, you may notice this sound comingfrom the return air vent(s). If desired, this sound levelcan be reduced with minimal impact on air cleaningefficiency by reducing the power setting of the FIELDCHARGER. The unit is shipped with the power set at9.6KV (high). If sound is heard, reduce power level to8.0KV (low) at the switch on the power supply.

LED

High Voltage switch9.6 to 8.0 KVDC

Return from air cleaner

High voltage power lead

24 VAC Hot

24 VAC Common

Green

Pink

Red

Blue

9.6 KVDC is top down |\8.0 KVDC is bottom down |/

Figure 8

24 UD2-SF-1D

Service Facts

UD2-SF-1D 25

Service Facts

F1

HUMHUMCIRC

EACXFMR

CRC

CRCXFMR

XFMRLINE

HUMHUMCIRC

EACXFMR LO HEAT

LO HEAT

HI HEAT

HI HEAT

EAC

EAC

COOL

COOL

PARK

PARK

LINE

LINE

LINE

5

1 2

1234

OFF ON

S1

1 2 3 4

1 2 3 4

5 6 7 8

5 6 7 8

ONOFF

CFM

K1

K2

K7

K3

E4

Q22

C17

U3

U1K8

K6

BK W2 W1 R G B Y YLO O

BK W2 W1 R G B Y YLO O

K8

RV2

HOTNEUTRAL

DS1

E1

3

6

9

12

1

4

7

10

8

16

7

15

6

14

5

13

4

12

3

11

2

10

1

9

W14BK JUMPER

CNT05120

Line Voltage Connections

24 volt Furnace

Component

Connections

5 Amp Control

Fuse

Low Voltage Terminal Strip

Fault LED (Red)

16 pin ECM

Connector

BK Jumper

Indoor airflow

configuration

dip switches

Heat “Off” Delay

Switches

E4

5 - IGN-N

4 - IND-N

3 - IND-Lo

2 - IND-Hi

1 - IGN-H

26 UD2-SF-1D

Service Facts

UD2-SF-1D 27

Service Facts

Is the IFC LED flashing?

Is high voltage power supplied

to the unit?

Refer to Gas Furnace Silicon Nitride Ignitor Models Service Manual to supplement this

information. Publication Number 34-3405-09

NO

NO Replace IFC

YES

Is 24VAC low voltage present from transformer

and fuse goodYES

NO

Repair low voltage wiring, replace transformer, or fuse as needed

Repair high voltage connection to unit.

What is the fault light flash code? See FAULT LED Flash Codes page

YES Are connections and

wiring in working condition?

Repair connections

NO

Close and hold door switch

YES

GETTING STARTED

28 UD2-SF-1D

Service Facts

2 Flash Fault LED

Cycle power to furnace and call for 1st stage of

heat

Does gas ignite?

YES

NO

Is 1st stage outlet gas pressure

~1.7"WC (NG)~6.0"WC (LP)

YES

Do all burners ignite within 5

seconds?Check igniter position and

correct if needed. Check operation

Adjust manifold gas pressure to ~1.7"WC (NG)~6.0"WC (LP)

Check operation

NO

Clean and align burners correctly.Check operation

NO

YES

Measure flame current. Is flame

current less than 1 micro-amp?

(3-4 ua = Normal)

YESIs flame sensor

located correctly?

Replace flame sensor. Check

operationYES

Correct and check operation

NO

Flame sensor is good

NO

Is minimum outlet gas manifold pressure

maintained?

Does inlet gas pressure drop more than 2"

WC

NO

Correct inlet gas pressure

Check operation

Replace Gas ValveCheck operation

YESDisconnect electrical

power to furnace. Connect manometer to oulet gas pressure

connector

NO

Cycle power to furnace and call

for heat

YES

DEFINITION

RETRY Lock Out = 3 unsuccessful tries for ignition within a single call for heatFlame has never been sensed

RECYCLE Lock Out = 10 recycles within a single call for heat. Flame is sensed & then lost

For CORRECT positioning of the igniter and flame sensor, see figure on next page

Disconnect electrical power to furnace.

Connect manometer to inlet gas pressure

connector

Is inlet gas pressure above 14" WC or less than

nameplate minimum ?

NO

Correct inlet gas pressure

Check operationYES

UD2-SF-1D 29

Service Facts

“H ot” Zone - not centered over crossover

INCORRECT positioning of ignitor.

HOT ZONE must be centered over the cross-over

Ignitor not overlapping burner (see above)

Correct positioning of ignitor and flame sensor.NOTE the slight over lap of the ignitor and the burner

Igniter slightly overlapping OD

of burner

30 UD2-SF-1D

Service Facts

NO

YES

YES

Is pressure greater than pressure switch label?See Note #2

Replace pressure switch. Check operation.

