Mitsubishi Electric EHST20C-VM6HA Service Manual page 64

DISASSEMBLY PROCEDURE
10. How to remove the plate heat exchanger
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Pump down the refrigerant circuit and close the
stop valve at the outdoor unit side. (Refer to 12.
SUPPLEMENTARY INFORMATION.)
(3) Remove the control box. (Refer to Procedure 4.)
(4) Cut the bands and remove the pump frame. (Photo 10-1)
(5) Cut the bands bundling the pipes. (Photos 10-2, 10-3)
(6) Remove the 2 flare nuts on the refrigerant piping on top
of the cylinder unit. (Photo 10-3)
(7) Close (OFF) the strainer valve handle (under).
w When the valve handle is stiff, remove the handle and
turn the vertical stem 90 degree mainly by using a
spanner. (Photo 5-2)
(8) Remove the 1" nut at the booster heater side of the
flexible hose. (Photo 10-2)
w When reinstalling the 1" nut, use a new 1" gasket.
(9) Remove the 1" nut under the strainer valve. (Photo 10-2)
w When reinstalling the 1" nut, use a new 1" gasket.
(10) Remove the 4 screws fixing the plate heat exchanger.
(Photo 10-2)
Photo 10-3
Bands
Flare nuts
Photo 10-1
Bands
Photo 10-2
Bands
Screws
plate heat
exchanger
strainer
valve
handle
(under)
strainer
valve
Gasket (1")
Top panel
Screws
Nut (1")
(under the strainer valve)
64
PHOTOS
Pump frame
Screw
Cable straps
Nut (1")
Band
Gasket (1")
Screw
Band