Dimplex Westcott WST4i User manual

The product complies with the European Safety Standards EN13240 for Room heaters red by solid fuel.
08/51337/0 - Issue 1
UK
Westcott 4.3kW Multifuel Inset Stove
For Standard 16” Fireplace Opening
Please hand these instructions to the stove user when installation
is complete. Leave the system ready for operation and instruct the
user in the correct use of the appliance and operation of controls.
Installation should only be carried out by a suitably qualied
installer that is registered with HETAS (UK) or with the Irish
Nationwide Fireplace Organisation (INFO).
Installation must comply with Building Regulations.

1
3 4
Table 1 - Dimensions A B C D E F G H J K L
Westcott Insert 598 492 538 255 393 105 185 190 88 365 147
Note: All Dimensions in mm. Dimensions stated may be subject to a slight ± variation. ( 25.4mm = 1”)
Table 2 - Technical Specication Westcott Inset WST4i
Wood Solid Fuel
Nominal heat output kW 4.3 3.9
Efciency %80.9 75.0
CO Emission (@13% O2) % 0.67 0.56
Flue Gas Temp °C 215 162
Flue Gas Mass Flow g/s 2.9 3.8
Refuel Period hr 1
Safe Distance to Combustible Materials mm 275mm to sides/front, 295mm to top
Flue Outlet Size mm 147
Product Weight kg 75
A
BH
C
F
E
D
G
K
J
L (Dia)
45˚
C
A
B
2

1
2
3
7
56
7
9 10
8
Z
CONSTRUCTIONAL HEARTH
NON COMBUSTIBLE
125mm THICK MINIMUM
Z = At least 150mm or to a
suitably heat resistant wall
min 225mm
Z
non combustible wall
min thick Y
fireback and
insulated infill
Fireplace Opening
400mm (16”)
X
X
6
4
5
Fireback to
BS1251
Lintel or
Gather
Constructional Hearth
min 125mm thick
min 75mm
Change in flooring
level to distinguish
hearth
Clay Flue pipe
Typical installation

IMPORTANT: THESE INSTRUCTIONS SHOULD BE READ CAREFULLY AND RETAINED FOR FUTURE REFERENCE
Important Safety Advice
Please read these instructions carefully before installing
or using this appliance. Failure to do so may result in
damage to persons and property.
Installation of this appliance must be carried out by
a suitably qualied competent person in accordance
with all Building Regulations, including those referring
to Local Authority Bye-Laws, National and European
Standards and Codes of Practice.
Do not install this appliance on a shared ue.
This appliance operates at very high temperatures and
retains its heat for a period after use. Do not touch any
surfaces while in use. All persons including children and
the inrm should be warned of this and not allowed to
touch any surfaces while in use. Please use a suitable
reguard to prevent contact when in use.
Do not place any photographs, paintings, TV’s or other
combustible items near the appliance as exposure to
hot surfaces will cause damage. Maintain safe distances
from combustibles in all cases in accordance with these
instructions – please refer to installation.
The operator must use the tools provided. The mitten
provided is a tool.
Do not t an extractor fan in the same room as this
appliance.
Ensure that there is adequate ventilation in the room in
accordance with building standards. Do not obstruct any
of the air inlets or outlets on the appliance.
A ue damper should not be tted when burning solid
fuels other than wood.
This appliance is for domestic heating use only in
accordance with these operating instructions. Do not
make any unauthorised changes to the appliance.
Only use recommended fuels. Do not burn petroleum coke
fuels, household waste or plastic in this appliance.
Burn only fuels with a low moisture content - burning soft
or wet fuels such as unseasoned timber or peat will only
result in a build up of tar in the stove and the chimney
and will cause staining of the glass.
Do not use ammable liquids to ignite the re.
Avoid the use of aerosols in the vicinity of the stove when
it is in operation.
Clean your chimney at least once a year and clean the
ue way monthly to ensure there are no blockages. Do
not allow a build up of ash to occur in the ash pan as this
will cause the grate to burn out prematurely.
Regular maintenance should be carried out by a
Competent Engineer.
Health and Safety Precautions
Handling: Adequate facilities must be available for the unloading
and handling of this appliance. This product is heavy and should
be handled with care. When handling or servicing this stove care
should be taken to avoid the possibility of personal injury. Use
protective clothing.
