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Page Title:
REFRIGERATION SYSTEM SERVICING - (LEAK TEST) - continued |
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 TM 5-4120-386-14
5-13. REFRIGERATION SYSTEM SERVICING - (LEAK TEST) - Continued.
REMARKS
ACTION
LOCATION/ITEM
NOTE
The electronic refrigerant gas
leak detector is highly sensitive
to the presence of a minute quant-
ity of gas in the air: Due to this
factor it is quite effective in the
detection of a small leak. However,
due to the rapid dispersion
of refrigerant gas into
the surrounding air, dif-
ficulty may be encountered
in pinpointing large leaks.
The detector must be used
in a well ventilated but
d r a f t - f r e e area.
If the soap solution testing method
is used, thoroughly rinse with fresh
water after testing is completed. A
residual soap film will attract and
accumulate an excessive amount of
dust and dirt during operation.
(2) Soap solutions. In this
method, a strong solution of
a liquid detergent and water
is brushed onto all points of
possible leakage while closely
watching for the formulation
of bubbles.
Testing procedures. To
c.
perform leak testing by use
of the electronic detector,
it is necessary that the
system be pressurized with
a proportion of refrigerant
gas. To perform leak testing
by use of the soap solution
method, the system may be
pressurized with dry nitro-
gen alone.
5-43
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