MacDon M100 SP Operators Manual - Manual (Page 24)

OPERATOR’S STATION
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Rev. C
5.10 CAB TEMPERATURE
The cab environment is controlled by a climate-
control system that provides clean air-
conditioned or heated air for the operator. The
heater/evaporator/blower assembly is located
under the cab floorboard and is accessible from
beneath the windrower.
5.10.1 Controls
Refer to the following illustrations for an
explanation of the controls and operating
procedures.
IMPORTANT
To distribute the oil throughout the
system, perform the following steps
whenever the machine is first started after
storage for more than one week:
a. Ensure heater shut-off valve at engine is open.
See 5.10.3 Heater Shut-off Valve.
b. Turn blower switch to the first position, turn
temperature control switch to maximum heating,
and A/C control to “OFF”.
c. Start engine and operate at low idle until engine
is warm.
d. Click A/C switch from "OFF" to "ON" for one
second, then back to "OFF" for 5 to 10 seconds.
Repeat this step ten times.
5.10.2 Air Distribution
Cab air distribution is controlled through
adjustable air vents. They are located in the cab
posts to provide window and operator ventilation
as shown in illustration.
5.10.3 Heater Shut-Off Valve
A shut-off valve at the engine allows the cab
heater to be isolated from the engine coolant.
The valve must be open to provide heat to the
cab but for maximum cooling, the valve can be
closed.
HEATER SHUT-OFF VALVE
OPEN – Counterclockwise
CLOSE - Clockwise
TEMPERATURE CONTROL
Controls Cab Temperature
INCREASE – Clockwise
DECREASE - Counter-Clockwise
BLOWER SWITCH
Controls Blower Speed
OFF/LO/MEDIUM/HI
AIR CONDITIONING SWITCH
Controls A/C System
OFF - A/C Does Not Operate.
ON - A/C Operates With Blower
Switch On.
OPEN
CLOSE
DIRECTION