PREVOST X3-45 COMMUTER User Manual

SECTION 22: HEATING AND AIR CONDITIONING
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
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3. HVAC SYSTEM BASIC MAINTENANCE
Basic maintenance required on the passenger’s
and driver’s units consists in cleaning their
respective coils and cleaning or replacing air
filters.
However, periodic inspection for broken drains,
hoses and charging of the system should be
done.
MAINTENANCE
Squeeze rubber discharge tubes located
underneath the appropriate compartment to
eliminate the accumulated water
and dirt
every three months.
3.1 COIL CLEANING
Check the external surface of the coils at regular
intervals for dirt or any foreign matter.
3.1.1 Driver’s Unit
MAINTENANCE
Once a year, gain access to the driver’s unit,
remove the coil access panel (Figure 5) and
clean the driver’s unit evaporator and heater
coils with low-pressure air jet, taking care not to
damage fins. Clean the bottom of the defrost
plenum.
For the optional windshield upper section
defogger/defroster, remove the bottom access
panel, remove the six bolts fixing the blower
motor assembly. Use low air pressure to clean
the coil.
FIGURE 5: DRIVER'S UNIT AIR FILTERS 22171
3.1.2 Passenger’s Unit
MAINTENANCE
With the air filters previously removed, clean
the passenger’s unit evaporator and heater
coils with low air pressure or a stream low-
pressure water once a year.
Do not use a
pressure washer as this will damage the fins.
Remove the air filter and brush the evaporator
coil from behind.
Once a year, clean the condenser with low-
pressure air jet or a stream of low-pressure
water, taking care not to damage fins (Figure 7).
CAUTION
Direct the pressure straight through the coil to
prevent bending of fins an
d do not use
extremely high pressure. Do not use hot
water, steam or caustic soap.
FIGURE 6: EVAPORATOR COIL CLEANING WITH LOW-
PRESSURE AIR JET
22373

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in