Ford Corsar Repair Manual page 788

DISCHARGING, EVACUATING, CHARGING AND CHECKING
UNION TYPE
R H A 2 7 9
PLATE TYPE
R
H A 2 8 0
Checking Refrigerant Leaks
ELECTRIC LEAK DETECTOR
The leak detector is a delicate device that detects small
amounts of halogen.
To use the device properly, read the manufacturer's manuals.
Also perform the specified maintenance and inspections.
GENERAL PRECAUTIONS FOR HANDLING LEAK
DETECTOR
Place the probe on connection fitting and wait for
5 seconds or
.
more.
To check cooling unit, wait for 10 seconds or more.
Keep the probe as still as possible for one more minute.
When testing single-bolt flange, place the probe on the
opposite side of the fitting.
MEASUREMENT STANDARD
If any leak is noted with a detector having a nominal
sensitivity of 15 to 25 g (0.53 to 0.88 oz)/year, that leak must
be repaired.
The nominal sensitivity of the detector is determined under
the assumption that all the leaking gas is collected by the
detector. Accordingly, the quantity of gas actually leaking
can amount to five to ten times the indicated value.
Generally speaking, leakage of 150 to 200 g (5.29 to 7.05 oz)
of refrigerant can cause insufficient cooling.
Oil deposited during assembling must be wiped off before
inspection. Refrigerant easily dissolves in oil, and the pres-
ence of oil can cause an error in measurement.
This precaution is important when checking a used car for
refrigerant leakage.
If oil is noted at or around connections, it indicates that
refrigerant is leaking.