Parked Hvac - freightliner Columbia Driver Manual

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06/21/2001
1. Fan Switch
2. Temperature Control Switch
Fig. 4.5, Sleeper Climate Control Panel
switch counterclockwise or to the blue area for cool
air.
The air conditioner automatically turns on when nec-
essary to maintain the selected temperature in the
sleeper. If the sleeper air conditioner automatically
turns on when the cab air conditioner is on, the cab
air conditioner fan speed and temperature settings
will override the sleeper air conditioner settings.
The CDTC system is disabled when the temperature
control switch is in the maximum cool or maximum
warm positions.
The bunk override switch allows the driver to re-
motely control the temperature and fan speed set-
tings in the sleeper. The bunk override mode can be
canceled by changing the sleeper fan speed or tem-
perature setting. After the override mode is canceled,
the sleeper heater and air conditioner system will
operate from the sleeper fan speed and temperature
settings and the amber indicator on the switch will be
off.

Parked HVAC

The parked HVAC system consists of a compact
electrical 3000-BTU air conditioning system, and a
diesel-fired heater unit.
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f610503
Heater and Air Conditioner
Overview
The Bergstrom NITE (No Idle Thermal Environment)
parked, or no-idle, air conditioning system is a com-
pact, electrically powered, 3000-BTU system. It is
designed to provide a means of air conditioning to
the sleeper area without having the engine running. It
is completely self-contained, and runs on 12-volt
deep-cycle batteries. The system is designed to
maintain cool air in the sleeper interior. For optimal
operation, the curtain between the cab and the
sleeper must be closed when using the A/C system.
The parked A/C unit will not cool down a hot sleeper
that has been sitting in the sun without the vehicle
A/C running. If the interior temperature is higher than
desired, start the engine and run the vehicle A/C sys-
tem until the desired sleeper temperature is
achieved. This will help cool the sleeper to a tem-
perature that the parked A/C system can maintain.
Once the sleeper temperature is lowered, the system
will maintain a comfortable setting.
The A/C unit is located under the lower bunk in the
sleeper compartment. The unit gets its intake air
from the under-bunk area through a grate in the top
panel. An air intake grille is located on the front panel
of the lower bunk. The outlet ducting runs from the
left side of the unit to an outlet near the bunk occu-
pant's face on the back wall of the sleeper. It is im-
portant to keep the air intake grille, and the area
under the bunk, free of objects that might block air
flow or put objectionable odors into the cooling air.
Air for the condenser is taken in from under the cab
and exhausted through another opening in the cab
floor.
The system receives power from four deep-cycle bat-
teries located between the frame rails. These batter-
ies are completely isolated from the starting batteries
to keep the starting batteries from being drawn down
during operation.
The heater unit is located under the lower bunk in
the sleeper compartment next to the A/C unit. The
unit gets its intake air through a duct attached to a
grille located on the right side of the front panel of
the lower bunk. The outlet ducting runs from the
back of the unit to a grille on the left side of the front
panel of the lower bunk.
Operation
IMPORTANT: Before operating the Parked
HVAC system, make sure that the intake and
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