4
Independent -
User’s
3. SySteM WAteR PReSSURe
The system pressure gauge (G - see
page 3) indicates the central heating
system pressure. If the pressure is seen
to fall below the original installation
pressure of 1-2 bar over a period of
time and continue to fall then a water
leak may be indicated. In this event re-
pressurise the system. If unable to do so or if the pressure
continues to drop a Gas Safe Registered Engineer or in IE a
Registered Gas Installer (RGII) should be consulted.
THE BOILER WILL nOT OPERATE If THE PREssuRE
HAs REduCEd TO LEss THAn 0.3 BAR undER THIs
COndITIOn.
4.
CondenSAte dRAin
This appliance is fitted with a siphonic condensate trap
system that reduces the risk of the appliance condensate
from freezing. However should the condensate pipe to this
appliance freeze, please follow these instructions:
a. If you do not feel competent to carry out the defrosting
instructions below please call your local Gas Safe
Registered installer for assistance.
b. If you do feel competent to carry out the following instructions
please do so with care when handling hot utensils. Do not
attempt to thaw pipework above ground level.
If this appliance develops a blockage in its condensate pipe,
its condensate will build up to a point where it will make a
gurgling noise prior to locking out an “L2” fault code. If the
appliance is restarted it will make a gurgling noise prior to it
locking out on a failed ignition “L2” code.
To unblock a frozen condensate pipe;
1. Follow the routing of the plastic pipe from its exit point on
the appliance, through its route to its termination point.
Locate the frozen blockage. It is likely that the pipe is
frozen at the most exposed point external to the building
or where there is some obstruction to flow. This could be
at the open end of the pipe, at a bend or elbow, or where
there is a dip in the pipe in which condensate can collect.
The location of the blockage should be identified as
closely as possible before taking further action.
2. Apply a hot water bottle, microwaveable heat pack or a
warm damp cloth to the frozen blockage area. Several
applications may have to be made before it fully defrosts.
Warm water can also be poured onto the pipe from a
watering can or similar. DO NOT use boiling water.
3. Caution when using warm water as this may freeze and
cause other localised hazards.
4.
Once the blockage is removed and the condensate can flow
freely, restart the appliance. (Refer to “To Light the boiler”)
5. If the appliance fails to ignite, call your Gas Safe
Registered engineer.
Preventative solutions
During cold weather, set the central heating temperature knob
(C) to maximum, (Must return to original setting once cold
spell is over).
Place the heating on continuous and turn the room
thermostat down to 15ºC overnight or when unoccupied.
(Return to normal after cold spell).
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 codes (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.