WARNING
Do not operate fuel-operated heaters in an area
where flammable vapors, including gasoline or
diesel fumes, are present, such as at filling sta-
tions and tank farms. Turn off a fuel-operated
heater and allow it shut down completely before
entering an area where flammable gases or liq-
uids are present. Heaters continue to operate for
up to three minutes after being turned off.
Failure to observe these precautions could cause
an explosion or fire, resulting in serious property
damage, and personal injury or death.
Parked HVAC
The Bergstrom NITE parked HVAC system consists
of a compact electrical 3000-BTU air-conditioning
system, and a diesel-fired heater unit. It is completely
self-contained, and runs on 12-volt deep-cycle batter-
ies located between the frame rails. The parked
HVAC batteries are isolated from the vehicle-starting
batteries, to prevent the starting batteries from being
drawn down during HVAC operation.
The A/C system is designed to maintain cool air in
the sleeper interior without having the engine run-
ning. However, 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 ve-
hicle A/C system until the desired sleeper tempera-
ture is achieved. This will help cool the sleeper to a
temperature that the parked A/C system can main-
tain. For optimal operation, the curtain between the
cab and the sleeper should be closed when using
the Parked HVAC A/C system.
The A/C unit is located under the lower bunk in the
sleeper compartment, and intakes air through a grille
located on the front panel of the lower bunk. The out-
let ducting runs from the left side of the unit to an
outlet on the back wall of the sleeper.
The heater unit is located next to the A/C unit. It in-
takes air through 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.
WARNING
Do not operate fuel-operated heaters in an area
where flammable vapors, including gasoline or
diesel fumes, are present, such as at filling sta-
tions and tank farms. Turn off a fuel-operated
heater and allow it shut down completely before
entering an area where flammable gases or liq-
uids are present. Heaters continue to operate for
up to three minutes after being turned off.
Failure to observe these precautions could cause
an explosion or fire, resulting in serious property
damage, and personal injury or death.
IMPORTANT: Blocked vents will hamper the op-
eration of the unit. Keep the area around the air
intake grilles clear of objects that may block air
flow, or emit objectionable odors into the HVAC
system.
Parked-HVAC Controls
The control panel for the parked HVAC is located on
the left side of the rear wall, in the sleeper. It has a
temperature-control dial, and a 4-position mode
switch. Turn the temperature-control dial to the left
for cooling, and to the right for heat. See
Fig. 7.6.
See Table 7.1 for a description of the mode func-
tions.
After using the system, turn the mode switch to the
OFF position, even if the unit is not running, or the
batteries may not charge properly.
Parked-HVAC Mode Operation
Mode Function
OFF Turns the unit OFF.
AUTO
Allows the unit to automatically heat or
cool the sleeper, depending on the
temperature setting and the sleeper
temperature. Adjusts the compressor,
heater, and fans to keep temperature
constant.
Heat Only
Allows only the heat portion of the system
to run. Adjusts the heater only to keep the
temperature constant.
A/C Only
Allows only the A/C portion of the system
to run. Adjusts compressor and fans only
to keep the temperature constant.
Table 7.1, Parked-HVAC Mode Operation
Climate Control
7.4
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