Installation

Mandatory Requirements

Connection to an appliance which is not connected to the fuel supply, should be carried out by a competent person. However, connection to an appliance that is connected to the fuel supply must be carried out by a CORGI (gas), OFTEC (oil) or a HETAS registered installer.Prior to installation.

Prior to Installation

In all cases the chimney should be inspected for deterioration and if necessary any remedial work required should 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. It will be necessary to check that the flaunching at the top of the stack is not cracked, and if so replaced. The brickwork pointing and the flashings should be checked to ensure they are in good order and corrected as necessary.

Installation of the liner

The flue liner should be pulled down the chimney using a nose cone and string/rope. All Wonderflex & Triplelock packs are supplied with a nose cone. In the case of Turboflex Plus, a nose cone can be purchased and connected to the end of the Turboflex Plus by using self tapping screws.

lt is strongly recommended that a 1m test section, with nose cone attached, is pulled through the chimney prior to installation in order to ensure the chimney is suitably sized, and free from obstructions. These can be purchased separately from your local distributor.

When securing the liner to the clamp plate or clamp band,ensure 75mm of liner is protruding to secure the terminal.

Liner Orientation

It is essential in the case of twin Wall Turboflex Plus that the liner is installed the right way up. The arrow on the outside of the liner indicates the direction of flue gas flow and must be pointing upwards towards termination. Gas flex can be installed either way up.

Bending of the liner

Great care should be taken to avoid overbending or kinking the liner on installation. The minimum bending radius are shown in the table below.

Insulation.

If insulation is required, normally granules such as Vermiculite, should be poured in at this stage after fitting a suitable debris plate at the bottom of the system. Alternatively a solid tube of high quality insulation can be used.

Support of the liner.

Wonderflex & Triplelock is relatively light and can be supported at the top of the chimney using a clamp plate fixed to the top of the masonry stack. Turboflex Plus however, is heavier and must be supported using a separate plate and clamp securely fixed to the top of the stack. 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 is required, fixed to the inside of the stack. In all cases, liner lengths exceeding 15 metres should be provided with intermediate support, by using additional clamp plates/support brackets.

Cutting the liner to the correct length for the chimney.

After the length of flue liner has been connected to the appliance,allow at least 75mm of liner to protrude above the clamp plate and cut. For Wonderflex & Triplelock, an industrial knife can be used. For Turboflex Plus use metal snips. The cut ends must be secured using either electric tack welding or stainless steel rivets to avoid the liner risking unravelling. 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.

Sealing the flue liner to the chimney pot.

The clamp plate or plate and clamp holding the liner to the chimney top should be fixed using screws and wall plugs. To weather the top of the chimney stack and seal any gaps between the liner installation and the chimney pot appropriate acid resistant mortar should be used.

Connection of the Terminal to the flue liner.

For gas and oil systems, the terminal should be fitted over the protruding 75mm of liner and rivetted or secured using self tapping screws. On Turboflex Plus, where used on solid fuel appliances, a proprietary chimney pot must be fitted by bedding the pot on to the top plate.

Joining of flexible flue liner.

Flexible flue liners must be installed in continuous lengths without joiners. Schiedel Rite-Vent can supply all flue liners in specific lengths on drums or in pack form upon request. On Turboflex Plus installations, joiners are only permitted where the chimney liner length exceeds the maximum drum length available and details of the installation are agreed in advance, in writing, in compliance with product warranty conditions.

Connection to the appliance or flue box.

The connection to the appliance should be made using fire cement/rope or high temperature sealant to ensure a positive seal. Generally an appliance connector is not required. Where
Turboflex Plus is to be fitted to the top of an open fire place, a Schiedel Rite-Vent gather unit should be fitted into the throat of the chimney connected to the Turboflex Plus and sealed off.

When connecting to a Schiedel Rite-Vent flue box, the flexible liner simply pushes directly on to the fast fix spigot. No sealant is required.

When making a connection to a fluepipe in another product type, then the appropriate connector to/from flexible should be used. When making a connection to a fluepipe which is to be joined to the appliance spigot, then the appropriate BVent (gas), KVent (kerosene), ICS (multifuel) or Prima Plus 1mm (multifuel) appliance connector must be used, suitably sealed to the appliance spigot ensuring a gas tight joint.