6
EFFICIENT HEATING SySTEM OPERATION
The boiler is a high efficiency, condensing appliance which
will automatically adjust its output to match the demand for
heat. Therefore gas consumption is reduced as the heat
demand is reduced.
The boiler condenses water from the flue gases when operating
most efficiently. To operate your boiler efficiently (using less
gas) turn the central heating temperature knob (C) to the ‘
‘ position or lower. In winter periods it may be necessary
to turn the knob towards the ‘
max
’ position to meet heating
requirements. This will depend on the house and radiators
used.
Reducing the room thermostat setting by 1ºC can reduce gas
consumption by up to 10%.
WEATHER COMPENSATION
When the Weather Compensation option is fitted to the system
then the central heating temperature knob (C) becomes
a method of controlling room temperature. Turn the knob
clockwise to increase room temperature and anti-clockwise
to decrease room temperature. Once the desired setting has
been achieved, leave the knob in this position and the system
will automatically achieve the desired room temperature for all
outside weather conditions.
BOILER FROST PROTECTION
The boiler is fitted with frost protection that operates in all
modes, provided the power supply to the boiler is always
turned on. If the water in the boiler falls below 5ºC, the frost
protection will activate and run the boiler to avoid freezing.
The process does not guarantee that all other parts of the
system will be protected.
If a system frost thermostat has been installed, the boiler
must be set in winter mode, ‘
’, for the system frost
protection to run.
If no system frost protection is provided and frost is likely
during a short absence from home it is recommended to leave
the system heating controls or built in programmer (if fitted)
switched on and run at a reduced temperature setting. For
longer periods, the entire system should be drained.
BOILER RESTART
To restart the boiler, when directed in the listed fault messages
(see section 9), turn the mode knob (D) to ‘
restart
’ position
and IMMEDIATEly turn knob back to required setting. The
boiler will repeat its ignition sequence. If the boiler still fails
to start consult a Gas Safe Registered Engineer or in IE a
Registered Gas Installer (RGII).
MAINS POWER OFF
To remove all power to the boiler the mains power switch
must be turned off.
