Mitsubishi Electric EHSC-MEC Service Manual page 88

DISASSEMBLY PROCEDURE
10. How to remove the manometer / pressure relief valve / air
vent (automatic) (Continued)
<Pressure relief valve(5bar)>
(3) Remove the right side panel.
(4) Remove the band at the base of the pressure relief
valve(5bar).
(5) Remove the pressure relief valve with a flare joint using
2 spanners: one to hold the flare joint and the other to
turn the flare nut. (Photo 10-5)
(6) Remove the pressure relief valve using 2 spanners: one
to hold the flare joint and the other to turn the pressure
relief valve. (Photo 10-4)
(7) Eliminate loctite on the thread surfaces using remover.
(Photo 10-4)
• Before reinstallation, apply loctite over the thread
surface on the pressure relief valve.
• For more details about the loctite and the remover,
refer to Page 91.
• The outlet for the pressure relief valve (5bar) should
be open ended and facing the rear panel.
<Air vent (automatic)>
(3) Remove the air vent with a flare joint using 2 spanners:
one to hold the flare joint and the other to turn the flare
nut.
(4) Remove the flare joint from the air vent. (Photo 10-7)
Photo 10-7
Air vent
11. How to remove the expansion vessel
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Swing the control box to the front. (Refer to Procedure 4.)
(3) Remove the flare nut using 2 spanners: one to hold the
flare joint and the other to turn the flare nut. (Photo 11-1)
(4) Remove the 2 screws on the metal support.
Note: To avoid dropping of the expansion vessel, hold
the expansion vessel with the metal support by
hand when removing the last screw.
(5) Pull out the metal support. (Photo 11-1)
(6) Pull out the expansion vessel. (Photo 11-1)
(7) Remove the flare joint from the expansion vessel.
(Photo 11-2)
• When reinstalling the flare joint, use a new G3/8" gasket.
Note: To avoid dropping of the expansion vessel, hold it
securely when removing it.
OCH571D
Photo 10-5 (R3 model only)
Photo 10-6
Flare joint
Photo 11-1
Photo 11-2
88
PHOTOS/ FIGURES
Expansion vessel
Pressure relief valve (5bar)
Expansion vessel
Metal support
Screws
Expansion vessel
Gasket G3/8"
Flare joint
Band
Flare nut
Air vent
Flare joint
Flare nut
Flare joint