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Service Facts
© 2010 Trane
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?Type RecommendedHi Vel. (No.-Size-Thk.)VENT — 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.)WEIGHTShipping (Lbs.) / Net (Lbs.)
Gas Furnace — Variable Speed — 2 Stage HeatModels: * - First letter may be “A” or “T”
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.
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 SERVICINGWARNING
*UD2B060A9V3VB*UD2B080A9V3VB*UD2C080A9V4VB*UD2C080B9V4VB*UD2B100A9V3VB
*UD2C100A9V5VB*UD2C100B9V5VB*UD2D120A9V5VB*UD2D120B9V5VB*UD2D140A9V5VB
*DD2B060A9V3VA*DD2B080A9V3VA*DD2C100A9V5VA*DD2D120A9V5VA
*UD2B060A9V3VBUpflow / 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
YesHigh Velocity
1 - 17x25 - 1in.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
136 / 126
*UD2B080A9V3VBUpflow / Horizontal
52,00041,60080,00064,00030 - 60Direct10 x 7
1Variable
See Airflow Table1/2
Variable115/1/60
CentrifugalDirect - 2
1/100 - 2543/1727115/1/600.70/0.40
YesHigh Velocity
1 - 17x25 - 1in.4 Round
Alum. Steel - Type 1
20
4 — 454 — 56
Redundant - Two Stage
Hot Surface IgnitionMulti-port In-shot
4115/1/60
10.5151/2
H x W x D41-3/4 x 19-1/2 x 30-1/2
142 / 132
*UD2C080A9V4VBUpflow / Horizontal
52,00041,60080,00064,00030 - 60Direct
10 x 101
VariableSee Airflow Table
3/4Variable115/1/60
CentrifugalDirect - 2
1/100 - 2543/1727115/1/600.70/0.40
YesHigh Velocity
1 - 20x25 - 1in.4 Round
Alum. Steel - Type 1
20
4 — 454 — 56
Redundant - Two Stage
Hot Surface IgnitionMulti-port In-shot
4115/1/60
12.9201/2
H x W x D41-3/4 x 23 x 30-1/2
166 / 155
UD2-9V-SF-1C
X340989P17
2 X340989P17
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?Type RecommendedHi Vel. (No.-Size-Thk.)
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.)
WEIGHTShipping (Lbs.) / Net (Lbs.)
*UD2C100A9V5VB
Upflow / Horizontal
65,00052,000100,00079,00035 - 65
Direct10 x 10
1Variable
See Airflow Table1
Variable115/1/60
CentrifugalDirect - 2
1/75 - 2708/1868115/1/600.87/0.49
YesHigh Velocity
1 - 20x25 - 1in.
4 Round
Alum. Steel - Type 1
20
5 — 455 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot5
115/1/6014.920
1/2
H x W x D41-3/4 x 23 x 30-1/2
166 / 155
*UD2B100A9V3VB
Upflow / Horizontal
65,00052,000100,00080,00040 - 70
Direct10 x 7
1Variable
See Airflow Table1/2
Variable115/1/60
CentrifugalDirect - 2
1/75 - 2708/1868115/1/600.87/0.49
YesHigh Velocity
1 - 17x25 - 1in.
4 Round
Alum. Steel - Type 1
20
5 — 455 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot5
115/1/6010.815
1/2
H x W x D41-3/4 x 19-1/2 x 30-1/2
142 / 1321 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.
*UD2C080B9V4VB
Upflow / Horizontal
52,00041,60080,00064,00030 - 60
Direct10 x 10
1Variable
See Airflow Table3/4
Variable115/1/60
CentrifugalDirect - 2
1/100 - 2543/1727115/1/600.70/0.40
YesHigh Velocity
1 - 20x25 - 1in.
4 Round
Alum. Steel - Type 1
20
4 — 454 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot4
115/1/6012.920
1/2
H x W x D41-3/4 x 23 x 30-1/2
166 / 155
X340989P17 3
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?Type RecommendedHi Vel. (No.-Size-Thk.)
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.)
WEIGHTShipping (Lbs.) / Net (Lbs.)
*UD2C100B9V5VB
Upflow / Horizontal
65,00052,000100,00079,00035 - 65
Direct10 x 10
1Variable
See Airflow Table1
Variable115/1/60
CentrifugalDirect - 2
1/75 - 2708/1868115/1/600.87/0.49
YesHigh Velocity
1 - 20x25 - 1in.
4 Round
Alum. Steel - Type 1
20
5 — 455 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot5
115/1/6014.920
1/2
H x W x D41-3/4 x 23 x 30-1/2
166 / 155
*UD2D120A9V5VB
Upflow / Horizontal
78,00062,400120,00097,00035 - 65
Direct10 x 10
1Variable
See Airflow Table1
Variable115/1/60
CentrifugalDirect - 2
1/60 - 3090/2225115/1/601.14/0.51
YesHigh Velocity
1 - 24x25 - 1in.
4 Round
Alum. Steel - Type 1
20
6 — 456 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot6
115/1/6015.320
1/2
H x W x D41-3/4 x 26-1/2 x 30-1/2
193 / 181
*UD2D120B9V5VB
Upflow / Horizontal
78,00062,400120,00097,00035 - 65
Direct10 x 10
1Variable
See Airflow Table1
Variable115/1/60
CentrifugalDirect - 2
1/60 - 3090/2225115/1/601.14/0.51
YesHigh Velocity
1 - 24x25 - 1in.
