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9. FLUE REQUIREMENTS
These checks MUST be made during any site survey or before constructing the Builders Opening
Note : Not Suitable for Standard Pre-Cast Flues however some Pre-Cast Flues may meet the Minimum Dimensions as
Detailed below
The Appliance is suitable for Installation into the following types of Flue.
a.
Conventional Stone/Brick Built Flue (Class 1) with a minimum cross sectional dimension of 175mm (7”) with a minimum effective
height of 3 meters.
b.
A Flue Lined with a 5” Flexible Flue Liner (Minimum Size) connected to a Register Plate fitted and sealed at the top of the Builders
Opening with a minimum effective height of 3 meters.
c.
A purpose designed flue box to BS715 fitted with a 5” twin walled flue with a minimum effect height of 3 meters. Details are
available from your authorised supplier.
d.
The flue
MUST
be free of any obstructions. Any dampers or restrictors
MUST
be
removed. Some dampers are impractical to be
removed; therefore they
MUST
be fixed in some way in the
OPEN
position.
e.
The chimney/flue should be swept if it has been used for solid fuel.
f.
Ensure that only one fireplace is served by the flue system.
g.
Ensure that the chimney/flue is continuous from inlet to termination.
h.
Ensure that the chimney/flue is structurally sound, so that combustion products do NOT come into contact with combustible
materials outside the chimney.
i.
Check for any signs of Down Draught issues with the Installation and any surrounding properties as this could affect the
safe operation of the fire. If this is considered a possibility we would recommend the use of a Specialized Down Draught Rotating
Terminal, however be aware that these may not protect against all Down Draught situations.
j.
If a Wall Mounted Television is being considered check the wall above the existing builders opening for signs of overheating.
k. CHECK FLUE PULL.
Apply a smoke match or smoke generator to the flue opening at hearth level and observe smoke.
If there is a definite flow into the flue aperture, proceed with installation. If there is not a definite flow into the flue aperture, preheat
the flue for approximately 10 minutes and re-test. There may also be a lack of ventilation so consider opening a window slightly to
see if this results in acceptable clearance. If there is not a definite flow towards the flue aperture the flue may need attention.
DO NOT FIT THE APPLIANCE, SEEK EXPERT ADVICE.
10. VENTILATION
a.
No additional purpose provided ventilation is normally required for the fire when installed in the UK; however this
must
be
confirmed by the Spillage Test, see Section 15.2.
b.
For other Countries refer to National Regulations and Local Codes.
c.
This appliance is fitted with an oxygen depletion sensing system, which automatically shuts off the gas supply to the fire if the
oxygen level in the room is depleted, due to lack of primary air, or obstructed flue that would lead to incomplete combustion of the
gas. It
must not
be tampered with and only replaced with a genuine Nu-Flame ODS Pilot.
11. GAS SUPPLY
It Is Recommended to Check The Next Section as Building Work May Affect the Gas Supply Routing.
a.
Carry out a gas soundness test before working on the gas supply.
b.
Gas supply provision should be made in accordance with the latest Gas Safety (Installation and Use) Regulations as amended.
c.
Confirm that the fire has been supplied for the correct gas to be used by checking the Data Badge in the base of the fire.
d.
A route for a concealed gas supply is provided through a hole in the rear of the fire, at a position of 165mm to the left of the
centre of the fire and 38mm up from the base of the Builders opening. An isolation elbow is provided at the control inlet.
e.
Where the gas supply passes through walls, floors, voids, concrete and wall cavities the supply should be sleeved.
f.
Determine the gas supply pipe size required taking into account any other gas appliances.
g.
Determine where the gas supply pipe needs to terminate and fit the 8mm compression isolation/pressure test elbow provided.
h.
In common with all other gas appliances, dirt and debris in the gas system can block the valve and gas injectors on this
appliance, and faults caused by this are not covered by the guarantee.
Therefore it is important that all gas pipes
must
be purged of both air and debris.
i.
If you suspect that there may still be dirt and/or debris in the gas system, fit a filter in the pipeline, before the gas isolation/pressure
test elbow.
j.
Do
not
use jointing compound on any compression fittings on the fire. The use of jointing compound on the compression joints on
this appliance will possibly invalidate the guarantee, as it can get into the control mechanism and cause a malfunction.
k.
Seal off the isolation/pressure test elbow and check all gas connections for gas soundness before proceeding to fit the fire.
! IMPORTANT NOTE !
Always reseal the pressure test point and check that it is gas tight.
(This accounts for a lot of recalls.)
