4-18
4.2.7 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.
VPV-803DQ
Fig. 1
NEV-202DXF
Fig. 2
Valve name Symbol Valve type Type of coil
Economizer
Solenoid valve.
ESV
NEV-202DXF
NEV-
MOAB507C
Injection Solenoid
valve.
ISV
Discharge gas
by-pass Solenoid
valve.
BSV
Liquid Solenoid
valve.
LSV
Defrosting Solenoid
valve.
DSV
Hot gas Solenoid
valve.
HSV
Reheat Solenoid
valve.
RSV
(1) Replacing the coil
q Remove the lead wire connector from the inside
of the control box, and cut and recover the binding
band which fastens the lead wire.
w Remove the hexagonal head bolt on the top of the
coil to pull the coil out.
e Replace the coil with a new one and restore the
hexagonal head bolt, the binding band and
connector on the original position.
When reassembling the coil, the tightening torque
should be 1.2 N m (12.2 kg cm).
(2) Replacement of valve body
q Remove the hexagonal head bolt on the top of the
coil to pull the coil out.
w Remove the hexagonal head bolt of the fixing
plate, and cut the two pipes at the side of the
valve body.
Disconnect the remaining pipes at the brazed joint
sections.
e Insert the new valve body into the pipe and
conduct brazing while keeping the temperature of
the valve body below 120 ˚C (248 ˚F) by cooling.
r Install the coil and restore the hexagonal head bolt
of the fixing plate and the connector into their
original position.
w Hexagon
head bolt
e Coil
q Lead wire
r Valve body
t Hexagon head
bolt for fixing plate
q Hexagon
head bolt
w Coil
e Valve body
r Fixing plate
VPV-803DQ
04LXE10E-A(9-24)07.2.1918:50ページ4-18
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