Fire Cement/Glue: Some types of re cement/glue are caustic
and should not be allowed to come into contact with the skin. Use
suitable protective gloves when handling. In case of contact, wash
immediately with plenty of water.
Asbestos: This appliance contains no asbestos. If there is a
possibility of disturbing asbestos as a result of installation then
specialist guidance must be sought prior to installing.
Please Note: Any white deposits on the stove joints are caused
by humidity reacting with the joint sealant. These deposits are
not cause for alarm and may be brushed off using a soft cloth.
If required the joints may be blackened again with a proprietary
stove polish.
Installation Instructions
General
These instructions give a guide for the installation of the stove but
in no way absolves the installer from responsibilities to conform
to all relevant standards relating to the installation of solid fuel
appliances.
This stove is designed to be recessed in a standard 16” sized
replace opening. The stove is only suitable for use on a replace
and chimney that has been tted for use with solid fuel. The
replace backpanel and hearth must have the necessary expansion
joints and the backlling suitable for solid fuel use.
We recommend that for UK installations a HETAS registered
installer should be used, who will be able to give a Certicate of
Compliance that installation complies with Building Regulations.
In Ireland a registered installer from the Irish Nationwide Fireplace
Organisation should be used.
Please note that to the best of our abilities these instructions are
correct at time of printing, however we cannot be held responsible
for any differences in legislation which may occur in the future.
Chimney
Before installing, check the chimney is in good condition; dry and
free from cracks and obstructions. The diameter of the chimney
ue should not be less than 125mm and not more than 200mm.
If any of these requirements are not met, the chimney should be
lined by a suitable method by a qualied person.
The chimney height and the position of the chimney terminal should
conform to Building Regulations. If you have any doubts about the
suitability if your chimney, consult your local dealer or stockist.
The chimney must be swept before connection to the stove and
the stove should be removed to clean the chimney at least once
a year by a qualied chimney sweep.
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.
UK
Wescott 4.3kW Multifuel Inset Stove (WST4i)
- 1 -

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 a blockage. 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.
Stove Assembly
Remove the straps and lift off the upper box 1. (Fig 3).
Remove the plastic bag, Open the stove door and remove all 2.
the contents including the xing bar (Fig 4).
Carefully tip the stove onto its back and remove the M8 screw 3.
using a 14mm spanner (Fig 5).
Secure the xing bar using the hinge pins and after feeding 4.
the tightening bar through the xing bar, add the washers and
wingnut onto the end (1 & 2, Fig 6).
Open the sealing kit supplied and glue sealing rope into the5.
channel on rear edge of appliance (3, Fig 7). Use suitable
protective gloves when handling glue to prevent contact. In
case of contact, wash immediately with plenty of water.
Remove the grate and the bafe plate 6. (4 & 5, Fig 8). Place the
inset stove into position in the replace and mark the intended
position of the xing screw through the hole in the bottom of
the appliance (6, Fig 8). Remove the stove and drill a hole
then insert the rawl plug supplied. Re-position the stove and
screw into place.
Create a seal with the fascia of the replace making sure 7.
the rope seal comes into contact with the fascia. Place
hand through the stove collar and tighten the wingnut on
the tightening bar (7, Fig 7). The xing bar creates pressure
when it contacts the chimney/lintel. The stove should be tightly
sealed to the replace fascia.
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:
Standard build dwellings {air permeability >5.0m³ /(h.m²)}
No Flue Stabiliser No additional vent required
With Flue Stabiliser 13 cm²
Airtight build dwellings {air permeability ≤5.0m³ /(h.m²)}
No Flue Stabiliser 24 cm²
With Flue Stabiliser 37 cm²
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.
An extractor fan must not be used in the same room as this
appliance.
UK
- 2 -
Flue Damper/Draught Stabiliser (Not Supplied)
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 fuels other
than wood.
Floor Protection & Installation Clearances
In all instances the stove should be positioned on a non-combustible
hearth and located in a suitable solid fuel replace recess. The
construction of the hearth and replace recess must conform to
Building Regulations, must be rm, made from non-combustible
materials 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 225mm at the front of the stove in case
of spills when de-ashing and 150mm on either side (Fig 9 & 10).
