Technical information

Combi 70 & Combi 90 Oil Boilers

Note: The overall assembled flue length should not

exceed 4.0 metres from the top of the boiler to the end

of the terminal.

Accessories available:

Extension 225 mm

Extension 450 mm

Extension 950 mm

Adjustable extension 275 - 450 mm

145° bend

Wall bracket

Note: Flue sections cannot be cut.

4 - BOILER INSTALLATION

Fitting instructions for the high level balanced flue and

vertical balanced flue are supplied with the flue kits.

Adjustable sections: The adjustable extensions are

telescopic. The wall terminal section is adjustable and

is suitable for a wall thickness of 215 mm to 450 mm.

Simply adjust to the required length using a twisting

motion. The outer pipes must overlap by a minimum

of 25 mm.

Extensions: The vertical height and horizontal length

of the flue may also be increased using extensions. The

extensions are available in fixed lengths of 225 mm,

450 mm and 950 mm. An adjustable extension (275 -

450 mm) is also available.

Bends: 45° bends are available and may be used to

create an offset or deviation in the flue system. The

distance between the bends should be kept as short as

possible with a maximum length of 950 mm.

The equivalent flue length of each elbow is approximately

one metre. Only two bends should be used.

Fig. 15 - High level balanced flue

High level and vertical balanced flue

4.3