STARTING AND STOPPING PROCEDURE
4 - 10
Heating and Air
Conditioning
Driver should always try to introduce as much
circulation of outside fresh air as possible without
hampering heating and air conditioning systems.
It should be remembered that the inside of vehi-
cle should always be slightly pressurized to
minimize the entrance of dust and moisture.
Driver's air conditioning system will operate si-
multaneously with the central air conditioning
system, while heating and defrost systems are
independent from the central system.
When the A/C system is running, make sure the
vehicle is parked at least 4 feet (1,2 m) from
other vehicles to allow a sufficient air flow
through the condenser core.
To operate air conditioning system when coach
is station, engine should run at fast idle. During
operation of air conditioning system, windows
should be kept closed and door not left open
longer than necessary.
In order to improve air circulation when A/C sys-
tem is inoperative, open the roof escape(s) (if
vehicle is so equipped) and position the
Recir-
culation & fresh air
control to the extreme right
position (fresh air).
18177M
1. Driver's A/C - heating
Recirculation & fresh
air
control
This knob should normally be rotated clockwise
to allow maximum fresh air admission. When
outside temperature is extremely high and
maximum cooling is required or when tempera-
ture is extremely low and maximum heating is
required, the knob should be rotated counter-
clockwise to shut off the fresh air admission, thus
recirculating the air inside vehicle.
Warning:
Keep in mind that the
Recirc.-fresh
air
control must be reset to the
fresh air
position
following these special road conditions in order to
prevent contamination of air in driver's section.
2. Main windshield
Defroster
control
This control is used to direct air flow in main
windshield defroster or dash louvers or both to-
gether. Turn control clockwise to increase air
flow in defroster, and counterclockwise to in-
crease air flow in dash louvers. Turn control to
center position to simultaneously direct air flow to
defroster and dash louvers.
3. Driver's A/C - heating
Temperature
control
When the
Central A/C - heating
switch is acti-
vated and fan is on, select the desired tempera-
ture by turning the
Temperature
control knob
clockwise to increase temperature or counter-
clockwise to decrease it. Only a slight movement
of knob is generally sufficient to change tem-
perature setting. At extreme clockwise position,
full heat will be maintained.
Once temperature is selected, system will auto-
matically maintain it within close limits.
Warning:
Excessive high temperature in
driver's zone could induce drowsiness, affecting
driver's ability to operate coach safely.
4. Driver's A/C - heating ventilation speed
control
Turn knob clockwise to the first position to obtain
minimum air flow and to start
Driver's heating
system
to circulate warm, cool, or outside air ac-
cording to settings of
Temperature
knob (driver),
A/C-heat
switch and
Recirc.-fresh air
control.
Turn clockwise again to obtain the desired venti-
lation speed.
