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Main Burners — For all applications, main burners are
factory set and should require no adjustment.
MAIN BURNER REMOVAL (Fig. 52)
1. Shut off (field-supplied) manual main gas valve.
2. Shut off power supply to unit.
3. Remove heating access panel.
4. Disconnect gas piping from gas valve inlet.
5. Remove wires from gas valve.
6. Remove wires from rollout switch.
7. Remove sensor wire and ignitor cable from IGC board.
8. Remove 2 screws securing manifold bracket to basepan.
9. Remove 4 screws that hold the burner support plate
flange to the vestibule plate.
10. Lift burner assembly out of unit.
11. Reverse procedure to re-install burners.
Filter Drier — Replace whenever refrigerant system is ex-
posed to atmosphere.
Replacement Parts — A complete list of replacement
parts may be obtained from any Carrier distributor upon request.
INLET PRESSURE
TAP (ON SIDE)
1/8-IN. 27 NPT
OUTLET PRESSURE
TAP (ON SIDE)
1/8-IN. 27 NPT
HIGH-FIRE REGULATOR
ADJUSTMENT SCREW
LOW-FIRE REGULATOR
ADJUSTMENT SCREW
ON/OFF SWITCH
Fig. 51 — Gas Valve (Part Number EF33CW271)
A48-8364
A48-3733
Fig. 52 — Main Burner Removal