Ascari - 12kW -
page 11 -
3 - ELECTRIC CONNECTIONS
IMPORTANT NOTICE
Electric connections might be loosed during transportation.
To avoid abnormal overheat, carefully check quick connection terminals and screwed connections.
• 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.
• With the boiler plumbed in the electrical connections can be made to the boiler :
• This appliance must be earthed !
• 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.
• The boiler should be permanently connected to the electricity supply, direct from a 63A fused supply on the
consumer unit wia a double pole linked switch with minimum contact gap of 3mm. No other appliances
should be powered from this supply.
• 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.
• External command (a phase 230V common to the boiler must be connected to terminal 25).
• The power supply cable 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.
• The Earth wire should be connected to the top terminal marked with the Earth symbol.
• The Neutral wire should be connected to the large terminal marked "N".
• The live wire to the large terminal labelled PH.
• Do not switch on the electricity supply until asked to do so in the Commissioning and Testing section.
• 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 350 litre/hour circulation. Further guidance can be obtained from the Domestic Heating
and Hot Water Guide to the building regulations.
