PTAC-SVX01C-EN
31
Maintenance
5.
Reinstall the filter by reattaching
the hook to the bottom of the
vent door and replacing the two
screws, slide the chassis back
into the wall sleeve, secure it in
place with six screws and
reinstall the front cabinet.
Scheduled Maintenance
To achieve top performance and high
efficiency, a cleaning/ inspection
schedule must be established for this
unit. Maintaining this schedule can
be accomplished by either a local
maintenance staff or an authorized
servicer and must follow the
instructions described in this manual.
•
If the unit is operated in a dusty
climate, dust may collect in the
basepan and clog the condenser
coil. It is advisable to remove the
unit from the sleeve and
thoroughly clean the basepan
and condenser coil on a periodic
basis.
Figure 20.
Vent (left side of unit)
Figure 21.
Vent filter removal
Vent door
•
If the unit is installed ocean side
or in a corrosive atmosphere, its
life may be greatly reduced by
the corrosive environment.
Under these conditions the unit
should be removed from the
sleeve and completely cleaned at
least four times per year. At that
time any scratches or blisters on
the painted surfaces should be
sanded and repainted.
Refrigeration System
Service
WARNING
Ensure Terminal Cover is in
Place!
Do not plug in this product or apply
power to the compressor if the
compressor terminal cover is
removed or is not firmly in place.
Failure to follow these instructions
could result in a fire that could cause
death, personal injury, or property
damage.
Service operations requiring opening
of the hermetically sealed
refrigeration system should be taken
to a well equipped shop where
special equipment for evacuating,
dehydrating, charging and testing is
available. The following equipment is
necessary:
•
Nitrogen of no more than 0.0012
grains of moisture.
•
Vacuum pump capable of
evacuating to a minimum of 50
microns.
•
Micron gauge to check vacuum
•
Refrigerant charging cylinder
accurate to within 1/4 oz.
•
Electronic leak detector
•
Electrical equipment to test
compressors, capacitors, voltage
relays, and overload protectors
•
Voltmeter, ammeter, and
wattmeter
•
Silver soldering and brazing
equipment - Pinch off tools ¼ in
to 5/8 in
•
Thermocouple tester
WARNING
Hazardous Pressures!
If a heat source is required to raise
the tank pressure during removal of
refrigerant from cylinders, use only
warm water or heat blankets to raise
the tank temperature. Do not exceed
a temperature of 150°F. Do not, under
any circumstances apply direct flame
to any portion of the cylinder. Failure
to follow these safety precautions
could result in a violent explosion,
which could result in death or
serious injury.
CAUTION
Freezing Temperatures!
Do not allow liquid refrigerant to
contact skin. If it does, treat the
injury similar to frostbite. Slowly
warm the affected area with
lukewarm water and seek immediate
medical attention. Direct contact
with liquid refrigerant may cause
minor or moderate injury.
Dehydrating and Evacuating
Refrigeration System
A rather popular misconception
exists that since air conditioners
normally operate with a refrigerant
temperature above 32°F, moisture in
the system is harmless. Nothing
could be further from the truth.
Oxygen from moisture plus normal
compressor and motor heat reacts
chemically with the refrigerant and
oil to form corrosive hydrochloric
and hydrofluoric acids. These acids
contribute to the break down of
motor winding insulation and the
corrosion of compressor working
parts and cause unnecessary
compressor failure.
Sludge, which is a residue of the
chemical reaction, coats all
compressor parts, the inside of
refrigerant tubing, and may even
restrict refrigerant flow through the
capillary tube(s).
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