2 PORT
VALVE
NB: By-pass must be fitted
in accordance with boiler
manufacturer's instructions
BOILER
CIRCS
22mm
7
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).
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!
New Stainless imp_alt 2/15/05 12:15 PM Page 8