4 Round
Alum. Steel - Type 1
20
6 — 456 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot6
115/1/6015.320
1/2
H x W x D41-3/4 x 26-1/2 x 30-1/2
193 / 181
*UD2D140A9V5VB
Upflow / Horizontal
91,00072,800140,000111,00040 - 70
Direct10 x 10
1Variable
See Airflow Table1
Variable115/1/60
CentrifugalDirect - 2
1/60 - 3100/2350115/1/601.16/0.54
YesHigh Velocity
1 - 24x25 - 1in.
4 Round
Alum. Steel - Type 1
20
7 — 457 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot7
115/1/6015.320
1/2
H x W x D41-3/4 x 26-1/2 x 30-1/2
197 / 185
4 X340989P17
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?Type RecommendedHi Vel. (No.-Size-Thk.)
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.)
WEIGHTShipping (Lbs.) / Net (Lbs.)
*DD2B060A9V3VA
Downflow / Horizontal
39,00031,20060,00048,00035 - 65
Direct10 x 7
1Variable
See Airflow Table1/2
Variable115/1/60
CentrifugalDirect - 2
1/100 - 2543/1727115/1/600.70/0.40
YesHigh Velocity
2 - 14x20 - 1in.
4 Round
Alum. Steel - Type 1
20
3 — 453 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot3
115/1/6010.515
1/2
H x W x D41-3/4 x 19-1/2 x 30-1/2
140 / 129
*DD2B080A9V3VA
Downflow / Horizontal
52,00041,60080,00063,00035 - 65
Direct10 x 7
1Variable
See Airflow Table1/2
Variable115/1/60
CentrifugalDirect - 2
1/100 - 2543/1727115/1/600.70/0.40
YesHigh Velocity
2 - 14x20 - 1in.
4 Round
Alum. Steel - Type 1
20
4 — 454 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot4
115/1/6010.515
1/2
H x W x D41-3/4 x 19-1/2 x 30-1/2
146 / 135
*DD2C100A9V5VA
Downflow / Horizontal
65,00052,000100,00081,00035 - 65
Direct11 x 10
1Variable
See Airflow Table1
Variable115/1/60
CentrifugalDirect - 2
1/75 - 2708/1868115/1/600.87/0.49
YesHigh Velocity
2 - 16x20 - 1in.
4 Round
Alum. Steel - Type 1
20
5 — 455 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot5
115/1/6014.920
1/2
H x W x D41-3/4 x 23 x 30-1/2
166 / 155
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.
DD2D120A9V5VA
Downflow / Horizontal
78,00062,400120,00095,00035 - 65
Direct11 x 10
1Variable
See Airflow Table1
Variable115/1/60
CentrifugalDirect - 2
1/60 - 3090/2225115/1/601.14/0.51
YesHigh Velocity
2 - 16x20 - 1in.
4 Round
Alum. Steel - Type 1
20
6 — 456 — 56
Redundant - Two Stage
Hot Surface Ignition
Multi-port In-shot6
115/1/6015.320
1/2
H x W x D41-3/4 x 26-1/2 x 30-1/2
197 / 185
X340989P17 5
Service FactsSafety Section
▲ WARNING!The cabinet must have an uninterrupted or unbroken ground according to National Electrical Code, ANSI/NFPA 70 - “latest edition” and Canadian Electrical Code, CSA C22.1 or local codes to minimize personal injury if an electrical fault should occur. A failure to follow this warn-ing 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!CARBON MONOXIDE POISONING HAZARD
Failure to follow the installation instructions for the vent-ing system being placed into operation could result in carbon monoxide poisoning or death.
▲ WARNING!FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in serious injury, death or property damage.
Never test for gas leaks with an open flame. Use a com-mercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property damage, personal injury, or loss of life.
▲ WARNING!FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in serious injury, death or property damage.
Improper servicing could result in dangerous operation, serious injury, death, or property damage.
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 POLARITY SENSITIVE. THE HOT LEG OF THE 115 VAC POWER MUST BE CONNECTED TO THE BLACK FIELD LEAD.
6 X340989P17
Service FactsSequence Of OperationThermostat call for heat (2-stage thermostat)Call for 1st stage only: R and W1 thermostat contacts close signaling the control module to run its self-check routine. After the control mod-ule has verified that the 1st stage pressure switch contacts are open and the limit switch(es) contacts are closed, the draft blower will be energized.
As the induced draft blower comes up to speed, the pres-sure switch contacts will close and the ignitor warm up period will begin. The igniter will heat for approx. 17 seconds, then the gas valve is energized in 1st stage to permit gas flow to the burners. The flame sensor confirms that ignition has been achieved 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. 45 seconds the indoor blower motor will be energized at low speed and will continue to run during the heating cycle.
Call for 2nd stage after 1st stage: R and W2 thermostat contacts close signaling a call for 2nd stage heat. After a 30 second delay, the induced draft blower will be energized on high speed and the 2nd stage pressure switch contacts will close allowing the gas valve to be energized 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 stage heating requirements are satisfied. The induced draft blower is reduced to low speed allowing the 2nd stage pressure switch contacts to open and the gas valve is reduced to 1st stage. After approx. 30 seconds the indoor blower motor is reduced to low speed.
1st stage satisfied: R and W1 thermostat contacts open signaling that 1st stage heating requirements are satisfied. The gas valve will close and the induced draft blower will be de-energized. The indoor blower motor will continue to run for the heating fan off period (Field selectable at 90, 120, 150 or 180 seconds), then will be de-energized by the control module.
Thermostat call for heat (1-stage Thermostat)R and W thermostats close signaling a call for heat. 1st stage sequence of operation remains the same as above. 2nd stage delay will be reflective dip switch S7-1 and S7-2.
