Mitsubishi Electric EHPT17X-VM2E Service Manual page 80

DISASSEMBLY PROCEDURE
5. How to remove water pump (primary circuit)/pump
elbow and G1-QRC Adapter/magnetic filter and G1-QRC
Adapter
<Water pump>
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Disconnect the CNP1 connector, the earth cable and the
CNPWM connector on the controller board. (Photo 4-2)
(3) Release the water pump lead wire from the cable clamp,
the fastener and the cable strap in the control box, and
the cable strap, the fastener and the band below the
control box. (Photos 4-1 and 8-2)
(4) Remove the water pump by removing the two G1" nuts
using the 2 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 horizontally. (Photo 5-1)
• When reinstalling the G1" nuts, use new G1" gaskets.
(Photos 5-2 and 5-3)
• Set the water pump in the way that the die stamped
arrow facing down, and the lead wire connectors to the
left. (Photo 5-1)
• Be sure to change the pump and the water pump lead
wire together.
• Be sure to wipe water around the surface of the pump
and the water pump lead wire thoroughly.
<Pump elbow and G1-QRC Adapter>
(5) Remove the 2 screws on the pump elbow stay. (Photo 5-1)
(6) Remove the pump elbow by detaching the quick
connection.
• When reinstalling the quick connection, use new O-ring.
• Refer to Procedure 24 for how to attach and detach the
quick connection.
(7) Remove the pump elbow stay by removing the 2 screws,
and remove the drain cock (primary circuit). (Photo 5-4)
• When replacing the pump elbow, use new G1-QRC
adapter.
• Reuse the removed pump elbow stay and the pump
elbow stay fixing screws.
• When reinstalling the drain cock (primary circuit), use a
new one.
Note: Skip Steps (2) and (3) above when replacing the
pump elbow and G1-QRC Adapter only.
OCH814A
PHOTOS/FIGURES
Photo 5-1
Magnetic
filter
Magnetic
filter stay
Screws
G1 QRC
Adapter
Terminal
box
Water pump
(primary circuit)
Photo 5-2
Gasket
(G1")
Photo 5-3
Photo 5-4
Screws
Drain cock
(primary circuit)
80
Quick connection
O-ring
Flow direction
Nut (G1")
Gasket (G1")
Nut (G1")
Gasket (G1")
G1 QRC
Adapter
Pump elbow
stay
Pump elbow
Gasket G1"
Pump elbow stay
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