Belarus 1221.2, Operator'S Manual

Page: 147 / 295

BELARUS-1221.2/1221 В .2/1221.3 Description and operation
146
General arrangement and operation of
the air conditioning and cab heating
system
The air conditioning and cab heat-
ing system is intended for creating and
maintaining the normal microclimate in
the tractor cab. The air conditioning sys-
tem consists of two circuits, the cooling
and heating ones. The schematic dia-
gram of the system is given below.
The cooling circuit includes the
compressor, condenser, drying filter with
the pressure sensor, monoblock of the
evaporator and radiator of the heater
(cooler-heater), fan of the cooler-heater,
connecting hoses with the complete set of
quick-release couplings, electric cables,
air filters, cold air control and fan switch.
The heating circuit is supplemented with
the hoses connected with the tractor en-
gine cooling system and cooler-heater.
Schematic diagram of air conditioning and cab heating
The components of the air conditioning system are arranges as follows:
- compressor – on the left of the semiframe, at the bottom;
- condenser – before the aftercooler radiator;
- drying filter – on the condenser frame;
- pressure sensor – on the drying filter;
- heater-cooler – under the roof, above the ventilation compartment panel;
- cold air control and fan switch – on the panel of the upper compartment;
- service valves – on the fittings near the compressor and drying filter.