Reference the back of service facts for delay options.
Thermostat satisfied (1-stage Thermostat): Contacts open signaling the control module to close the gas valve and de-energize the induced draft blower. The indoor blower motor will continue to operate at high heat speed for approx. 30 seconds after the flames are extinguished and then is switched to low heat speed for the remaining FAN-OFF period.
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!
Indoor Blower TimingHeating: The ECM Fan Control controls the variable speed indoor blower. The blower “on” time is fixed at 45 seconds after ignition. The FAN-OFF period is field selectable by dip switches S7-3 and S7-4 on the Integrated Furnace Con-trol at 90, 120, 150, or 180 seconds. The factory setting is 90 seconds (See unit wiring diagram).
Cooling: The fan delay-off period is set by dip switches on the ECM Fan Control board connected to the Integrated Furnace Control. The options for cooling delay off is field selectable by dip switches S4-1 and S4-2.
The following table and graph explain the delay-off set-tings:
COOLING OFF - DELAY OPTIONS
SWITCH SETTINGS SELECTION NOMINALAIRFLOW
S4-1 - OFF S4-2 - OFF NONE SAME
S4-1 - ON S4-2 - OFF 1.5 MINUTES 100% *
S4-1 - OFF S4-2 - ON 3 MINUTES 50%
S4-1 - ON S4-2 - ON ** 50 - 100%
* - This setting is equivalent to BAY24X045 relay benefit
** - This selection provides ENHANCED MODE, which is a ramping up and ramping down of the blower speed to provide improved comfort, quietness, and potential energy savings. See Wiring Diagram notes on the unit or in the Ser-vice Facts for complete wiring setup for ENHANCED MODE. The graph which follows, shows the ramping process.
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 POLARITY SENSITIVE. THE HOT LEG OF THE 115 VAC POWER MUST BE CONNECTED TO THE BLACK FIELD LEAD.
OFF
50%50%
80%
Dehumidify
EfficiencyFast Coil Cooling
1
minute
3
minutes
7.5
minutes
100% if necessary
OFF
X340989P17 7
Service FactsPeriodic Servicing Requirements
▲ WARNING!Disconnect power to the unit before removing the blower door. Failure to follow this warning could result in person-al injury from moving parts.
1. 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 furnace.
2. FILTERS – 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.
4. IGNITER – This unit has a special hot surface direct ignition device that automatically lights the burners. Please note that it is very fragile and should be han-dled with care.
▲ CAUTION!Do not touch igniter. It is extremely hot.
5. BURNER – 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 must be cleaned annually using brushes and vacuum cleaner.
Turn off gas and electric power supply. To clean burn-ers, remove burner box cover (6 to 8 screws) and 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. Re-assemble parts by reversal of the above procedure. The burner box must be resealed when replacing box cover.
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 must be cleaned an-nually using brushes and vacuum cleaner.
NOTE: On LP (propane) units, due to variations in BTU content and altitude, servicing may be required at shorter inter-vals.
▲ 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.
6. HEAT EXCHANGER/FLUE PIPE – These items must be inspected for signs of corrosion, and/or deteriora-tion at the beginning of each heating season by a quali-fied service technician and cleaned annually for best operation. To clean flue gas passages, follow recommen-dations 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. Inspect around insulation covering flue collector box. Inspect induced draft blower connections from recuperative cell and to the flue pipe connection.
e. Remove burners. (See 4.)
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 burner box cover, burners, and furnace door.
i. Restore gas supply. Check for leaks using a soap solution. Restore electrical supply. Check unit for normal operation.
7. 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.
▲ WARNING!NEVER USE AN OPEN FLAME TO TEST FOR GAS LEAKS. AN EXPLOSION COULD OCCUR, CAUSING INJURY OR DEATH.
8 X340989P17
Service FactsWiring Diagram
(continued on next page)
Electrical Data
From Dwg. D344249P02
X340989P17 9
Service FactsSchematic Diagram
From Dwg. D344249P02
10 X340989P17
Service Facts
(continued on next page)
Wiring Diagram
From Dwg. D344248P02
X340989P17 11
Service FactsSchematic Diagram
From Dwg. D344248P02
12 X340989P17
Service FactsPerformance Data
*UD2B060A9V3VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOOR UNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
1.5
LOW(350 CFM/ TON) ON ON OFF ON CFM
WATTS49950
53780
520110
520145
500175
NORMAL(400 CFM/ TON) ON ON OFF OFF CFM
WATTS60560
61080
610120
597155
593180
HIGH(450 CFM/ TON) ON ON ON OFF CFM
WATTS64975
681110
665145
665180
672220
2.0
LOW(350 CFM/ TON) OFF ON OFF ON CFM
WATTS68080
722125
680150
696190
696225
NORMAL(400 CFM/ TON) OFF ON OFF OFF CFM
WATTS798105
804145
809170
823235
818280
HIGH(450 CFM/ TON) OFF ON ON OFF CFM
WATTS884145
896180
924240
931280
931330
2.5
LOW(350 CFM/ TON) ON OFF OFF ON CFM
WATTS858125
863175
882220
894275
895320
NORMAL(400 CFM/ TON) ON OFF OFF OFF CFM
WATTS984170
1017225
1038295
1017330
1017375
HIGH(450 CFM/ TON) ON OFF ON OFF CFM
WATTS1125245
1138315
1150370
1161435
1161475
3.0 **
LOW(350 CFM/ TON) OFF OFF OFF ON CFM
WATTS1035205
1056265
1076330
1076370
1076430
NORMAL **(400 CFM/ TON) OFF OFF OFF OFF CFM
WATTS1208300
1247360
1268440
1278485
1200490
HIGH(450 CFM/ TON) OFF OFF ON OFF CFM
WATTS1380440
1410500
1402550
1350550
1235525
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. 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.
