Service manual

4-7
4.1.8 Solenoid valve
Two kinds of solenoid valves are employed for
the unit.
Coil is common and replacement procedure is
also almost the same for all types of valves.
NEV-803DXF
Fig. 1
NEV-202DXF
Fig. 2
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.
w Bandling band q Heat insulator

q Heat insulator
Suction modulating
valve body
Valve name Symbol Valve type Type of coil
Economizer
Solenoid valve.
ESV
NEV-202DXF
NEV-
MOAB507C
Injection Solenoid
valve.
ISV
Liquid Solenoid
valve.
LSV
NEV-803DXF
Discharge gas
by-pass Solenoid
valve.
BSV
Defrosting Solenoid
valve.
DSV
Hot gas Solenoid
valve.
HSV
Reheat Solenoid
valve.
RSV