4-20
4.8.11
Electronic Expansion Valve (EEV),
Economizer Modulation Valve (EMV),
Discharge Modulation Valve (DMV)
Name Type
Electronic Expansion Valve
EEV
Coil
HCM-MD12DM-2
Socket (Red)
Body
HCM-BD35DM-2
Valve size: 3.5mm
Economizer Modulation Valve
EMV
Coil
HCM-MD12DM-3
Socket (White)
Body
HCM-BD24DM-1
Valve size: 2.4mm
Discharge Modulation Valve
DMV
Coil
HDM-MD120DM-4
Body
HCM-BD120DM-2
(1) Replacing the coil
①Remove the binding band fixing the coil leadwire.
②Disconnect the connector of the coil.
③Remove the metal fitting and the coil.
④Replace the old coil with a new one.
⑤Attach the coil and the metal fitting.
⑥Mount the connector of the coil.
⑦Fix the coil lead wire with a binding band.
(2) Replacing the body
①Remove the binding band fixing the coil leadwire.
② Detach the anti-condensation tube until the
curved part of the pipe.
③Remove the metal fitting and the coil.
④Remove the brazed part of the pipe.
⑤Insert the new valve body in the pipe.
→
Braze the new valve body while cooling it with a wet cloth.
Maximum body temperature: 120℃ (248F) or less
⑥Mount the coil and the metal fitting.
⑦Mount the anti-condensation tube.
⑧Fix the coil lead wire with a binding band.
Coil
Lead wire
Binding band
Main unit
Binding band
Anti-condensation tube
＜Part names＞
Metal fitting
Fixing pipe
Valve body
Coil
Metal fitting
＜Replacement of the coil＞
Correctly installed
＊ It clicks when installed.
Stopper
Fixing pipe
Wrongly installed
Metal fitting
＜Confirmation of metal fitting installation＞
Attention (When installing the
coil and the metal fitting)
● Securely attach the coil stopper to the
valve body fixing pipe.
→ If wrongly attached, the expansion
valve may function abnormally,
damaging the compressor.
● Take care not to allow the metal fitting
damage or pinch the lead wire.
→ Malfunction of the expansion valve
may arise.
Curved part of the pipe
Brazed part of the pipe
Anti-condensation tube
＜Replacement of main unit ＞
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