*UD2B060A9V3VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
5894965
6044895
61947125
60448160
60748200
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
6634475
69442120
68442145
68142185
68642220
HIGH OFF OFFCFM
TEMP. RISEWATTS
77537105
78137145
77637180
80536230
81136270
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
81355110
81854150
81854185
83753240
84253280
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
90749140
91948200
94247240
95846300
95946330
HIGH OFF OFFCFM
TEMP. RISEWATTS
103843190
106642260
108641325
108941365
107941415
X340989P17 13
Service Facts
*UD2B080A9V3VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
2.5
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS880120
875155
860190
845225
840245
NORMAL (400 CFM/TON) OFF ON OFF OFF CFM
WATTS1020170
1000205
990240
980280
960320
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1110210
110260
1110320
1100350
1100385
3.0
LOW(350 CFM/TON) ON OFF OFF ON CFM
WATTS1040190
1010220
1000260
1000310
990340
NORMAL (400 CFM/TON) ON OFF OFF OFF CFM
WATTS1200250
1200320
1190370
1190415
1175450
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1340355
1340425
1330475
1320530
1300570
3.5 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1215265
1210330
1210375
1200430
1185465
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS1430415
1415457
1410520
1385575
1330580
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS1430415
1415475
1410520
1385575
1330580
NOTES:1. * First Letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
*UD2B080A9V3VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
80048100
79049135
76550155
75052200
73053230
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
91043130
89044170
87544210
86045240
82047280
HIGH OFF OFFCFM
TEMP. RISEWATTS
106037188
102038220
101039265
101039310
100039350
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
111054210
109055260
109055310
108055350
106556400
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
124548300
124048355
124048410
123048460
121549500
HIGH OFF OFFCFM
TEMP. RISEWATTS
141542410
140042470
140042530
137543580
132045590
14 X340989P17
Service Facts*UD2C080A9V4VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
7824975
76251110
75151145
74851185
73752225
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
8704490
86545125
86145175
84845215
83146255
HIGH OFF OFFCFM
TEMP. RISEWATTS
96240110
97440155
96340200
93841245
91442290
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
109154145
109254190
108755245
109254305
107755355
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
121149190
124348255
124348310
124448370
123548430
HIGH OFF OFFCFM
TEMP. RISEWATTS
137143255
138843325
139243395
138543455
137743515
*UD2C080A9V4VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
2.5
LOW(350 CFM/TON) ON ON OFF ON CFM
WATTS86390
865130
858175
843220
831255
NORMAL (400 CFM/TON) ON ON OFF OFF CFM
WATTS995115
1005170
989210
973260
956305
HIGH(450 CFM/TON) ON ON ON OFF CFM
WATTS1101150
1112200
1111255
1107305
1101360
3.0
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS1031125
1031175
1026215
1013270
1003320
NORMAL (400 CFM/TON) OFF ON OFF OFF CFM
WATTS1163170
1178230
1188285
1183345
1178405
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1319240
1337305
1344365
1340420
1336485
3.5 LOW
(350 CFM/TON) ON OFF OFF ON CFMWATTS
1182200
1206240
1211295
1211350
1211420
NORMAL(400 CFM/TON) ON OFF OFF OFF CFM
WATTS1380255
1401325
1402390
1402460
1399515
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1553350
1566425
1557500
1558560
1559645
4.0 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1386255
1401330
1408395
1402460
1390520
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS1590360
1593440
1591515
1588575
1576650
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS1791360
1808615
1810615
1808775
1726800
NOTES:1. * First Letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
X340989P17 15
Service Facts*UD2C080B9V4VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
97449133
96849285
94950202
92551254
90652304
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
11024393
111243144
110343201
108344255
106645305
HIGH OFF OFFCFM
TEMP. RISEWATTS
119440119
121739180
121539243
120040304
118240362
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
118958142
121057209
120957276
119358341
117558404
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
134651141
138849207
139849274
139049339
137250401
HIGH OFF OFFCFM
TEMP. RISEWATTS
146047186
151645263
153645335
153345407
151545477
*UD2C080B9V4VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
2.5
LOW(350 CFM/TON) ON ON OFF ON CFM
WATTS84271
819114
789163
756207
740249
NORMAL (400 CFM/TON) ON ON OFF OFF CFM
WATTS95690
948140
928196
901248
884298
HIGH(450 CFM/TON) ON ON ON OFF CFM
WATTS1071113
1078171
1067233
1045292
1028348
3.0
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS100299
1000152
983210
958265
942318
NORMAL (400 CFM/TON) OFF ON OFF OFF CFM
WATTS1140128
1155191
1150256
1132319
1114379
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1278165
1311238
1316308
1305377
1287444
3.5 LOW
(350 CFM/TON) ON OFF OFF ON CFMWATTS
1163134
1181199
1177265
1161328
1143389
NORMAL(400 CFM/TON) ON OFF OFF OFF CFM
WATTS1324179
1363255
1372326
1363397
1345466
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1485234
1544319
1566396
1565472
1546550
4.0 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1324179
1363255
1372326
1363397
1345466
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS1508243
1570329
1594407
1593483
1575562
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS1691322
1777416
1816499
1824579
1805669
NOTES:1. * First Letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
16 X340989P17
Service Facts*UD2B100A9V3VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
7516486
79661132
81759175
83258218
83857263
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
86256121
92152185
95351233
96750285
95450322
HIGH OFF OFFCFM
TEMP. RISEWATTS
95950148
100248210
103646280
103646325
100348355
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
109967227
112466287
114964355
115764415
105570395
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
128658365
132156450
131356455
121561475
111966450
HIGH OFF OFFCFM
TEMP. RISEWATTS
139953465
141952570
134755545
126559520
116364485
*UD2B100A9V3VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
1.5
LOW(350 CFM/TON) ON ON OFF ON CFM
