34
Fig. 43 — Typical Heat Exchanger Assembly
Burners and Igniters
MAIN BURNERS
To access the burner section, open the heater access door below
the indoor fan panel. At the beginning of each heating season, in-
spect for deterioration or blockage due to corrosion or other caus-
es. Observe the main burner flames and adjust, if necessary.
Flames should be conical in shape and enter the heat exchanger
tubes with minor impingement on sheet metal flame components.
ORIFICE PROJECTION
Refer to Fig. 44 for maximum projection dimension for orifice
face to manifold tube.
Fig. 44 — Orifice Projection
REMOVAL AND REPLACEMENT OF GAS TRAIN
See Fig. 38, 43, and 45.
1. Shut off gas using the manual shutoff switch located in the
gas supply line.
2. Turn the gas valve ON/OFF knob to the OFF position.
3. Shut off power to unit and install lockout tag.
4. Disconnect gas piping at unit gas valve.
5. Remove wires connected to gas valve. Mark each wire to
assist in re-connecting power to the gas valve.
BURNER ASSEMBLY
GAS VALVE
INDUCER FAN
MOTOR ASSEMBLY
VESTIBULE PLATE
SUPPORT INSULATION
ASSEMBLY
HEATER TUBE
ASSEMBLY
SEAL STRIPS
(SPONGE RUBBER)
REGULATOR
GASKET
REGULATOR
RETAINER
WIND CAP ASSEMBLY
(SHOWN INVERTED
AS SHIPPED)
~
MOUNTING
SCREWS (2)
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this CAUTION can result in premature wear
and damage to equipment.
When working on gas train, do not hit or plug orifice spuds.
CAUTION
PERSONAL INJURY HAZARD
Failure to follow this caution can result in personal injury.
Disconnect all electrical power when servicing the gas train.
Apply appropriate lockout/tag-out procedures.
ORIFICE
1.00-in
(25.4 mm)
MANIFOLD
PIPE
To Next Page
Loading...
Need help?
General
