Dimplex Westcott 12kW Stove User Manual - Page 6

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1. General Maintenance

Any remedial work to the chimney flue should be carried out by a

suitably Qualified Engineer. A flue draught of minimum 12 Pascal

is required for satisfactory appliance performance.

An extractor fan must not be used in the same room as this

appliance.

Installation Clearances

The stove can be recessed in a suitable sized fireplace but a

permanent free air gap of at least 150mm must be left around the

sides and 300mm around the top to obtain maximum heat output

and for access to the rear of the stove (Fig 6).

Table 4 shows the minimum safe distances to combustable

materials that must be observed. Any surrounding combustible

material should not exceed 80°C.

Table 4

Sides

Westcott 5kW

600mm

Westcott 8kW

600mm

Floor Protection

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 firm, 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 floor 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).

Place the product in the desired location on fireproof hearth taking

note of installation clearances (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 fixed to the floor when placed in

the desired position, using the holes provided in the feet.

Flue Pipes

The flue 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 flue pipe should

be 125mm (5") for the Westcott 5kW and 150mm (6") for both the

Westcott 8kW & 12kW models.

Connect the flue pipe to the stove making sure that it fits snugly

into the base of the flue collar (Fig 5). Seal the collar and flue

connection with fire cement or with other suitable high temperature

sealant. Add flue sections as required; note that all flue sockets

must face upwards. Ensure that the flue 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 flue are

sealed and made airtight.

Avoid using bends greater than 45° to the vertical (Fig 8). All flue

pipes should be as close to vertical where possible. For rear flue

connection the length of the horizontal run of the flue pipe should

not exceed 150mm (Fig 9).

Both chimney and flue pipe must be accessible for cleaning and

if ALL parts of the chimney cannot be reached, a soot door must

be fitted to enable this to be done.

This product should not be installed on a shared flue.

- 2 -

Existing Fireplace

An existing fireplace opening can be bricked up or sealed with a

flue pipe may then be used to connect the stove to the chimney.

Ideally the old fireplace should be filled in so that there is a smooth

streamlined entry into the flueway. (Fig 9)

Typical installation for Inglenook Fireplaces

Inglenook fireplaces can have very large bore chimneys (Fig 10).

Check with your installer – you may need a stainless steel flexible

flue liner for solid fuel fitting.

Flue Damper (Not Supplied)

When burning wood, a flue damper may be fitted 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 flow through the stove and

Rear

flue. Shutting the damper restricts the flow, slowing the rate of

400mm

burning.

480mm

The damper should be fitted to the stove flue and should be the

same size as the flue pipe. As a rule it should be fitted no closer

than 700mm from the flue outlet of the appliance.

A flue damper should not be fitted when burning solid fuels

other than wood.

Flue Deposits

If the chimney was previously used as an open fire, it is possible

that the higher flue gas temperatures generated by the stove may

loosen deposits that were adhering to the inner surface of the flue

pipe and may cause blockage of the flue pipe. We recommend that

in such a situation a second sweeping of the chimney should be

carried out within one month of initial stove use after installation.

Also lock or close off any existing dampers in the flueway.

Commissioning

Upon completion of installation, the stove and flue system should

be tested by a suitably qualified 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 flue 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

flue and be seen to exit from the flue terminal. Complete the test

with all windows and doors shut in the room where the appliance

is fitted. 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 flue system making sure there is

adequate air supply to the room (as per Building Regulations).

Light the appliance and slowly increase the temperature to

operating levels. Open the main fire 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 fire to go out and

recheck the flue system and ventilation.