Mitsubishi Electric EHPT20Q-VM2EA Service Manual page 76

DISASSEMBLY PROCEDURE
(4) Close(OFF) the pump valve and strainer
valve.(Photo 16-7 and 16-8)
When the pump valve/strainer valve handle is stiff,
use a tool to grip the handle and turn it carefully.
When opening or closing the pump valve/strainer
valve, ensure to do so fully, not halfway.
(5) Install the drain cock hose at the drain cock of
the booster heater inlet (lower right), and drain
water.(Photo 16-9)
(6) Detach the 2 quick connections (Inlet and outlet of
booster heater)(Photo 16-10 and 16-11)
When reinstalling the quick connections, use new
O-rings.
Photo 16-9
Photo 16-10
GCH15010
drain cock
hose
Photo 16-11
quick connection
booster heater
PHOTOS
Photo 16-7
Photo 16-8
< pump valve and strainer valve >
or
Open
booster heater
76
pump valve
pump valve
strainer valve
strainer valve
or
Close
quick connection