MULTIPOINT
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6.0 MAINTENANCE - DESCALING
Little maintenance is required, however in hard water areas the unit will require
periodic descaling to ensure efficient operation. To descale the unit:
6.1
Switch off and disconnect the electrical supply. Turn off the water supply to the
unit.
6.2
Open a hot tap to relieve any system pressure. Disconnect the plumbing
connections to the unit and remove from the wall bracket (note full weights of
units). Empty unit through the outlet connection.
6.3
Remove the terminal cover as described in Section 5.8.
6.4
Disconnect the electrical terminations to the thermostat. Disconnect earth links to
the earthing stud.
6.5
Remove the element plate assembly by unscrewing the five securing screws,
tapped jacking points are provided. Remove any loose scale from the container.
Carefully clean off any scale from the element and thermostat pocket. DO NOT
clean scale from interior container walls.
6.6
Re-assemble the element plate assembly fitting a new sealing gasket. Note the
correct orientation of the element plate by reference to Figure 6 overleaf. Rewire
the unit with reference to the Wiring Diagrams.
6.7
Re-commission the unit following the INSTALLATION and COMMISSIONING
instructions.
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