PHOTOS
82
5. How to remove water pump (primary circuit)/pump valve/
strainer valve
<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 4-2)
(3) Release the water pump lead wire from the 2 cable
clamps, the fastener and the cable strap in the control
box, and the cable strap, the coated clamp and the 3
bands below the control box. (Photos 4-1 and 10-1)
(4) Close (OFF) the pump valve and the strainer valve
(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 terminal box facing to the
left.
<Pump valve>
(6) Remove the 2 screws on the pump valve stay. (Photo
5-1)
(7)
Remove the pump valve by detaching the quick connection.
•
When reinstalling the quick connection, use new O-ring.
•
Refer to Procedure 23 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
Strainer
valve
Water pump
(primary circuit)
Nut (G1")
Gasket (G1")
Terminal
box
Quick
connection
Strainer valve
handle
Pump valve
Pump valve
handle
Nut (G1")
Gasket (G1")
Gasket
(G1")
Gasket (G1")
O-ring
Strainer
valve stay
Screws
Screws
Pump valve stay
Continue to the next page.
Photo 5-4
Screws
Flow direction
Pump valve stay
Drain cock
(primary circuit)
OCH570C
Summary of Contents for EHPT20X-MHCW
Page 108: ......
