Chimney Preparation; Fireplace Preparation; The Hearth - Valor 956 Installer And Owner Manual

4.6 Chimney preparation.

4.6.1 If the appliance is intended to be installed to a chimney that was previously
used for solid fuel, the flue must be swept clean prior to installation. All flues should
be inspected for soundness and freedom from blockages.
4.6.2 Any chimney damper or restrictor should be removed. If removal is not possible,
they must be secured in the open position.

4.7 Fireplace preparation.

4.7.1 If the fireplace opening is an underfloor draught type, it must be sealed to stop
any draughts.
4.7.2 The fireplace floor should be reasonably flat to ensure that the hotbox can be
installed without it rocking and so that a good seal can be made at the bottom front of
the box.
4.7.3 The front face of the fireplace should be reasonably flat over the area covered
by the hotbox top and side flange seals to ensure good sealing. These faces should
be made good if necessary.
4.7.4 If the appliance is to be fitted against a
wall with combustible cladding, the cladding
must be removed from the area covered by
the fascia. The cladding must also not touch
the fascia (See figure 1). We suggest that the
actual fascia is used as a template to mark
the area for combustible cladding removal
and that this area is increased by at least
2mm all round.
4.7.5 If the fireplace opening is greater than
the acceptable dimensions given in this
guide, do not use the back of a fire surround
or marble to reduce the opening. This may
cause cracking of the surround back or
marble.

4.8 The hearth.

The appliance must be mounted behind a non-combustible hearth unless the
conditions of section 4.10.1.1 are met (N.B. conglomerate marble hearths are
considered as non-combustible). The appliance can be fitted to a purpose made
proprietary class "O"-150°C surround. The hearth material must be at least 12mm
thick. The periphery of the hearth (or fender) should be at least 50mm above floor
level to discourage the placing of carpets or rugs over it.
The appliance must not stand on combustible materials or carpets.
©
GDC Group Ltd 2014
INSTALLER GUIDE
Page 12
Figure 1. Removal of combustible
cladding (Fascia may differ from that
shown)