11
4.
THE FIREPLACE
4.1
INSTALLATIONS NOT REQUIRING
OPTIONAL SPACING KIT 617K
4.1.1
Fireplace size
The fireplace must comply with the requirements
described in section 2.2. This will probably entail removing
the fireback and infill material behind the fireback. The
debris catchment area shown in figure 10 must be kept
clear of obstructions.
4.1.2
Fireplace general condition
The fireplace floor should be reasonably flat to ensure that
the convection box can be installed without it rocking and
so that a good seal can be made at the bottom front of the
box. The front face of the fireplace should be reasonably
flat over the area covered by the convection box top and
side flange seals to ensure good sealing. These faces should
be made good if necessary. If the appliance is to be fitted
against a wall with combustible cladding, the cladding must be removed from the area
covered by the fire front surround (see figure 5). We suggest that the actual fire front is
used as a template to mark the area for combustible cladding removal.
4.1.3
Soundness for appliance attachment
Two primary methods of retaining the appliance are provided:-
1)
By fixing to the fireplace front surround.
2)
Using concealed tension cables fixed to the rear of the fireplace opening together
with secondary fixing to the fireplace floor.
The methods are detailed in section 7 of this manual. Before selecting the retention
method, consult with the customer. Method 2 is provided for instances where drilling
holes in the front surface of the fireplace surround is unacceptable to the customer or
otherwise impractical.
N.B. It is unwise to attempt to drill into marble without the proper tools and
equipment
.
If method 1 is chosen, make sure that the front surround area is sound enough to take the
rawlplugs and woodscrews. If necessary, make sound with a suitable cement.
If method 2 is chosen, make sure that the areas at the back and towards the centre of the
fireplace floor are sound enough to take the eyebolts and screws. If these areas have
deteriorated due to prolonged use, they should be made sound with a suitable cement.
4.1.4
Installations using a metal flue box
The whole of the top surface of the metal flue box must be covered with a 100mm layer of
mineral wool or equivalent insulation (see figure 2).
4.2
INSTALLATIONS REQUIRING SPACING KIT 617K
The accessory kit 617K must be used for all installations described in section 2.3 of this
manual. Full instructions for its installation are included with the kit.
4.3
FIREPLACE FLUE PULL
After preparing the fireplace, carry out the flue flow test as detailed in BS5440: Part 1.
Note - A 13 gramme smoke pellet will generate the required volume of smoke, anything
smaller may give a false pass result.
Observe the smoke. If there is a definite flow into the opening continue with the
installation. If there is not a definite flow, preheat the chimney for ten minutes and
recheck If there is still no definite flow, the chimney may need attention.
Do not fit the
appliance. Seek expert advice
.
Figure 10 Fireplace Areas
Содержание Marseille BR622
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