Logic HE Conventional Flue Combined Controls Installation User Instructions

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1. Flue & 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.
Precast flues must conform to BS1289: 1986. The cross
sectional area of the flue must be 16500mm
2
with a
minimum dimension of 90mm.
When fitting the appliance to a precast flue, the total
minimum depth of appliance 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
Spacer (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.
Gazco Spacer
(optional)
1
Hearth Level
D
A C
B
A = Minimum precast flue starter block depth (115mm)
B = Plasterboard and adhesive seal all around appliance opening
C = Gazco Spacer (8315)
D = Minimum total depth including 25mm for debris
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 3, Pre Fab Metal Box for dimensions.
* Class 1 flues. Chimneys over 9" x 9" must be lined.
1.2 A flue restrictor is provided with this appliance. This can be
fitted when the flue is equal to or greater than 7" or when
the flue pull is excessive, see Diagram 2.
2
Restrictor
Screws
This is fitted from outside the appliance across the outlet at
the top of the box with 2 screws provided.
1.3 The minimum effective height of the flue or chimney must
be 3 m (10ft).
1.4 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.
1.5 The chimney should be swept immediately before installing
the appliance, but it need not be swept if you can see the
chimney is clean and free from obstruction throughout.
1.6 Ensure that there is a smooth taper transition from the
fireplace opening into the chimney or flue.
1.7 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.
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