ICS instructions

MANDATORY REQUIREMENTS
Connection to an appliance which is not connected to the fuel supply, should be carried out by a competent person. We recommend the use of HETAS approved installers for solid fuel applications. If installation is carried out by a non HETAS registered installer, the installation must be certified by a local Building Control inspector. Connection to an appliance that is connected to the fuel supply must be carried out by a Gas Safe (Gas) or OFTEC (Oil) registered installer.

The design guide must be read in conjunction with the detailed component installation instructions. For full design and installation details the key referral documents are:

• BS EN 1856-1: Chimneys – System Chimney Products
• BS EN 1856-2: Connecting Flue Pipes
• BS EN 1859: Metal Chimneys – Testing Methods
• BS EN 1443: Chimneys – General Requirements
• BS EN 15287-1: Chimneys. Design, installation and commissioning of chimneys. Chimneys for non-room sealed heating appliances.
• BS 5440-1: Fluing and ventilation for gas appliances of rated input not exceeding 70kW net (1st, 2nd and 3rd family gases).

Specification for installation of gas appliances to chimneys and for maintenance of chimneys.

• Approved Document J: – Combustion appliances and fuel storage systems (England & Wales)
• DFP Technical Booklet L: – Combustion appliances and fuel storage systems (NI)
• Technical Handbook (Domestic & Non Domestic), Section 3 – Environment (Scotland)
• Appliance Installation Instructions and related standards. Other standards covering specific applications will also be relevant and must be adhered to.

Planning permission may be required, and reference should be made to the local Building Control Department.

Ensure all chimney components are available and check them to ensure there has been no damage. Do not use damaged components. Build the chimney up through the previous designed route which should be as straight as possible.

VENTILATION

It is very important that sufficient air for combustion and ventilation is provided to the room containing the appliance, to enable correct and efficient working of the appliance and chimney system. Reference should be made to the appliance manufacturer’s instructions and recommendations are also given in the Building Regulations Document J, CIBSE guidance notes and BS 5440.

 

CARBON MONOXIDE ALARMS

The carbon monoxide alarms should comply with BS EN 50291

Where a new or replacement fixed solid fuel appliance is installed in a dwelling, a carbon monoxide alarm must be provided in the room where the appliance is located.

Please follow manufacturer’s instructions with regards to siting and fixing or alternatively :-

1. On the ceiling at least 300mm from any wall or if it is located on a wall, as high up as possible (above any doors and windows), but not within 150mm of the ceiling and
2. between 1m and 3m horizontally from the appliance.

N.B Provision of a carbon monoxide alarm should not be regarded as a substitute for correct installation and regular servicing.

 

PAINTING

If painting of any external sections is required, it is important to de-grease, dry and prime the exterior surface prior to the application of appropriate heat resistant paint. Schiedel Chimney Systems can provide to special order, chimney sections and accessories painted to an extensive range of British Standard RAL colours – details on application.

Please note that conditions in coastal areas means that corrosion is more likely to occur. Please contact us for advice on any such installation.

 

HANDLING

It is advised that suitable PPE should be used when handling the products.

 

DELIVERY TO SITE AND STORAGE

Components should be carefully transported and off loaded. They should be inspected to ensure they have not been damaged, and should be stored off the ground and under cover so that they are protected from accidental damage and the adverse effects of weather.

Connecting Flue Pipe

 

APPLIANCE/CHIMNEY CONNECTION

Connection to the appliance can be made using Prima Smooth, Prima Plus or alternative approved single wall connecting flue pipes, or ICS.

This must be done by using the appropriate appliance connector. When a single wall connecting flue pipe is used to connect an appliance to the chimney, the lower end of the chimney section must extend a minimum of 425mm below the ceiling. When connecting the appliance to the flue pipe all joints between the flue pipes/appliance outlet must be securely caulked and sealed with non asbestos rope (or suitable alternative) and fire cement on solid fuel appliances and using the appropriate lip seal gasket in the case of condensing appliances.

Any flue pipe connection to the chimney MUST be made in the same room as the appliance.

