2
Adapter Harness
Remove and discard.
Old Style ECM Inducer
New Style ECM Inducer
A13034
Fig. 1 -- ECM Inducers
DESCRIPTION AND USAGE
Use this inducer assembly kit to replace a failed inducer assembly.
The assembly cannot be disassembled to remove or repair individual
components. The kit contains the following items shown in
Table 1
.
NOTE
:
Inducer assembly consists of motor, wheel, inducer
housing, inlet gasket, inlet choke plate and condensate drain
gasket. It will be necessary to reuse some components from the old
inducer assembly.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit damage.
Using the incorrect inducer motor assembly could result in no
pressure switch operation, poor ignition, poor combustion,
erratic burner operation/burner pulsations, flame roll--out or
noise.
CAUTION
!
Table 1 – Kit Contents
NAME
QUANTITY
Inducer Assembly
1
Installation Instructions
1
Inlet Choke Plate (PSC and Ultra Low NOx only)
1 -- 2
Inducer Outlet Restrictor (40,000 input only)
1
Two--stage to Single--stage Adapter Harness (PSC
only except 140,000 input)
1
1/2--in.. # 8 Hex Head Screws 1 /2--in.
5
3/8--in. # 8 Hex Head Screws
2
Table 2 – Model Numbers
SINGLE SPEED PSC INDUCER MODELS
INPUT
KIT NUMBER
26,000
337938--784--CBP*
40,000
60,000
337938--785--CBP*
80,000
100,000
337938--786--CBP*
120,000
140,000
337938--787--CBP*
TWO SPEED PSC INDUCER MODELS
INPUT
KIT NUMBER
40,000
337938--784--CBP*
60,000
337938--785--CBP*
80,000
100,000
337938--786--CBP*
120,000
MODULATING MODELS
INPUT
KIT NUMBER
60,000
337938--790--CBP*
80,000
100,000
120,000
ULTRA LOW NOX MODELS
INPUT
KIT NUMBER
60,000
337938--790--CBP*
80,000
100,000
SINGLE SPEED EXPORT MODELS (220 VOLT, 50 HZ ONLY)
INPUT
KIT NUMBER
100,000
337938--782--CBP*
120,000
140,000
*All Brands
INSTALLATION
Unit Shut Down
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
Turn off the gas and electrical supplies to the furnace and
install lockout tag before performing any maintenance or
service. Follow the operating instructions on the label
attached to the furnace.
!
WARNING
1. Set room thermostat to lowest setting or “OFF”.
2. Disconnect power at external disconnect, fuse or circuit
breaker.
3. Turn off gas at external shut-off or gas meter.
4. Remove outer doors and set aside.
5. Turn electric switch on gas valve to OFF.
Vent Pipe Removal
NOTE
: The vent pipe may be connected to the furnace at the
rubber vent pipe support. Before cutting the vent pipe, loosen the
clamps around the vent pipe coupling and move the vent pipe
away from the furnace. Support the vent pipe as close to the
furnace as possible to prevent damage to the vent system.
NOTE
: If the vent pipe passes through the vent pipe coupling into
the vent elbow on the inducer, it may be necessary to cut the vent
pipe external to the casing, then re--cement the vent pipe with a
field--supplied coupling.
337938
