Mitsubishi Electric PUZ-WM50VHA Service Manual page 78

OPERATING PROCEDURE
15. Removing the plate heat exchanger
(1) Remove the nozzle of plate heat exchanger for the water
piping.
(2) Remove the service panel. (See Photo 1)
(3) Remove the refrigerant.
(4) Remove the piping.
(5) Remove the plate heat exchanger fixing screws (1 for
right/ 4 × 10 and 1 for rear/ 4 × 10), then slide the plate
heat exchanger upward to remove it.
(The plate heat exchanger is fixed to the base with a
hook on the bottom.)
Note 1: Drain the water in the plate heat exchanger before
removing the water piping.
Note 2: Recover refrigerant without spreading it in the air.
16. Removing the reactor (ACL1, ACL2, ACL3) (Y model only)
(1) Remove the electrical parts box. (See Photo 3-1)
(2) Remove the reactor assy fixing screws (4 for right/ 4 ×
10), then slide the reactor assy upward to remove it.
(3) Remove the reactor fixing screws (4 for front/ 4 × 10), to
remove the reactor on the reactor assy.
Note 1: Pay extra attention when handling the reactor
since it is very heavy (4.1 kg).
Removing the pressure relief valve and the gasket
17.
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the cover panel. (See photo 1)
(4) Remove the stay and the side panel (R). (Refer to
Procedure 9)
(5) Remove the electrical parts box. (Refer to Procedure 3)
(6) Drain the water in the plate heat exchanger.
(7) Loosen the nut of the pressure relief valve by a span-
ner (flat across width: 19mm).
(8) Remove the pressure relief valve and the gasket.
• When reinstalling the G3/8" nut, use a new
G3/8"gasket.
Note1: The water may spout if the pressure relief
valve is removed while the water is still inside
the plate heat exchanger.
Note2: Tightening torque of the nut: 15 ± 1 N.m.
OCH727
PHOTOS/FIGURES
Photo 14
Plate heat
exchanger
Photo 15
Reactors
Reactor assy
Photo 16
Pressure relief valve
78
Nozzle of
plate heat
exchanger
Plate heat exchanger
fixing screws
Nut connecting the
pressure relief valve