Carrier 48HC*04–14 - Burners and Igniters; Main Burners; Removal and Replacement of Gas Train; Orifice Projection

36
Flue Bae
(Low NOx only)
Heater Tube
Assembly
Seal Strips, Sponge Rubber
Regulator
Gasket
Regulator
Bae Assembly
(Low NOx only)
Retainer
Support
Insulation
Assembly
Wind Cap Assembly
(shown inverted,
as shipped)
Burner Assembly
Inducer Fan-Motor
Assembly
C08227
Fig. 49 -- Heat Exchanger Assembly
3. The blower wheel can be cleaned at this point. If ad-
ditional cleaning is required, continue with Steps 4.
and 5.
4. Remove the blower from the motor shaft by removing
two setscrews.
5. Removing motor: remove the four screws holding the
motor to the mounting plate. Remove the motor cool-
ing fan by removing one setsc rew. Remove nuts that
hold the motor to the mounting plate.
6. Reverse the procedure outlined above to reinstall the
motor.
Burners and Igniters
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in
equipment damage.
When working on gas train, do not hit or plug
orifice spuds.
CAUTION
!
Main Burners
To access burners, remove burner access panel and slide
out burner partition. At the beginning of each heating
season, inspect for deterioration or blockage due to
corrosion or other ca uses. Observe t he main burne r flames
and adjust, if necessary.
Orifice projection — Refer to Fig. 50 for maximum
projection dimension for orifice face to manifold tube.
ORIFICE
1.00-in
(25.4 mm)
MANIFOLD
PIPE
C08211
Fig. 50 -- Orifice Projection
Removal and Replacement of Gas Train
See Fig. 45, Fig. 49 a nd Fig. 51.
1. Shut off manual gas valve.
2. Shut off power to unit.
3. Slide out burner partition.
4. Disconnect gas piping at unit gas valve .
5. Remove wires connected to gas valve. Mark each
wire.
48HC