Western Star 47X 2020, Maintenance Manual

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5. Install the HVAC cover in vehicles with 60-inch
and 72-inch sleepers or lower the bunk in ve-
hicles with 36-inch sleepers or install the front
center bunk partition by attaching the lower bunk
strut pivot and lower the bunk in vehicles with
48-inch sleepers.
83–03 Dual HVAC System
Inspection
Fuel-Operated Heater Check
1. Start the Dual HVAC System and set the control
knob to maximum heat. Run the heater for 15
minutes to achieve operating temperature, and
clear old fuel from the lines.
2. Verify that the unit completes the start-up cycle,
and continues to produce warm exhaust.
External A/C Condenser
Inspection and Cleaning
The Dual HVAC System A/C condenser is located on
the backwall of the sleeper. Inspect the condenser as
follows.
1. Check for debris in the condenser housing.
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1. Lower Cabinet Door 2. Carpet 3. Air Filter
Fig. 5, Sleeper HVAC Access Panel, 72-inch Sleepers (Similar for 60-inch Sleeper)
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1. HVAC Cover Panel 2. Air Filter
Fig. 6, Sleeper HVAC Access Panel, 48-inch Sleeper
Heater and Air Conditioner
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47X and 49X Maintenance Manual, August 2020
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