DISASSEMBLY PROCEDURE
PHOTOS
95
Nut
(G3/4")
Water
coil W
cover
Screw
Screw
Photo 17-1
Photo 17-2
17. How to remove the plate heat exchanger (P-HEX)
<Water - Water>
(1) Remove the front panel (Refer to Procedure 1).
(2) Drain water in the P-HEX (Water-Water) using the drain
cock (Primary circuit) and the drain cock (Sanitary
circuit). (Photo 17-1)
(3) Remove the 2 screws to remove the water coil W cover.
(Photo 17-1)
• Reuse the water coil W cover and the fixing screws.
(4) Remove the 4 G3/4" nuts.
• When reinstalling the
nuts
, use new G3/4" gaskets
.
(5) Remove the P-HEX (Water-Water) and drain cock
(Sanitary circuit). (Photo 17-2)
• When reinstalling the
drain cock (sanitary circuit), use a
new
one.
Gasket
(G3/4")
Nut
(G3/4")
Gasket (G3/4")
Drain cock
(Sanitary circuit)
Drain cock
(Primary circuit)
Nut
(G3/4")
Gasket (G3/4")
P-HEX (Water-Water)
Drain cock
(Sanitary circuit)
Nut
(G3/4")
Gasket
(G3/4")
18.
How to remove the water pump (sanitary circuit)
(1) Remove the front panel (Refer to Procedure 1).
(2) Disconnect the CNP4 connector and the earth cable in
the control box. (Photo 4-2)
(3) Release the water pump lead wire from the 2 cable
clamps and the cable strap in the control box, the 2
cable straps and the 3 bands below the control box.
(Photos 4-1 and 10-1)
(4) Remove the water pump (sanitary circuit) by removing
the two G1" nuts using the 2 spanners, one to hold the
G1" nut and the other to turn the other side of G1" nut.
(Photo 18)
• When reinstalling the G1" nuts, use a new G1" gaskets.
• Set the water pump in the orientation of the arrow
printed on the water pump and in the way that the
terminal box faces to the left. (Photo 18)
• Set the pump speed of the newly installed water pump
to " ". (Photo 18)
Photo 18
Nut (G1")
Gasket (G1")
Water pump
(Sanitary circuit)
Nut (G1")
Gasket (G1")
Terminal box
Flow
direction
Pump
speed:
P-HEX (Water-Water)
(inside)
OCH570C
Summary of Contents for EHPT20X-MHCW
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