MCi Crusader II 1989 Maintenance Manual page 483

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MC-9 MAINTENANCE MANUAL
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Figure 16-12: Air Conditioning Condenser Coil
5. While observing air pressure gauge, turn adjusting
screw clockwise until the required 95 psi (655 kPa) reading
is reached. Tighten the lock nut.
6. Remove air pressure gauge and reconnect lines.
CONDENSER
The condenser compartment is located on the left side of
the coach, behind the front wheel housing and contains the
coil. fan and housing blower motor, receiver tank and
controls.
The condenser coil is mounted on the inner side of the
compartment door. Since the condenser's purpose is to
dissipate the heat from the hot refrigerant, it is important to
keep the cooling coils and fins clean. See figure 16-12.
Dirt and grease clogging the coil causes high head pres-
sure and reduced system efficiency. It is important to clean
the condenser coil regularly, preferably once a day, using
water under pressure directed at the inside surface of the
core.
Flush the condenser coil from inside out. using a water jet
or water mixed with air pressure. Direct the pressure
straight through the coil to prevent bending of fins.
For an extremely dirty coil. use Kelite 28 as a cleansing
agent. Mix with cold water and wash the coil. Rinse with
cold water.
CAUTION: Do not use a high pressure
water jet, steam or harsh soaps.
EVAPORATOR
The evaporator is located in the heating/cooling com-
partment behind the heater core (when viewing from front
baggage compartment). See figure 16-13. (The heater core
and fan assembly can be checked by opening the center
door in the front baggage compartment.)
The evaporator can be checked and cleaned by removing
the access panel at the rear of the condenser compartment
on the rear bulkhead. Periodic cleaning is required to
ensure full efficiency. The evaporator should be cleaned
with a cleansing agent not harmful to aluminum or copper.
Also keep the compartment seals in weathertight condition
to assure proper coach air circulation.
To remove the evaporator, it is necessary to remove the
fans and ducts, the heater core and then the evaporator and
frame as one assembly.
Figure 16-13: Evaporator and Heater Cores