WATTS51650
53675
551105
547135
530165
NORMAL(400 CFM/TON) ON ON OFF OFF CFM
WATTS58359
61592
633127
621157
61818
HIGH(450 CFM/TON) ON ON ON OFF CFM
WATTS68170
697110
701140
709180
712215
2.0
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS68075
726120
735150
741190
745230
NORMAL(400 CFM/TON) OFF ON OFF OFF CFM
WATTS769103
819145
843190
858235
865286
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS882130
938190
961245
975300
970345
2.5
LOW(350 CFM/TON) ON OFF OFF ON CFM
WATTS831180
903180
928230
935275
935320
NORMAL(400 CFM/TON) ON OFF OFF OFF CFM
WATTS979167
1036240
1053295
1053345
1015368
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1121245
1147310
1176383
1167442
1055396
3.0**
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1061210
1081265
1095320
1101382
1032380
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS1185278
1223364
1251435
1205455
1101426
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS1351425
1372503
1343535
1248505
1168480
NOTES:1. * First Letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
X340989P17 17
Service Facts*UD2C100A9V5VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
90053100
89054130
87055175
85057220
83558270
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
112543150
109044200
106046235
107045300
107045340
HIGH OFF OFFCFM
TEMP. RISEWATTS
130037220
130037290
132036365
135036430
134036490
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
127059200
129058260
129058335
129058400
128058460
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
157547355
160046445
161046520
160046575
158047650
HIGH OFF OFFCFM
TEMP. RISEWATTS
187040560
189039665
186040710
187040830
173043760
*UD2C100A9V5VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
3.0
LOW(350 CFM/TON) ON ON OFF ON CFM
WATTS1075135
1055185
1015220
1000265
990325
NORMAL(400 CFM/TON) ON ON OFF OFF CFM
WATTS1220185
1200240
1210295
1210350
1210410
HIGH(450 CFM/TON) ON ON ON OFF CFM
WATTS1390245
1390320
1410391
1410470
1400510
3.5
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS1214185
1210240
1215295
1210350
1210415
NORMAL(400 CFM/TON) OFF ON OFF OFF CFM
WATTS1430310
1460355
1470430
1460500
1440555
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1640370
1665460
1650540
1640615
1610660
4.0
LOW(350 CFM/TON) ON OFF OFF ON CFM
WATTS1405270
1430310
1440375
1440480
1420550
NORMAL(400 CFM/TON) ON OFF OFF OFF CFM
WATTS1670395
1675490
1670550
1655630
1630700
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1870540
1880635
1880730
1845800
1670640
5.0 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1775480
1800580
1820680
1800750
1680740
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS2065755
2020840
1945900
1805880
1623800
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS23101000
21001000
2100950
1965890
1800825
NOTES:1. * First letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
18 X340989P17
Service Facts*UD2C100B9V5VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
9535093
94450146
93651193
90852243
88754292
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
114242135
114142200
113542255
111243322
109843377
HIGH OFF OFFCFM
TEMP. RISEWATTS
125838169
126038240
125638302
123638378
122739437
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
131252188
131752261
131452326
129453406
128753468
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
157744301
159243387
159243468
159743563
158243644
HIGH OFF OFFCFM
TEMP. RISEWATTS
173939392
176139486
176239575
175339675
176239774
*UD2C100B9V5VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
3.0
LOW(350 CFM/TON) ON ON OFF ON CFM
WATTS1056114
1050173
1044225
1019284
1002336
NORMAL(400 CFM/TON) ON ON OFF OFF CFM
WATTS1199151
1199219
1194277
1172349
1161405
HIGH(450 CFM/TON) ON ON ON OFF CFM
WATTS1342198
1348273
1345340
1326422
1320486
3.5
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS1223158
1224227
1219287
1198361
1187418
NORMAL(400 CFM/TON) OFF ON OFF OFF CFM
WATTS1389217
1397294
1395363
1377449
1373515
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1556291
1570376
1570455
1556549
1559629
4.0
LOW(350 CFM/TON) ON OFF OFF ON CFM
WATTS1389217
1397294
1395363
1377449
1373515
NORMAL(400 CFM/TON) ON OFF OFF OFF CFM
WATTS1580303
1595389
1595469
1582565
1585647
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1770411
1793507
1795598
1787698
1797801
5.0 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1723382
1744475
1754564
1735663
1744760
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS1961546
1991652
1996751
1991850
2010981
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS2199754
2217875
2217983
21971067
1987943
NOTES:1. * First letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
X340989P17 19
Service Facts*UD2D120A9V5VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
100757114
106254177
108453285
106354303
106354350
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
115450167
121148230
121148277
122147344
121248417
HIGH OFF OFFCFM
TEMP. RISEWATTS
128845208
131944273
131044330
134943410
135843460
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
138764250
142163320
145561400
148860460
149559540
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
158956350
163754440
166653535
167853600
154158575
HIGH OFF OFFCFM
TEMP. RISEWATTS
177150475
178850560
180449650
175151675
155457590
*UD2D120A9V5VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOOR UNIT SIZE
(TONS)
AIRFLOWSETTING
(See Notes)
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
3.5
LOW(350 CFM/ TON) OFF ON OFF ON CFM
WATTS1195150
1243225
1235275
1251325
1251410
NORMAL(400 CFM/ TON) OFF ON OFF OFF CFM
WATTS1353210
1403290
1417370
1437425
1458485
HIGH(450 CFM/ TON) OFF ON ON OFF CFM
WATTS1554315
1572410
1615480
1634570
1567575
4.0
LOW(350 CFM/ TON) ON OFF OFF ON CFM
WATTS1356200
1391280
1399370
1433420
1454510
NORMAL(400 CFM/ TON) ON OFF OFF OFF CFM
WATTS1565320
1584410
1633475
1639560
1554575
HIGH(450 CFM/ TON) ON OFF ON OFF CFM
WATTS1766450
1799550
1810650
1784685
1590600
5.0 **
LOW(350 CFM/ TON) OFF OFF OFF ON CFM
WATTS1708420
1758530
1759585
1775675
1575585
NORMAL **(400 CFM/ TON) OFF OFF OFF OFF CFM
WATTS1994665
2018775
1971785
1814725
1618625
HIGH(450 CFM/ TON) OFF OFF ON OFF CFM
WATTS2247975
2152925
2019860
1861765
1693680
NOTES: "CONTINUOUS FAN SETTING" IS THERMOSTAT FAN SWITCH "ON" AND DIP SWITCHS 5 AND 6 "ON".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. 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.
