Repair Section
92
(3) Checking vacuum
1) Leave the high pressure valve and the low
pressure valve of the gauge manifold closed for 5
minutes or more, and confirm that the gauge
pointer does not return to zero.
2) If the gauge pointer returns gradually to zero
there is a leak somewhere in the system (this
could also include gauge manifold). Perform leak
check according to procedure indicated in the
next step. Once leak has been found and
repaired, evacuate the system once more and
confirm the system holds vacuum.
ILL00085-00
Return
Pipe Brazing
LO
Closed
HI
Closed
Valve Setting
Pressure Gauge
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