GE PTV15SAMR, Technician Service Manual

Page: 50 / 85

Page 50
XI. SPECIAL EDITION ON MAINTENANCE OF ENVIRONMENTAL PROTECTION
REFRIGERATOR
h. Open HB valve to discharge
the air until the high pressure
gauge reaches 1.0 kgf/cm 2 G,
then close HB valve at this
time.
i. Open LB valve to discharge the
air until the high pressure
gauge reaches 1.0 kgf/cm
2
G,
then close HB valve at this
time.
• In operating (8) & (9), be
sure to discharge the freon
from the system and at this
time, do not allow the air
get into the system. The
pressure must not be lower
than 1.0 kgf/cm 2 G.
HB
L H
Close the valve at pressure 1.0 kgf/cm G 2
L H
Close the valve at pressure 1.0 kgf/cm
LB
j. Lock the nut of connection
point A indicated in (7).
• Open CB valve slightly to
discharge the freon, then
close the purge in the tube
A.
.
k. Open VB valve of the vacuum
pump and then open LB and
HB valves slowly to extract
vacuum in the system (easing
the load of vacuum pump).
L H
CB
A
HB
1 2
L H
Open the valves by 1 2 sequence
LB
VB