BELARUS-1021/1021.3
Operating manual
43
3.17 Cab air conditioning and heating system control
The cab air conditioning and heating
system can be installed instead of the heater
fan on BELARUS-1021.3 tractors on request.
Climate system control in air conditioning
mode
The climate system control panel is in the
center of the upper panel of the cab. The
control panel has the switches (1) and (2).
\With the switch (1), you can adjust air
flow by changing fan speed. With the switch
2, you can change temperature of cold and
dry air going out of the deflectors in the air
conditioning mode.
Attention:
the air conditioner can be turned
on and operate only when the engine is
running
To turn on the conditioner, proceed as
follows:
- turn the switch (2) clockwise by 180°C to
the beginning of the blue scale;
- then turn the switch (1) to one of the three
marked positions (the fan impeller has three
speeds). In 3 to 5 minutes, use the switch (2) to
adjust the desired temperature in the cab;
- with the shutters located on the upper
panel, near to the operator's head, the mix of
external and recirculating air can be adjusted;
To turn off the air conditioner, turn both
switches (1) and (2) counterclockwise to “0”.
Attention:
when working in the cooling
mode, the heater valve must be closed to
prevent simultaneous operation of the air
heating and cooling systems.
Climate system control in heating mode
Attention:
refill the engine cooling system
only with an antifreeze agent.
For efficient operation of the heating
system, observe the following
recommendations:
1. After refilling the cooling system with
antifreeze agent, start the engine and, without
opening the valve, let the engine work at
medium speed to have the antifreeze agent in
the cooling system warmed up to 70 to 80° ,
after that open the valve, increase the engine
speed and let it work for 1 to 2 minutes to have
the heat exchanger filled with the agent. Make
sure that the antifreeze agent is circulating
through the heater. The heat exchanger must
warm up. The coolant level in the heat
exchanger of the engine cooling system will
drop at that.
2. Add coolant to the heat exchanger to the
required level (to the MAX. mar on the
expansion tank);
3. To have the cab quickly warmed up, turn
on the heater fan and open the recirculating
shutters;
4. To discharge the coolant from the
engine heater and cooling system, install the
tractor on an even surface. Remove the
extension tank plug of the engine cooling
system, open the valve on the cylinder block
in the rear part of the engine and disconnect
the heater hoses before the entry to the cab
posts.
Attention:
when working in the heating
mode, the switch (2) must be fully off to
prevent simultaneous operation of the air
heating and cooling systems.