Front Access Panel

Specification SS-G-659, to all points of relative

elements. heater thermostat, fan speed relay, ex-

pansion valves, fluid pressure regulator, pressure

motion will provide free operation. Clean ac-

s w i t c h e s and the compressor bypass solenoid valve.

cumulated dirt and debris from the grilles.

d . Installation. I n s t a l l a t i o n o f t h e d i s c h a r g e a n d

b. Removal. Remove the fifteen screws and

w a s h e r s which secure the top panel to the top of the

intake air grilles shall be in the reverse order of

removal. Care shall be taken during installation of

air conditioner casing and the five screws and

w a s h e r s which secure the top panel to the top rear

t h e intake air grille to insure that the damper door

control chain operates freely.

of the casing. Loosen the two top screws which

secure the discharge air grille to the front of the

4-14. Condenser Coil Guard and Condenser Fan

casing. The top panel may then be lifted off for

Guard

maintenance of interior components or inspection

a. General. The condenser coil guard and

a n d repair of the gasketing and insulation affixed to

c o n d e n s e r fan guard protect the condenser coil and

the top panel and the air conditioner casing.

fan, respectively, f r o m p h y s i c a l d a m a g e a n d t h e

c. Servicing. Servicing of the top panel consists

i n t r o d u c t i o n of large contaminants such as paper or

of re-gluing of loose gasketing or insulation or

leaves from entering to degradate their per-

replacement of defective gasketing and insulation.

formance. The condenser fan guard also serves to

The fifteen washers originally removed should be

protect personnel from physical injury through

inspected and loose or defective washer gaskets

contact with the rotating condenser fan. The

should be replaced before re-installation.

condenser fan guard must be removed to provide

d . Installation. Installation of the top panel shall

con-

fan,

the

condenser

access to

the

be in the reverse order of removal. All missing

denser/evaporator

fan

motor,

the

refrigerant

mounting hardware shall be replaced during in-

piping system and unit wiring harnesses.

stallation.

b. Removal. Removal of the condenser fan

4-12. Front Access Panel

guard is accomplished by removing 8 screws and

a. General. The front access panel must be

washers located around the periphery of the guard

removed for access to the air conditioner control

w h i c h secure it to the back of the casing. Removal

panel and junction box, condensate drain tubes,

of the condenser coil guard is accomplished by

capacitors, liquid line solenoid valve, dehydrator,

r e m o v i n g the screws and washers located along the

pressure relief valve, and the compressor.

top and `bottom of the guard.

b . R e m o v a l . Loosen the two screws at the top of

CAUTION

t h e front access panel. Tilt the panel out at the top

Do not operate the air conditioner with

and lift up and out of the air conditioner casing.

the c o n d e n s e r f a n o r c o i l g u a r d

c. Servicing. Servicing of the front access panel

removed.

consists of re-gluing or replacement of loose or

c . Servicing. The only servicing required for the

defective gasketing or insulation. The two

condenser coil and fan guard consists of cleaning

mounting screws should be checked to insure that

a c c u m u l a t e d dirt and debris to provide unrestricted

the screw retaining washers are in place.

a i r flow. Minor deformations of the expanded metal

d. Installation. Installation of the front access

in the guards may be straightened to restore the

panel shall be in the reverse order of installation.

guard to a serviceable condition. Guards in which

the expanded metal or frames are broken or in

4-13. Discharge and Intake Air Grilles

which welds are cracked should be replaced.

a. General. The discharge air grille must be

d. Installation. Installation shall be in the

removed to provide access to the evaporator coil.

reverse order of removal. Care shall be taken in

The intake air grille must be removed to provide

i n s t a l l a t i o n of the coil and fan guard to insure that

a c c e s s to the air filter, thermostat sensing bulb, fan

condenser air leaves the fan directed upward from

inlet ring, evaporator fan, fresh air inlet damper

t h e coil and enters the coil in an upward direction

and

the

evaporator/condenser

fan

motor.

The

f r o m the outside to the inside face of the condenser

g r i l l e s serve to control the amount and direction of

coil guard.

flow of evaporator air.

b. Removal. The discharge or intake air grilles

4-15. Service Valve Access Cover

are removed by removing the four screws and

a. G e n e r a l . T h e s e r v i c e v a l v e a c c e s s c o v e r m u s t

washers which secure each grille to the air con-

b e removed for access to the suction and discharge

ditioner casing.

service valves, The cover must be removed to

c. Servicing. Servicing consists of re-gluing or

provide access for installation of charging and

replacement of loose or defective gasketing. Check

pressure test gauges to the suction and discharge

t o insure that the louvers, particularly on the intake

service valves.

air grille operate freely. If the louvers are ex-

b. Removal. Remove the service valve access

c e s s i v e l y tight, application of dry graphite, Federal

4-6