20 X340989P17
Service Facts*UD2D120B9V5VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
10504599
104446146
103546208
100547252
98048310
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
121439129
121639188
121739262
119240252
116941310
HIGH OFF OFFCFM
TEMP. RISEWATTS
128837147
129337212
129837293
127537309
125438373
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
142948191
144048267
145347363
143548340
141648406
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
167241310
169540402
172240528
171140409
169740480
HIGH OFF OFFCFM
TEMP. RISEWATTS
178239385
180938480
189036623
183537565
187137644
*UD2D120B9V5VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOOR UNIT SIZE
(TONS)
AIRFLOWSETTING
(See Notes)
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
3.5
LOW(350 CFM/ TON) OFF ON OFF ON CFM
WATTS1208128
1209186
1210260
1185306
1162370
NORMAL(400 CFM/ TON) OFF ON OFF OFF CFM
WATTS1343162
1350232
1358318
1337365
1317433
HIGH(450 CFM/ TON) OFF ON ON OFF CFM
WATTS1477210
1491290
1507391
1490436
1472508
4.0
LOW(350 CFM/ TON) ON OFF OFF ON CFM
WATTS1343162
1350232
1358318
1337365
1317433
NORMAL(400 CFM/ TON) ON OFF OFF OFF CFM
WATTS1496218
1511300
1528403
1511447
1494520
HIGH(450 CFM/ TON) ON OFF ON OFF CFM
WATTS1650296
1671387
1698511
1686548
1671626
5.0 **
LOW(350 CFM/ TON) OFF OFF OFF ON CFM
WATTS1612274
1631363
1655482
1642521
1627598
NORMAL **(400 CFM/ TON) OFF OFF OFF OFF CFM
WATTS1858403
1902533
1907624
1906714
1871755
HIGH(450 CFM/ TON) OFF OFF ON OFF CFM
WATTS1871585
2126711
2110797
2098888
2001953
NOTES: "CONTINUOUS FAN SETTING" IS THERMOSTAT FAN SWITCH "ON" AND DIP SWITCHS 5 AND 6 "ON".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. 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.
X340989P17 21
Service Facts*UD2D140A9V5VB FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
109062130
110061175
107063215
108062255
106063290
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
123055180
126553235
128053315
130052380
130052455
HIGH OFF OFFCFM
TEMP. RISEWATTS
138049235
140548290
142547375
143047415
145047520
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
154567320
155067385
156067475
156067540
157566605
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
176059435
179058545
181058620
180058695
172560725
HIGH OFF OFFCFM
TEMP. RISEWATTS
200052615
201052715
200052790
195054820
180058775
*UD2D140A9V5VB FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
3.5
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS1175165
1165200
1180265
1170320
1150400
NORMAL(400 CFM/TON) OFF ON OFF OFF CFM
WATTS1345225
1370285
1400360
1405440
1380490
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1525295
1565390
1585470
1575515
1530585
4.0
LOW(350 CFM/TON) ON OFF OFF ON CFM
WATTS1320220
1330275
1335355
1300435
1240490
NORMAL(400 CFM/TON) ON OFF OFF OFF CFM
WATTS1550310
1580400
1590475
1555540
1460610
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1735430
1735510
1710600
1670675
1590710
5.0 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1700415
1725470
1730560
1725640
1690700
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS1980616
1980710
1950770
1885780
1735735
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS2190835
2150870
2075890
1905800
1735735
NOTES:1. * First Letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
22 X340989P17
Service Facts
*DD2B060A9V3VA FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOOR UNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
1.5
LOW(350 CFM/ TON) ON ON OFF ON CFM
WATTS53345
56375
546100
534130
515160
NORMAL(400 CFM/ TON) ON ON OFF OFF CFM
WATTS60955
62790
624115
606150
607180
HIGH(450 CFM/ TON) ON ON ON OFF
CFM
WATTS66465
68395
690135
687165
680200
2.0
LOW(350 CFM/ TON) OFF ON OFF ON CFM
WATTS69365
714105
708135
706170
712210
NORMAL(400 CFM/ TON) OFF ON OFF OFF CFM
WATTS78085
821130
813165
810205
816245
HIGH(450 CFM/ TON) OFF ON ON OFF CFM
WATTS886110
896150
901200
925250
930285
2.5
LOW(350 CFM/ TON) ON OFF OFF ON CFM
WATTS865105
882145
869185
884275
885265
NORMAL(400 CFM/ TON) ON OFF OFF OFF CFM
WATTS977135
983180
1014235
1035290
1019330
HIGH(450 CFM/ TON) ON OFF ON OFF CFM
WATTS1097170
1125235
1155305
1169350
1169405
3.0 **
LOW(350 CFM/ TON) OFF OFF OFF ON CFM
WATTS1006145
1034200
1056255
1072315
1067352
NORMAL **(400 CFM/ TON) OFF OFF OFF OFF CFM
WATTS1169215
1202265
1226355
1221390
1217440
HIGH(450 CFM/ TON) OFF OFF ON OFF CFM
WATTS1313290
1339370
1360425
1369500
1357525
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. 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.
