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TM 5-4120-361-14
b.
Installation.
5-21.
Service Valves.
a.
Removal.
(1) Refer to figure 4-20 and re-
move charging valve box access cover.
1.
Caution should be exer-
cised with fluorocarbon re-
frigerant gas (freons) as they
can displace oxygen and there-
by cause suffocation.
2.
Personnel with a history
or other evidence of cardiac
rhythm abnormalities should be
made aware of the potential
for aggravation of existing
cardiac rhythm abnormalities
or the induction of arryth-
mias, as a result of exposure
to fluorocarbon refrigerant
gases (freons).
Such indivi-
duals should be evaluated by
local medical authorities be-
fore working in environments
where potential freon exposure
may occur.
(2) Refer to figure 6-1 and dis-
charge the refrigeration system.
(3) Refer to figure 5-6 and discon-
nect the service valve flare nuts.
(4) Remove four screws and pull
charging valve box outward as allowed by
the cutout switch wiring and capillary
tubes.
Take care not to damage the cap-
illary tubes.
(5) Remove service valve by remov-
ing mounting screws on side of charging
valve box.
(1) Refer to figure 5-6 and mount
service valve in charging valve box.
(2) Place charging valve box in
position and attach to housing.
(3) Attach refrigerant line flare
nut to service valve.
1.
Caution should be exer-
cised with fluorocarbon re-
frigerant gas (freons) as they
can displace oxygen and there-
by cause suffocation.
2.
Personnel with a history
or other evidence of cardiac
rhythm abnormalities should be
made aware of the potential
for aggravation of existing
cardiac rhythm abnormalities
or the induction of arryth-
mias, as a result of exposure
to fluorocarbon refrigerant
gases (freons).
Such indivi-
duals should be evaluated by
local medical authorities be-
fore working in environments
where potential freon exposure
may occur.
(4) Refer to para 5-6 and leak test
the system.
(5) Refer to figure 6-1 and purge
the refrigeration system.
(6) Refer to figure 6-2 and charge
the refrigeration system.
(7) Refer to figure 4-20 and in-
stall charging valve box access cover.
5-22.
High Pressure Cutout (HPCO) and
Low Pressure Cutout (LPCO) Switches.
NOTE
If new cap is installed on
valve, remove keeper and chain
to avoid chain contact with
cutout switch terminals.
a.
Removal.
(1) Refer to figure 4-20 and re-
move the charging valve box access
cover.
5-14
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