147
Structural/Accessory Maintenance
Mounting Bolts
Check and tighten all unit, compressor, and fan
motor mounting bolts during pretrip inspections
and every 1,000 operating hours. Unit mounting
bolts should be tightened to a torque value of 204
N.m (150 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, compressor 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.
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.
1.
Tighten unit Mounting Bolts
2.
Tighten Compressor, Condenser Fan and
Evaporator Fan Mounting Bolts
Figure 49: Mounting Bolts
1
2
2
2
1
CAUTION: Air pressure or water spray
must not be high enough to damage coil
fins.
CAUTION: Air pressure must not be high
enough to damage coil fins.
Summary of Contents for CRR-40 119
Page 4: ......
Page 16: ...Safety Precautions 16...
Page 18: ...Service Guide 18...
Page 20: ...Model Features 20...
Page 32: ...Specifications 32...
Page 120: ...MP 3000a Controller 120...
Page 160: ...Wiring and Schematic Diagrams Index 160...
Page 161: ...161 MPC2000 Wiring Schematic...
Page 162: ...162 MPC2000 High Voltage Wiring Diagram...
Page 163: ...163 MPC2000 Low Voltage Wiring Diagram...
Page 164: ...164 MPC2000 WCC Wiring Schematic...