Trane AUH2B060A9V3VA, AUH2B080A9V3VA, AUH2B080A9V4VA, AUH2C100A9V4VA, AUH2C100A9V5VA Service Facts
...
Service Facts
UH2-SF-1G
Gas Furnace – Var. Speed Blower –
AVAILABLE IN FRENCH CANADIAN (FC)
Var. Speed Inducer – Two Stage Heat –
Direct Vent
Models: * - First letter may be “A” or “T”
X343070P08
*UH2B060A9V3VA
*UH2B080A9V3VA
*UH2B080A9V4VA
*UH2C100A9V4VA
*UH2C100A9V5VA
*UH2D120A9V5VA
*DH2B060A9V3VA
*DH2B080A9V3VA
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.
WARNING
DISCONNECT POWER BEFORE SERVICING
PRODUCT SPECIFICATIONS
MODEL
TYPE
RATINGS
2
1st Stage Input BTUH
1st Stage Capacity BTUH (ICS)
2nd Stage Input BTUH
2nd Stage Capacity BTUH (ICS)
AFUE
Temp. rise (Min.-Max.) °F.
BLOWER DRIVE
Diameter - Width (In.)
No. Used
Speeds (No.)
CFM vs. in. w.g.
Motor HP
R.P.M.
Volts / Ph / Hz
COMBUSTION FAN - Type
Drive - No. Speeds
Motor HP - RPM
Volts / Ph / Hz
FLA
FILTER — Furnished?
Type Recommended
Hi Vel. (No.-Size-Thk.)
VENT — Size (in.)
HEAT EXCHANGER
Type -Fir ed
-Unfired
Gauge (Fired)
ORIFICES — Main
Nat. Gas. Qty. — Drill Size
L.P. Gas Qty. — Drill Size
GAS VALVE
PILOT SAFETY DEVICE
Type
BURNERS — Type
Number
POWER CONN. — V / Ph / Hz
Ampacity (In Amps)
Max. Overcurrent Protection (Amps)
PIPE CONN. SIZE (IN.)
DIMENSIONS
Crated (In.)
WEIGHT
Shipping (Lbs.) / Net (Lbs)
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.
3
3
4
*UH2B060A9V3VA
Upflow / Horizontal
39,000
37,830
60,000
58,200
97
35 - 65
DIRECT
10 x 8
1
Variable
See Fan Performance Table
1/2
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
1 - 17x25 - 1 in.
2 Round
Aluminized Steel - Type I
20
3 — 45
3 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
3
115/1/60
11.1
15
1/2
H x W x D
41-3/4 x 19-1/2 x 30-1/2
158 / 146
*DH2B080A9V4VA
*DH2C100A9V4VA
*DH2D120A9V5VA
*UH2B080A9V3VA
Upflow / Horizontal
52,000
50.440
80,000
77,600
97
35 - 65
DIRECT
10 x 8
1
Variable
See Fan Performance Table
1/2
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
1 - 17x25 - 1 in.
2 Round
Aluminized Steel - Type I
20
4 — 45
4 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
4
115/1/60
11.1
15
1/2
H x W x D
41-3/4 x 19-1/2 x 30-1/2
168 / 156
1
*UH2B080A9V4VA
Upflow / Horizontal
52,000
50,440
80,000
77,600
97
35 - 65
DIRECT
11 x 8
1
Variable
See Fan Performance Table
3/4
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
1 - 17x25 - 1 in.
2 Round
Aluminized Steel - Type I
20
4 — 45
4 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
4
115/1/60
13.5
20
1/2
H x W x D
41-3/4 x 19-1/2 x 30-1/2
170 / 158
*UH2C100A9V4VA
Upflow / Horizontal
65,000
62,855
100,000
96,700
97
35 - 65
DIRECT
10 x 10
1
Variable
See Fan Performance Table
3/4
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
1 - 20x25 - 1 in.
3 Round
Aluminized Steel - Type I
20
5 — 45
5 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
5
115/1/60
13.5
20
1/2
H x W x D
41-3/4 x 23 x 30-1/2
197 / 185
NOTICE: The manufacturer has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
© 2011 Trane All Rights Reserved
Service Facts
MODEL
TYPE
RATINGS
2
1st Stage Input BTUH
1st Stage Capacity BTUH (ICS)
2nd Stage Input BTUH
2nd Stage Capacity BTUH (ICS)
AFUE
Temp. rise (Min.-Max.) °F.
