Carrier 48ES Instruction Manual download pdf (Page 50)

Removal of Gas T

rain

To remove the gas train for servicing:

1. Shut off main gas valve.

2. Shut off power to unit and install lockout tag.

3. Remove control access panel (See Fig. 19).

4. Disconnect gas piping at unit gas valve.

5. Remove fan partition mounting bracket (2 screws located

on the left side of control compartment on the fan partition

panel). Slide bracket forward, bottom first, to remove (See

Fig. 18).

6. Remove wires connected to gas valve. Mark each wire.

7. Remove the mounting screw that attaches the burner rack to

the unit base (See Fig. 18).

8. Partially slide the burner rack out of the unit (see Fig. 18

and 21). Remove ignitor and sensor wires at the burner as-

sembly. Remove rollout switch wires.

9. Slide the burner rack out of the unit (See Fig. 18 and 21).

10. To reinstall, reverse the procedure outlined above.

11. Check all connections for leaks.

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death or property damage.

Do not purge gas supply into the combustion chamber. Do

not use a match or other open flame to check for gas leaks.

Use a commercially available soap solution made

specifically for the detection of leaks to check all

connections. A fire or explosion may result causing

property damage, personal injury or loss of life.

WARNING

Outdoor Coil, Indoor Coil, and Condensate Drain Pan

Inspect the condenser coil, evaporator coil, and condensate drain

pan at least once each year.

The coils are easily cleaned when dry; therefore, inspect and clean

the coils either before or after each cooling season. Remove all

obstructions, including weeds and shrubs, that interfere with the

airflow through the condenser coil.

Straighten bent fins with a fin comb. If coated with dirt or lint,

clean the coils with a vacuum cleaner, using the soft brush

attachment. Be careful not to bend the fins. If coated with oil or

grease, clean the coils with a mild detergent and water solution.

Rinse coils with clear water, using a garden hose. Be careful not to

splash water on motors, insulation, wiring, or air filter(s). For best

results, spray condenser coil fins from inside to outside the unit. On

units with an outer and inner condenser coil, be sure to clean

between the coils. Be sure to flush all dirt and debris from the unit

base.

Inspect the drain pan and condensate drain line when inspecting

the coils. Clean the drain pan and condensate drain by removing all

foreign matter from the pan. Flush the pan and drain trough with

clear water. Do not splash water on the insulation, motor, wiring, or

air filter(s). If the drain trough is restricted, clear it with a

“plumbers snake” or similar probe device.

BLOWER

HOUSING

2 SETSCREWS

(HIDDEN)

C99085

Fig. 20 -- Removal of Motor and Blower Wheel

A07680

Fig. 21 -- Burner Rack Removed

Outdoor Fan

UNIT OPERATION HAZARD

Failure to follow this caution may result in damage to unit

components.

Keep the condenser fan free from all obstructions to ensure

proper cooling operation. Never place articles on top of the

unit.

CAUTION

1. Remove 6 screws holding outdoor grille and motor to top

cover.

2. Turn motor/grille assembly upside down on top cover to

expose fan blade.

3. Inspect the fan blades for cracks or bends.

4. If fan needs to be removed, loosen setscrew and slide fan off

motor shaft.

5. When replacing fan blade, position blade as shown in Fig.

22.

6. Ensure that setscrew engages the flat area on the motor shaft

when tightening.

7. Replace grille.

48ES-- A

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Carrier 48ES Instruction Manual Page 50

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