Burners And Igniters - Carrier WeatherMaster Puron 48HC D17 Service And Maintenance Instructions

WIND CAP ASSEMBLY
(SHOWN INVERTED
AS SHIPPED)
MOUNTING
SCREWS (2)
BURNER ASSEMBLY

Burners and Igniters

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.
MAIN BURNERS
To access the burner section, open the heater access door below
the indoor fan panel. At the beginning of each heating season,
inspect for deterioration or blockage due to corrosion or other
causes. Observe the main burner flames and adjust, if neces-
sary. Flames should be conical in shape and enter the heat ex-
changer tubes with minor impingement on sheet metal flame
components.
ORIFICE PROJECTION
Refer to Fig. 45 for maximum projection dimension for orifice
face to manifold tube.
REGULATOR
GASKET
REGULATOR
RETAINER
INDUCER FAN
MOTOR ASSEMBLY
GAS VALVE
Fig. 44 — Typical Heat Exchanger Assembly
HEATER TUBE
ASSEMBLY
SEAL STRIPS
(SPONGE RUBBER)
SUPPORT INSULATION
ASSEMBLY
VESTIBULE PLATE
1.00-in
(25.4 mm)
MANIFOLD
PIPE
Fig. 45 — Orifice Projection
REMOVAL AND REPLACEMENT OF GAS TRAIN
See Fig. 39, 44, and 46.
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.
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.
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.
35
ORIFICE
CAUTION