BLOWER DRIVE
Diameter - Width (In.)
No. Used
Speeds (No.)
CFM vs. in. w.g.
Motor HP
R.P.M.
Volts / Ph / Hz
COMBUSTION FAN - Type
Drive - No. Speeds
Motor HP - RPM
Volts / Ph / Hz
FLA
FILTER — Furnished?
Type Recommended
Hi Vel. (No.-Size-Thk.)
VENT — Size (in.)
HEAT EXCHANGER
Type -Fir ed
-Unfired
Gauge (Fired)
ORIFICES — Main
Nat. Gas. Qty. — Drill Size
L.P. Gas Qty. — Drill Size
GAS VALVE
PILOT SAFETY DEVICE
Type
BURNERS — Type
Number
POWER CONN. — V / Ph / Hz
Ampacity (In Amps)
Max. Overcurrent Protection (Amps)
PIPE CONN. SIZE (IN.)
DIMENSIONS
Crated (In.)
WEIGHT
Shipping (Lbs.) / Net (Lbs)
3
3
4
PRODUCT SPECIFICATIONS
*UH2C100A9V5VA
Upflow / Horizontal
65,000
62,855
100,000
96,700
96.7
35 - 65
DIRECT
11 x 10
1
Variable
See Fan Performance Table
1
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
1 - 20x25 - 1 in.
3 Round
Aluminized Steel - Type I
20
5 — 45
5 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
5
115/1/60
16.3
20
1/2
H x W x D
41-3/4 x 23 x 30-1/2
199 / 187
See Fan Performance Table
Aluminized Steel - Type I
41-3/4 x 26-1/2 x 30-1/2
1
*UH2D120A9V5VA
Upflow / Horizontal
78,000
75,426
120,000
116,040
96.7
40 - 70
DIRECT
10 x 10
1
Variable
1
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
1 - 24x25 - 1 in.
3 Round
20
6 — 45
6 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
6
115/1/60
15.2
20
1/2
H x W x D
206 / 193
*DH2B060A9V3VA
Downflow / Horizontal
39,000
37,000
60,000
57,000
95
35 - 65
DIRECT
10 x 8
1
Variable
See Fan Performance Table
1/2
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
2 - 14x20 - 1 in.
2 Round
Aluminized Steel - Type I
20
3 — 45
3 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
3
115/1/60
11.1
15
1/2
H x W x D
41-3/4 x 19-1/2 x 30-1/2
160/ 146
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.
2
X343070P08
Service Facts
MODEL
TYPE
RATINGS
2
1st Stage Input BTUH
1st Stage Capacity BTUH (ICS)
2nd Stage Input BTUH
2nd Stage Capacity BTUH (ICS)
AFUE
Temp. rise (Min.-Max.) °F.
BLOWER DRIVE
Diameter - Width (In.)
No. Used
Speeds (No.)
CFM vs. in. w.g.
Motor HP
R.P.M.
Volts / Ph / Hz
COMBUSTION FAN - Type
Drive - No. Speeds
Motor HP - RPM
Volts / Ph / Hz
FLA
FILTER — Furnished?
Type Recommended
Hi Vel. (No.-Size-Thk.)
VENT — Size (in.)
HEAT EXCHANGER
Type -Fir ed
-Unfired
Gauge (Fired)
ORIFICES — Main
Nat. Gas. Qty. — Drill Size
L.P. Gas Qty. — Drill Size
GAS VALVE
PILOT SAFETY DEVICE
Type
BURNERS — Type
Number
POWER CONN. — V / Ph / Hz
Ampacity (In Amps)
Max. Overcurrent Protection (Amps)
PIPE CONN. SIZE (IN.)
DIMENSIONS
Crated (In.)
WEIGHT
Shipping (Lbs.) / Net (Lbs)
3
3
4
PRODUCT SPECIFICATIONS
*DH2B080A9V3VA
Downflow / Horizontal
52,000
49,400
80,000
76,000
95
35 - 65
DIRECT
10 x 8
1
Variable
See Fan Performance Table
1/2
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
2 - 14x20 - 1 in.
