Conditioner Control In A Heating Mode - Belarus 3522.5 Operator's Manual

ATTENTION: THE AIR CONDITIONER CAN BE SWITCHED ON AND OPERATE
ONLY WITH THE ENGINE ON!
To switch on the conditioner it is required to do the following:
turn the cut-out switch 2 (figure 2.4.1) clockwise to 180° until a blue scale be-
o
gins;
then turn the switch 1 to one of three marked positions (the fan rotor has
o
three kinds of rotation speed). After 3-5 minutes adjust a required temperature in the cab
with the switch 2;
it is possible to adjust a mixture of outer air and recirculation air with recircu-
o
lation shutters 7 (figure 2.1.1) located on the upper panel;
To switch off the conditioner it is required to turn both switches 1 and 2 (figure 2.4.1)
contraclockwise into "0" position.
ATTENTION: MAKE SURE THE CONDITIONER IS SWITCHED OFF BEFORE
STOPPING THE ENGINE!
ATTENTION: WHEN THE CONDITIONER OPERATES IN THE COOLING MODE
MAKE SURE THAT THE HEATER CONTROL VALVE IS SHUT OFF IN ORDER TO PRE-
VENT THE SYSTEMS OF HEATING AND COOLING FROM SIMULTANEOUS OPERATION!

2.4.2 Conditioner control in a heating mode

ATTENTION: REFILLING THE ENGINE COOLING SYSTEM SHALL BE CARRIED
OUT ONLY WITH LOW-FREEZING LIQUID SPECIFIED IN SUBSECTION 6.6 "REFILL-
ING AND LUBRICATION OF A TRACTOR WITH LUBRICANTS"!
To set the conditioner into the heating mode do the following:
- after refilling the cooling system with the cooling fluid start the engine and let the en-
gine run at medium idle without opening the heater control valve to reach 70-80°C of cooling
system temperature;
- then open the control valve with a handle 2 (figure 2.4.2), to do this turn the handle
2 contraclockwise against the stop;
- increase engine speed and let it run for one-two minutes until the heater radiator is
filled up with the fluid. Make sure the fluid circulates through the heater. The heater radia-
tor must warm up. Herewith the cooling fluid level in the cooling system radiator will de-
crease;
- refill the cooling fluid in the cooling system radiator through the filler of the expan-
sion tank. Refill till the cooling fluid level in the expansion tank reaches 50...60 mm below
the upper edge of the filler;
- to warm up the cab quickly switch on the heater fan and open recirculation shut-
ters;
ATTENTION: WHEN OPERATING IN THE HEATING MODE THE SWITCH 2 (FIGURE
2.4.1) SHALL BE COMPLETELY OFF TO PREVENT THE COOLING SYSTEM AND THE
HEATING SYSTEM FROM SIMULTANEOUS OPERATION!
1 – sun visor, 2 – handle of heater control valve; 3 – upper shield unit of button switches.
Figure 2.4.2 – Installation of heater control valve
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3522.5-0000010 РЭ