LogFire LF6 Installation & Operating Instructions Manual

1

Model

LF6

Weight

120kg

Nominal Heat Output

6kW

CONTENTS

OPERATING INSTRUCTIONS

Lighting the fire 2
Firebox linings and baffle 2
Woodburning tips & theory 3
Running temperatures 3
Cleaning & Maintenance 3

INSTALLATION INSTRUCTIONS

Building regulations 4
Positioning & clearances 4
Chimney 4
Flue connection 5
Problem solving 5

LogFire Stoves & Flue Ltd
Britannia House, Junction Street
Darwen, Lancashire, UK, BB3 2RB
T: 0044(0) 1254 700204
F: 0044(0) 1254 700251
E: [e-mail]
W: www.logfirestoves.com
T: @logfirestoves.com
F: www.facebook.com/logfirestoves

English

Congratulations and Thank you for

purchasing your new stove from

This stove is designed for intermittent use
and is tested and manufactured as a closed
appliance for burning wood to BSEN13240
standard. LogFire Stoves & Flue Ltd
recommend that this appliance is installed by
a HETAS registered Installation engineer or
competent person. Failure to comply will
invalidate the manufacturer’s warranty.

Installation & Operating I n s t r u c t i ons

2

Operating Instructions

Lighting the stove

Before lighting the stove for the first time please ensure all firebrick linings and other internal
components are in position (fig 1) and that all packaging has been removed.

When lighting your stove for the first time it should not be stoked excessively as all materials
must be given time to adapt to the effects of heat. Your stove has been painted with specialist HT
paint and oven cured within our manufacturing process, however upon initial lighting of the stove
further curing may occur and a slight smell may be evident. We recommend that windows and
doors are left open during this time, as airing the room will allow this to disappear.

Step 1 Open the air control fully using the tool (fig 2)

Step 2 Place rolled up crumpled newspaper at the back of the stove. Place small tinder/kindling

on top of the newspaper and then a few larger pieces of wood on top of this. Light the newspaper
and close the door .NEVER USE FLAMMABLE LIQUIDS

Step 3 Allow the fire to burn until all the pieces of wood are alight and burning. More and larger
pieces of wood can now be added. Never add so much wood that it is in danger of coming over
the fuel bar.

Step 4 Once the fire is established the air control can be reduced to maintain a steady burn rate.

Do not run the stove with door open

All parts of the stove become hot when in operation. Use the tool provided to operate the air
control and the glove to open the door handle.

Fig 1
Fig 2

Notes on Wood burning

The first stage of the fire, just after lighting, is usually the smokiest because the cold wood and cold stove take heat away from the flames.
During this stage ensure the air inlet is fully open to increase the flame temperature. It may appear that this initial hot burn allows too much
heat straight into the flue system however this is a necessary part of an efficient fire. The additional heat primes the chimney to produce a
strong draft and also helps keep the chimney/flue clean by loosening creosote that may have been deposited by a previous fire. The hot initial
burn also drives moisture from the firewood and gives an ignition source for the smoke that is released from the wood.
Only make small changes. Do not try to add too much fuel at once. Adding fuel gradually will help maintain a steady optimum temperature
and burning rate so that the stove burns efficiently and cleanly. Adding too much fuel will dramatically reduce the temperature inside the
firebox. After adding large pieces of wood/logs it is recommended to increase the air opening slightly until the new fuel begins to burn and
the stove returns to temperature.
This also applies to the air control. Adjusting it gradually will help maintain a steady combustion rate. In most instances you will arrive at the
best combustion air settings yourself, as the height and diameter of the chimney as well as the quality of the firewood are decisive factors in
determining how your stove is best set.
Use a piece of newspaper to wipe the inside of the window glass before lighting the stove each time to prevent the gradual build-up of
deposits.
Small, hot fires are more efficient than large slumbering fires. Most of the energy in burning wood is released as a bright flame. The
turbulence in the flames creates good mixing between the combustion air and the gases that are released from the wood as it heats up. The
heat of the fire ignites and burns these gases. In contrast, the dense smoke from a slow, smouldering fire is potential heat energy that
escapes up the chimney and either clings to the chimney flue as creosote or pollutes the atmosphere. To gain the most heat from each burn
the wood should be flaming throughout the burn cycle until it is reduced to ash.
Should any regular slow burning occur it is good practice to burn a good, hot stove at regular intervals to keep the chimney clean and dry.
When refuelling, place wood towards the back of the stove where it will burn at a higher temperature.

