Electrical - Dimplex ASCARI MA12 Installation Manual

2.7 - Electrical

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Wiring external to the appliance must be in accordance with the current I.E.E Wiring regulations (BS 7671)
for electrical installation and any local regulations, which apply.
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With the boiler plumbed in, the electrical connections can be made
to the boiler:
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This appliance must be earthed!
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The Ascari boiler comes with cage-clamp connectors. These are operated using a 2.5mm x 0.4mm blade
screwdriver for accessory terminals and 3.5mm x 0.5mm blade screwdriver for power terminals.
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The boiler should be permanently connected to the electricity supply, direct from a 63A fused supply on the
consumer unit via a double pole linked switch with minimum contact gap of 3mm. No other appliances
should be powered from this supply.
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The number and cross-section of connector is mandatory 3 x 16² (phase + neutral + earth) (see § 2.15
«connection to the electricity supply»)
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To connect a wire, insert the blade of the screwdriver into the opening located just above or below the
central mark of the terminal block and pivot the blade towards the centre. The wire may then be inserted
into the cage and the screwdriver blade removed (see § 2.14 «Power terminal»).
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ROOM THERMOSTAT - The no voltage connections of a room thermostat may be connected to terminals
1 (common contact) and 2 (Normally Open contact) of the boiler (please check compatibility with thermostat
manufacturers installation instructions), routing the cable through the smaller cable entry points. If using a
non-programmable room thermostat it is recommended that the no-voltage switched contacts of a separate
timer / programmer be connect in series with the room thermostat to terminal 2 of the boiler. WARNING- a
switched live must not be connected to the boiler terminals.
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If used the cylinder thermostat normally open contact (240V) should be connected to terminal 25 of the
boiler's electrical connectors ( see section Boiler electrical connections)
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The power supply cable (3x16²) should be routed through the large cable entry point at the bottom of the
boiler. If desired the cable entry may be moved to the top of the boiler by removing the self sealing nut from
the bottom to the top entry point.
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The Earth wire should be connected to the top terminal marked with the Earth symbol.
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The Neutral wire should be connected to the large terminal marked 'N'.
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The live wire to the large terminal labelled PH.
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Do not switch on the electricity supply until asked to do so in the Commissioning and Testing section.
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As a minimum it is recommended that a room thermostat be installed to control the appliance. Thermostatic
radiator valves may be fitted to the system, however they must not be fitted in the room where the room
thermostat is fitted. There must be at least one radiator installed with lock shield valves that should not be
closed and will allow 350litre/hr circulation. Further guidance can be obtained from the Domestic Heating
and Hot Water Guide to the building regulations.
Ascari MA12 -p. 17 -