All walls adjacent to the hearth should be made from solid non
combustible material and be made with minimum thickness as
follows:
Appliance distance
X from wall
Min WallThickness
Y
Min solid wall height
300mm above the
appliance and 1.2m
above the hearth
less than 50mm 200mm
50mm and over 75mm
The minimum safe distances to combustable materials that
must be observed is 275mm to sides/front, 295mm to top.
Any surrounding combustible material should not exceed 80°C.
Commissioning
Upon completion of installation, allow a suitable period of time for
any re cement or mortar to dry out. The stove and ue system
should then be tested by a suitably qualied person to make sure
it is safe for normal use. A smoke draw test should be completed
to check for soundness of joints and seals and also that all smoke
and fumes are taken from the appliance up the chimney and
emitted safely.
First warm the ue with a blowlamp or similar for about 10 minutes.
Place a lit smoke pellet on the centre of the grate with the air
controls open. Close the door – the smoke should be drawn up the
ue and be seen to exit from the ue terminal. Complete the test
with all windows and doors shut in the room where the appliance
is tted. If a ceiling fan is present it must be operated on max for
the duration of the test. If there are any extraction fans in adjacent
rooms these too must be operated on maximum setting during the
test with the interconnecting doors open. If any spillage occurs,
recheck the suitability of the ue system making sure there is
adequate air supply to the room (as per Building Regulations).
Light the appliance and slowly increase the temperature to medium
operating levels. The stove should not be run at full output for the
rst 3-4 burn cycles. Open the main re door when the appliance
reaches normal operating condition and carry out a spillage test
using a smoke match or pellet around the door opening. If any
spillage occurs, open all windows, allow the re to go out and
recheck the ue system and ventilation.

Operating Instructions
Please read fully these operating instructions and advise any other
users of the correct operating procedures for this stove.
Warning: The door and operating handles become hot when
the stove is in use. For your safety use the glove provided.
This stove will remain hot for a considerable time after the
re has extinguished. This stove should not be operated with
the door left open.
Initial Firing of Stove
We recommend that you have 3-4 small res before you operate
your stove to maximum heat output. This is to allow the paint to cure
and the castings to relax and consolidate location. We recommend
this ‘running in’ procedure after long idle periods to preserve the
life of the stove. During this you may notice an unpleasant smell
as paint and re cement cures. It is not toxic but for your own sake
we would suggest that during this period you leave all doors and
windows open.
Air Controls
Primary air is controlled via the sliding vents (Fig 2a) in the bottom
of the door; this provides a conventional air draught to the bed of
the re. Moving the slider to the right increases the air intake, to
the left reduces the air intake.
Secondary air is controlled via the sliding vent (Fig 2b) above the
door. It is this ‘Airwash’ that keeps a clean and uninterrupted view
of the re, also aiding in good secondary combustion of fuel and
reducing emissions into the chimney and environment.
Lighting the Stove
Place re lighters or paper and kindling on the grate. Light the
re at base leaving all air controls open. Allow the fuel to reach a
steady glow and build the re up gradually. Once you have a good
re established across the grate bed, further fuel can be added as
required. When your fuel is well alight you can start to restrict the air
intake to achieve desired burn rate. For wood burning the primary
air control can be closed fully when the re is well alight.
Running the Stove
When your fuel is well alight you can start to restrict the primary
air intake. If you are only burning wood the primary air control can
be fully closed. If you are burning solid fuel you will require more
primary air. Your stove is burning with maximum efciency when
a bright re is achieved using minimum air inlet.
With a full load the stove will need to be refuelled approximately
every 1.5hrs. Care should be taken that the stove is not over lled
- fuel should not be lled above the base of the bafe plate. The
stove is not suitable for overnight burning.
Notes on Wood Burning
Wood burns best on a bed of ash and it is therefore only necessary
to remove surplus ash from the grate occasionally. Burn only
dry, well seasoned wood (< 20% moisture), which should have
been cut, split and stacked for 12 months with free air movement
around all sides of the stack to enable it to dry out. Burning wet or
unseasoned wood will create tar deposits in the stove and chimney
and will not produce a satisfactory heat output. When loading wood,
make sure that the end grain of the wood in the stove is pointing
away from the glass otherwise the moisture and gases coming
from the end grain of the wood will dirty the glass.
