Mitsubishi Electric EHGT17D-YM9ED Service Manual page 85

DISASSEMBLY PROCEDURE
11. How to pull out the module unit assy
(Pull out the module unit assy before removing the reactor, brine
pump, water pump, flow switch, booster heater, LEV, COMP,
P-HEX, flow sensor, H.P. switch, or H.P. sensor, muffler.)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the frame. (Refer to Procedure 4-2.)
(3) Remove the module box front. (Refer to Procedure 6-3.)
(4) Drain and collect water. (Refer to Procedure 6-4.)
(5) Drain and collect brine from the drain cock below the brine
pump. (Photo 11-1)
(6) Tighten the module box front to the module box assy with
8 HEX screws 5x12 from A to H. (Photo 11-2)
(7) Disconnect the relay connectors below the table. (Photo
4-2)
Connector color Number of pins Applicable parts
White 3
White 9
White 16
White 12
White 8
White 10
(8) Release the lead wires from the clamp on the control box.
(Photo 5-1)
(9) Release the lead wires from the P-HEX (Water-Water).
(Refer to Procedure 7-6.)
(10) Release the lead wires from the clamp of the module box
top. (Photo 11-3)
(11) Remove the 4 flexible pipes from the pipe of the unit assy
(2 fasteners, 2 of G1" nuts, 2 of 1" gaskets, 2 O-rings).
(Photo 11-4)
(12) Hold the nylon bands, and pull out the module unit assy.
(Photo 11-5)
Notes:
1. Tightening torque of the G1" nuts: 42 ± 2 N▪m
2. Tighten the module box front in the order from screw A to L.
Photo 11-5
Module unit assy
Nylon band
OCH722A
Comp
LEV-A / Flow SW / HP SW
Thermistor
Booster heater
Primary side pump (power)
Brine pump
Primary side pump (control)/
Flow sensor/ Pressure sensor
<Figure 11-5-1>
Module box side L
(Screws 4×10)
85
PHOTOS/ FIGURES
Photo 11-1
Module unit assy
Photo 11-2
A
Hex screws
5×12
E
I
F
J
C
Photo 11-3
Clamp
Photo 11-4
Module box side R
(Screws 4×10)
Drain cock
Module box front
B
K
G
H L
D
Module box top
Fasteners
G1" Nuts
O-rings
1" Gaskets
Flexible pipe
Module box top
(Screws 4×10)
Module box back
(Screws 4×10)