4-17
2. Replacement of body
(1) Remove the coil. Refer to the section 1.
"Replacing the coil" for removing procedure.
(2) Remove the heat insulator
q
for the SMV after
cut the binding band
w
.
(3) Heat up the brazed joint on the piping of SMV
body to disconnect the pipe at brazed section.
(4) Assemble piping of the SMV body, and conduct
brazing while keeping the temperature of lower
body of SMV below 120˚C (248˚F) by covering
the body with wet cloth.
Note) When brazing, to keep the temperature of
body, including value body, coil, lead
wire, etc. below 120˚C by supplying
water.
In this work, be sure to prevent water
from entering into the lead wire protection
tube.
(5) Install the heat insulator
q
and fasten it with
bandling band
w
.
(6) Install the coil. Refer to the section 1.
"Replacing the coil" for removing procedure on
the previous page.
w
Bandling band
q
Heat insulator
q
Heat insulator
Suction modulating
valve body
4.2.6 Drier
The drier automatically absorbs moisture in
the refrigerant while it is circulated. It also
commonly works as a filter to remove dust in
the refrigerant. Replace the drier if it does not
absorb moisture or if it is blocked. When
installing the new drier, follow the arrow and
do not make any mistake about the installation
direction of the drier
(1) Replacement procedure
q
Conduct
the automatic pump down
to
collect the refrigerant in the liquid receiver.
Refer to page 4-3 and 4-4 for the automatic
pump down.
w
Then, quickly replace the drier with a new one
after loosening the flare nuts on the inlet and
outlet side of the drier.
e
After completing of the replacement of the
drier, be sure to conduct refrigerant leakage
test to confirm that no refrigerant leakage is
occuring.
r
Check on the green colour of the liquid /
moisture indictor after system operation has
started.
t
Apply a sillicon sealant to the flare nut
section.
Adhere some anti-corrosion tape.
Flare nut
Flare nut
Quick joint
Seal using with
sillicon Sealant
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