2 Round
Aluminized Steel - Type I
20
4 — 45
4 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
4
115/1/60
11.1
15
1/2
H x W x D
41-3/4 x 19-1/2 x 30-1/2
168 / 158
*DH2B080A9V4VA
Downflow / Horizontal
52,000
49,500
80,000
76,000
95
35 - 65
DIRECT
11 x 8
1
Variable
See Fan Performance Table
3/4
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
2 - 14x20 - 1 in.
2 Round
Aluminized Steel - Type I
20
4 — 45
4 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
4
115/1/60
13.5
20
1/2
H x W x D
41-3/4 x 19-1/2 x 30-1/2
172 / 160
1
*DH2C100A9V4VA
Downflow / Horizontal
65,000
61,750
100,000
95,000
95
35 - 65
DIRECT
10 x 10
1
Variable
See Fan Performance Table
3/4
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
2 - 16x20 - 1 in.
3 Round
Aluminized Steel - Type I
20
5 — 45
5 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
5
115/1/60
13.5
20
1/2
H x W x D
41-3/4 x 23 x 30-1/2
185 / 175
*DH2D120A9V5VA
Downflow / Horizontal
78,000
74,000
120,000
114,000
95
40 - 70
DIRECT
10 x 10
1
Variable
See Fan Performance Table
1
Variable
115/1/60
Centrifugal
Direct - Variable
1/50 - 5000
33 - 110/3/60 - 180
1.0
Yes
High Velocity
2 - 16x20 - 1 in.
3 Round
Aluminized Steel - Type I
20
6 — 45
6 — 56
Redundant - Two Stage
Hot Surface Igniter
Multiport Inshot
6
115/1/60
15.2
20
1/2
H x W x D
41-3/4 x 26-1/2 x 30-1/2
206 / 196
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.
X343070P08
3
Service Facts
▲
▲
▲
▲
▲
▲
▲
SAFETY SECTION
!
WARNING
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
ELECTRIC SHOCK HAZARD
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. FAILURE TO FOLLOW THIS
WARNING COULD RESULT IN AN ELECTRICAL SHOCK,
FIRE, INJURY, 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 COMMERCIALLY 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.
!
WARNING
EXPLOSION HAZARD
PROPANE GAS IS HEAVIER THAN AIR AND MAY COLLECT IN ANY LOW AREAS OR CONFINED SPACES. IF
THE GAS FURNACE IS INSTALLED IN A BASEMENT, AN
EXCAVATED AREA OR A CONFINED SPACE, IT IS
STRONGLY RECOMMENDED TO CONTACT A GAS
SUPPLIER TO INSTALL A GAS DETECTING WARNING
DEVICE IN CASE OF A GAS LEAK
NOTE: The manufacturer of your furnace does NOT test any
detectors and makes no representations regarding any
brand or type of detector.
!
WARNING
SAFETY HAZARD
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
ELECTRIC SHOCK HAZARD
DISCONNECT POWER TO THE UNIT BEFORE REMOVING
THE BLOWER DOOR. FAILURE TO FOLLOW THIS WARNING
COULD RESULT IN AN PROPERTY DAMAGE, PERSONAL
INJURY, OR DEATH.
4
X343070P08
Service Facts
▲
▲
▲
▲
▲
▲
▲
▲
▲
The following warning complies with State of California law, Proposition 65.
!
WARNING
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.
Skin Contact – Wash affected areas gently with soap
EXPLOSION HAZARD
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
BURN HAZARD
DO NOT TOUCH IGNITER. IT IS EXTREMELY HOT. FAILURE
TO FOLLOW THIS WARNING COULD RESULT IN SEVERE
BURNS.
RISK OF ELECTRIC SHOCK:
THESE SERVICING INSTRUCTIONS ARE FOR USE BY
QUALIFIED PERSONNEL ONLY. TO REDUCE THE RISK
OF ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THESE OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO
DO SO. FAILURE TO FOLLOW THIS WARNING COULD
RESULT IN PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
The integrated furnace control is polarity sensitive. The hot
leg of the 115 VAC power must be connected to the BLACK
field lead.
If symptoms persist, seek medical
attention.
and warm water after handling.
!
WARNING
!
WARNING
!
WARNING
!
CAUTION
!
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
!
CAUTION
Do NOT touch igniter. It is extremely hot.
SEQUENCE OF OPERATION
!
WARNING
EXPLOSION HAZARD
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
SAFETY HAZARD
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.
