How To Remove Water Pump/Pump Valve - Mitsubishi Electric EHSE-YM9EC Service Manual

DISASSEMBLY PROCEDURE

5. How to remove water pump/pump valve

<Water pump>
Close the pump valve and the strainer valve (OFF) before
removing the water pump, and open the valves (ON) after
reinstalling the water pump. (Photo 5-2)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) D isconnect the CNP1 connector, the earth cable, and the
CNPWM connector in the control box. (Photo 5-1)
(3) Release the water pump lead wire from the 5 cable
clamps, the 2 cable straps, the coated clamp and feed
the lead wire out the control box without putting strain on
the CNP1 connector. (Photo 5-1)
(4) Swing the control box to the front. (Refer to Procedure 4.)
(5) C lose (OFF) the pump valve and the strainer valve, and
remove the G1-1/2" nuts using 2 wrenches: one to hold
the pump and the other to turn the individual nut.
Remove the water pump by sliding it horizontally. (Photo
5-2)
• When reinstalling the G1-1/2" nuts, use a new G1-1/2"
gaskets. (Photo 5-3)
• S et the water pump in the way that the die stamped
arrow facing down, and the terminal box facing to the
left. (Photo 5-2)
• W hen opening or closing the pump valve, ensure to do
so fully, not halfway.
<Pump valve>
(6) Remove the screws fixing the pump valve stay. (Photo
5-2)
(7) Remove the pump valve by detaching the different diam-
eter quick connection. (Photo 5-2)
• When reinstalling the different diameter quick connection,
use a new O-ring.
• When reinstalling the pump valve, place the handle to
the left hand side of the pump valve.
• W hen opening or closing the pump valve, ensure to do
so fully, not halfway.
• Reuse the removed pump valve stay and the pump
valve stay fixing screws. (Photo 5-4)
• R efer to page 70 for how to attach and detach the
different diameter quick connection.
Note: S kip Steps (2) and (3) above when replacing the
pump valves only.
Photo 5-3
Gasket (G1-1/2")
OCH590B
Photo 5-4
Pump valve
Screws stay
PHOTOS
Photo 5-1
Cable
clamp
Earth cable
Lead
wire
Cable
clamps
Cable strap
Photo 5-2
Gasket (G1-1/2")
Nut (G1-1/2")
Terminal box
Water pump
Gasket (G1-1/2")
Nut (G1-1/2")
Pump valve
Pump valve
stay
60
Water pump
connector (CNP1) CNPWM
connector
Cable
clamps
Flow direction
Different diameter
O-ring
Screws
quick connection
Strainer valve