 

CONNECTION TO DRAUGHT DIVERTER

Where the appliance features a draught diverter the connection should rise vertically from it for at least 600mm before any change of direction (unless otherwise specified by the appliance manufacturer). This is in accordance with the recommendations contained in BS 5440 Part 1 section 4.1.5.

 

CONNECTING FLUE PIPE DIAMETER

The chimney size should be as recommended by the appliance manufacturer. Where there is a requirement for a flue diameter smaller than the appliance spigot, then the operational requirements of the appliance and the configuration of the flue must satisfy the flue sizing requirements of EN13384-1 for single appliances, and EN13384-2 for multi appliances.

 

DISTANCE TO COMBUSTIBLES

In accordance with building regulations, it is essential that the correct distance to combustible material is maintained on connecting flue pipes. On solid fuel applications, where there is a risk of soot fire, on unmeasured (NM) designated single wall product, this distance is 3 x ØInt of the pipe, e.g. for Ø130mm the distance is 390mm and for Ø150mm the distance is 450mm to combustibles on both painted and non painted variants. On measured (M) single wall or double wall products this distance will be as declared by the chimney manufacturer. On ICS25, when used as a connecting flue pipe, this distance has been measured and is set at 100mm.

ENGLAND / WALES

The installation must be carried out by a HETAS, OFTEC, NAPIT or APHC registered installer for England and Wales.

SCOTLAND

All installations need to be carry out by a competent person this could be a HETAS, OFTEC, NAPIT or APHC registered installer or have been approved by the local building control authority.

CONNECTING FLUE PIPE ROUTE

Single wall connecting flue pipes should only be used to connect appliances to a Chimney. They should not pass through any roof space, partition, internal wall or floor, except to pass directly into a chimney through a wall of the chimney.

Connecting flue pipes should be located as to avoid igniting combustible material.
 
On solid fuel appliances the maximum length of a connecting flue pipe is 2m. This distance is reduced to 1.5m if any of the acceptable alternative methods of connection are adopted as per BS EN15287-1. (See p.5-6 for full details.)

On appliances with a top outlet, it is recommended that a vertical run of at least 600mm should be allowed immediately above the appliance prior to any change of direction.

On appliances with a rear outlet, it is recommended that there is maximum of 150mm in the horizontal run however under certain conditions, as described in alternative methods in BS EN 15287-1, this may be increased to 450mm. (See p.5-6 for full details.)

Within a system (Chimney + Connecting Flue Pipe) there should be no more than 4 changes of direction of maximum 45˚. 90˚ Factory made bends or tees within the system may be treated as being equal to two 45˚ bends (as per Document J of the Building Regulations issued October 2010).
 
INSPECTION

On solid fuel applications to conform to Building Regulations, provisions should be made to enable a chimney to be inspected and cleaned.
An inspection pipe, inspection elbow or a 90° or 135° Tee with tee cap can form a suitable inspection point (unless cleaning/inspection can be done through the appliance). To aid cleaning, sufficient distance should be left between changes of direction to permit the safe passage of cleaning brushes within the system. This is particularly important on solid fuel applications. It is recommended that chimneys serving solid fuel appliances be swept as frequently as necessary, but at least twice a year.

ACCEPTABLE ALTERNATIVE METHODS OF CONNECTION
 
Where a horizontal connecting flue of more than 150mm is required to connect a solid fuel fired appliance to a chimney, an installation method as per the examples below may be used provided the following criteria is met:-

1. The maximum length of horizontal connecting flue pipe does not exceed 450mm;
2. A Defra exempt appliance or an appliance, which is limited to burning authorised smokeless fuel only, is installed;
3. A calculation according to BS EN13384-1 has indicated safe operation of the proposed configuration, and the results of the calculation are left with the householder along with the appliance installation instructions;
4. The appliance manufacturer agrees in writing to the proposed configuration;
5. The chimney manufacturer agrees in writing to the proposed configuration;
6. The total length of single wall connecting flue pipe is not more than 1.5m;

DISTANCE TO COMBUSTIBLES

In accordance with building regulations, it is essential that the correct distance to combustible material is maintained. On solid fuel applications, where there is a risk of soot fire, a distance of 60mm to combustibles must be maintained within a combustible floor and within acombustible shaft (see Fig.1 below).There is no need to line the area within the floor cavity with plasterboard; however the ventilated fire stop plate and ventilated support plate must be used.
 
