Carrier 50GL-A Instruction Manual download pdf (Page 17)

FAN GRILLE

MOTOR

1/8" (3 mm) MAX BETWEEN

MOTOR AND FAN HUB

MOTOR SHAFT

A08474

Fig. 14 -- Fan Blade Position

Compressor

Access Panel

Blower

Access

Panel

Control

Access

Panel

A09210

Fig. 15 -- Unit Access Panels

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.

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 condenser grille and motor to top

cover.

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

expose the fan blade.

3. Inspect the fan blades for cracks or bends.

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

fan off the motor shaft.

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

14.

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

when tightening

7. Replace grille.

Electrical Controls and Wiring

Inspect and check the electrical controls and wiring annually. Be

sure to turn off the electrical power to the unit.

Remove access panels (see Fig. 15) to locate all the electrical

controls and wiring. Check all electrical connections for tightness.

Tighten all screw connections. If any smoky or burned connections

are noticed, disassemble the connection, clean all the parts, restrip

the wire end and reassemble the connection properly and securely.

After inspecting the electrical controls and wiring, replace the

access panels (see Fig. 15). Start the unit, and observe at least one

complete heating cycle and one complete cooling cycle to ensure

proper operation. If discrepancies are observed in either or both

operating cycles, or if a suspected malfunction has occurred, check

each electrical component with the proper electrical

instrumentation. Refer to the unit wiring label when making these

checkouts.

NOTE: Refer to the heating and/or cooling sequence of operation

in this publication as an aid in determining proper control

operation

Refrigerant Circuit

Inspect all refrigerant tubing connections and the unit base for oil

accumulations annually. Detecting oil generally indicates a

refrigerant leak.

EXPLOSION, SAFETY AND ENVIRONMENTAL

HAZARD

Failure to follow this warning could result in personal

injury, death or equipment damage.

This system uses Puron (R --410A) refrigerant which has

higher operating pressures than R--22 and other refrigerants.

No other refrigerant may be used in this system. Gauge set,

hoses, and recovery system must be designed to handle

Puron. If you are unsure, consult the equipment

manufacturer.

WARNING

If oil is detected or if low cooling performance is suspected,

leak-- test all refrigerant tubing using an electronic leak--detector,

halide torch, or liquid-- soap solution. If a refrigerant leak is

detected, refer to Check for Refrigerant Leaks section.

If no refrigerant leaks are found and low cooling performance is

suspected, refer to Checking and Adjusting Refrigerant Charge

section.

50GL-- A

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Carrier 50GL-A Instruction Manual Page 17

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