Carrier 48AW, 48EW, 48EY024-068, 48AY020-060, 48EK, 48AK, 48AJ, 48EJ Typical Gas Heating Section

NOTES:

1.Torque set screws on blower wheel to 70 in. lbs ± 2 in. lbs.

2.Torque set screw on propeller fan to 15 in. lbs ± 2 in. lbs.

3.Dimensions are in inches.

Fig. 65 — Typical Gas Heating Section

To inspect blower wheel, remove heat exchanger access panel. Shine a flashlight into opening to inspect wheel. If clean- ing is required, remove motor and wheel assembly by remov- ing screws holding motor mounting plate to top of combustion fan housing (Fig. 65 and 66). The motor, scroll, and wheel assembly can be removed from the unit. Remove scroll from plate. Remove the blower wheel from the motor shaft and clean with a detergent or solvent. Replace motor and wheel

	assembly.
	EVAPORATOR COIL — Remove access panels and clean as
	required with commercial coil cleaner.
	CONDENSER COIL — Clean condenser coil annually and
	as required by location and outdoor-air conditions. Inspect coil
	monthly; clean as required.
	CONDENSATE DRAIN — Check and clean each year at
	start of cooling season. In winter, keep drains and traps dry.
	FILTERS — Clean or replace at start of each heating and cool-
	ing season, or more often if operating conditions require. Refer
	to Tables 1A and 1B for type and size.
	NOTE: The unit requires industrial grade throwaway filters
Fig. 66 — Gas Heat Section Details	capable of withstanding face velocities up to 625 fpm.
	OUTDOOR-AIR INLET SCREENS — Clean screens with
	steam or hot water and a mild detergent. Do not use disposable
	filters in place of screens. See Fig. 37 for location of screens
	(filter track assembly).

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