On gas and oil applications, a distance of 50mm to combustibles must be maintained within a combustible floor and within a combustible shaft. The ventilated fire stop plate and ventilated support plate must be used.

Where the chimney penetrates a non combustible floor and where a non combustible shaft is used, a distance of 50mm to the shaft is sufficient. In this case, non ventilated fire stop plates and support plates may be used with a ventilated fire stop being used where the chimney penetrates into the roof space.
 
On bungalow applications where the chimney runs through either a combustible or non- combustible ceiling, an unventilated bungalow fire stop plate kit can be used. Please note that an unventilated support plate can not be used above the ceiling in this case. The weight of the chimney should be supported using the roof support (see p.33). Distance to combustibles must be respected within the ceiling space (see Fig. 2 below) and mesh frame should be used within the loft space, which must be ventilated (see Fig. 2 below).

SUPPORT COMPONENTS

The weight of a chimney system is considerable and requires independent support. Minimal weight should be borne by the appliance. The weight of the chimney can be supported from floor level by using a base support plate, or floor support; from the wall by using wall support top plates together with side plates or cantilever brackets; or from first floor level by using a support plate and clamp fixed to the floor/ceiling joists.

Wall brackets are non load bearing and provide lateral support only. Refer to the load bearing tables.

Where the flue is freestanding above the roof and its height exceeds 1.5m above the last support or above the roof, a height of up to 3m can be achieved unsupported using the extended locking bands at the joint immediately below the last support and on each pipe joint above the last support.

Alternatively guy wire brackets can be used at the 1.5m level and every 1.5m thereafter in conjunction with guy wires, or rigid stays (provided by others).
 
CHIMNEY TERMINATION

For full information regarding to chimney termination, please refer to Annex M of BS EN 15287-1. 

TERMINALS

All terminals must be secured with the use of a locking band. On solid fuel appliances, an open termination is normally recommended. However in certain conditions, rain caps or anti- downdraught terminals may be used.

Rain caps and anti-downdraught terminals are available in three versions, with anti-bird mesh, with spark guard, or without mesh. Where a terminal with mesh is used, there is a risk of soot build up, and therefore regular cleaning is required to avoid blockage, particularly when using oil or solid fuel.

LOCKING BAND (SUPPLIED WITH EACH COMPONENT WITH A FEMALE SOCKET ON THE CASE)

A locking band must be fitted to every joint in the system. The band is of stainless steel construction and is fitted with a quick release clip and a stainless steel tightening bolt.The bolt can be adjusted to ensure the joint is firmly secured.
 
STRUCTURAL LOCKING BAND

The structural locking band, which is purchased separately, is used instead of a standard locking band in a situation where extra structural support is required, for instance where the chimney height is >1.5m above the last support or above the roof. It is also used to provide extra support in long horizontal runs. A maximum of 3m unsupported height can be achieved by fitting the structural locking band on the joint immediately below and on every joint above the last support. Please see diagram on page 39.
 
APPLIANCE CONNECTOR/STARTING CONNECTOR/ STOVE STARTER PIPE

The protruding liner of these components should be pushed into the appliance spigot with the external male case spigot pointing upwards.
On solid fuel appliances the appliance connector should be sealed to the appliance with fire rope and fire cement or high temperature sealant to provide a gas tight joint. On condensing appliances the appropriate lip seal should be used.
 
ADAPTORS FROM PRIMA PLUS & PRIMA SMOOTH TO ICS

These components are used to convert from a single wall connecting flue pipe to the ICS system chimney. The protruding liner should be pushed down inside the female socket of the connecting flue pipe, with the double wall external case spigot pointing in the direction of the flue gases.
 
