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10
INSTALLATION INSTRUCTIONS
SITE REQUIREMENTS
1. FLUE AND CHIMNEY REQUIREMENTS
1.1 The chimney or flue system must comply with the rules in
force, and must be a minimum of 125mm (5”) in diameter.
Pre cast flues must conform to BS1289: 1986. The cross
sectional area of the flue must be 16500 mm
2
with a
minimum dimension of 90mm.
*When fitting the appliance to a pre cast flue, the total
minimum depth of fire opening necessary is (D) 215mm. This
allows a 25mm space behind the appliance for debris,
required on this type of flue system. This is achieved either by
using = (A) a 115mm deep starter block + (B) a 25mm
plasterboard and sealed space + (C) 75mm Gazco space
(part number 8315) with a marble slip or similar, inserted
behind the spacer front flange, see diagram 1.
Or the total depth can be achieved by using a deeper starter
block, remedial building work to the front of the fireplace
opening, and a marble slip or similar, or a combination of this.
NEVER PLASTER DIRECT TO THE FACE OF A PRECAST
FLUE. USE ADHESIVE TO FIX THE PLASTERBOARD TO THE
FACE OF THE FLUE AND FINALLY SKIM THE
PLASTERBOARD.
1
A = Minimum precast flue starter block depth (115mm).
B = Plasterboard and adhesive seal all around fire opening.
C = Gazco spacer (8315)
D = Minimum total depth including 25mm for debris.
A
B
C
D
Hearth level
AR1217
When fitting the Logic Convector fire and a Stovax Cast Iron
Convector fireplace to a precast letter box flue with a
standard starter block, the 8315 spacer kit will be required,
together with an extra deep 142mm rebate surround.
The Combination Convector breast. Fireplace requires a
75mm stud-work chimney breast.
The appliance can also be fitted into a metal flue box with a
5” (125mm) diameter flexible liner. In this installation a 1”
(25mm) rebated fire surround must be used. Refer to
diagram 2 for dimensions.
Class 1 flues. Chimneys over 9” x 9” must be lined.
A flue restrictor is provided with the Logic convector. This
must be fitted when the flue is 9” x 9” or when the flue pull
is excessive. This is fitted from inside the appliance across the
outlet at the top of the convector box with two screws
provided.
1.2 The minimum effective height of the flue or chimney must
be 3 m (10ft).
1.3 The chimney or flue must be free from any obstruction.
Any damper plates should be removed or secured in the
fully open position, and no restrictor plates should be fitted.
1.4 The chimney should be swept immediately prior to the
installation of the appliance - unless it can be seen to be
clean and unobstructed throughout its entire length.
1.5 Ensure that there is a smooth taper transition from the
fireplace opening into the chimney or flue.
1.6 The flue pull should be checked prior to installation of the
appliance. Apply a smoke pellet to the flue or chimney
opening and ensure that the smoke is drawn into the
opening. If there is not a definite flow, preheat the chimney
for a few minutes and re-test the flow.
IF THERE IS STILL NO DEFINITE FLOW, THE CHIMNEY
MAY REQUIRE ATTENTION - SEEK EXPERT ADVICE.
2. APPLIANCE LOCATION
2.1 This appliance must stand on a non-combustible hearth
that is at least 12mm thick and 50mm thick at least at the
periphery.
2.2 It must be fitted into a non-combustible opening.
2.3 These appliances must be hearth mounted into a fireplace
opening conforming to National Standards. The minimum
dimensions shall be as shown in diagram 2.