1975 Datsun 280z FSM - Spooled up Racing

Air Conditioning
RECEIVER DRIER
The receiver drier serves the purpose
of storing the liquid refrigerant.
The amount of the liquid refrigerant
flowing through the system varies with
the operating condition of the air
conditioner. To be accurate, the receiver
drier stores excess amount of
refrigerant when the heat load is lowered.
It also releases stored refrigerant
when additional cooling is needed,
thus maintaining the optimum flow of
refrigerant within the system.
The receiver drier includes a strain^
er and desiccant. They have the job of
removing moisture and foreign particles
as the refrigerant circulates within
the system.
The pressure switch is installed
beside sight glass of receiver drier. The
purpose of the switch is to stop the
compressor operation in the event an
excessive system pressure builds up on
the high pressure lines.
1 Pressure switch
2 Sight glass
3 Strainer
4 Desiccant
To expansion valve
AC540
Fig.AC-4
Receiver drier
EXPANSION VALVE
The expansion valve restricts the
flow of liquid refrigerant as it passes
through it and delivers sprayed refrigerant
to the evaporator for facilitating
refrigerant evaporation.
The refrigerant within the thermo
bulb changes in pressure through the
super heat condition of vaporized refrigerant
gas which comes out of the
evaporator, causing the deflection of
the diaphragm. The lift of the ball
valve attached to the diaphragm is
changed by the deflection of the diaphragm,
thus controlling the amount
of refrigerant passing the orifice.
To compressor
To evaporator
From evaporator
^, ^p K. syQ
To evaporator
/ ^ ^ »
u ^
From receiver drier
1 Valve housing 4 Valve ball
2 Thermo bulb 5 Valve body
3 Diaphragm 6 Orifice
AC-5
7 O-ring
8 Equalizer
Fig. ACS
AC231
Expansion valve