Glow-worm 18sxi, Installation And Servicing Manual, Page: 28 / 64

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10 Vertical - Flue Length, Preparation and Installation
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Diagram 10.19
Flue Installation
Refer to diagram 10.20 and secure the flue adapter in
position on top of the boiler with four screws supplied,
making sure the nib fits into the locating slot in the boiler
casing to ensure correct orientation.
NOTE:
The rubber ‘O’ rings of each section should be
lubricated prior to assembly. Do not use mineral oils or
grease, silicon grease or water is recommended.
Secure the first extension pipe to the flue adapter with the
securing collar supplied by positioning the collar centrally
over the joint, then tighten the two screws on the securing
collar, see diagram 10.21.
Fit more extension pipes as required using the collar and
screws supplied with each extension pipe. To fit position
the collar centrally over the joint, tighten the two screws on
the securing collar. Using the holes provided in the securing
collar drill and insert the two self tapping srews supplied, see
diagram 10.22.
When installing the flue it is recommended that it is
supported every 2 metres and at every bend by a fixing
bracket.
Project the rise of the flue pipe to roof level and cut a 150mm
hole in the roof.
Flue Terminal Installation
(a) Pitched Roof
Fit the required pitched roof weather collar over the 150mm
hole in the roof. Make good the tiling or slating around
the collar incorporating the flashing of the weather collar.
Position the angle cap over the weather collar in the correct
orientation to attain the correct angle for your roof.
(b) Flat Roof
Fit the aluminium weather collar over the 150mm hole in the
roof ensuring a weather tight seal.
From above carefully place the flue terminal through the
weather collar.
Flue Terminal to Boiler Connection
Should the clearances above the boiler to roof not allow for
extensions, it is permitted to cut the flue terminal ensuring
the relationship of flue and air duct lengths are retained.