Redring DC3810 manual Electrical Connections, Always Consult The Regulations

ELECTRICAL CONNECTIONS

Immersion heaters are rated 3kw at 240v (2.76kw at 230v), incolloy elements, with a thermal energy cut- out, and must be connected via double pole switches with a 3mm contact gap separation. Appropriate wiring for the electrical load must be used. The twin immersion heaters supplied with direct units can be switched to utilise low tariff electricity supply. Do not switch on until the unit is full of water.

Immersion heaters are supplied fitted in the body of the unit. Always ensure that the joints are watertight on commissioning. The thread is non-standard. Order replacements using reference number on page 14. Do not fit an immersion heater without a high limit thermostat. Immersion heaters fitted are designed for domestic use only, either utilising low tariff electricity and occasional boost or for switched periods during the day.

Immersion heaters must meet BS EN 60730-2-1.

Units must be earth bonded.

The fuse rating for 6kw loading is 25 amps, for the 3kw (indirect) model the fuse rating is 13 amps.

ALWAYS CONSULT THE REGULATIONS!

INDIRECT INSTALLATIONS

The indirect pattern products are supplied with dual thermostats with sensing probes and with a motorised two port valve.

The thermostat has to be wired in order to control the water temperature in the system and, if the high limit is tripped, to operate the two port valve in such a way as to route primary water back to the boiler and isolate the cylinder (see diagram).

NB: By-pass must be fitted	BOILER
in accordance with boiler	CIRCS
manufacturer's instructions	22mm

2PORT VALVE

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