Valor Fires 954, Инструкция для установщика и владельца

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3.10.3 Precast concrete or clay flue block system and hearth.
The appliance can be installed to a precast concrete or clay flue block system
conforming to BS1289 or BS EN 1858 with dimensions as in figure 6.
BS 1289 part 1 recommends there should be an air space or insulation between the
flue blocks and the plaster because heat transfer may cause cracking on directly
plastered flues. However, generally this appliance is suitable for installations under all
circumstances unless there is a history of cracking problems. Remember that faults
such as cracking may be caused by poorly built and restrictive flues, e.g. mortar
extrusions, too many bends, flue heights below three metres, restrictive terminations
etc.
The appliance is suitable for installations conforming to older versions of BS1289 as
well as the current edition. The flue blocks must have a minimum width not less than
63mm and a cross-sectional area not less than 13,000mm2. Older editions of BS1289
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©
Baxi Heating U.K. Limited 2010.
INSTALLER GUIDE
Figure 6. Pre-cast fireplace