speed, even with the fan switch in the off posi-
tion. This prevents ice from forming on the
evaporator, especially during humid weather.
2.
Turn the temperature control switch all the way
clockwise to heat. Turn the fan switch to position
3. See
Fig. 4.8
.
3.
When the sleeper compartment heats to the de-
sired temperature, turn the temperature control
switch counterclockwise to adjust outlet air tem-
perature. Then, turn the fan switch to adjust the
air flow level.
The system will automatically maintain the se-
lected outlet air temperature.
4.
When heat is not desired, turn the temperature
control switch counterclockwise and turn the fan
off.
IMPORTANT: To prevent the buildup of fumes or
odors inside the sleeper (for example, from
smoking)
do not operate the heater and air con-
ditioning system in a recirculation mode for
more than 20 minutes.
Air Conditioning, Sleeper Heater and
Air Conditioner
1.
Turn on the cab air conditioner (refer to "Air Con-
ditioning") and set the bunk fan switch on the
cab climate control panel to the middle position.
See
Fig. 4.7
.
When the bunk fan switch in the middle position,
full control is given to the sleeper heater and air
conditioner climate control panel. The bunk fan is
off when the bunk fan switch is in the OFF posi-
tion. The bunk fan is on high when the bunk fan
switch is in the HI position.
2.
Turn the temperature control switch on the
sleeper climate control panel all the way counter-
clockwise to cool. Turn the fan switch to position
3. See
Fig. 4.8
.
3.
When the sleeper compartment cools to the de-
sired temperature, turn the temperature control
switch clockwise to adjust outlet air temperature.
Then, turn the fan switch to adjust the air flow
level.
The system will automatically maintain the se-
lected outlet air temperature.
4.
When air conditioning is not desired, turn the
temperature control switch clockwise and turn
the fan off.
IMPORTANT: To prevent the buildup of fumes or
odors inside the sleeper (for example, from
smoking)
do not operate the heater and air con-
ditioning system in a recirculation mode for
more than 20 minutes.
NOTE: Whenever the refrigerant compressor is
operating, the fan will always run at a very low
speed, even with the fan switch in the off posi-
tion. This prevents ice from forming on the
evaporator, especially during humid weather.
Parked HVAC
The parked HVAC system consists of a compact
electrical 3000-BTU air conditioning system, and a
diesel-fired heater unit.
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
Heater and Air Conditioner
4.8