COMFORT CONTROL CALL FOR HEAT (2-STAGE COMFORT
CONTROL)
Call for 1st Stage only:
W1 Comfort Control contacts close signaling the control
module to run its self-check routine. After the control module
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 Pressure
Switch contacts will close and the ignitor warm up period will
begin. The ignitor will heat for approx. 20 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:
W2 Comfort Control 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. The Gas Valve is energized in 2nd
Stage and the indoor blower motor in high speed.
X343070P08
5
Service Facts
▲
▲
2nd Stage satisfied, 1st Stage still called:
W2 Comfort Control 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. The indoor blower motor is
reduced to low speed.
1st stage satisfied:
W1 Comfort Control 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 fan off period (Field
selectable at 60, 100, 140 or 180 seconds), then will be deenergized by the control module.
Comfort Control call for heat (1-Stage Comfort Control)
W1/ W2 (jumpered) Comfort Control contacts close signaling
a call for heat. 1st Stage sequence of operation remains the
same as above. 2nd Stage Heat will energize after the Stage
delay timer (adjustable) has expired.
Comfort Control satisfied:
W1/ W2 (jumpered) contacts close signaling the control
module to close the Gas Valve. The induced draft blower is
switched to low speed and de-energized after the post purge
timer has expired. The indoor blower motor will continue to
operate after the flames are extinguished and then is
switched to low heat speed for the FAN-OFF period.
Table 1 and Figure 1 explain the delay-off settings:
Table 1
COOLING OFF - DELAY OPTIONS
SWITCH SETTINGS SELECTION
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 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 Service Facts
for complete wiring setup for ENHANCED MODE. The graph
which follows, shows the ramping process.
100% if necessary
80%
Dehumidify
50%
NOMINAL
AIRFLOW
50%
INDOOR BLOWER TIMING
!
WARNING
SAFETY HAZARD
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
TECHNICIAN’S RESPONSIBILITY TO RECOGNIZE THESE
HAZARDS AND PROCEED SAFELY.
!
CAUTION
The integrated furnace control is polarity sensitive. The hot
leg of the 115 VAC power must be connected to the BLACK
field lead.
Heating: The integrated furnace control module controls
the indoor blower. The blower start is fixed at 45 seconds
after ignition. The FAN-OFF period is field selectable by
dip switches SW-2, #1 and #2 at 60, 100, 140, or 180
seconds. The factory setting is 100 seconds.
W1-W2 stage delay (jumpered together) is field selectable by
dip switch SW-1, #1 and #2 at .5, 5, 10 or 15 minutes. The
factory setting is 10 minutes. (See wiring diagram).
Cooling: The fan delay-off period is set by dip switches on the
Integrated Furnace Control. The options for cooling delay off
is field selectable by dip switches #5 and #6.
OFF
Fast Coil Cooling
1
minute
minutes
7.5
Efficiency
OFF
3
minutes
Figure 1
6
X343070P08
PERIODIC SERVICING REQUIREMENTS
▲
▲
▲
▲
▲
Service Facts
!
WARNING
ELECTRIC SHOCK HAZARD
DISCONNECT POWER TO THE UNIT BEFORE REMOVING
THE BLOWER DOOR. ALLOW A MINIMUM OF 15 SECONDS
FOR IFC POWER SUPPLY TO DISCHARGE TO 0 VOLTS.
FAILURE TO FOLLOW THIS WARNING COULD RESULT IN
PERSONAL INJURY FROM MOVING PARTS.
!
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.
!
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 COMMERCIALLY 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.
!
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.
1. GENERAL INSPECTION – Examine the furnace
installation annually for the following items:
a. All flue product carrying areas external to the furnace
(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 corrosion.
c. The return air duct connection(s) is physically sound,
is sealed to the furnace and terminates outside 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 motor
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.
!
CAUTION
Do NOT touch igniter. It is extremely hot.
4. IGNITER – This unit has a hot surface direct ignition
device that automatically lights the burners. Please note
that it is very fragile and should be handled with care.
5. BURNER – Gas burners do not normally require scheduled servicing, however, accumulation of foreign material
may cause a yellowing flame or delayed ignition. 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 burners,
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
burners.
Clean burners with brush and/or vacuum cleaner. Reassemble 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
annually using brushes and vacuum cleaner.
