How To Remove The Expansion Vessel; How To Remove The Drain Cock (Primary Circuit) - Mitsubishi Electric EHSD-MEC.UK Service Manual

R410a hydrobox
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DISASSEMBLY PROCEDURE
10. How to remove the manometer / pressure relief valve / air
vent (automatic) (Continued)
<Air vent (automatic)>
(1) Remove the air vent with a flare joint using two
spanners: one to hold the flare joint and the other to turn
the flare nut.
(2) Remove the flare joint from the air vent. (Photo 10-6)
Photo 10-6
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 two 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.

12. How to remove the drain cock (primary circuit)

(1) Remove the front panel. (Refer to Procedure 1.)
(2) Swing the control box to the front. (Refer to Procedure 4.)
(3) Remove the drain cock (primary circuit).
Photo 12-1 (E*S* series)
Drain cock
OCH571
Photo 10-5
Flare joint
Photo 11-1
Photo 11-2
Photo 12-2 (EHPX series)
Booster heater
74
PHOTOS
Expansion vessel
Metal support
Screws
Expansion vessel
Gasket G3/8"
Drain cock
Air vent
Flare joint
Flare nut
Flare joint
Booster heater

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