Mitsubishi EHST20C-VM2C Service Manual page 89

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DISASSEMBLY PROCEDURE
10. How to remove the plate heat exchanger (P-HEX)
(Refrigerant - Water)
(7) Remove the thermistor (TH2) from the thermistor pocket
(Refer to Procedure 20).
(8) R emove the manometer with the manometer cover
(Refer to Procedure 11).
(9) Loosen the flare nuts for Air vent (automatic) and
pressure relief valve (3 bar), and remove the Air vent
(automatic) and pressure relief valve (3 bar) together
with the flare joints. (Refer to Procedure 11)
(10) L oosen and remove the flare nut which connects the
expansion vessel. (Photo 12-1)
(11) Loosen and remove the flare nut on booster heater,
then remove the pipe. (over B.H.) (Photo 10-4)
(12) R emove the strainer valve, the water pump and the
pump valve (Refer to Procedure 5).
(13) R emove the nut (G1") on the B side of 3-way valve to
make the connection part free. (Photo 6-1)
• When reinstalling the nuts, use a new G1" gasket.
(14) Remove the booster heater (Refer to Procedure 8).
(15) R emove the water coil cover by removing the screw 1
to 5. Remove the W.C. top cover by removing the screw
6 and 7. Remove the pump stay by removing the screw
8 to 11. (Photo 10-5)
• Reuse these 3 plates and fixing screws.
(16) Pull out the P-HEX. (Photos 10-6 and 10-7)
Photo 10-5
Screw 6
Screw 5
Screw 3
W.C. top cover
P-HEX
Water coil
cover
Screw 2
Screw 1
Screw 4
Photo 10-7
Refrigerant pipes
OCH570C
Screw 7
P-HEX
89
Photo 10-4
Photo 10-6
P-HEX
Screw 11
Screw 10
Pump
stay
Screw 9
Screw 8
PHOTOS
Expansion vessel
Pipe (over B.H.)
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