Mack Granite GU Series, Operator'S Handbook Manual

Page: 100 / 317

INSTRUMENTS AND CONTROLS 89
SLEEPER CLIMATE CONTROL
C0029220
1. Fan Control Knob 3. Temperature Control Knob
2. Mode Selection Knob
1. Fan Control Knob — This is a three position knob to control the amount
of air delivered through the sleeper box air vents.
2. Mode Selection Knob — Allows the operator to choose between OFF,
HEAT or A/C.
3. Temperature Control Knob — Controls the temperature of the air in the
sleeper from COOL (far left) to HOT (far right).
Note: When the sleeper mode selection knob is in the OFF position, warm air flows
out the sleeper box air vents. As a result, the sleeper may become quite warm and
uncomfortable on hot summer days.
To use the sleeper box air conditioner, make sure that the Cab air conditioning
unit is activated and the cab fan control switch must be ON (any speed). Then,
on the sleeper climate control panel, move the mode selection knob to the A/C
position and turn the temperature control knob to COOL.
If the sleeper box becomes too cold and you want to regulate the temperature,
the cab air conditioning unit must be activated and the fan switch turned ON to
any speed. Then, turn the sleeper mode selection knob to HEAT, then use the
temperature control knob to adjust to the desired temperature.