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AIRCONDITIONING
3. Install Refrigerant Service CanTapValve
Important
Do not open both the high and low hand valves
of the manifold gauge.
Press on the schrader valve on the side of the
manifold gauge set and expel the air from
inside the center hose.
HINT:
Press on the schrader valve until refrigerant
come out of it.
4. Inspect Refrigeration System for Leaks.
Note:
After evacuating the air in the system, check
the system for leakage.
a. Open the high pressure hand valve to charge
the system with refrigerant vapour.
Note:
When the refrigerant service can is placed
right side up, refrigerant will enter the system
as a
vapour.
b. When the low pressure gauge indicates 1 kg /
cm’ (14 psi, 98 kPa), close the high pressure
hand valve.
c. Using a gas leak detector, check the system
for leakage.
If a leak is found, repair the faulty component
or connection.
HANDLE
CONNECTION
CLOSED
PRESS
Fig. 51 - Normal condition
close
LO gauge
kg/cm2
14 psi 98
kPa
DISC
CLOSED
CLOSED
OPEN
( )
OPEN
Fig. 52 - Insufficient refrigerant