Komatsu PC220LC -8 Operation & Maintenance Manual page 155

DETAILED CONTROLS AND GAUGES DETAILED CONTROLS AND GAUGES
3. Press RECIRC/FRESH selector switch (6) and set it to take in
fresh air.
4. Press temperature setting switch (3) and set temperature on
the display (7) monitor to maximum heating.
5. Adjust vents (A), (B1), and (B2) so that the air blows onto the
window glass.
(Vents (C) and (D) are fixed and cannot be adjusted.)
When operating in the rainy season or when it is desired to remove
the mist from the window glass or to dehumidify the air, turn air
conditioner switch (8) ON.
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OPERATION OPERATION