Carrier 48/50AJ specifications Gas Valve Part Number EF33CW271, Main Burner Removal

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.

OUTLET PRESSURE	HIGH-FIRE REGULATOR
TAP (ON SIDE)	ADJUSTMENT SCREW
1/8-IN. 27 NPT
LOW-FIRE REGULATOR
ADJUSTMENT SCREW

INLET PRESSURE

TAP (ON SIDE) ON/OFF SWITCH 1/8-IN. 27 NPT

A48-8364

Fig. 51 — Gas Valve (Part Number EF33CW271)

A48-3733

Fig. 52 — Main Burner Removal

139