Mitsubishi Electric EHSD-MED Service Manual page 67

DISASSEMBLY PROCEDURE
8. How to remove the plate heat exchanger
(Steps (1) through (9) are applied to the following E*SC/D series.)
(1) Pump down the refrigerant circuit and close the stop valve on the
outdoor unit. (Refer to "12. Supplementary information".)
(2) Remove the front panel. (Refer to Procedure 1.)
(3) Swing the control box to the front. (Refer to Procedure 4.)
(4) Release the lead wires from the coated clamp. (Photo 8-1)
(5) Close the strainer valve (OFF). (Photos 8-1, 8-5 and 8-7)
• When the strainer valve handle is stiff, turn the handle 90 degrees
clockwise mainly by using a spanner.
• When opening or closing the strainer valve, ensure to do so fully, not
halfway.
(6) Remove the water pump and the pump valve. (Refer to Procedure 5.)
(7) Remove the expansion vessel. (Refer to Procedure 12.)
(8) Remove the saddle band (upper the pump) and the rubber tube by
removing the 2 screws on the saddle band. (Photo 8-1)
(9) Remove the pipe (W.C.-PUMP) by detaching the quick connection.
(Photos 8-1 and 8-5)
• When reinstalling the quick connection, use a new O-ring.
• Refer to Procedure 16 for how to attach and detach the quick
connection.
(10) 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.
Photo 8-1 (E*SC series)
Quick connection
Expansion vessel
Screws
Water coil cover
Plate heat exchanger
(inside)
Pump valve
Quick connection
O-ring
Coated clamp
Quick connection
O-ring
OCH712C
Pipe (W.C.-PUMP)
O-ring
Screw
Strainer valve
Gasket (G1")
67
PHOTOS/ FIGURES
Saddle band
(upper the pump)
Rubber tube
Nut (G1")
Screw
Water pump
Pipe (PUMP-B.H.)