Newman Rydal 5 SE, Инструкция по установке и эксплуатации, Страница: 21 / 55

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Air inlet vents should be positioned in the room at locations to avoid them becoming blocked.
If the air supply is inadequate the chimney draft may be too weak, with the possible result that
the stove will not burn properly leading to a potentially dangerous situation. Smoke spillage
may also occur especially during the refueling process.

If there is an extraction fan fitted in adjacent rooms where this appliance is fitted, additional air
vents may be required to alleviate the possibility of spillage of products of combustion from
the appliance/flue while the fan is in operation. Refer to B.S. 8303 Part 1. Where such an
installation exists, a test for spillage should be made with the fan or fans and other appliances
using air in operation at full rate, (i.e. extraction fans, tumble dryers) with interconnecting
doors fully open. and all external doors and windows closed. If spillage occurs following the
above operation, an additional air vent of sufficient size to prevent this occurrence should be
installed.

This stove requires an adequate air supply in order for the stove to operate safely and
efficiently. The installer may have fitted a permanent air supply vent into the room in which
the stove is installed to provide combustion and / or ventilation air. This air vent should not
under any circumstances be shut off or sealed.
2.9 Chimney Draft
Refer to current National laws, Building Regulations, & any Rules in Force, including BS
8303 and BS EN 15287-1:2007. Also refer to Approved Document J (England & Wales)
The recommended chimney draft is 12.5 Pa when the stove is operating at its nominal heat output.
If smoke spillage occurs when the fire door is opened, it is probably due to poor chimney draft.
This type of stove requires at least
12.5 Pa of chimney draft to achieve satisfactory combustion
and smoke spillage prevention. However, in cases where the stove door is opened too vigorously
you could expect that slight smoke spillage may occur.
Important: If the flue draught is excessive this will cause over firing and rapid burning of the fuel,
this will impair controlling the burn rate which is a dangerous situation and also cause damage to
the stove, the stove warranty would be invalidated in this situation. If the flue draught is excessive
consult a Hetas registered stove installer or (equivalent for other countries). Do not use the stove
until the situation has been remedied.
Draft conditions
The chimney’s draft is the resulting effect within the flue caused by the difference in temperature
within the flue and the cooler temperature outside. Other factors that can influence the level of
draft include the length of the flue, insulation of the chimney, adverse weather conditions or tall
buildings or trees nearby the flue terminal.
Poor draft occurs when:

The atmospheric temperature difference is too low, e.g. a poorly insulated chimney.

The outside temperature is too high, e.g. during the summer months.

There is no air movement (wind) outside.

The chimney is not tall enough, with the result that the terminal sits in the lee of the roof
surface or in the vicinity of tall trees or neighboring buildings. These conditions are also
associated with downdraft where the flue gases are pushed back down the chimney.

Flue draft is diluted by residual air entering the chimney, e.g. due to inadequate fluepipe joints