DISASSEMBLY PROCEDURE
PHOTOS
89
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Photo 10-4
Refrigerant pipes
P-HEX
From the previous page.
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) Remove 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) Loosen 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) Remove the strainer valve, the water pump and the
pump valve (Refer to Procedure 5).
(13) Remove 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) Remove 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
Photo 10-6
Photo 10-7
Expansion vessel
Pipe (over B.H.)
P-HEX
Screw 7
Screw 6
Screw 3
Screw 5
W.C. top cover
P-HEX
Screw 2
Screw 1
Water coil
cover
Screw 4
Screw 8
Screw 9
Pump
stay
Screw 10
Screw 11
OCH570C
Summary of Contents for EHPT20X-MHCW
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