PHOTOS/FIGURES
Gasket G1"
75
OCH714D
5. How to remove water pump (primary circuit)/pump valve/
strainer valve
<Water pump>
Close the pump 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 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, 10-1 and 10-6)
(4) Close (OFF) the pump valve and the strainer valve
(Except for ERST17D-***BD model) (Photo 5-1)
• When either of the pump valve handle or the strainer
valve handle is stiff, use a tool to grip the handle and
turn it carefully.
• When opening or closing the pump valve and the
strainer valve, ensure to do so fully, not halfway.
(5) 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 valve>
(6)
Remove the 2 screws on the pump valve stay. (Photo 5-1)
(7)
<E**T**C/X series>
Remove the pump valve by detaching the quick connection.
<E**T**D series>
Detach the quick connection from pump valve and P-HEX.
Remove the pipe (pump-wc) and the elbows.
Remove the pump valve.
• When reinstalling the quick connection, use new O-ring.
• Refer to Procedure 25 for how to attach and detach the
quick connection.
(8)
Remove the pump valve stay by removing the 2 screws,
and remove the drain cock (primary circuit). (Photo 5-4)
• Reuse the removed pump valve stay and the pump
valve 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 valve only.
Photo 5-1
Photo 5-2
Photo 5-3
DISASSEMBLY PROCEDURE
Quick connection
O-ring
Water pump
(primary circuit)
Terminal
box
Nut (G1")
Gasket (G1")
Gasket
(G1")
Strainer
valve stay
Screws
Continue to the next page.
Photo 5-4
Screws
Flow direction
Pump valve stay
Drain cock
(primary circuit)
Nut (G1")
Gasket (G1")
Strainer
valve
Pump valve
Pump valve stay
