How To Remove The Plate Heat Exchanger; Ersc-Vm2B Only - Mitsubishi Electric EHSC-VM2B Service Manual

DISASSEMBLY PROCEDURE

8. How to remove the plate heat exchanger

(1) Pump down the refrigerant circuit and close the stop
valve on the indoor unit. (Refer to "12. Supplementary
information".)
(2) Remove the front panel. (Refer to Procedure 1.)
(3) Remove the control box cover. (Refer to Procedure 3.)
(4) Disconnect the CNP1 connector on the controller board
and the earth cable in the control box.
(5) Release the water pump lead wire from the 2 cable
clamps, the cable strap, the 2 coated clamps, and feed
the lead wire out the control box without putting strain on
the CNP1 connector.
(6) Swing the control box to the front. (Refer to Procedure 4.)
(7) Remove the pump support top by removing the 2 screws
that hold it to the pump support under. (Photo 8-2)
Note: To avoid dropping of the pump support top, hold it
by hand when removing the last screw.
(8) Remove the THW1 and TH2 thermistors from the
thermistor holders respectively. (Photo 8-2)
(9) Close the pump valve (lower) and remove the G1-1/2"
nut using two spanners: one to hold the pump valve and
the other to turn the nut.
* When reinstalling the G1-1/2" nut, use a new G1-1/2"
gasket. (Photo 5-3)
(10) Remove the G1" nut (upper) on the booster heater and
the water pump with the pump valve and the water pipe.
(Photo 8-2)
* When reinstalling the G1" nut, use a new G1" gasket.
Photo 8-3

ERSC-VM2B only

Pump support under
Pump bracket
Water pump
Screws
Pump bracket
Gasket
(G1-1/2")
Nut (G1-1/2")
Pump valve
(lower)
TH2
OCH532A
Screws
Rubber
Nut (G1")
Gasket
mount
(G1")
Photo 8-1
Control box
Water pump connector (CNP1)
Cable
clamps
Cable
strap
Coated clamp
Photo 8-2
THW1
Flexible
hose
Nut (G1")
Pump valve
(upper)
Nut
(G1-1/2")
Pump sup-
port under
Screw
Water pump
Pump sup-
port top
Gasket
(G1-1/2")
Nut (G1-1/2")
Strainer
Pump valve
TH2
(lower)
Band
74
PHOTOS
Earth cable
Nut
(G1")(upper)
Gasket (G1")
Rubber Pressure
Nut (G1")
Gasket
relief valve
mount
(G1")
Booster
heater
Nut
(G1")
Gasket
(G1")
Screw
Flow
switch
Band