Mitsubishi Electric EHSD-MED Service Manual page 71

DISASSEMBLY PROCEDURE
8. How to remove the plate heat exchanger (continued)
(8) Remove the strainer valve by removing the 2 screws, and
detaching the same diameter quick connection. (Photo 8-8)
• When reinstalling the same diameter quick connection,
use a new O-ring.
• Refer to procedure 16 for how to attach and detach the
quick connection.
(9) Remove the flare nuts on the gas and liquid pipes under
the hydrobox using 2 spanners: one to hold each flare joint
and the other to turn each flare nut.
(10) Remove the TH2 thermistor from the thermistor holder.
(Photo 8-7 and refer to Procedure 14. Photo 14-2)
(11) Remove the water coil cover by removing the 6 screws.
(Photo 8-7)
(12) Pull out the plate heat exchanger from the hydrobox by
lifting it upward. (Photos 8-9 and 8-10)
(13) Remove the strainer valve by detaching the different
diameter quick connection from the plate heat exchanger.
(Photos 8-8 and 8-9)
• When reinstalling the different diameter quick connection,
use a new O-ring.
• Refer to Procedure 16 for how to attach and detach the
quick connection.
Photo 8-10
9. How to remove the pressure sensor
<Only E*SD series>
(1) Remove the plate heat exchanger. (Refer to Procedure 8.)
(2) Remove the band. (Photo 9.)
(3) Remove the welded part of the pressure sensor. Be sure
not to burn the pipe cover. (Photo 9.)
Note: The temperature of the pressure sensor must be
100 °C or below when welding.
OCH712C
Photo 8-8
Plate heat exchanger (inside)
Photo 8-9
Plate heat exchanger
Photo 9
Plate heat
exchanger
(inside)
71
PHOTOS/ FIGURES
Different diameter
quick connection
Strainer valve
TH2 thermistor
Plate heat exchanger
Strainer valve
Screws
Same
diameter
quick
connection
Pressure
sensor
Welding
part
Band