HEXA

HVAC

E. CONDENSER AND RECEIVER DRIER

CONDENSER

The condenser is a heat exchanger used to cool the

hot vapourised refrigerant. Also the refrigerant

changes its state from vapour to liquid. The conden-

ser in this vehicle, as in many other vehicles is

placed in front of the radiator behind the radiator is

the fan used to draw in ambient air.

CONDENSER SEALING DUCTS

Sealings are used to guide the flow of the air to the

condenser and also to avoid the hot air recirculating

from the engine compartment to the condenser.

RECEIVER DRIER (R.D)

The receiver drier is integrated into the Condenser

and has three main functions.

i) It absorbs the moisture in the refrigerant.

ii) It allows only liquid (

high pressure liquid)

to pass

through to the TXV.

iii) It keeps a reserve of refrigerant to accommodate

fluctuating refrigerant requirements.

F. THERMISTER OR THERMO SENSOR

NOTE

To remove thermister from the HVAC unit, the HVAC

assembly needs to be dismantled.

It is a temperature sensing device, which is posi-

tioned at the coldest point of the evaporator

(as

shown in the fig below)

. The control unit switches

OFF the compressor at a temperature when con-

densed water tends to form ice on the fins of

evaporator. Thus it maintains the evaporator tem-

perature within a specified range.

THERMISTER POSITION ON EVAPORATOR

The thermister bulb should be fixed such that the

sensing bulb is right over the point as shown figure

above. This point in this vehicle’s front evaporator is

fixed at a point as given in the figure above.