Filter
Top Products
Page 4 of 13
If the boiler is to be placed in a cupboard this cupboard should not be used as a storage cupboard. Ventilation
should be provided as detailed below.
Ventilation
This boiler does not require a purpose provided air ventilation in the room, however it does require room air
to circulate through the boiler to ensure the convection heat output performance is maintained.
If the boiler is installed in an enclosure or small cupboard, there must be an equivalent ventilation free area
in the enclosure or small cupboard to that of the boiler.
Upper Ventilation Free Area These should be the same or larger than in the
appliance case mm
2
Lower Ventilation Free Area As above
Electrical Supply
This appliance must be earthed
The appliance is supplied with a 2 m electrical flex with integral fused plug, which requires a standard 220 -
240V ~ 50Hz supply via a normal ring main socket. If required, the plug connection can be made via the 24
hour plug in timer supplied.
All fuses must be ASTA approved to BS 1362
In the event of an electrical fault after installation of the boiler, preliminary electrical system checks must be
carried out. i.e. earth continuity, short circuit, polarity and resistance to earth.
Central Heating Systems
This boiler is designed specifically for use in small, pressurised, sealed system installations. The installation
must comply with BS 6798.
Safety Valve – The safety valve, which is pre-set at a maximum of 3 bar is an integral part of the boiler and
cannot be adjusted. Its relief outlet must be piped to a suitable outside position.
Pressure Gauge
This indicates the system fill pressure. It will show a higher pressure when the system is hot.
Circulating Pump
The circulating pump is located inside the boiler case. Its performance is suitable for all systems to which
the boiler should be connected.
Expansion Vessel
The expansion vessel, which is located inside the boiler case, has a capacity of 2.0 L, with a pre-charge of
0.5 bar.
The maximum heating system water content using this integral expansion vessel is 24.0 L. This is with a
cold fill of 0.5 bar.
Should the system volume be in excess of that specified, a second expansion vessel must be connected to the
heating system. BS 5449 gives further guidance for expansion vessel sizing.
Vessel Charge and Initial System Fill Pressure Bar 0.5 1.0 1.5
For Expansion Vessel Capacity
(Multiply the system Volume by)
0.0833
0.109
0.156
Total system water capacity using the integral
2.0 L expansion vessel
Litres
25.0
18.4
12.8