"Gazelle" Gas-2705>> Car body>> Heating and body ventilation>> Features of system of heating and ventilation of motor vans ГАЗ-2705 of "Kombi" and buses

Fig. 10.25. The Control panel heating and ventilation




In system of heating of the specified cars the electropump providing increase of the expense of a liquid in system that improves cabin warming up is applied. The electropump is established in a drain highway of system of heating under a cowl, on the right longeron. Electropump inclusion is carried out by switches 2 and 4 (fig. 10.25 see) on control panel ОВУ. For electropump inclusion it is necessary to establish the handle 2 in one of three positions and to include the crane of a heater turn of the handle 4 (clockwise) from extreme left position. In operation the electropump of service does not demand.
The electropump is not subject to repair; at failure it is necessary to replace it. Electropump breakage worsens work (теплоотдачу) ОВУ, but does not interfere with liquid circulation in system.
In system of heating of motor vans of "Kombi" and buses the additional heater also is applied.
It is located: in buses on 6 places and motor vans of "Kombi" on a floor for (or under) a passenger seat of a cabin; in buses on 10 places — on a floor under a seat in a forward part of passenger salon.
The device of an additional heater is shown on fig. 10.27. The radiator 3 additional heaters is consistently connected to a radiator of the basic heater hoses. The additional heater works in a mode of use of internal air. Numerous passage of internal air through a radiator of an additional heater provides high intensity of warming up of cabin ГАЗ-2705 of "Kombi" or salon of buses.
The fan of an additional heater has three speeds of rotation. Fan inclusion is carried out by the handle 3 (fig. 10.25) a regulator of quantity of air arriving in salon of cars. The regulator handle has four positions:
- It is included;
- The minimum productivity of the fan;
- Average productivity of the fan;
- The maximum productivity of the fan.
Cabin ventilation
Compulsory forced ventilation is carried out similarly specified for motor vans with one row of seats (at the closed windows боковин bodies of buses and the closed hatch of a roof).
Exhaust ventilation is carried out through cracks on internal panels in the bottom part of doors of a cabin, through the roof hatch, and also through ventilating apertures on back racks боковин buses and a window.
The electric motor of the fan of an additional heater
The fan of an additional heater results in rotation the bipolar electric motor with excitation from constant magnets.
Electric motor technical characteristics
Type..... 197.3730
Capacity, Vt..... 60
Consumed current strength at loading the fan, no more, А.... 8,5
Frequency of rotation of an anchor at loading the fan, mines-1..... 3800
Axial люфт a shaft, no more mm..... 0,8
Maintenance service and repair of an additional heater
Service of an additional heater consists in its periodic survey.
At подтекании a cooling liquid in places of connections of hoses it is necessary to tighten collars of hoses. Podtekanie liquids from a casing of a radiator of a heater testifies about негерметичности a radiator; in this case it is necessary to remove and repair or replace it.
Radiator removal is made in a following order:
- To merge a part of a cooling liquid from system of cooling of the engine (nearby 5);
- To disconnect hoses from tubes of a radiator of an additional heater and to merge the rests of a cooling liquid;
— To turn away two screws of fastening of a plastic protection and to remove a protection;
- To disconnect two spring скобы 4 (fig. 10.27) and to uncover 1 casing;
- To take out a radiator 3 of a casing 2.
The removed radiator is necessary for checking up on tightness in a water bath at superfluous pressure 1 атм. Негерметичность a radiator to eliminate поджатием отгибочных short moustaches as it is specified for a radiator of the basic heater.
The electrofan does not work
If at heater inclusion the electrofan does not work or works with the raised noise, it is necessary to be convinced of serviceability of the electric motor and reliability of fastening of the fan.
Electrofan removal make in a following order:
- To remove a heater protection;
- To turn away four bolts of fastening of a cap 8 (fig. 10.27 see) air line to a casing 2 heaters;
- To take out the electric motor 9 with the fan 6;
- To remove the fan 6 from the electric motor, having turned out two screws 5.
To examine the fan and in case of presence of cracks, having chopped off etc. To replace it.