51
4. Clean coil using a commercial coil cleaner or dishwasher
detergent in a pressurized spray canister. Wash bot h sides
of coil and flush with clean water. For best results,
back-flush toward return-air section to remove foreign
material. Flush condensate pan after completion.
5. Reinstall economizer and filters.
6. Reconnect wiring.
7. Replace access panels.
Condenser
Coil
Inspect coil monthly. Clean condenser coil annually, and as
required by location and outdoor air conditions.
One--Row Coil
Wash coil with commercial coi l c leaner. It is n ot necessary to
remove top panel.
2-Row Coils
Clean coil as follows:
1. Turn off unit power and tag disconnect.
2. Remove top panel screws on condenser end of unit.
3. Remove condenser coil corner post. (See Fig. 45.) To hold
top panel open, place coil corner pos t between top panel
and center post. (See Fig. 46.)
C06044
Fig. 45 --- Cleaning Condenser Coil
C06045
Fig. 46 --- Propping Up Top Panel
C06046
Fig. 47 --- Separating Coil Sections
4. Remove device holding coil sections together at return end
of condenser coil. Carefully separate the outer coil section
3 to 4 in. from the inner coil section. (See Fig. 47.)
5. Use a water hose or other suitable equipment to flush
down between the 2 coil sections to remove dirt and
debr is. Clean the outer surfaces with a stiff b rush in the
normal manner.
6. Secure the sections together. Reposition the out er coil
section and remove the coil corner post from between the
top panel and center pos t. Install the coil corner and center
posts. Replace all screws.
Condensate
Drain
Check and clean each year at the s tart of the cooling season. In
winter, keep the drain dry or protect it against freeze-up.
Filters
Clean or replace at the start of each heating and cooling season, or
more of ten if operating conditions require it. Replacement filters
must be the same dimensions as the original filters.
Outdoor--Air Inlet Scr
een
Clean the screen with steam or hot water and a mild detergent. Do
not use disposable filters in place of screens.
Step 2 —Lubrication
Compressor
The compressor is charged with the correct amount of oil at the
factory.
Fan Motor
Bearings
Fan motor bearings are permanently lubricated. No further
lubrication is required. No lubrication of condenser-fan or
evaporator-fan motors is required.
Evaporator Fan Belt
Adjustment
Inspect evaporator fan belt for wear, proper belt t ension, and
pulley alignment as conditions require or at the beginning of each
heating and air conditioning season. Refer to Step 7 -- Adjust
Evaporator Fan Speed for adjustment and alignment procedures.
551B,C