The maximum log length that should be used is 200mm (8”).
Notes on Solid Fuel burning (Other than Wood)
Always de-ash the grate before refuelling and do not let the ash
build up to the underside of the grate bars. Solid fuel produces
ash, which if allowed to build up will stie the air ow through the
grate and will eventually cause the re to die. It is important it is
to empty the ash pan after each ring of the stove. Air passing
through the rebed cools the grate. Distortion or burning out of the
grate bars is nearly always caused by ash being allowed to build
up on the underside of the grate. With some solid fuels a residue
of burnt fuel or clinker will accumulate on the grate. Allow the re
to go out periodically to remove this.
We recommend the majority of approved manufactured
smokeless fuels. Note that different types of fuel will give different
performances. Should any difculties arise over fuel quality or
suitability, consult your local supplier or contact the Solid Fuel
Advisory Service. Do not use this stove as an incinerator for
household waste as fumes from plastic, etc will cause pollution to
the atmosphere and will cause damage to the stove.
Petroleum coke fuels or household waste should not be
burned on this appliance.
Shutting Down
To shut down the stove, close the primary air controls and then
the secondary air controls by moving both sliders to the left. If the
controls are left in this position the re will be starved of air and
will go out. To revive the re open the primary air controls rst,
then the secondary air.
De-Ashing
This insert stove is tted with a removable cast iron grate. It is
important to de-ash the stove regularly to prevent ash build up
which may impede the primary air input.
Where possible, it is best to wait until the stove and ash has cooled
before removing the ash pan. To remove, open the stove door by
turning the handle anti-clockwise (Fig 2c) then using the hand tool
provided lift the ash pan out of the re (Fig 4). For efcient burning
of your appliance, make sure the grate is clear of burnt debris; e.g.
nails, etc. Dispose of the ash into a non combustible container until
the ash has cooled down completely to room temperature.
If shutting down the stove for long periods (e.g. for summer months)
make sure that all ash is removed from the stove and that the
chimney ue ways and bafe plate are brushed clean. When the
stove is cold a vacuum cleaner may be used to remove any residual
ash or soot. Close the door and leave all air inlets open fully. This
action will ensure air circulation through the appliance and will help
to avoid corrosion and condensation within the appliance during
this shut down period.
Safety Notes for Your Guidance
FIRES CAN BE DANGEROUS.
Always use a re guard in the presence of children, the elderly
or the inrm. Inform all persons the dangers of high temperatures
during operation of the appliance including the stove pipe.
Use operating tool and glove provided.
DO NOT OVER FIRE.
It is possible to re the stove beyond its design capacity. This could
damage the stove, so watch for signs of over ring. If any part of
the stove starts to glow red, the stove is in an over re situation
and the controls should be adjusted accordingly to reduce air
intake. Never leave the stove unattended for long periods without
adjusting the controls to a safe setting. Careful air supply control
should be exercised at all times.
UK
- 3 -

Warning - Fume Emissions
Properly installed and operated, this appliance will not emit fumes.
Occasional fumes may occur if the door is open when de-ashing
and refuelling. Persistent fume emission must not be tolerated. If
fume emission does persist, then the following immediate action
must be taken:
1. Open doors and windows to ventilate the room.
2. Let the re out, or eject and safely dispose of fuel from the
appliance.
3. When the stove has cooled, check for chimney ue blockage
and clean if required.
4. Do not attempt to relight the re until the cause has been
identied. If necessary seek professional advice.
General Maintenance
Bafe Plate
This should be removed at least once a month to prevent any
build up of soot or ash, which could lead to blocked ue ways and
dangerous fume emission. This must be done when the stove
is cold. To remove, lift plate up and rotate to clear xings. Make
sure the plate is returned to correct position when placed back in
the stove.
Stove Body
The stove is nished with a heat resistant paint and this can be
cleaned with a soft brush. Do not clean while the stove is hot,
wait until it has cooled down. The nish can be renovated with a
suitable brand of paint.
Glass Panels
Clean the glass panels when cool with a proprietary glass cleaner.
