Owner's manual
Operation
65
Model 644E Rev. 8/03
To heat the cab:
• turn A/C switch (6) to
the OFF position,
• turn temperature control knob (7) to far right position
(RED = HOT),
• direct desired air flow by adjusting vent louvers,
• turn fan control (5) to position “3” (8) to assure rapid warm-up.
To defrost the cab:
• turn temperature control
knob (7) to the far right
position (RED = HOT),
• direct desired air flow by adjusting vent louvers,
• turn fan control (5) to position “3” (8) to assure rapid defrost.
To cool the cab:
• turn A/C switch (6) to the
ON position,
• turn temperature control
knob (7) to the far left position (BLUE = COOL),
• direct desired air flow by adjusting vent louvers,
• turn fan control (5) to position “3” (8) to assure rapid cool-down.
OS1950
OA1390
OS1960
OU0930
8
5
7
6