Installation of TecnoFlex using Clamp & Plate

FLEX INSTALLATION USING CLAMP AND PLATE

No, in all cases, the chimney must be inspected for deterioration and if necessary, any remedial work required must be carried out.The chimney should be swept, preferably by a member of NACS (National Association of Chimney Sweeps) or a suitably qualified chimney sweep who would provide a certificate after sweeping and checking, which should be retained for future reference. A list of HETAS registered chimney sweeps can be found at www.hetas.co.uk

Flex may only be used to line an existing chimney stack. Connection between the appliance and the flexible liner should be carried out using a connecting flue pipe tested and approved to EN1856-2.

TecnoFlex Plus should be supported either by using a separate plate and clamp, which would be securely fixed to the top of the stack, or using a suitable pot hanger. Where a tee is used at the base of the system to provide a drain point/cleaning access or connection to a flue pipe from the appliance, a bottom support bracket should be used, fixed to the inside of the stack.

After the length of flue liner has been connected to the appliance, fluebox spigot or to the flue pipe connecting to the appliance, allow sufficient liner to protrude at the top of the chimney stack in the case of the pot hanger terminals, or above the top plate and clamp to ensure a positive location within the relevant terminal, and cut.This should be done by using an industrial knife or metal snips. At all times extreme care must be taken when cutting the liner and strong industrial gloves plus long sleeved overalls should be worn as cut edges are very sharp. In addition, any tape secured to the ends of the liner, which is provided for safe handling prior to installation, must be removed before completion, and commissioning of the full system.

Yes,on TecnoFlex Plus multifuel liner, the directional arrow on the outside of the liner indicates the direction of flue gases, and this must be pointing upwards towards termination

On TecnoFlex Plus,where used on solid fuel appliances,either a proprietary chimney pot must be fitted by bedding the pot on to the top plate or, whilst technically an open terminal provides the least possible resistance to the flue gases, in order to prevent excessive rain ingress, a raincap or combined pot hanger and terminal may be used. Only 316L material should be used on raincaps to provide higher corrosion resistance. In all cases, the top of the stack should then be weathered and sealed using a suitable acid resistant mortar to prevent ingress of water.

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

The flue liner can be pulled up or down the chimney the chimney using a nose cone and string/rope. A screw fit nose cone can be purchased, rope attached, and connected to the end of the liner.

We recommend the use of TecnoFlex Plus on condensing Gas and Oil appliances. The smooth inner liner allows for the swift drain down of condensates to a suitable drain point at the base of the vertical system. TecnoFlex Plus can be used on appliances with a maximum pressure of 200Pa. The liner should be used in combination with connecting flue pipe and fittings, which have been tested and approved to BS EN1856-2. An acid resistant sealant, such as Rotempo or equivalent should be used to seal the joint between the flexible liner and the screw fit adaptor.

It is recommended that flexible flue liners be installed in continuous lengths without joiners. Schiedel Chimney Systems can supply all flue liners in specific lengths on drums or in pack form upon request. On TecnoFlex Plus installations, joiners are only permitted where the chimney liner length exceeds the maximum length available and details of the installation are agreed in advance, in writing, in compliance with product warranty conditions.

Where the chimney is highly exposed or in a large void, then insulation should be considered. If required then granules such as vermiculite should be poured in around the liner having fitted a suitable closure plate at the bottom of the stack. Alternatively a solid tube of high quality insulation may be used. Under all circumstances, the chimney must be fully weather proofed prior to the installation of the liner and any insulation material. Failure to do so will render the warranty null and void.

DISCLAIMER

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.

This installation assistant is to be used as a visual aid only, by qualified installers, in conjunction with the detailed component instructions. For full design and installation details the key referral documents are:

BS EN 1856-2: Connecting Flue Pipes
BS EN 1856-2: Flue Liners
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
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),Section3:Environment (Scotland)
Appliance Installation Instructions and related standards. Other standards covering specific applications will also be relevant and must be adhered to.

Ensure all chimney components are available and check them to ensure there has been no damage. Do not use damaged components.