Air-Conditioning Unit Control; Air-Conditioning Unit Control In The Air-Conditioning Mode; Air-Conditioning Unit Control In The Heating Mode - Belarus 921.6 Operator's Manual

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2.5 Air-conditioning Unit Control

Switches 1 and 2 are installed on the air-conditioned control panel (Figure 2.5.1).

1 – airflow rate adjustment switch; 2 – air-conditioned switch and cooling capacity

adjustment.

Use the switch 1 to change an airflow rate by the fan rotation speed adjustment.

Use the switch 2 to change the temperature of a cooled and dried air, which is fed from the

deflectors 1 (Figure 2.4.1) in the air-conditioning mode.

ATTENTION: THE AIR-CONDITIONING UNIT CAN BE ACTIVATED AND OPER-

ATE ONLY WHEN THE ENGINE OPERATES!

To start the air-conditioning unit, proceed as follows:

- rotate the switch 2 (Figure 2.5.1) clock-wise by ≈180° up to the point, where the

blue dial starts;

- then rotate the switch 1 into one of the three marked positions (the fan's rotor has

three rotation speeds). After 3-5 minutes, use the switch 2 to adjust the required tempera-

ture in the cab;

- the recirculation flaps 8 (Figure 2.4.1) can be used to adjust mixing the environ-

ment air with the recirculated air.

To turn the air-conditioner off, rotate both switches 1 and 2 (Figure 2.5.1) counter-

clockwise into the position 0.

ATTENTION:PRIOR TO THE ENGINE STOPPING, MAKE SURE THAT THE AIR-

CONDITIONER IS OFF!

ATTENTION: THE HEATER VALVE SHALL BE CLOSED WHILE OPERATING IN

THE COOLING MODE IN ORDER TO PROVIDE FOR SIMULTANEOUS OPERATION

OF THE AIR HEATING AND COOLING SYSTEMS!

ATTENTION: THE ENGINE COOLING SYSTEM SHALL BE FILLED ONLY WITH

THE LOW-FREEZING LIQUID, WHICH IS STATED IN SUBSECTION 6.7 "THE TRAC-

TOR FILLING AND LUBRICATION WITH THE FUEL AND LUBRICANTS"!

To operate the air-conditioner in the heating mode, proceed as follows:

- start the engine and with the heater valve closed let the engine run at the interme-

diate rotation speed in order to warm the cooling fluid in the cooling system up to the tem-

perature within range from 70 °С to 80 °С;

- then open the heater valve using the handle 2 (Figure 2.4.1), for this purpose it is

necessary to rotate the handle 2 counter-clockwise up to the stop;

Figure 2.5.1 – Air-conditioner control panel

921.6-0000010 OM

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