How To Remove The Booster Heater - Mitsubishi Electric EHSD-MEC.UK Service Manual

DISASSEMBLY PROCEDURE

7. How to remove the booster heater

(1) Remove the front panel. (Refer to Procedure 1.)
(2) Disconnect the booster heater lead wires from the CNBHT
connector on the controller board and from the BHC1
(Lead wire No.1, No.2 and No.3) and BHC2 (Lead wire
No.4, No. 5 and No.6) contactors respectively. (Photo 7-1)
(3) Swing the control box to the front. (Refer to Procedure 4.)
Note: Do not mix up the lead wire numbers when
re-connecting the lead wires to the contactors as
the lead wire numbers are different dependent on
the models.
Model Lead wire No.
EHSC-VM6C No.1
EHSC-VM6EC
No.2
No.3
No.4
EHSC-YM9C No.1
EHSC-YM9EC
No.2
EHSC-TM9C
No.3
EHPX-YM9C
No.4
No.5
No.6
EHSD-VM2C No.1
EHSC-VM2C
No.2
EHSC-VM2EC
ERSD-VM2C
EHPX-VM2C
ERSC-VM2C
Refer to 6. WIRING DIAGRAM
<E*S* series>
(4) Remove the pump valve. (Refer to Procedure 5.)
(5) Remove the flow sensor. (Refer to Procedure 6.)
(6) Remove the L joint and the pipe (L-F.S.) by detaching the
quick connection. (Photo 7-2)
• When reinstalling the quick connection, use new O-ring.
• Refer to page 77 for how to attach and detach the quick
connection.
(7) Remove the flare nut (Photo 7-2).
(8) Remove the pipe (P.V.-B.H.) by detaching the quick
connection. (Photo 7-2)
• When reinstalling the quick connection, use new O-ring.
• Refer to page 77 for how to attach and detach the quick
connection.
(9) Remove the two screws that hold the heater stay onto
the back panel. Lift the booster heater slightly and
remove the booster heater with the heater stay from the
back panel. (Photo 7-2 and 7-3)
(10) Remove the 2 screws on the back of the heater stay
and remove the heater stay from the booster heater.
(Photo 7-3)
• Reuse the removed heater stay and the heater stay
fixing screws.
Photo 7-3
OCH571
Contactor
BHC1-U
BHC1-V
BHC2-U
BHC2-V
BHC1-U
BHC1-V
BHC1-W
BHC2-U
BHC2-V
BHC2-W
BHC1-U
BHC1-V
Screws
Heater stay
64
PHOTOS
Photo 7-1
Booster heater
connector (CNBHT)
Earth leakage
breakers (ECB1)
BHC2
BHC1
Cable strap Coated clamp
* The photos shown are of the EHSC-YM9C model.
Photo 7-2 E*S* series)
(
Back panel
O--ring
Screw
Heater stay
Screw
Pipe
Pump valve
(P.V.-B.H.)
Control box
Cable strap
Flare nut
Booster
heater
Quick
connection
L joint
Pipe
(L-F.S.)
Nut
Flow
sensor
Nut
Quick O-ring
connection