7.6 Earthing:
The unit MUST be earthed and a facility is provided for this in the unit Design. You must have the unit fitted by
a suitably qualified installer – ESP Accepts no responsibility for units that are not fitted by fully qualified
engineers Also, failure to have the unit fitted by a suitably qualified installer will invalidate the
warranty/guarantee of the unit.
7.7 Unit/System Controls:
The main control that is supplied with the unit is for viewing and altering system operating parameters. Other
controls will be necessary to control zone valves for solar or other auxiliary requirements.
7.8 Immersion Heater:
The unit is supplied with a 1.5kW immersion heater as standard. This can be used as an alternative and/or
complementary heat source and is used to raise the temperature of the stored water to a temperature above 60°C
once a week (automatically) to remove any risk from Legionella bacteria. The immersion heater is located
behind the black panel on the front of the unit.
Diagram 14. Great care should be taken to ensure that the unit is properly wired to the
mains electricity and any auxiliary components.
The mains wire connection will be found towards the top of the unit. The power supply
required is a standard 13A supply, unless a 3kW immersion heater is specified in which
case a 20A supply is required.
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