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How the heater works
The heating element is controlled by a thermostat which senses the water
temperature. The operating temperature can be adjusted by the regulation
knob on the front of the heater.
In addition to the thermostat there is a thermal cut-out which is set to switch
off the power to the element if the thermostat fails and the water
temperature rises too high. Once the cut-out operates it can only be reset
manually (this should be carried out by the installer - see maintenance).
A magnesium anode is provided to prevent corrosion of the water
container. The EP 30 R 3KW model has a temperature and pressure relief
valve on top of the heater which is a safety device to back-up the
thermostat and thermal cut-out. It works by sensing an excess water
temperature or pressure and releasing the hot water to the discharge
tundish and drain.
The heater will only work in the vertical position as the element is shaped
to heat the water at the bottom of the tank. The inlet pipe needs to deliver
cold water to the bottom of the tank and the hot water outlet draws water
from the top of the tank.
When water is heated it expands, in a small unvented water heater of this
type the expansion can normally be accommodated back into the cold
water mains (not model EP 30 R 3KW).
Where this is not possible the installer will need to fit a set of cold water
controls.
Installation instructions
Before installing the heater read these instructions in full. If you are
unsure please contact our technical service department (01494
539579).
The
installation
Regulations/Byelaws and Building Regulations.
The installer should check with the local water authority for
confirmation of the maximum water supply pressure.
a) SITING & FIXING
WARNING:
A drain has to be provided for any water discharged through the safety
valves.
must
comply
The appliance should be left packed until it is
ready to be installed. When unpacking the EP 30
R 3KW model take care not to damage the
temperature and pressure relief valve on the top
of the heater.
with
all
relevant
Water
3
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