Operating instructions

If there is no existing chimney then either a prefabricated block
chimney or a twin walled insulated stainless steel ue to BS4543
can be used. These chimneys must be tted in accordance with
the manufacturers instructions and in compliance with Building
Regulations.
This product must not be installed on a shared ue.
Flue Deposits
If the chimney was previously used as an open re, it is possible
that the higher ue gas temperatures generated by the stove
may loosen deposits that were previously adhered to the inner
surface of the ue pipe which could cause blockage of the ue
pipe. We recommend that in this situation a second sweeping of
the chimney should be carried out within one month of initial stove
use after installation.
Flue Draught
The chimney should be checked before the stove is installed to
ensure that there is adequate ue pull. The draught can be checked
initially by using a smoke match close to the ue opening. If the
chimney doesn’t pull the smoke it may suggest that the chimney
needs further attention. Any remedial work to the chimney ue
should be carried out by a suitably Qualied Engineer.
A ue draught of minimum 12 Pascal to maximum 25 Pascal is
required for satisfactory appliance performance. The ue draught
should be checked under re at high output and if it exceeds the
recommended maximum a ue draught stabiliser (or ue damper
as it is also known) must be tted so the rate of burning can be
controlled and prevent overring.
Room Ventilation
For safe operation this stove must be provided with combustion
air supply in addition to normal room ventilation, in accordance
with Building Regulations. Minimum ventilation requirements vary
depending on whether the dwelling is considered to be of standard
construction or of airtight construction, or if a ue draught stabiliser
has been tted. The required open air vent sizes are as follows:
Table 4 - Additional Room Ventilation Required
Standard build dwellings {air
permeability >5.0m³ /(h.m²)}
Westcott 5 Westcott 8
No Flue Stabiliser Not Required 17 cm²
With Flue Stabiliser 15 cm² 41 cm²
Airtight build dwellings {air
permeability ≤5.0m³ /(h.m²)}
Westcott 5 Westcott 8
No Flue Stabiliser 28 cm² 44 cm²
With Flue Stabiliser 43 cm² 68 cm²
An extractor fan must not be used in the same room as this
appliance.
Floor Protection & Installation Clearances
In all instances the stove should be positioned on a non-
combustible hearth. The construction of the hearth must conform
to Building Regulations, must be rm, non-combustible and capable
of supporting the stove. Care should be taken to ensure the stove
is level and the hearth is secure. The hearth itself should not be
less than 125mm thick, including the thickness of the oor and
any decorative top surface (e.g. tiling). Allow an apron of at least
300mm at the front of the stove in case of spills when de-ashing.
(Fig 6) shows the minimum distances required from the hearth
edge to the sides of the stove.
- 2 -
The stove can also be recessed in a suitable sized replace. We
recommend a permanent free air gap of at least 150mm should
be left around the sides where possible and 300mm around the
top to obtain maximum heat output and for access to the rear of
the stove. Place the product in the desired location on reproof
hearth taking note of installation clearances from adjacent walls
(Fig 7). Adjust the screws on the bottom of the feet to ensure the
stove is level and steady (see ‘A’ Fig 2). The stove can be screw
xed to the oor when placed in the desired position, using the
holes provided in the feet.
Table 5 shows the minimum safe distances to combustable
materials that must be observed. Any surrounding combustible
material should not exceed 80°C.
Table 5 Sides Rear
Westcott 5kW 600mm 400mm
Westcott 8kW 600mm 480mm
Flue Pipes
The ue pipe used to connect to the stove should be made of
cast iron, 316 grade stainless steel or vitreous enamelled steel,
nominal thickness 1.2mm. The diameter of the ue pipe should
be 125mm (5”) for the Westcott 5kW and 150mm (6”) for the
Westcott 8kW models.
Connect the ue pipe to the stove making sure that it ts snugly
into the base of the ue collar (Fig 5). Seal the collar and ue
connection with re cement or with other suitable high temperature
sealant. Add ue sections as required; note that all ue sockets
must face upwards. Ensure that the ue pipe end is no closer
than 76mm to the side or rear of the chimney walls. It is essential
that all connections between the stove and the chimney ue are
sealed and made airtight.
Avoid using bends greater than 45° to the vertical (Fig 8). All ue
pipes should be as close to vertical where possible. For rear ue
connection the length of the horizontal run of the ue pipe should
not exceed 150mm (Fig 9). Both chimney and ue pipe must be
accessible for cleaning and if ALL parts of the chimney cannot be
reached, a soot door must be tted to enable this to be done.
Existing Fireplace
An existing replace opening can be bricked up or sealed with a
register plate, 2.5mm sheet steel or concrete. A short length of
ue pipe may then be used to connect the stove to the chimney.
Ideally the old replace should be lled in so that there is a smooth
streamlined entry into the ueway. (Fig 9)
Typical installation for Inglenook Fireplaces
Inglenook replaces can have very large bore chimneys (Fig 10).
Check with your installer – you may need a stainless steel exible
ue liner for solid fuel tting.
Flue Damper (Not Supplied)
When burning wood, a ue damper may be tted to reduce the
draught through the stove if the draught is too high. When the
damper is set in the open position the chimney draws at full
draught, increasing the volume of air ow through the stove and
ue. Shutting the damper restricts the ow, slowing the rate of
burning. The damper should be tted to the stove ue and should
be the same size as the ue pipe. As a rule it should be tted no
closer than 700mm from the ue outlet of the appliance.
A ue damper should not be tted when burning solid fuels
other than wood.