3

Running Temperature

Thermometers are available that attach to the flue pipe directly above the stove and provide an aid
to running the stove at the correct temperature.

150°C-300°C

The flue gases should be in this temperature band for the safest, most efficient and most economical
operation of your stove.

Below 150°C

This may cause the condensation of wood gases and the build-up of tar in the chimney, dirty the
stove glass and result in the inefficient burning of fuel.

Above 300°C

Too hot. Heat will be wasted up the chimney. Excess heat may damage the stove or ignite and
existing accumulation of tar resulting in a chimney fire.

Over Heating

Should the stove be allowed to get too hot and is overheating, close the air control fully using the
tool. Keep the fire door closed and allow the fire to burn down.

Chimney Fire

In the event of a chimney fire dial 999 and ask for the Fire Service. Fully close the air control and keep
the stove door closed. Move any combustibles away from the stove and chimney. Check any other
rooms that the chimney passes through and move and combustibles away from the chimney. Before
using the stove again after a chimney fire, the chimney should be cleaned and inspected by a
qualified person.

Cleaning the glass

We recommend wiping the glass after a fire to prevent any build-up of deposits. This is best done
using a paper towel or newspaper to avoid scratching the glass.

Types of fuel

Wood needs to be well seasoned before it is burnt. There are many types of wood available for fuel
and they take varying amounts of time to season. As a general guide wood should be cut to length,
split and then stacked under cover with sides open to air for at least 12 months. Wood is ready for
burning when radial cracks appear in the end of the logs and moisture content is no more than 20%.
It is then good practice to store the wood in a log basket inside your property for a few days prior to
its use. The internal width of the firebox of the LFS 10 is 495mm therefore the firewood should be no
longer than this.
DO NOT burn unseasoned wood in your stove. DO NOT burn particle board, lacquered, painted or
treated wood, plastics, rubber or liquid fuels. Should the stove burn any of these materials the
warranty will be void. The stove is not suitable for burning solid fuel such as briquettes/coal/coke or
smokeless fuel. The stove should not be used as an incinerator.

4

Ashes

The ashes should only be removed when the fire is out and has been left to cool completely. The log
retaining bar can be removed for easier access (fig 3). Wood burns well on a thin layer of ash and leaving
this when cleaning also provides protection for the base insulating bricks.

Maintenance & Cleaning

Any maintenance of the stove should only be carried out when the stove is cold. Daily maintenance
should be limited to vacuum cleaning the stove externally, or brushing down with a soft brush. Never
use spirits to clean the stove, as this will remove the paint. Regularly check the flue exit from the stove
to make sure there is no build-up of deposits that will restrict the exit of the flue gases.

Note: The stove must not be modified in any way. Any changes will invalidate your warranty. Any replacement parts
must be official LogFire Stoves parts.

Chimney Sweeping

The chimney should be swept a minimum of once per year. This must be carried out by a registered
competent person. If the stove is used more regularly the chimney should be swept more often. Your
stove should also be given a visual inspection every time the chimney is swept. These checks should
include the rope seals, door handle, firebricks and baffle. Any build of soot and ashes within the stove
should be removed.

Fire bricks

The fire bricks are manufactured from vermiculite. Vermiculite is a non-combustible, fire resistant board
with excellent thermal insulation properties. As vermiculite is a porous material it may over time
become worn and damaged. Please handle with care especially when re-fuelling the stove. The
Insulation only needs replacing when it has deteriorated to an extent that the insulation is no longer
protecting the steel body of the stove from the flames. The insulation is not covered by the
manufacturer’s warranty.

Glass

If the glass is blackened by soot it can be easily cleaned using one of the many specialist stove glass
cleaning products available. Our technical department can offer advice on these products.

Surface

The high temperature paint finish should require no further treatment. Any damage or wear on small
areas of the paint finish may be remedied using our high temperature aerosol paints. Please read the
instructions on the aerosol carefully before applying.

Fig 3

5

Installation

Building Regulations

Installation of your LogFire Stove must comply with all local building regulations, including those referring to national and European
standards. We advise prior to any installation a full site survey is conducted by an installation engineer recognised within an industry
standard such as NACS or HETAS to check the suitability of your chimney and appliance. Document J of the building regulations
contains further information regarding the installation of solid fuel appliances and can be viewed at

http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADJ_2010.pdf or by following the link from our website.

