3522.5-0000010 РЭ
200
The climatic installation starts to operate in conditioning mode at operating engine,
when by switch 1 (figure 2.4.1) are set required fan rpms and switch 2 is set in the begin-
ning of blue color scale.
Thereat through control circuit goes power to electromagnetic clutch of compressor
7 (figure 3.24.2). The clutch engages and transmits rotation from engine crankshaft pulley
to compressor shaft. The compressor pumps coolant through components of conditioning
system. Herewith the coolant absorbs heat of air passing through heater/cooler 5, then
give up heat in atmosphere through condenser 8.
The conditioning system can automatically keep the predetermined temperature,
that is set by turn of switch 2 (figure 2.4.1), which controls thermostat. At clockwise turn
the temperature falls and at contraclockwise turn the temperature rises. The protection
against critical conditions is ensured by pressure sensor and by thermostat. The sensor
switches off the system at excessive (more than 2,6+0,2MPa) or insufficient (less than
0,21±0,03 MPa) pressure. The thermostat switches off the system at excessive tempera-
ture fall in cooling section of radiators monobloque. The system capacity is adjusted by fan
rpms and thermostat. The compressor 7 (figure 3.24.2) can operate in this case either
constantly or cyclic.
Main parameters and technical data of cab air conditioning and heating system are given
in the table 3.8.
Table 3.8
Parameter description (data) Value
Cooling capacity, kW 6,4
Heating capacity, kW 8,7
Operating voltage, V 12
Electrical power consumption, W 260
Mechanical power consuption, kW 1,4 ... 8,0
Coolant R134a, ozone friendly
At irregular operation it is recommended for keeping the air conditioning system in
operating condition to switch on the system once in fifteen days in cooling mode (when the
outside temperature is above +15°C) for time of 15…20 min.
Irrespective of operating conditions it is necessary to check once a year the air con-
ditioning system operation in service station with a help of special equipment.
When the tractor is stored for a short time no preparatory works are needed for the
conditioning system. During short-term storage it is necessary to switch on the conditioner
once in fifteen days at operating engine for a time of 15…20 min. The air temperature in
tractor cab should be not lower than +20°С.
When the tractor is stored for a long time it is necessary to check the air condition-
ing system operation with a help of special equipment. If it is necessary to top up the cool-
ant. During storage no service works are made.
After long term storage it is necessary to make maintenance of conditioning system
in specialized service station with use of diagnostic equipment.
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