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A/C SYSTEM
1.
Refrigeration
A. Close the heater water valve; (Fig. 65)
B. After the engine working normal, turn the blowing rate
switch to the proper position;
C. Rotate the temperature control switch to the proper po-
sition (Green indicator lit up), and the refrigeration sys-
tem starts working and the cooled air begins to be sent
out from the air outlet;
D. You may adjust the temperature of the cooled air by ad-
justing temperature control switch.
2.
Heating
A. After the engine working for a moment, turn the blowing
rate switch to the proper position;
B. Rotate the temperature control switch counterclockwise
to the leftmost position, and the heating system starts
working and the hot air begins to be sent out from the
air outlet
3.
Hot water valve
The heating function of A\C system is realized by emitting
heat through circulation of the coolant from engine to ra-
diator. There are two hand hot water valves installed on
water inlet and water return port connected to engine and
radiator.
In normal operation, these two hand valves shall be at the
OPEN position (i.e., the direction of handle of the valve is
in line with the run of the pipeline). In case of repair due
to the fault in A\C system, you should first close the two
hot water valves (i.e., the direction of handle of the valve
is perpendicular to the run of the pipeline) to prevent the
engine coolant from being lost. When changing engine
coolant, you should open the hot water valve and solenoid
valve to change the coolant in the radiator also, and guar-
antee the correct liquid level of the engine coolant.
When the ambient temperature is lower than 0 º and the en-
gine is not working, If there is no anti-freeze fluid filled into
the engine coolant, you should empty the engine water tank,
and, at the same time, open the hot water valve and solenoid
valve to drain out the coolant in the radiator, otherwise the ra-
diator will be frost cracked due to too low temperature of the
radiator pipeline!
WARNING
Fig 63
Fig 64
Operation Controls 2-31
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