ADAPTOR TO FLEX/TECNOFLEX PLUS

This component is used to convert from ICS to Flex/TecnoFlex Plus. The Flex/TecnoFlex Plus is pushed down inside the upstand on the adaptor, secured using self tapping screws and sealed with fire cement and fire rope to provide a gas tight joint.
 
ADAPTOR FROM ICS TO PRIMA PLUS

This component is manufactured with an ICS female socket and a Prima Plus female socket, and is used where there is a requirement to convert from ICS to Prima Plus. The ICS female socket should be attached to the previous ICS component and the joint secured using the locking band provided.
 
INCREASER

This component is used to increase from one diameter to the next diameter (e.g.) 200mm to 230mm. The component is fitted in the same way as a standard pipe length and should be secured with the locking band provided.
 
ANCHOR PLATE

When commencing an installation with a fire chest, hood or similar an anchor plate with plain end should be used. When extending an existing brick or masonry chimney stack, an anchor plate must be used which needs to be lined with a TecnoFlex Plus Liner then the anchor plate with the screw fit connection should be used . The liner of the Anchor Plate should be pushed into the opening of the fire chest with the plate resting on a bed of fire cement. The plate should then be fixed onto the concrete slab by masonry screws fitted through the pre-drilled holes in the plate.

In the case of a chimney extension, the liner of the anchor plate fits down inside the existing chimney stack. If a TecnoFlex Plus chimney liner is being used then the anchor plate is secured to the liner by twisting in a clockwise direction. The plate should then be then be bolted to the top of the existing chimney and sealed using fire cement.
 

ELBOWS AND 90˚ INSPECTION ELBOWS

Please note that 90° Inspection bends may be incorporated into a connecting flue pipe arrangement on all fuels, please refer to National Annex of BS EN 15287-1 for specific guidance.

In cases of top mounted stoves, a minimum vertical height of 600mm from the appliance must be respected prior to any change of direction in the flue pipe.

1. Frame a four sided level square opening within the joists using timber stringers where necessary to allow for the correct distance to combustibles from the outer wall of the chimney. This distance must be a minimum of 50mm on Gas and Oil applications and 60mm for solid fuel applications (see Fig. 3 below – distance x).
2. Lower the chimney section through the opening in the floor, and secure to the next section of pipe.
3. Locate the two halves of the support plates around the chimney section, and secure to the joists using screws or bolts.
4. Remove the screws which are fastened to the clamp band. Then fasten clamp band around the chimney section and position on top of the plate. Tighten using the nuts and bolts provided.
5. Using the holes in the clamp support ring drill 3mm holes in the outer casing of the chimney section (drill bit should be set for a depth no greater than 10mm to avoid damage to the liner).
6. Using the screws provided secure the clamp support ring to the outer casing of the chimney section.

Note: Joints must NOT occur within the floor or ceiling joists.

VENTILATED FIRESTOP PLATE (1 & 2-PIECE ROUND AND 2-PIECE RECTANGULAR)

The ventilated fire stop plates are used in combination with standard ICS pipes where the chimney passes through a combustible floor or ceiling. The outermost circle of ventilation slots gives a distance to combustibles of 60mm. This measures the required distance for solid fuel applications. For gas and oil applications a minimum of 50mm is required, which should be measured on site. The fire stop plate should be positioned around the chimney and fastened to the pre-cut plasterboard or to the timber frame with nails or screws using the location holes provided (see Fig. 2 above).

NON-VENTILATED BUNGALOW FIRESTOP (1 & 2-PIECE ROUND AND 1-PIECE RECTANGULAR)

Installed as per a ventilated firestop using the location holes provided (see Fig.4 above). Distance to combustibles must be respected - see p.8 for further info.

SUPPORT PLATE WITH S/S CLAMP BAND (NON COMBUSTIBLE FLOOR)

The support plate is used where the chimney passes through a non combustible floor, and the weight of the chimney has to be taken at floor level. The support plate must be firmly fixed to the floor using bolts or screws provided by others. For load bearing Data refer to table on page 40.

