TM 9-4120-378-14
5.21 PRESSURE SWITCHES.- continued
Remarks
Action
L
Location/Item
Check for discontinuity across terminals.
Test (Electrical)
e.
Continued
f. If continuity does not exist, replace defective
switch.
g. Using nitrogen, pressurize high pressure cutout
switch (470-490 psig range/16.3-17.0 kg/cm2
range).
h. Check for discontinuity across terminals.
If continuity does not exist, replace defective pres-
i.
sure switch.
a. Insert ends of capillary tubes through hole in parti-
Installation
tion, being careful to avoid kinking tubes.
b. Install grommet (7) in the partition by sliding it over
both capillary tubes.
c. Connect capillary tube flare nuts (8) to fittings.
d. Install switches (3 and 6) and secure with two
screws (1 and 4) and two Iockwashers (2 and 5).
Keep excess capillary tubing coiled neatly without
kinks.
e. Connect electrical leads and remove tags.
f. Install mist eliminator bracket.
See paragraph 5.25.
g. Replace dehydrator.
See paragraph 5.7.
h. Leak test refrigerant system.
See paragraph 5.8.
Evacuate refrigerant system.
i.
See paragraph 5.9.
Charge system.
j.
See paragraph 4.25.
k. Install junction box.
See paragraph 4.20.
l. Install mist eliminator.
See paragraph 4.18.
m. Install evaporator inlet louver.
See paragraph 4.17.
n. Install top covers.
5-66
