Valor Heartbeat Oxysafe 426 Installation & Servicing Instructions Manual - page 4
4
2.3
In the United Kingdom, as supplied, the
appliance can be installed in the following situations.
2.3.1
Conventional fireplace and hearth
The appliance can be installed to a fireplace complete
with surround and hearth
The fireplace opening must be within the following
dimensions:
Width: Max.
432mm
Min:
305mm
Height Max:
610mm*
Min.
510mm
* Though the total height of the closure plate will
accommodate a maximum opening height of 650mm,
heights above 610mm will leave the closure plate and
sealing tape visible above the appliance.
The appliance must be mounted on a non-combustible
hearth (N.B. conglomerate marble hearths are
considered as non-combustible). The hearth must be at
least 710mm wide x 300mm deep. The hearth material
must be at least 12mm thick. The periphery of the
hearth (or fender) should be at least 50mm above floor
level to discourage the placing of carpets or rugs over it.
The appliance can be fitted to a purpose made
proprietary class “O” 100“C or 150°C surround.
2.3.2.
Wall mounted
The appliance can be wall mounted.
The opening must be within the following dimensions:
Width: Max.
432mm
Min.
305mm
Height: Max.
610mm*
Min.
372mm
* Though the total height of the closure plate will
accommodate a maximum opening height of 650mm,
heights above 610mm will leave the closure plate and
sealing tape visible above the appliance.
The centre of the flue spigot must be at least 512mm
above the finished floor covering.
2.3.3.
Precast flue
The appliance can be installed to a fireplace that has a
precast concrete or clay flue block system conforming to
BS1289. The appliance is suitable for installations
conforming to older versions of BS1289 as well as the
current edition. The flue blocks must have a minimum
width not less than 63mm and a cross-sectional area not
less than 13,000mm
2
.
Older editions of BS1289 required
a cross-sectional area of 13,000mm
2
. The current
revision of the standard requires 16,500mm
2
. This
appliance is suitable in both cases.
The chimney should be on or two storeys high but not
less than 3m vertical height and be correctly terminated.
No mortar fangs between the blocks should be extruded
into the flueway. If raking blocks are used, they must be
fitted in accordance with the manufacturer’s
instructions. Mortar must not be allowed to drop down
and accumulate in the raked positions.
The fireplace opening must be within the following
dimensions:
Width: Max.
423mm
Min:
305mm
Height Max:
610mm*
Min.
610mm*
* Though the total height of the closure plate will
accommodate a maximum opening height of 650mm,
heights above 610mm will leave the closure plate and
sealing tape visible above the appliance.
2.3.4.
Metal flue box
The appliance can be installed to a metal flue box
complying with the constructional requirements of the
current edition of BS715.
The opening must be within the following dimensions:
Width: Max.
432mm
Min:
380mm
Height Max:
610mm*
Min.
510mm
*Although the total height of the closure plate will
accommodate a maximum opening height of 650mm,
heights above 610mm will leave the closure plate and
sealing tape visible above the appliance.
2.4.
Flues
The flue must be clear of any obstruction and its base
must be clear of debris.
The flue must be completely sealed so that combustion
products do not come into contact with combustible
materials outside the chimney.
Suitable flues are as follows:-
(a)
225mm x 225mm conventional brick flue. If a
flue liner is used, it must be a minimum of 127mm (5in)
diameter. The liner must be sealed to the surrounding
area above the fireplace opening and to the top of the
chimney with an approved terminal being used.
(b)
A properly constructed precast flue conforming
to B.S 1289.
(c)
A flue pipe with a minimum diameter of
127mm 5in.). See B.S 6461 Part 1 for suitable materials.
Metal flue pipes must comply with B.S 715. See section
2.3.4 of this manual for flue box opening sizes.
2.4.1
The flue must have a minimum equivalent
height of 3m.
2.4.2.
The flue must serve only one fireplace.
2.4.3
Any damper or register plate should be
removed. If removal is not possible without carrying out
structural work, the damper or plate may be left in the
flue provided that it is permanently secured in the fully open
position.
2.4.4.
If the appliance is intended to be installed to a
chimney which was previously used for solid fuel, the
flue must be swept clean prior to installation. All flues
should be inspected for soundness and freedom from
blockages.
2.5
If the fireplace opening is an underfloor draught
type, it must be sealed to stop any draughts.
2.6.
The flue spigot and any spigot extension must
be capable of passing through the closure plate by at least