Mitsubishi Electric EHPT20Q-VM2EA Service Manual page 58

DISASSEMBLY PROCEDURE
7. How to remove water pump1 (primary circuit)/pump
valve
< Water pump1 >
(Water pump lower left in the cylinder unit)
(1) Remove the front panel .
(2) Disconnect the CNP1 connector, the earth cable
and the CNPWM connector in the controller box. (Photo
7-1 and 7-2)
(3) Release the water pump lead wire from the cable
clamps ,the cable strap in the control box and the
bands below the controller box.(Photo 7-3 and 7-4)
(4) Open the pressure relief valve cap and lower the
tank internal pressure.(Photo 7-5)
(5) When removing the pump valve, open the drain
valve to drain all water. (Photo 7-6)
< CAUTION >
After this step, recoat the removed earth cable with
RTV silicone rubber (KE-3490).(Photo 7-1)
Photo 7-3
A
cable
clamps
Photo 7-5
pressure relief
valve cap
GCH15010
Photo 7-1 (Larger scale of the A part)
CNP1
connector
earth cable
Recoat the removed earth
cable with RTV silicone
rubber (KE-3490) here.
Photo 7-2 (Larger scale of the B part)
CNPWM
connector
B
Photo 7-4
cable
cable
clamps
clamps
drain valve
58
PHOTOS
screw
controller box
Photo 7-6