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INSTALLER GUIDE
5. FIREPLACE CHECK
5.1 Fireplace check.
5.1.1 Fireplace size
The fireplace must comply with the requirements described in section 3.2. This may
entail removing the fireback and infill material behind the fireback.
5.1.2 Fireplace general condition
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.
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. 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 4). 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.
5.1.3 Soundness for appliance attachment
One primary methods of retaining the appliance is provided: -
1)
Using concealed tension cables fixed to the rear of the fireplace opening.
The method is detailed in section 9.1 of this manual. Make sure that the areas at the
back and towards the centre of the fireplace floor are sound enough to take the eyebolts.
If these areas have deteriorated due to prolonged use, they should be made sound with a
suitable cement.
5.1.4 Installations using a metal flue box
The whole of the top surface of the metal flue box must be covered with a minimum
50mm layer of mineral wool or equivalent insulation (See figure 2).
5.2 Fireplace flue pull.
Close all doors and windows in the room in which the appliance is to be installed. After
confirming with a match that smoke is drawn into the flue, light a 13 gram smoke pellet
and check that there is a definite flow through the flue. Verify outside that the smoke
exits from one terminal only and that the termination is suitable. Observe where
possible, upstairs rooms and loft spaces for signs of escaping smoke indicating a
defective flue. If there is not a definite flow warm the flue for a few minutes and repeat
the smoke pellet test. If there is still no definite flow the flue may need remedial work –
Do not fit the appliance until there is a definite flow through the flue.
Page 13
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