Highly abrasive substances should be avoided as these can
scratch the glass and make subsequent cleaning more difcult. Wet
logs on heated glass, a badly aimed poker or heavy slamming of
the doors could crack the glass panels. The glass will not fracture
from heat.
Chimney
Check your chimney each year before starting to use your stove
for the winter. Birds may have nested in the chimney or masonry
may have cracked. Both chimney and ue pipe must be swept at
least once a year by a Qualied Chimney Sweep.
Troubleshooting
1. Poor heat output
a. Stove too small for room: Seek advice from a Qualied Heating
Engineer as to (kW) output required for the room size. As a
guideline the volume of the room in cubic feet divided by 500;
e.g. room 15’x15’x8’ would require 3.6kW approx.
b. Chimney and/or ue pipe restricted, room ventilation restricted:
On installation these should have been checked but regular
maintenance is necessary as conditions can change; e.g. soot
build up, birds nesting, masonry fall, dust build up or furniture
blocking vents.
c. Poor quality fuel: Only burn dry seasoned timber, soft woods
have a lower heat output than hard woods per hour.
2. Dirty Glass Panel
a. Generally caused by poor fuel quality, see (1c)
b. Use secondary air slide (Airwash) for glass panel
c. Fire burning too low, open air vents on stove to create hot re;
this may ‘burn’ glass clean.
d. If glass requires cleaning use glass cleaner recommended by
your supplier; only use glass cleaner on cold glass. DO NOT
USE any abrasives or scrapers as these will scratch glass and
increase future tar build up making it harder to clean.
3. Unburnt Fuel in Firebox
Insufcient air reaching fuel. Open primary air slide, this will supply
combustion air to burn fuel fully (unless it has reached a ‘point of
return’). Check if the ash pan is full and empty if required. De-ash
to make sure the grate is not blocked and check for jammed clinker
or nails when the re is out and the stove has cooled.
4. Smoke and Fumes Entering Room
These are very dangerous and must NOT be tolerated. Open
window and allow re to burn out. Seek expert advice immediately.
DO NOT USE stove until the problem is solved.
5. Chimney Fire
Identied by loud roaring sounds, dense smoke and sparks emitting
from chimney.
1) Raise the alarm to let others in the house know.
2) Call the Fire Brigade.
3) If possible, shut down the air supply by closing air vents and
DO NOT open the stove door.
4) If possible, move back any furniture, rugs or other items that
could catch re.
5) Retire to a safe distance from the house until the re has gone
out and it is safe to return.
Regular chimney maintenance will prevent chimney res. Seek
advice from a Qualied Chimney Sweep. Chimneys must be
checked annually.
After Sales Service
Your Dimplex Stove is guaranteed against defects arising from
faulty manufacture for 1 year subject to the following conditions.
Failure to comply with these conditions will invalidate the
gaurantee:
The receipt must be kept as proof of purchase. •
Your Dimplex stove must be installed by suitably qualied •
individual (HETAS Engineer or equivalent) and upon
installation a Certicate of Compliance must be presented.
The guarantee is 1 year from date of purchase.•
The guarantee does not cover parts that are deemed to be •
replacable through normal usage of the stove. These include:
glass panels, rope seals, bottom grate or rebars, ashpan,
cast iron liners, bafe plate, log guard.
Only genuine Dimplex spare parts should be used. Parts •
that may need occasional replacement are: cast iron liners,
ashpan, re grate, log guard.
Should you require after sales service or should you need to
purchase any spares, please contact the retailer from whom the
appliance was purchased. Please do not return a faulty product
to us in the rst instance as this may result in loss or damage and
delay in providing you with a satisfactory service. Please retain
your receipt as proof of purchase.
UK
- 4 -

DIMPLEX
MILLBROOK HOUSE
GRANGE DRIVE
HEDGE END
SOUTHAMPTON
SO30 2DF
TEL: [phone]
FAX: [phone]
WEBSITE: www.dimplex.co.uk
Republic of Ireland Tel: [phone]
[c]A Division of GDC Group Ltd.
All rights reserved. Material contained in this publication may not be reproduced in whole or in part, without prior permission in writing of
GDC Group Ltd.