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 TM5-4120-384-14
5-28. SERVICE (CHARGING) VALVES.-Continued
(5) (Models F18H-3S and F18H-1S)
Install
top
rear cover (para
4-11). (Models F18H-3SA and F18H-3SB)
Install
top
cover (para
(6) Evacuate and charge the refrigeration
system
in
accordance with paragraphs 5-15 and 5-16.
5 - 2 9 . PRESSURE RELIEF VALVE.
The pressure relief valve
is
located
in
the
rear
condenser) compartment.
a.
Removal.
(See
(1)
Disconnect
power
at
power
source.
(2) (Models F18H-3S and F18H-1S) Remove all three top covers
(para 4-11). (Models F18H-3SA and F18H-3SB) Remove top cover (para
(3) Discharge
and
purge
refrigeration
system
per
and 5-12.
(4)
Remove
screw,
lock
washer,
flat
washer,
and
loop
clamp.
(5) Use two wrenches, one to hold fitting and the
other
to
remove valve. Unscrew valve and remove it from unit.
Inspect
pressure
relief
valve
for
damage
b.
Inspect/Replace.
and replace if suspected
bad.
c.
Installation.
(1) Use two wrenches, one to hold fitting
and
the
other
to
tighten valve. Screw valve into fitting.
(2)
Secure
valve
with
a
screw,
lock
washer,
flat
washer,
and
clamp.
(3)
Replace
(See
(4) Leak
test
newly
connected
joints
and
all
connections
in
the
area.
(5)
Install
top
cover(s)
(6) Evacuate and charge refrigeration
system
in
accordance
with
paragraphs 5-15 and 5-16.
Change 2
5-64
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