Carrier 48TC 17 Series Service And Maintenance Instructions page 42

WIND CAP ASSEMBLY
(SHOWN INVERTED
AS SHIPPED)
BURNER ASSEMBLY
Burners and Igniters
CAUTION
!
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.
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 necessary. Flames should be conical
in shape and enter the heat exchanger tubes with minor
impingement on the sheet metal flame components.
(SPONGE RUBBER)
REGULATOR
GASKET
REGULATOR
RETAINER
INDUCER FAN
MOTOR ASSEMBLY
GAS VALVE
Fig. 51 − Typical Heat Exchanger Assembly
HEATER TUBE
ASSEMBLY
SEAL STRIPS
SUPPORT INSULATION
ASSEMBLY
VESTIBULE PLATE
Orifice Projection
Refer to Fig. 52 for maximum projection dimension for
the orifice face to manifold tube.
1.00-in
(25.4 mm)
MANIFOLD
PIPE
Fig. 52 − Orifice Projection
Removal and Replacement of Gas Train
See Fig. 46, Fig. 51 and Fig. 53.
1. Shut off the gas using the manual shutoff switch lo-
cated in the gas supply line.
2. Turn the gas valve ON/OFF knob to the OFF position.
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C08227
ORIFICE
C08211