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Page Title:
EXPANSION VALVE (QUENCH).-Continued |
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 TM5-4120-384-14
5-23. EXPANSION VALVE (QUENCH).-Continued
(2)
Place
expansion
valve
in
unit
and
align
tubing
ends.
(3) Protect valve from
overheating during brazing operations.
Direct flame away from valve
body and wrap valve body with wet rag.
(4)
Braze
joints
in
accordance
with
(5) Secure valve to housing with
two
each
screws,
post
spacers, brackets, and lock nuts.
(6)
Replace
(See
(7) Leak test
all newly connected joints
and
all
tube
connections in the
area. (See para 5-14.)
(8)
Rewrap
insulation
at
expansion
valve
joints.
(9)
Install
sensing
bulb
in
bulb
well.
(a)
Insert approximately
one
ounce
of
thermal
mastic
in
bulb well.
s e n s i n g bulb
from
the
expansion
valve
into
bulb
(b)
Insert
well.
back and
forth
to
distribute
the
mastic.
(c)
Move
bulb
(d)
Set bulb about one inch (2.5 cm) beyond open end of
bulb well.
(10) (Models F18H-3S and F18H-1S) Install top rear cover
(Models F18H-3SA and F18H-3SB) Install top cover
(11) Evacuate and charge the refrigeration
system
in
accordance with paragraphs 5-15 and 5-16.
Change 2
5-52
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