Is the inducer motor running?

Is 24 volts present, measured across PS1

(orange to yellow)?See Note #1

Replace IFC. Check operation.

Disconnect electrical power from the furnace and remove 1 wire from each pressure switch

Is continuity measured across

PS1 or PS2?

Replace pressure switch. Check operation.

YES

NO

Note #124 volts = Open Switch0 volts = Closed Switch

DEFINITIONAn error has occurred with the PS1 or PS2.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

Note #2Measured pressure is negative, greater than refers to magnitude only.

3 Flash Fault LED

NO

Replace Inducer. Check operation.

YES

While the furnace is operating on 1st

stage heat make a call for 2nd stage heat. Allow (30 seconds) for the furnace to transition to 2nd stage.

Is 24 volts present, measured across PS2 (orange 1 to brown)?

See Note #1

Is pressure greater than pressure switch label?See Note #2

NOReplace pressure switch.

Check operation.

Cycle power to the furnace and call for 1st

stage heat.

NO

YES

NO

Replace wiring harness. Check operation.

YES

NO

Reconnect electrical power to furnace. Cycle

power to furnace and call for 1st stage heat.

Does the furnace run on

1st stage?NOYES

Pressure switch is okay.

Check PS hose, flue piping for obstruction and/or

confirm vent size is correct

Check PS hose, flue piping for obstruction and/or

confirm vent size is correct

Pressure switch is okay.

Pressure switches are okay. Re attach

each wire to PS

Is 120 volts measured at IFC (Plug E4)

between pins 3 (RD/6) & 4 (WH/6)?

Is voltage measured at the inducer motor (3 pin connector)

between pins 2 (RD) and 3 (WH)?

Is 120 volts measured at IFC (Plug E4)

between pins 2 (BK/6) & 4 (WH/6)?

Replace IFC. Check operation.

NO

NO

Is voltage measured at the inducer motor (3 pin connector)

between pins 1 (BK) and 3 (WH)?

YES

Is the inducer motor running

on high speed?

YES

YES

Replace wiring harness. Check operation.

Replace Inducer. Check operation.

NO

YES

YES

NO

See IFC Component Layout for location of plug E4.

See IFC Component Layout for location of plug E4.

UD2-SF-1D 31

Service Facts


for heat

Ignition occurs and FAN ON delay

begins

Does fan come on after ~45 seconds?

Does blower wheel turn

freely?

Disconnect electrical power to

furnace

YES

Check set screw position and motor bearings. Correct

or replace as needed.

Check operation

NO

Is 120 VAC measured at 5

pin motor connector?

Terminals 4 & 5

YES

Is 120 VAC measured at IFC

between CIR-H and CIR-N?

NO

High voltage should always be present. Check wiring.

Repair wiring harness.Check operation

Are filter & blower wheel

clean?

YES

Replace filter and clean blower

wheel. Check operation

NO

Is external static pressure

greater than nameplate?

YES

Correct application or duct issues.

Check operation Is heat rise within

specification?See Service

Facts

NO

See ECM motor check out in Service Facts.

Is return air temperature above 85 F?

NO

Return air temperature is above max limit

YES

Check for loose insulation or other

objects within furnace air stream

NO

Is outlet manifold gas

pressure within specifications?

YES

Correct gas pressure

Check operation

NO

Is temperature at high limit above

the switch setting?

YES

Replace high limit switch

NO

YES

Is temperature at reverse flow

switch TCO-B above

specifications?

Replace reverse flow switch

NO

Check for excessive reverse flow during an off

cycle

YES

DEFINITIONLimit 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.

Make sure any temperature measuring devices

(thermocouples, dial thermometers) used to

estimate limit temperature are within ¼ inch of limit

measurement point

See next page for additional 4 flash

faults4 Flash Fault LED

NO YES

NO

Does motor continue to run

during the entire heating cycle?

YES

YES

NO

YES

Note:Furnace will need to be checked in both 1st & 2nd

stage operation.

Reverse Flow Switch Check out.

32 UD2-SF-1D

Service Facts


furnace

Remove, clean, and reassemble

burners. Push RED reset on both rollout

switches


for heat

Ignition occurs Do all burners ignite within 5

seconds?

Is LP gas being used?

NO

Is the burner orifice size 56? Or matched to Installers Guide for

LP?

YESInstall correct size

orificesCheck operation

NO

YES

Check burner alignment Correct as neededCheck operation

Check flue pipe for correct sizing and long horizontal runs or slope

less than ¼” per linear foot.Correct as needed

NO

Is flue piping restricted?