*DD2B060A9V3VA FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW
ON
ON
CFMTEMP. RISE
WATTS
5475348
5934980
57151107
56751143
54453170
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
6584465
6644492
65844122
65844155
65244197
HIGH
OFF OFF
CFMTEMP. RISE
WATTS
7353975
76138120
76138155
76438190
76238230
HEATING2ND
STAGE
LOW ON ON
CFMTEMP. RISE
WATTS
7436075
77757120
77557155
78357195
77258230
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
87451105
88750150
88150185
89450230
89450270
HIGH OFF OFF
CFMTEMP. RISE
WATTS
99645143
101344192
104143250
105842307
106942337
X340989P17 23
Service Facts
*DD2B080A9V3VA FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
2.5
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS840105
830135
830160
815220
750225
NORMAL (400 CFM/TON) OFF ON OFF OFF CFM
WATTS970140
950170
940210
925245
900270
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1085185
1060220
1045260
1015300
1000325
3.0
LOW(350 CFM/TON) ON OFF OFF ON CFM
WATTS1015155
995190
990230
970260
920285
NORMAL (400 CFM/TON) ON OFF OFF OFF CFM
WATTS1150215
1140250
1120305
1100335
1085370
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1290300
1290340
1270390
1260425
1235475
3.5 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1160220
1150265
1140320
1115345
1100385
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS1355330
1340380
1330425
1320470
1280510
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS1360330
1360380
1315425
1320470
1280510
NOTES:1. * First letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
*DD2B080A9V3VA FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
7755085
75051110
70055140
68556170
68057185
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
86545110
84046140
82047175
79548210
77050235
HIGH OFF OFFCFM
TEMP. RISEWATTS
101038160
98039190
97040230
94041260
91542285
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
108055180
106056220
103557255
101059285
99560325
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
119050245
119050290
117051330
115551370
114052410
HIGH OFF OFFCFM
TEMP. RISEWATTS
134544330
133544380
132045425
131045475
127546505
24 X340989P17
Service Facts
*DD2C100A9V5VA FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOORUNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
3.0
LOW(350 CFM/TON) ON ON OFF ON CFM
WATTS1025125
1050165
1035195
1030250
1005285
NORMAL(400 CFM/TON) ON ON OFF OFF CFM
WATTS1185165
1180210
1180250
1190315
1190365
HIGH(450 CFM/TON) ON ON ON OFF CFM
WATTS1300200
1345280
1355325
1375405
1370450
3.5
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS1195165
1185215
1200270
1200320
1190370
NORMAL(400 CFM/TON) OFF ON OFF OFF CFM
WATTS1360230
1390315
1425380
1420430
1420495
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1560320
1595425
1595460
1595540
1570585
4.0
LOW(350 CFM/TON) ON OFF OFF ON CFM
WATTS1350235
1385300
1410375
1420425
1410495
NORMAL(400 CFM/TON) ON OFF OFF OFF CFM
WATTS1575340
1615420
1625495
1610545
1585595
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1800480
1795555
1790620
1760670
1690675
5.0 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1745440
1760515
1755595
1735640
1670660
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS2010630
2000700
1940745
1865740
1760725
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS2205830
2130835
2015800
1890760
1740720
NOTES:1. * First letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
*DD2C100A9V5VA FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
8905487
87055120
85556160
85057200
82558250
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
110044135
109044175
108045225
107045260
107045320
HIGH OFF OFFCFM
TEMP. RISEWATTS
127038195
129037260
129537315
130037365
130037425
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
123060180
122061220
125059290
125559345
127558410
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
152049295
155048385
156047460
155548525
153048565
HIGH OFF OFFCFM
TEMP. RISEWATTS
182041475
182541570
182541625
180041685
174043695
X340989P17 25
Service Facts
DD2D120A9V5VA FURNACE COOLING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
OUTDOOR UNIT SIZE
(TONS)
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S3-1 S3-2 S3-3 S3-4 0.1 0.3 0.5 0.7 0.9
3.5
LOW(350 CFM/TON) OFF ON OFF ON CFM
WATTS1200150
1200185
1185235
1210290
1210350
NORMAL(400 CFM/TON) OFF ON OFF OFF CFM
WATTS1355190
1400265
1420335
1445385
1445440
HIGH(450 CFM/TON) OFF ON ON OFF CFM
WATTS1535255
1580345
1600415
1620490
1600530
4.0
LOW(350 CFM/TON) ON OFF OFF ON CFM
WATTS1350190
1370250
1400320
1415385
1420445
NORMAL(400 CFM/TON) ON OFF OFF OFF CFM
WATTS1570275
1600350
1630425
1640500
1630560
HIGH(450 CFM/TON) ON OFF ON OFF CFM
WATTS1800400
1800450
1815540
1820610
1810670
5.0 **
LOW(350 CFM/TON) OFF OFF OFF ON CFM
WATTS1725350
1750440
1770500
1790580
1775650
NORMAL **(400 CFM/TON) OFF OFF OFF OFF CFM
WATTS1970515
2015615
2035700
2010775
1960800
HIGH(450 CFM/TON) OFF OFF ON OFF CFM
WATTS2260730
2250830
2215885
2100860
1975810
