Bosch 28CDI - Manual (Page 8)

8
OPERATION OF
CONTROLS
OPERATING SWITCH
In the ‘ ’ position there is no mains electricity to the
appliance.
In the ‘I’ position mains electricity is connected to the
appliance.
CENTRAL HEATING TEMPERATURE
CONTROL
The position of this knob will determine the temperature of the
water delivered to the radiators between the ‘I’ and ‘MAX’ position.
When the knob is turned anti-clockwise past the ‘I’ position towards
the ‘
’ (Summer Position), then the appliance will operate in the
HOT WATER mode only and no heat will be delivered to the radia-
tors.
DOMESTIC HOT WATER TEMPERATURE
CONTROL
The position of this knob will determine the temperature of the
water delivered at the domestic hot water taps between the ‘ ’ and
the ‘MAX’ position.
By slightly reducing the flow of domestic water from the tap, the
delivery temperature of the water will be further increased. This is of
particular advantage in the winter, for example to increase bath water
temperature. Also this will provide an added advantage of reducing
the delay before hot water is obtained.
FACIA MOUNTED PROGRAMMER (if fitted)
Your installer may have mounted either a mechanical or an elec-
tronic programmer into the facia of your appliance. Operating instruc-
tions are supplied with the programmer.
RESET BUTTON
Press this button in for five seconds if any of the indicator lights
are flashing slowly.
SYSTEM PRESSURE GAUGE
The red needle has been set to show the sealed system pressure
which is required for the appliance to operate effectively. The grey
needle will show the actual pressure in the system. This does not
apply to any open vent system.