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The appliance is fitted with either an operating switch or an
electronic programmer on the facia panel for the control of domestic
hot water and central heating.
OPERATING SWITCH
One of three positions can be selected:
HOT WATER ONLY. The appliance will operate at any time there
is a demand for hot water.
OFF. Both hot water and central heating will remain off.
HEATING AND HOT WATER. Hot water will be supplied when a
demand is made. Central heating will operate continuously in
response to a demand from a room thermostat or thermostatic
radiator valves if fitted.
NOTE: The switch is connected so that it is not possible to turn
on the central heating without the hot water.
ELECTRONIC PROGRAMMER
Your Installer will have mounted the optional electronic
programmer on the appliance facia panel. Operating instructions are
supplied with the programmer.
TEMPERATURE CONTROLS
The Central Heating Temperature Control Knob gives control
over the temperature of water supplied to the radiators when the
boiler is serving the central heating system. This control does not
influence the temperature of the Hot Water which is set by the Hot
Water Temperature Control Knob. The control knobs have a range as
indicated in Fig. 2.
The operating temperatures may be set anywhere within the
range. With a high central heating temperature setting the radiators
will get hotter and high room temperatures will be achievable.
Similarly the temperature of the hot water can be controlled. With
lower settings the radiators and hot water will be cooler but in winter
conditions the central heating and hot water may not reach their
design temperatures.
OPERATION OF
CONTROLS
Fig. 2. Facia panel.
Control knob AControl knob B
Minimum setting Maximum setting Demand H
Standby GOperating switch C
WATER
OFF
HEATING & WATER
HOT WATER HEATING
TEMPERATURETEMPERATURE
