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TM 5-4120-361-14
stall
5-24.
a.
drier
(6) Refer to figure 4-4 and in-
top front cover.
D e h y d r a t o r.
General.
The dehydrator (filter-
is to be replaced whenever the
refrigeration system is opened for
maintenance.
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 individ-
uals should be evaluated by
local medical authorities be-
fore working in environments
where potential freon exposure
may occur.
b.
Removal.
(1) Refer to figure 6-1 and dis-
charge the refrigerant system.
(2) Refer to figure 4-4 and re-
move housing rear top cover.
(3) Refer to figure 5-7 and re-
move screws, washers and dehydrator
clamps.
(4) Unscrew flare nuts and remove
dehydrator.
c.
Installation.
(1) Refer to figure 5-7 and con-
nect dehydrator to refrigerant system
tubing by tightening flare nuts.
Use
sealing compound on screw threads.
(2) Attach clamps to dehydrator.
(3) Refer to para 5-6 and leak
test the refrigeration system.
(4) Refer to figure 6-1 and purge
the refrigeration system.
(5) Refer to figure 4-4 and in-
stall housing rear top 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 individ-
uals should be evaluated by
local medical authorities be-
fore working in environments
where potential freon exposure
may occur.
(6) Refer to figure 6-2 and
charge the refrigerant system.
5-25.
Liquid Line and Pressure Equal-
izing Solenoid Valves L1 and L2
a. General.
L1 and L2 are elec-
trically-operated valves, which close
when electrical power is applied to the
solenoid coils.
Both are alike, only
the usage is different.
L2 which opens
when the air conditioner is switched off
the cooling mode, allows low side and
high side pressures to equalize.
When
the air in the conditioned space has
lowered to the thermostat (S8) setting,
L1 opens allowing refrigerant to bypass
the expansion valve thereby discon-
tinuing cooling without shutting down
the compressor.
5-18
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