Correct as neededCheck operation

YES

Are flames from burners impinging on sides of heat

exchanger?

NO

YES

When fan comes on, do flames stay consistent?

Replace heat exchanger

Check operationNO

Replace Roll out switch

Check operation

YES

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.

YES

Are all burner flames directed into heat exchanger

with a tight pattern? (inadequately aired burners

tend to roll back)

NONO

Check combustion air blower, venting, heat

exchanger for blockage (i.e. sooting)

YES

4 Flash Fault LED

Is a Manual Reset, Flame Rollout Switch open?

YES

UD2-SF-1D 33

Service Facts

DEFINITION:

Flame is sensed when it should not be sensed.


furnace

Is there a drip leg installed on inlet gas piping per installation

instructions?

Using a back-up wrench, install new gas valve

Check operation

Inspect gas supply for leaks and have gas supplier check

gas quality

Are there signs of moisture or debris in the inlet gas screen?

YES

Install drip leg per National Fuel Gas

Code and Installation Instructions

YES

NO

NO

Turn off gas supply! Remove

gas valve

5 Flash Fault LED

34 UD2-SF-1D

Service Facts

DEFINITION:Ground Fault - Incoming or chassis ground connection is not sensed

Polarity Fault – Incoming high voltage wiring is reversed

Connect volt meter to white incoming neutral wire and

green earth ground

Does meter read ~120 vac?

Disconnect incoming electrical power to furnace

YESReverse 120 vac power leads to furnace wiring

Reconnect powerCheck operation

Connect volt meter to black incoming

and chassis ground at burner box

NO

Does meter read ~120 vac?


NOCorrect earth

ground.Check operation

Check / correct all ground

connections within furnace for continuity


YES

Check operation

Is there a voltage greater than 10 VAC

NO

Correct neutral and ground

problem. Furnace must be on a

dedicated circuit.

YES

NO

6 Flash Fault LED

UD2-SF-1D 35

Service Facts

DEFINITION: External Gas Valve Circuit Error (24 volts ispresent when it should not bepresent)

Is 24 VAC nominal voltage present between Red lead at gas

valve connection to chassis ground?

Turn Comfort Control to “OFF”

position

Correct wiring Check operation

YES

Replace IFC

NO

7 Flash Fault LED

36 UD2-SF-1D

Service Facts

DEFINITION:The flame sense current is less than 1 micro-amp DC


the furnace

Connect volt meter leads in series with

flame sensor

Meter must be set up for DC micro-amp

scale

Is flame current measured less than 1.0 micro-amp DC?


for heat

Replace flame sensor

Check operation

Is flame sensor located correctly?

See figure

YES

YES

Correct flame sensor location

NO

Flame sensor is good. Check wiring and / or connections.

NO

8 Flash Fault LED

Flame Sensor

UD2-SF-1D 37

Service Facts

Since the manufacturer has a policy of continuous product and product data improvement, it reserves theright to change design and specifications without notice.

Trane6200 Troup HighwayTyler, TX 75707www.trane.com

For more information contactyour local dealer (distributor)

VS No Air Flow / Incorrect Air Flow

NO

Is the ICM “fan” LED on?

YES

YES

Verify that dip-switch settings are correct for the system installed.

AND

Validate low-voltage wiring is configured for system installed.

Is 24 VAC measured between “G” and “B/C” at the

low voltage connections?

Check thermostat and wiring to thermostat.

Is line voltage measured at the motor per Figure 1?

NORepair line voltage

wiring.

YES

Perform “GO” / “NO GO” test per Figure 2.

Does the motor run?YES

Replace control board.

NO

Perform “GO” / “NO GO” test per Figure 3

Does the motor run?YES

Replace Wire harness

NO

Is 24 VAC measured between “R” (transformer

hot) and “B/C” (transformer common) at the low voltage

field connections?

NO

Replace transformer.

NO

Repair wiring between incoming power supply and

transformer.

Is fuse blown? YES Replace fuse.

NO

Is the proper line voltage present at the transformer?

YES

YES

Remove motor module and ohm motor windings

Are motor windings ok (See Note 1)?NO Replace motor

YESReplace motor

module

NO

NO

NOTE 1:1) Equal phase to phase resistance.2) No short to motor case.

Does system have proper air flow?

Check for dirty air filter, duct work damage or restrictions

around the air handler coil and repair as needed.

Done

NO

YES

NO

Is the fan wheel running?

YESDoes the CFM light flash rate match programmed

air flow?

Documents

*UD2-SF-1E Service Facts - Chapman Air and Heatchapmanair.com/images/pdf/furnaces/ud2-sf-1e.pdf · ud2-sf-1d 3 service facts safety section ! warning the cabinet must have an uninterrupted