NOTES:1. * First Letter may be "A" or "T"2. ** Factory setting3. Continuous Fan Setting: Heating or Cooling airflow is approximately 50% of selected Cooling value.4. 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
DD2D120A9V5VA FURNACE HEATING AIRFLOW (CFM) AND POWER (WATTS) VS. EXTERNAL STATIC PRESSURE WITH FILTER
AIRFLOWSETTING
DIP SWITCH SETTING EXTERNAL STATIC PRESSURE
S4-3 S4-4 0.1 0.3 0.5 0.7 0.9
HEATING1ST
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
9706085
99058140
98059180
95561210
93062255
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
112052120
114051170
111552215
112052270
112052315
HIGH OFF OFFCFM
TEMP. RISEWATTS
124047150
124047210
124047250
124047300
124047360
HEATING2ND
STAGE
LOW ON ONCFM
TEMP. RISEWATTS
136065190
138064250
140063315
142562400
143062430
MEDIUM ** ON OFFCFM
TEMP. RISEWATTS
157057275
162055370
164054440
165054480
163554560
HIGH OFF OFFCFM
TEMP. RISEWATTS
172052360
173551425
176051515
176051585
176051650
26 X340989P17
Service Facts
▲ 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.
GREEN LED AMBER LED RED LED ERRORFLASH FLASH FLASH
1 Flame Sensed when no flame should be present2 Pressure switch stuck closed3 1st stage pressure switch is open / not closing4 Open thermal limit or open rollout5 Open low voltage fuse6 1st stage pressure switch opened 5 times within one cycle--1 hour lockout7 System lockout Retry8 System lockout Recycle9 Reverse polarity or poor grounding10 Gas valve energized without call for heat12 Ignitor relay failure internal in board. Replace IFC
Solid Gas valve relay failure internal in board. Replace IFC3 Double 2nd stage pressure switch open; system reverts back to 1st stage heat
1 1st stage call for heat2 2nd stage call for heat3 W2 call present without W14 Y call present without G
Rapid Low flame sense current1 Standby mode or call for cooling
* The diagnostics will indicate the specific fault through the following code:
X340989P17 27
Service FactsTroubleshooting and Additional Information
S7 switch for W2 delay with single stage thermostat
and heating blower delays
S5-1 for HP or Non Heat pump selection
S5-2 for humidistat & BK enabling
Fault Retrieval
Board layout.
Status & Fault LED
CFM LED One flash equal 100 requested CFM
5 amp fuse CFM LED Jumper
Do not cut
Points for flame rectification
readings 1VDC = 1 uA
Blower air flow settings and
cooling time delays
28 X340989P17
Service Facts
Board layout.
S5 switches 1& 2
S4-3 & S4-4 control blower heating speeds. Reference blower tables for required
heating air flow.
S3-1 & S3-2 control system tonnage. These switches
configure air flow to match the tonnage of the condenser.
Reference door panel or blower performance tables for
settings
S3-3 & S3-4 control CFM per ton
S3-3 S3-4
S7 switches 3 & 4 for blower delay in heating
S7 switches 1 & 2 for W2 delay
Leave both switches off when using a 2- stage stat or enabling a W1 only call.
See Troubleshooting for details on Auto
X340989P17 29
Service Facts
W2 staging time delay options with single stage statThe auto mode can be used when employing a single stage heating thermostat. This mode allows the furnace to move into second stage based on the past three hour duty cycle of the furnace.*A furnace running in mild conditions will have a low duty cycle and a second stage delay of 10 to 12 minutes.*A furnace running in normal conditions will have an average duty cycle and a second stage delay of 5 to 7 minutes.*A furnace running in cold conditions will have a high duty cycle and a second stage delay of only 1 to 3 minutes.
Leave S7-1 & S7-2 to the off position when using a 2-stage thermostat.
The 50V51 Control board uses a 115 Silicone Nitride Igniter. This control board does not reduce the voltage to the igniter as other boards do. Do not use lower voltage igniters as replacement options. Only use the OEM igniter for replacement.
Fault Code RetrievalThe IFC has the ability to store fault codes in memory. To retrieve previous faults, push and release the last error button for 1 to 5 seconds. The LED will flash up to five stored fault codes beginning with the most recent. There is a two second delay between the faults displayed. The LED will flash two green flashes if there are no fault codes in memory.
Fault Code ResetPush and hold the last error button between 5 and 10 seconds to clear all faults from memory. The LED will flash three green flashes to confirm that memory has been cleared.
BK FeatureEnabling the BK feature is done through the S5-2 switch on the IFC. The switch comes in the de-activated “ON” position from the factory. Move this switch to the “OFF” position to enable the BK function of the board. Do not cut any jumpers on this board.The BK feature is used for blower modulation when us-ing a humidistat for de-humidification, a two step scroll compressor system, a 402 thermostat (with BK enabled), or residential zoning.A jumper must be placed between R & O on the low volt-age terminal board to engage the BK circuit
30 X340989P17
Service Facts
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.