MAINTENANCE MANUAL
Mirage technical manual
page 36 of 65
Replace sealing disk in expansion valve
Materials needed
Spanner 12 mm (16 mm on new model valve)
Replacement sealing disk
Heat resistant, food safe, grease
Procedure
1. Turn mains switch
to “1”, close water mains and remove left hand side panel.
2. Pull black silicone hose from expansion valve, place towel or sponge under expansion valve
opening.
3. Relieve pressure from the coffee system
(activate a group until the LED’s start flashing).
4. Turn mains switch
to “0”.
5. Note how far outer nut is screwed onto valve. Remove outer part of the expansion valve
completely by turning counter-clockwise with 12 mm (or 16 mm on new model valve) spanner.
6. Inside is a spring and plunger. The far end of the plunger has a sealing disk. Take out the sealing
disk and replace with new, put a little food safe grease on the disk and on the Viton O-ring around
the outer part of the expansion valve.
7. Turn outer part on expansion valve until approximately the same position as (6) above, then
another 2 full turns.
8. Open water mains.
9. Continue with (4
) in section “check expansion valve”.
