Mitsubishi EHST20C-VM2C Service Manual page 96

DISASSEMBLY PROCEDURE
19. How to remove the scale trap (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 4-1)
(3) R elease 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 P-HEX (Water-Water) (Refer to Procedure
17).
(5) R emove the 3 screws and the plate (under P-HEX
(W-W)). (Photo 19-1)
(6) R emove the pipe (Tank - P-HEX (W-W)) by removing the
G3/4" nut. (Photo 19-1)
• When reinstalling the G3/4" nut, use a new G3/4" gasket.
(7) R emove the G3/4" nut and quick connection clip from the
pipe (W.P. - Tank). (Photo 19-2)
• When reinstalling the G3/4" nut, use a new G3/4" gasket.
(8) R emove the screw which fixes the S.T. support. (Photo
19-3)
• I f there is not enough space to use a screw driver,
rotate the pipe (W.P. - Tank) forward with a use of the
quick connection part as a fulcrum.
(9) Remove the 2 screws (Right side). (Photos 19-1 and 19-2)
(10) R emove the scale trap with the water pump, pipes and
the S.T. support. (Photo 19-4)
(11) Remove the G1" nut, the screws and the saddle band,
then remove the scale trap. (Photo 19-4)
• W hen reinstalling the G1" nut, use a new G1" gasket.
• R euse the saddle band and the screws.
• R euse the S.T. support.
Photo 19-4
Water pump
Nut (G1")
Gasket (G1")
Scale trap
Saddle band
OCH570C
Pipe (Water pump
- DHW tank)
S.T. support
Screws
96
PHOTOS
Photo 19-1
Screws
Photo 19-2
Nut (G3/4")
Photo 19-3
Nut (G3/4"),
Gasket (G3/4")
Pipe (Tank - P-HEX
(W-W))
Plate (under P-HEX
(W-W))
Screw
(right side)
Pipe (W.P. - Tank)
Quick connection
clip
Screw fixing the
S.T. support
Screw (right
side)
Water pump
Pipe
(W.P. - Tank)
Screw fixing
the S.T.
support