MacDon 9250 SP - Manual (Page 23)

Form # 46584 Issue 11/06 Web Rev_01 21
OPERATOR'S STATION
Cab Temperature Controls
NOTE: For access to circuit breakers, relays,
fuses and other electrical components in cab side
console, remove panel on window side of console.
BLOWER SPEED SWITCH (A) - Controls
operation of blower. Four positions are: OFF,
LOW, MEDIUM and HIGH. The blower recirculates
cab air as well as drawing in outside air to
pressurize the cab.
With door and window closed and blower on, dust
and dirt will be filtered out to keep cab interior
clean. Adjust louvers (B) (both sides of cab) to
direct air where needed, for example, to defog
window.
AIR CONDITIONING TEMPERATURE CONTROL
(D) - Air conditioning is OFF when control (D) is
turned fully counter-clockwise. Turning control
clockwise decreases cab temperature. Blower
switch (A) must also be turned ON before air
conditioning system will operate.
Regulate cab temperature with air conditioning
control and blower speed.
IMPORTANT: If humidity is high it may be
necessary to run blower at HIGH speed to prevent
evaporator freeze up.
HEATER TEMPERATURE CONTROL (E) -
Heater is off when control (E) is turned fully
counter-clockwise. Turning control clockwise
increases cab temperature. Regulate cab
temperature with heater control and blower speed.
NOTE: Heat and air conditioning systems are
independent of each other. To avoid working one
system against the other, be sure the system not
in use is turned OFF at the appropriate
temperature control, unless both are required to
defog windows. There is also a shut-off valve for
the heater circuit at the engine. Valve must be
open for heater to function. For maximum cooling
in hot conditions, close valve (G).
NOTE: If windows fog up, run the air conditioning
to dehumidify the cab air, plus the heater to control
cab temperature.
Windshield Wiper Control
Control windshield wiper using knob (F).
A
E D
F
CAB TEMPERATURE AND
WIPER CONTROLS
B
B
DIRECT AIR FLOW WITH LOUVERS
G
HEATER SHUT-OFF VALVE