CSR-20 & CSR-40, September 1999
Mounting Bolts
Check and tighten all unit, compressor, and fan motor mount-
ing bolts during pretrip inspections and every 1,000 operating
hours. Unit mounting bolts should be tightened to a torque
value of 163 N.m (120 ft-lb). Compressor and fan motor
mounting bolts should be tightened to a torque value of 20 to
21 N.m (15 to 20 ft-lb).
Unit Inspection
Inspect the unit during unit pretrip inspection and every 1,000
operating hours for loose or broken wires or hardware, com-
pressor oil leaks, or other physical damage which can affect
unit performance and require repair or replacement of parts.
Condenser Coil
Clean the condenser coil by blowing low pressure compressed
air or a medium pressure warm water spray from the inside of
the coil outward (opposite direction of normal airflow). Inspect
coil and fins for damage and repair if necessary.
CAUTION: Air pressure or water spray must not be
high enough to damage coil fins.
If a build up of salt or debris is present on the condenser
coil, the coil should be cleaned using a mild alkaline cleaner
with a pH of 9.5 to 10.5. For example, a 2-3% solution of
SIMPLE GREEN
®
would make a suitable cleaning solution.
Apply the solution using a pressure spray/wash type apparatus.
Spray the condenser coil thoroughly from both the inside and
outside of the coil. Always thoroughly rinse the coil with a
fresh water spray.
Also inspect the directional airflow condenser grille for
damage. This grille directs the condenser airflow out and
away from the unit to increase the efficiency of the condenser
coil by preventing the recirculation (short cycling) of warm air
through the coil. Abnormally high head pressures may result
if this special condenser grille is damaged or missing.
Evaporator Coil
Clean the evaporator coil by blowing low pressure compressed
air from the bottom side of the coil upward (opposite direction
of normal airflow). Inspect coil and fins for damage and repair
if necessary.
CAUTION: Air pressure must not be high enough to
damage coil fins.
7
Structural/Accessory
Maintenance
Mounting Bolts
1.
Tighten Unit Mounting Bolts
2.
Tighten Compressor, Condenser Fan and
Evaporator Fan Mounting Bolts
1
2
