Mitsubishi Electric EHPT20Q-VM2EA Service Manual page 72

DISASSEMBLY PROCEDURE
13. How to remove the flow sensor B (primary circuit)
< Flow Sensor B >
(1) Remove the front panel.
(2) Disconnect the CN2B connector in the controller
box. (Photo 13-1)
(3) Release the flow sensor lead wire from the cable
clamps and the bands below the controller box.
(Photos 13-1 and 13-2)
(4) Open the pressure relief valve caps and lower
the tank internal pressure.(Photo 13-3)
(5) Open the drain cock (Primary side) below the
HEX to drain water inside.(Photo 13-4)
(6) Remove the flow sensor B. (Photo 13-5)
・Draw out the quick connection to the front side
and remove.
・Be sure to set the flow sensor B so that the
direction of flow arrow is facing downwards.
・When replacing the flow sensor B, be sure to use
a new O-ring.
pressure relief valve caps
Photo 13-3
Photo 13-4
drain cock
(the primary side)
drain cock
(the sanitary side)
GCH15010
Photo 13-1
Photo 13-2
cable band
hex
Photo 13-5
Flow sensor B
72
PHOTOS
CN2B
connector
Flow sensor 1
Flow sensor A
cable
bands