Ventilation

The appliance requires fixed ventilation supplying a minimum of 550mm² free air. Any air inlet grilles should be positioned so that
they are not liable to blockage. An air extraction device shall not be used in the same room as the appliance unless adequate
additional ventilation is provided. Other heating appliances requiring air for combustion shall not be used in the same room as the
appliance unless adequate additional ventilation is provided.
Stoves need a supply of air for combustion, and to evacuate the flue gases otherwise they will not work. Without an air supply the
stove will not light and smoke is likely to pour out into the house. The smoke will not be able to be drawn up the chimney as this
requires air movement up through the chimney which is not possible if there is no source of air. If your stove smokes or does not
burn very keenly, but this improves when you open a window then this is a sign that you need to install some ventilation. We
recommend you discuss your ventilation requirements with your local LogFire Stove authorised retailer/installer. Any airbricks or
grilles fitted should be positioned so that they are not liable to blockage. If other appliances requiring ventilation operate within the
vicinity of the stove there must be adequate ventilation provided for both appliances running simultaneously. NOTE Extractor fans
when operating in the same room or space as the stove may cause problems.

Load-bearing capacity of the floor

Before installing the stove, you must ensure that the load-bearing capacity of the floor can withstand the weight of the stove and
any flue pipes and connections. The weight of the stove is 120Kgs.

Hearth

The stove should be installed on a non-combustible hearth. The hearth should extend to a distance of 225mm in front of the stove
and 150mm to each side measured from the door of the combustion chamber. Please refer to document J of the building regulations
for further information on hearth requirements. Please note this stove has a certified maximum hearth temperature of 42°C.

Clearances

The minimum clearance to combustible materials is 400mm to the sides of the stove, 700mm to the rear of the stove and 450mm to
the 6" flue pipe. Adjacent walls should be of suitable non-combustible construction, preferably brickwork.. A minimum of 80mm
clearance should be left at the back and sides of the stove to allow free air movement and for heat from the stove to enter the room,
and there should be a minimum clearance around the 6" flue pipe of 225mm.

Chimney Requirements

An existing chimney or a new flue or chimney installation should be given a visual inspection to check that it is in good order, clear of
obstructions and is of suitable size and type for the stove. It may be necessary to sweep the flue – which should always be done prior
to fitting a stove or lining a chimney. We also recommend a smoke test is carried out to check for gas tightness and chimney draft.
We recommend lining and insulating your chimney. There should be access to the chimney to allow for sweeping.

Air Damper

It is recommended that chimneys with a strong updraft be fitted with a flue damper or draught stabiliser to allow the chimney
draught to be regulated. No damper should close the flue way completely, 20% of the total opening of the chimney or flue pipe must
remain open at all times.

Carbon Monoxide Alarm

An approved carbon monoxide alarm with a 7 year life sealed battery must be installed when any Solid Fuel appliance is installed.
Carbon Monoxide alarms need to meet European safety standards and must be audible. They must be fitted in accordance to the
manufacturer’s instructions. Please Note: an alarm is no substitute for regular maintenance and chimney sweeping.

6

Flue

The minimum flue draught required for nominal heat output is 12 Pascals. At nominal heat output
the flue gas temperature will be in the region of 262°C. The appliance should not be connected to a
shared flue. The design of the flue installation should allow access for sweeping.
The stove has both rear and top flue connections. The figure on the right shows the flue connection
options. Seal the flue connections with fire cement or a high temperature rope seal. The flue
blanking plate should be positioned over whichever outlet is not being used.

Figure 5 below shows a typical installation for which you would need:

A register plate – this plate is used to seal off the throat of the fireplace and has a hole for

the flue pipe, access for sweeping and if required a bracket to support the flue.

The 6” (150mm) flue pipe required from the stove to the register plate.

Operational Problems

Blackened Glass

The wood is too damp. Only use wood that has been stored for at least 12 months under

cover and ideally with a moisture content less than 20%

Insufficient intake of air from the air control. Open the air control further.
Insufficient ventilation
The stove is being run at too low a temperature

Smoke in the room when refuelling

Poor chimney performance – consult chimney sweep or Installation engineer
Check the position of any fitted flue damper to make sure it is in the open position
Never open the door when there are high flames on the wood

Uncontrollable Combustion

Damaged door seal. Fit new seal
If there is excessive chimney draft – fit a draft stabiliser in the flue pipe – consult a

chimney sweep or the Installation engineer

Fig 4

Fig 5