Isolating The Compressor; Charging The System; Evacuating The System; Making A Partial Charge - Lincoln Continental 1964 Shop Manual

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FIG. 6-
Low Pressure
Service Valve Gouge Port
Adjust the fresh air bleed crank
so that the fresh air door is com-
pletely closed when the vents-heater
lever is at the OFF position (engine
running).
Adjust the evaporator shutter so
that the shutter is completely open
when the vents-heater control is at
the REC position. Also see bracket
adjustment instructions under ''Venti-
lating and Heating."
ISOLATING THE COMPRESSOR
To isolate the compressor from the
system, turn both the high and the
low pressure service valves to the ex-
treme clockwise position (Figs. 6 and
7).
Loosen the cap on the high
pressure service valve gauge port,
and
allo~
the gas to escape until the
compressor is relieved of refrigerant
pressure.
Loosen the cap a small amount
only, and do not remove it until
the pressure is completely relieved.
To connect the compressor back
into the system, evacuate the com-
pressor at the high pressure service
valve gauge port, close the vacuum
pump valve, turn both service valves
to the maximum counterclockwise
position, and cap the high pressure
service valve gauge port and service
valve stems.
DISCHARGING THE SYSTEM
Discharge the refrigerant from the
system. except the compressor. be~
fore replacing
any
part of the
sys-
tem.
PART 16-3-AIR CONDITIONING
To discharge the system, connect
the manifold gauge set to the system
(Fig. 5, Part 16-1). Do not connect
the manifold center connection hoses
to the Refrigerant-12 tank, or vac-
uum pump. Place the open end of
these hoses in a garage exhaust out-
let. Set the high pressure manifold
gauge valve at the maximum counter-
clockwise or open position. Open the
high pressure service valve a slight
amount (Fig. 7), and allow the re-
frigerant to discharge slowly from
the system.
Do not allow the refrigerant to
rush out, as the oil in the compres-
sor will be forced out along with it.
CHARGING THE SYSTEM
The procedure for charging de-
pends on whether a partial charge or
a complete charge is being made.
When a complete charge is to be
made, check for leaks first (See
"Diagnosis and Testing," Part 16-1 ) ,
then release the pressure and evac:u-
ate the system.
EVACUATING THE SYSTEM
Attach the manifold gauge set, a
tank of Refrigerant-12 and a vacuum
pump to the system (Fig.
8).
Make
certain that the Refrigerant-12 tank
valve is tightly closed. Set both serv-
ice valves to the mid-position. Open
both manifold valves (Fig. 8). Re-
lease any pressure in the system.
Open the vacuum pump valve and
run the pump until the low pressure
FIG.
8-Evacuating the System
FIG. 7
-High Pressure
Service Valve Gauge Port
16-15
gauge reads at least 25 inches, and as
close to 30 inches of vacuum as pos-
sible. Continue vacuum pump opera-
tion for 20 to 30 minutes to boil any
moisture out of the system. Close the
pump valve. Turn off the pump.
MAKING A PARTIAL CHARGE
Attach the manifold gauge set.
Open both manifold valves. Close
the vacuum pump valve. Open the
Regfrigerant-12 tank valve. Purge
the air from the high pressure hose
by loosening the high pressure hose
at the service valve for a few sec-
LOW PRESSURE SERVICE VALVE CENTERED
HIGH PRESSURE VALVE CLOSED K1545-A