Publication No. 5106228
4
User’s Instructions
Things you need to be aware of
Air Locks
The boiler pump is fitted with an automatic air vent and
will bleed air from the boiler when required.
To access the bleed screw for this vent, pull off the top
front cover, remove the small inner panel and the
screw cap is situated just below the opening. Unscrew
by no more than one turn when air in the system is
suspected. e.g. after replacing a radiator. Tighten
screw again after 24 hours.
C.H. System Pressure
The Status Display window shows the actual water
pressure in the central heating system. It will drop
slightly when the central heating starts and will rise by
anything up to 1.5 bar as the central heating reaches
full temperature.
We recommend that the system pressure, when cold
be between 1.0 and 1.5 bar. If the pressure is falling,
the status display will flash
‘P 0.9’ or lower and it is
advised to top up at this stage
. If the pressure drops
below 0.5 bar the boiler will not light, the status display
will show ‘P 0.4’ or 'A 15’ and it will be necessary to
top up the pressure.
To top up:
Pull bottom panel off front of boiler and
connect filling loop to valve on cold water inlet. Open
both valves slowly and allow pressure to rise. Close
valves, disconnect filling loop and re-fit bottom panel.
If regular topping up is needed get your installer to
check the system for leaks
.
Severe loss of system pressure is indicated by 'A 15'
on the display and the red 'Lockout' neon will be on.
Top up as above then press the ‘Reset’ button, this will
reset the boiler and it should now light.
Flue
This exits through the roof or outside wall. Ensure it
does not become obstructed, particularly by foliage or
snow. Due to the high efficiency of the boiler and the
resulting low flue gas temperature, a plume of white
condensate may be emitted from the flue outlet
terminal. This will be particularly noticeable during cold
weather and does not indicate a problem with the
boiler.
The flue pipe becomes very hot when the boiler is
operating. If the pipe is visible (such as in a loft space)
it is important that no flammable materials are allowed
to come into contact with the pipe.
Freezing Conditions
If the water temperature within the boiler drops below
5 °C, a sensor operates and runs the burner to keep
the water from freezing. This will only operate if the
electricity supply to the boiler is ON. If you are away
during periods of cold weather we recommend leaving
your boiler on and adjusting your control system (e.g
thermostat) to suit.
Condensate Outlet Pipe
If this has been run externally, it may drip water. This is
perfectly normal. Steps should be taken to prevent the
outlet freezing in very cold weather.
Safety Discharge Pipe
Ask your installer to identify the discharge pipe from
the pressure relief valve. Normally no water is vented
but scalding water and steam may be emitted and
indicate a fault condition. Switch off the boiler and call
your Installer.
Precautions should be taken to prevent the outlet
becoming blocked and to minimise the hazard to
persons (especially children) where the pipe
discharges.
Cleaning
The outer case parts can be wiped down with a damp
cloth to remove any marks. Do not use abrasive
cleaning agents as they may damage the finish on the
case parts.
Other controls
These may be fitted within the system e.g. room
thermostat. Full instructions on their use should have
been supplied with them.
In an Emergency
Gas
- In the event of a gas leak turn off the supply at
the isolating cock. If the leak is in the pipe from the gas
meter then turn off the isolating cock at the meter as
well. Call your gas supplier immediately.
Electricity
- The boiler can be isolated from the mains
supply by removing the plug from the socket or
switching the fused supply off.
Central Heating system
- If a radiator, pipe or the
boiler starts leaking, set the boiler On/Off Switch to
‘Off’ as this will stop the pump from working and will
minimise loss of water. Reference can be made to the
Installation & Servicing Instructions on how to remove
the outer casing and close the isolating cocks to the
central heating flow and return.
Hot Water
- If a hot water pipe starts to leak, set the
boiler On/Off Switch to ‘Off’, turn off the mains water
supply at the stopcock and collect the water in a
suitable container,
take care, it could be
Very Hot
.
(Remember to switch on any supplies you have closed once the
problem has been corrected).