FIRE STOP PLATE (NON COMBUSTIBLE FLOOR)

This fire stop plate is used exclusively where the chimney passes through a non combustible floor. The two halves of the plate are located around the chimney section and fastened to the floor using bolts or screws provided by others.

INSTALLATION

Schiedel airtight kits are tailored to meet the outer diameter of Schiedel’s twin wall insulated ICS50 System Chimney. The kit is pulled around the outer case of the
ICS50 System Chimney and attached to the air tight membrane, using the special tape provided.
 
APPLICATION

The tape is used to attach the EPDM seal to the vapour and/or wind barriers. Schiedel Chimney Systems Ltd does not advise using the tape on rough surfaces, concrete, brick or bitumen-based materials. Surfaces must be clean, dry and grease-free before fitting.
 
SEALING TAPE

The special tape used with the airtight kit is made from elastic PE film and acryl adhesive. This combination means the tape is longlasting and quick to fit (it sticks immediately). To make it as easy to use as possible, the tape comes with a paper liner which is removed prior to use.
N.B. Do not use tape on steel pipe, only to seal the joint between the EPDM seal and the vapour/wind barriers

Please note: It is the responsibility of the installer to ensure that the truss to which the roof support is being attached is load bearing and capable of withstanding the weight of the system being installed.
 

GUY WIRE BRACKET

This component should be used to secure unsupported chimney sections above
roof level. Guy wires or preferably rigid stays (supplied by others) must be fixed to the bracket and secured to suitable anchorage points to ensure that the chimney sections are stable.

A maximum chimney height of 1.5 metres from the last support, or from the roof is permitted. Additional height requirements MUST be supported at 1.5 metre intervals using the guy wire bracket as specified above, or by using telescopic roof stays

OUTLET SITING

Flue terminations for solid fuel & oil are subject to EN15287-1 2007. Figures A and B illustrate recommendations for the most commonly encountered outlet terminations. Flue terminations for gas in domestic situations are governed by the BS5440-1 2008 Section 4.2. Figure C illustrates recommendations for the most common siting situations encountered. Adjacent taller structures may require increased height. The minimum flue projection through the roof is 600mm to the underside of the terminal.

FLUE ROUTING

The chimney should remain as straight as possible through its vertical run to assist flow. Should it be necessary to offset a chimney run the following guidelines should be adhered to:
 

• It is recommended that a vertical rise of 600mm should be allowed immediately above the appliance before any change of direction.
• Within a system, on all fuels, there should be no more than 4 changes of direction of maximum 45°.
• 90° Factory made bends or tees within the system may be treated as being equal to two 45° bends (see Document J of the Building Regulations issued October 1st 2010).

TERMINAL TYPES

On solid fuel appliances, an open termination is normally recommended. However in certain conditions, rain caps or anti-downdraught terminals may be used.
Rain caps and anti-downdraught terminals are available in two versions, with mesh/spark guard and without mesh. Where a terminal with mesh is used, there is a risk of soot build up, and therefore regular cleaning is required to avoid blockage, particularly when using oil or solid fuel.

PROVISION FOR SWEEPING, CLEANING AND MAINTENANCE

Provision should be made for inspecting and cleaning the chimney. To aid cleaning, sufficient distance should be left between changes of direction to permit the safe passage of cleaning brushes within the system. This is particularly important on solid fuel applications. It is recommended that chimneys serving solid fuel appliances be swept as frequently as necessary but at least twice a year. Choose an access component suitable for your installation unless cleaning/inspection can be done through the appliance.

ROOM VENTILATION

The room carrying the appliance should have an air vent either direct to an external air source or vented into a room that has an external vent direct to an air source. This is required to provide adequate air supply to allow the appliance and flue to operate efficiently. These requirements are specified in the Building Regulations (Document J) also by CIBSE and BS5440.

COMMERCIAL INSTALLATIONS

Schiedel can provide a full design & flue sizing advice service for commercial installations, using both ICID Plus and our ICS product ranges.

