Carrier 48/50PM C16-28 Evaporator Fan Service and Replacement, 48PG03−07 Shown, 48/50PG03−14

ROLLOUT	INDUCED
SWITCH	DRAFT
	MOTOR
	COMBUSTION
	FAN HOUSING
	MAIN GAS
	VALVE
HEAT EXCHANGER	MAIN BURNER SECTION
SECTION
	C07037

Fig. 50 − 48PG03−14 Typical Gas Heating Section

(48PG03−07 Shown)

COMBUSTION

FAN HOUSING

HEAT	INDUCED
EXCHANGER
	DRAFT
SECTION
	MOTOR

MAIN GAS

IGC BOARD VALVE (HIDDEN)

MAIN BURNER

SECTION

C07259

Fig. 51 − 48PM16−28

Typical Gas Heating Section

Condenser and Evaporator−Fan Motor Bearings

The condenser-fan and evaporator-fan motors have permanently sealed bearings, so no field lubrication is necessary.

Economizer or Manual Outside Air Damper

If blade adjustment is required, refer to unit or accessory installation instructions.

Evaporator Fan Service and Replacement

The units feature a slide-out fan deck for easy servicing of the indoor-fan motor, pulleys, belt, and bearings. To service components in this section, perform the following procedure:

1.Turn off unit power.

2.Open the fan section access door.

3.Remove two no. 10 screws at front of slide-out fan deck. Save screws. (See Fig. 52 or 53.)

4.For 48/50PG03−14 units, disconnect the electrical wires connected to the slide−out fan deck (supply air thermistor and fan status switch if installed). Wires may be damaged if not disconnected. For 48/50PM16−28 units, disconnect the limit switch wires located on the right side of the fan deck (48 series only). Other wires do not need to be disconnected.

5.Fan deck can now be slid out to access serviceable components.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in damage to the unit.

DO NOT SLIDE FAN DECK OUT PAST THE FAN DECK STOP. If further access is required, the fan deck must be supported. Make sure plugs and wiring are not pinched between fan housing and unit sheet metal post.

6.To replace fan deck to operating position, slide fan deck back into the unit. Secure with the two no. 10 screws removed in Step 3.

7.Re-attach electrical wires.

8.Close fan section access door.

9.Restore power to unit.

FAN DECK STOP

MOTOR

MOUNTING

BASE

SCREW (HIDDEN)

FAN

MOTOR PULLEY

PULLEY

SCREW

SLIDE-OUT

FAN DECK

C06177

Fig. 52 − 48/50PG03−14

Evaporator−Fan Motor Adjustment

	MOTOR
FAN	PULLEY
	(HIDDEN)
PULLEY
	MOTOR
LIMIT	MOUNTING
	BASE
SWITCH
QUICK	SLIDE-OUT
CONNECT
(48PM ONLY)	FAN DECK

C08008

Fig. 53 − 48/50PM16−28

Evaporator−Fan Motor Adjustment

48/50PG and PM

85