Woodfire EVO 20, Руководство по эксплуатации и установке, Страница: 8 / 21

2.4 Connection of the heating system
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Installations should always be carried out by a competent person. Please ensure
that the heating system is thoroughly cleansed before connecting the boiler. Failure
to do so could invalidate the warranty.
NEVER operate the burner without connection to the heating system, as this may
lead to irreparable damage to the water container of the burner.
BS EN 12828 and BS EN 14336 specify requirements and give recommendations on good
practice involved in the general planning, designing, installation and commissioning of
forced circulation hot water central heating systems, and should be used where
appropriate.
The intended heating system can be laid out as an open or closed heating system. In any
case a sufficient overheating safeguard at the burner needs to be secured.
If installed on a closed (pressurised) system, a pressure relief valve should be installed in
the water circuit as close as practicable to the appliance and in a position where it would
vent safely, along with an over heat safety valve (see section 2.5).
If installed on an open vented system, the feed and expansion tank must be manufactured
to BS 4215, and be designed to withstand the 500-hour boil test without leaking or
collapsing. It should be installed as high as possible, in the highest part of the circuit and
as near as possible to the boiler.
A means of dissipating heat, e.g. a radiator fed by gravity, should be provided so that heat
can be dissipated in cases where the pump fails or is not switched on and the appliance
continues to produce heat.
The water in the central heating system should contain suitable antifreeze to give frost
protection. After a period of inactivity, on no account should the appliance be lit until it is
ensured that there is a free flow of water through the central heating and hot water
systems. The use of a return-flow-elevation or a three-way-valve (such as an LK 810
ThermoMat W Eco load unit) with an adjusted minimum temperature of 60°C is essential
to ensure the stove burns cleanly and efficiently. The maximum operating temperature is
90°C. The maximum operating pressure may not exceed 1.5 bar.
At the lowest points of the heating system an outlet valve needs to be installed.
Illustration 4 is a suggested typical plumbing schematic showing the boiler stove
connected to a pressurised thermal store. The positioning of the pipes for the heat leak
radiator around the load unit is very important. In the LK 810 ThermoMat range, the
gravity circuit flap grub screw should be removed to allow circulation around the heat leak
radiator in the event of power failure.
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