PROVISION FOR CONDENSATE DISPOSAL
(subject to appliance manufacturer recommendations)

Normally solid fuel and atmospheric gas and oil appliances will not need a drain unless rain ingress is significant. Most condensing appliances however need provision for drainage. As a rule of thumb a condensing boiler produces 1 to 1.5 litres of condensate per hour per 10kW of input.

This is a significant amount of acidic liquid which must be drained from the system. Choose appropriate flue drainage components, normally fitted at the base of the stack and close to the appliance outlet.

On high efficiency or on condensing systems, a 3° slope on horizontal runs is advised, using the appropriate 87° bend and 93° tee.

TESTING AND COMMISSIONING PRIOR TO FIRST USE

This is carried out using a flue flow test as described in BS EN 15287 Parts 1 & 2, with reference to the appropriate appliance type.

APPLIANCE OPERATION

If the appliance is slumbered overnight or for longer periods then it is advisable to run the appliance at controlled high fire condition for a period of at least 30 minutes. Prolonged slumbering of the appliance is a contributing factor to a system chimney failure. It is important to maintain sufficiently high flue gas temperatures in order to avoid condensate and acid corrosion problems, and to ensure complete combustion of the fuel.

MULTI-FUEL APPLICATIONS

Multi-Fuel refers to an appliance which may be used to burn either seasoned wood, or approved solid fuels. These fuels should not be mixed, as this increases the risk of deposits being built up in the liner.

MAINTENANCE

Each chimney must be designed to allow for easy inspection; sweeping should be carried out by competent persons. On solid fuel applications a list of HETAS registered sweeps can be found at www.hetas.co.uk. Chimney flue cleaning and inspection require the use of appropriate tooling – under no circumstances should chemical cleaners or mild steel tools be used to sweep stainless steel chimneys. Mechanical sweeping methods such as Rodtech, Rodstation and Gardus, which have been tested and approved by Schiedel Chimney Systems may be used.

Cleaning/inspection of any chimney system should be carried out at least once a year, along with maintenance of the appliance, but it is recommended that chimneys serving solid fuel appliances be swept at least twice a year, at the end of the heating season to remove any deposits, which may have built up during the season, and prior to the start of the next heating season to ensure that the flue way is clear of any blockages such as birds nests etc.

We would advise that monthly checks are carried out to ensure that there is no build up of any deposits in the flue way of the connecting flue pipe or system chimney.

FUEL STORAGE AND USAGE

Where solid fuels are being used, correct storage is critical and fuels must be kept dry. Wood must be seasoned prior to use, with a maximum moisture content of 20%. Only approved fuels should be used. Refer to HETAS list for details on www.hetas.co.uk.The fuel used must be suitable for the appliance - please refer to manufacturer’s instructions.

NOTICE PLATE FOR ICS PRODUCT

The Notice plate should be marked up in indelible ink and securely fixed in an unobtrusive but obvious position within the building such as:

• Next to the electricity consumer unit.

• Next to the chimney installation described.

• Next to the water supply stop-cock.

Under normal operating conditions and providing the system is installed correctly, it should last the lifetime of the appliance, which normally is 10 years. ICS carries a 10 year conditional guarantee. The conditions are that the system is:
 

• Correctly sized and installed in accordance with the manufacturer’s instructions, current Building Regulations and relevant British and European standards.
• Maintained correctly by a qualified and competent person and maintenance records kept updated for both appliance and system chimney.
• Used in combination with an appliance burning only approved fuels in accordance with Schiedel Chimney Systems and the appliance manufacturer’s instructions.
• The product registration form must have been filled in by an appropriately qualified installer (see p.3 for details), and returned to Schiedel Chimney Systems Ltd.

For recommended fuels listings, please refer to the HETAS Guide www.hetas.co.uk
In the event of a fault developing in the product due to defective materials or faulty manufacture Schiedel Chimney Systems undertake to replace the product only.
Schiedel Chimney Systems cannot accept liability nor take any responsibility for the installation, building or redecorating costs or any other consequential losses arising.
If any complaint is found to be a result of faulty installation, non-compliance with or abuse contrary to these conditions, the cost of site investigation is chargeable.