Mitsubishi Electric EHGT17D-YM9ED Service Manual page 82

DISASSEMBLY PROCEDURE
7. How to remove the P-HEX (Water-Water)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the frame. (Refer to Procedure 4-2.)
(3) Release the lead wires from the clamp on the control box.
(Photo 5-1)
(4) Remove the module box front. (Refer to Procedure 6-3.)
(5) ▪ Drain and collect water. (Refer to Procedure 6-4.)
▪ Recover water from the drain cock of tank. (Figure 7)
(6) Release the lead wires from the clamps on the P-HEX
(Water-Water). (Photo 7)
(7) Remove the G3/4" nuts and the 4 of 3/4" gaskets from
the P-HEX (Water-Water). (Photo 7) When removing the
P-HEX (Water-Water) and water comes out from inside,
recover water with a container.
(8) Remove the screws fixing P-HEX (Water-Water) and the
tank base (2 screws 4x10).
(9) Remove the P-HEX (Water-Water).
Note:
Tightening torque of the G3/4" nuts: 42 ± 2 N▪m
8. How to remove the scale trap and the water pump
(sanitary circuit)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the frame. (Refer to Procedure 4-2.)
(3) Remove the control box. (Refer to Procedure 5.)
(4) Remove the P-HEX (Water-Water). (Refer to Procedure 7.)
(5) Remove the pipe tank-EPHEX.
(G3/4" nuts, 3/4" gaskets) (Photo 8-1)
(6) Remove the ST band above the water pump (sanitary
circuit) (2 screws 4x10). (Photo 8-1).
(7) Remove the G1" nut and the 1" gasket on the water pump
(sanitary circuit). (Photo 8-1)
(8) Remove the ST-WP support from the side frame R
(2 screws 4×10). (Photo 8-1)
(9) Remove the G1" nut and the 1" gasket under the water
pump from the ST-WP assy. (Photo 8-2)
(10) Remove the ST band on and under the scale trap from
the ST-WP assy (2 screws 4x10) each at 2 positions).
(Photo 8-2)
(11) Remove the scale trap and the water pump.
Note:
The tightening torque of the G1" nut: 42 ± 2 N▪m
Water pump
(sanitary circuit)
OCH722A
Photo 7
Figure 7
Photo 8-1
Photo 8-2
Scale strap
G1" Nut
1" Gasket
82
PHOTOS/ FIGURES
Clamps
P-HEX
(Water-Water)
Screws 4×10
P-HEX
(Water-Water)
G1" Nut
1" Gasket
G3/4" Nut
3/4" Gasket
Scale trap
pump
Pipe tank-
EPHEX
Water pump
(sanitary circuit)
ST-WP assy
G3/4" Nuts
3/4" Gaskets
Drain cock
ST-WP support
ST band
Screws
4×10
Screws
4×10
Side frame R
ST bands
Screws 4×10