MAINTENANCE MANUAL
Mirage technical manual
page 30 of 65
Check restrictor in mix-block on scale build-up
Even when you keep your water treatment system in excellent condition, a minor amount of scale will
still be deposited on the inside of your Mirage. Most ducts within the machine have such dimensions
that a little scale will not influence proper functioning. However, the flow restrictor, or jet, within the
mix-block has an opening with a diameter of 0.7 mm and is thus easily affected by any scale build up.
While scale builds up, the temperature of the dispensed hot water will increase.
Water mains of the Mirage should be shut for this operation, the machine does not have to cool down.
Note!
Do not drill the restrictor while it is installed in the mix-block. Carbonate fragments will fall into the mix-
block and may cause problems later on (clogging the restrictor or getting stuck in the solenoid valve).
Materials needed
Allen key 3 mm
Spanner 14 mm
Phillips screwdriver no. 2
Drill bit 0.7 mm
4 locking washers 4 mm
Figure M 13a (left). Showing mix-block (seen from back of machine) with both flange valves. Nut and
washers on solenoid coil have been removed to illustrate top side of coil.
Figure M 13b (right). Use a 3 mm Allen wrench to remove the restrictor. The restrictor is mounted in
the cold water supply side of the mix block (inset).
Procedure
1. Close the water mains.
2. Remove cup warmer.
3. Remove the coil from the cold-water flange valve (this is the right hand valve as seen from the
back of the machine) with a 14 mm spanner. There is no need to remove the electrical plug from
the coil (see Figure M 13a).
4. Remove the 4 Phillips bolts that hold the flange valve to the mix-block, a little water may leak at
this stage. Prevent the locking washers from falling into the machine.
5. Lift the valve from the mix-block.
6. You will see the restrictor in one of the openings under the valve (see Figure M 13b-inset). Use a
3 mm Allen key to remove the restrictor.
7. Check the restrictor for scale build-up. It is advised to use a 0.7 mm drill-bit to remove scale. It is
easiest to immobilise the drill and twist the restrictor by hand over the drill.
8. Remount the restrictor in the mix-block.
restrictor
