Ehpx Series - Mitsubishi Electric EHSD-MEC.UK Service Manual

DISASSEMBLY PROCEDURE
5. How to remove water pump/ pump valve(continued)

EHPX series

<Water pump>
Close the pump valve and strainer valve (OFF) before
removing the water pump, and open the valves (ON) after
reinstalling the water pump.
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Disconnect 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) Close (OFF) the pump valve and strainer valve, and
remove the G1" nuts using two spanners: one to hold the
G1" nut and the other to turn the other side of G1" nut.
Remove the water pump by sliding it up. (Photos 5-5)
• When either of the pump valve handle or strainer valve
handle is stiff, turn the handle 90 degrees clockwise
mainly by using a spanner.
• When reinstalling the G1" nuts, use new G1" gaskets.
(Photo 5-3)
• Set the water pump in the way that the die stamped
arrow facing to the left, and the terminal box facing to
the upper side. (Photo 5-2)
• When opening or closing the pump valve and strainer
valve, ensure to do so fully, not halfway.
<Pump valve>
(6) Remove the screws fixing the pump valve stay. (Photo
5-5)
(7) Remove the pump valve by detaching the quick connec-
tion. (Photo 5-5)
• When reinstalling the quick connection, use new O-ring.
• When either of the pump valve handle or strainer valve
handle is stiff, turn the handle 90 degrees clockwise
mainly by using a spanner.
• When reinstalling the pump valve, place the handle to
the upper side of the pump valve.
• When 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)
• Refer to page 77 for how to attach and detach the quick
connection.
Note: Skip Steps (2) and (3) above when replacing the
pump valves only.
OCH571
PHOTOS
Photo 5-5(EHPX series)
Nut Gasket
(G1") (G1")
Pump valve
Screws
Pump valve
stay
O-ring Quick
connection
62
Terminal Nut Gasket
box (G1") (G1")
Strainer
valve
Flow direction