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Maintenance
Maintenance
Perform all of the indicated
maintenance procedures at the
intervals scheduled. This will prolong
the life of the unit and reduce the
possibility of costly equipment failure.
Monthly
Conduct the following maintenance
inspections once per month.
Warning: Open and lock unit
!
disconnect to prevent injury or death
from electrical shock or contact with
moving parts.
•
necessary.
• Check unit wiring to ensure all
connections are tight and that the
wiring insulation is intact.
• Check drain pans and condensate
piping to insure they are free of
obstacles.
• Manually rotate the outdoor fan to
insure proper operation. Inspect
the fan mounting hardware for
tightness.
Maintenance Log
1
Ambient
Temp
Date
(F)
Notes:
1. Perform each inspection once per month (during cooling season) while unit is operating.
26
• Inspect the evaporator and
condenser coils for dirt and debris.
If the coils appear dirty, clean them.
• With the unit operating in the
cooling mode, check the suction
and discharge pressures and
compare them with the values
provided in "Pressure Curves".
Record these readings on the
"Maintenance Log".
• Observe indoor fan operation and
correct any unusual or excessive
vibration. Clean blower wheels as
needed.
Annually (Cooling Season)
The following maintenance procedures
must be performed at the beginning of
unit operation.
• Perform all of the monthly
maintenance inspections.
• With the unit operating, check unit
superheat and record the reading
in the "Maintenance Log".
• Remove any accumulation of dust
and/or dirt from the unit casing.
Evaporator
Entering air
Dry
Wet
Bulb
Bulb
Compressor
Suction
Discharge
Pressure
pressure
• Remove any accumulation of dust
and/or dirt from the unit casing.
• Remove corrosion from any surface
and re-paint. Check the gasket
around the control panel door to
condition to prevent water leakage.
• Remove corrosion from any surface
and re-paint. Check the gasket
around the control panel door to
condition to prevent water leakage.
• Inspect the evaporator fan belt. If it
is worn or frayed, replace it.
• Inspect the control panel wiring to
insure that all connections are tight
and that the insulation is intact.
Lubricate the indoor fan motor
bearings with a non-detergent,
20-weight oil. (To insure good bearing
lubrication, condenser fan motor
bearings should be lubricated once
every six months).
Note: Some motors are permanently
lubricated.
•
for leaks.
Superheat
Circuit
No. 1 (1)
Subcooling
Circuit
No. 1 (F)
TTA-R410A
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