Komatsu PC22MR-3, Operation & Maintenance Manual

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USING THE MACHINE IN THE COLD SEASON
FUNCTIONING
3-106
CAB VENTILATION AND COOLING 3
The ventilation and heating of the cab serve to reduce the
operator’s stress both in summer and in winter; these functions
also serve to eliminate condensate from the front windshield,
thus ensuring visibility during both work and travel. Ventilation
and air exchange are obtained with a three-speed fan
controlled by the switch (2).
The air intake is protected by a filter placed on the right side of
the cab while the distribution is obtained with a series of
adjustable outlets with adjustable flow (1) both for the internal
flow, and the flows used for de-icing and anti-fogging of the
glass.
Together with the fan, there is a radiator that transfers heat to
the air sent into the cab; it is used during the cold season and
receives the hot water necessary for exchange heat directly
from the engine cooling system.
The water flow is limited or interrupted by a cock controlled by
the knob (3). Turning the handwheel clockwise to increase the
hot water flow intensity.
Cab ventilation 3
Ventilation is turned on by turning the switch (2) located on the
right side instrument panel. Turn the switch clockwise to
increase ventilation.
Cab heating 3
To use the cab heating system, open the valve (4) on the water
manifold, turning it counterclockwise.
REMARK
When the heating system is going to remain unused for a long
period, close the valve (4) turning it clockwise.
RKA34050
WEAM014500