NOTE: On LP (propane) units, due to variations in BTU
content and altitude, servicing may be required at
shorter intervals.
6. HEAT EXCHANGER/FLUE PIPE – These items must be
inspected for signs of corrosion, and/or deterioration at
the beginning of each heating season by a qualified service
technician and cleaned annually for best operation. To
clean flue gas passages, follow recommendations below:
a. Turn off gas and electric power supply.
b. Inspect flue pipe exterior for cracks, leaks, holes or
leaky joints. Some discoloration of PVC pipe is
normal.
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 Item 5.)
f. Use a mirror and flashlight to inspect interior of heat
exchanger, be careful not to damage the igniter, flame
sensor or other components.
g. If any corrosion is present the 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
can occur. (See Condensate Drain in Installer’s Guide)
X343070P08
7
Service Facts
*UH2 WIRING DIAGRAM
8
From drawing D344303
X343070P08
*UH2 SCHEMATIC DIAGRAM2
Service Facts
X343070P08
From drawing D344303
9
Service Facts
*DH2 WIRING DIAGRAM
10
From drawing D344304
X343070P08
*DH2 SCHEMATIC DIAGRAM
Service Facts
X343070P08
From drawing D344304
11
Service Facts
Q
uick
These service procedures will work on ECM-2TM motors and their motor
control board and their 16 Wire Low Voltage Control Cable.
1. J
umper
L
ow Voltage Terminal board
D
oes motor run
24 V
olt
A.C. "R" T
?
C
heck
M
otor
W
ill
ECM -2TM QUICK CHECK
B
lower
M
otor
erminal to
.
W
"G"
ill Not
terminal on the
N
R
ot
un
R
un
NO:
YES:
check Comfort Control
and Comfort Control wire.
2. U
J
D
NO:
YES:
Go to step #2.
Motor runs,
nplug
umper
oes the motor run
Go to step #3.
Replace the
variable speed
interface board
on the furnace.
16
24 V
wire low voltage harness from the interface board
olts
A.C. to
?
Jumper
pins
#12, #15
and common pins
#1
and
.
#3.
24 V.A.C.
12
#9 PIN WIRE IS ORANGE
#1 PIN WIRE IS BLUE
To Pin #12
To Pin #15
To Pin #1 & #3
X343070P08
3. U
nplug
umper
J
and
#15
D
oes motor run
16
24 V
and pins
Q
uick
wire low voltage harness fr om the motor
olts
A.C. to
#1
C
heck
motor low voltage plug pins
and
#3
M
otor
which are common
W
ill
N
.
ot
?
Service Facts
R
un
.
#12
NO:
YES:
Go to step #4.
Fault is in the
16 wire low voltage
harness. Repair or
replace it.
4. Is
pin
the line voltage to the motor high voltage power plug
#4
and pin
#5
correct
24 VOLT A.C.
TO PIN #1 & #3
?
NO:
YES:
Correct line voltage fault.
Live voltage correct and
motor will not run.
Replace motor.
X343070P08
#3
#4
#5
GROUND
TO PIN #4
A.C. VOLTS
TO PIN #5
13
Service Facts
TROUBLESHOOTING ECM-2™ MOTOR
WITH TROUBLESHOOTING CIRCUIT BOARD
Trouble Shooting Kit
AND 4 WIRE TEST CABLE
ECM-2™ TROUBLESHOOTER KIT
Order Pub. No. 34-3403-01
Purpose: Verify proper signals are being received by the motor control board and are being
sent to the ECM-2™ Motor by the 16 wire low voltage motor harness.
1. Turn power off
2. 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 motor
control board.
7. If 24 volts A.C. is not present, troubleshoot
and repair as needed.
14
8. If 24 volts A.C. is present, check the troubleshooter “R” L.E.D. and check continuity of the
16 wire cable, pin 1 to pin 1, through pin 16. If
troubleshooter “R” L.E.D. is good and 16 wire
cable pin #1 and pin #12 are good, repair or
replace motor control board.
9. The green “C.F.M.” L.E.D.’s should be
flashing on the motor control board and
troubleshooting board. If the green CFM
L.E.D. on the motor control board does not
flash, check the troubleshooter “CFM” L.E.D.
and continuity of the 16 wire harness, pin #8
and #16. If troubleshooter “CFM” L.E.D.
and harness are good, replace motor
control board.
X343070P08
Loading...