Supplied By www.heating spares.co Tel. 0161 620 6677
British Gas RD1
-
Installation & Servicing
17
INSTALLATION
FLUE OUTLET
18 CUTTING THE FLUE
-
wall thicknesses of 114 to 600mm
Note.
If the stand-off brackets are used it is essential that
30mm is added to the measured wall thickness when marking
the flue (to allow for the thickness of the brackets).
1.
Measure and note the wall thickness X.
2.
Mark the wall thickness onto the flue.
3.
To ensure the tube is cut square, mark the flue all the way
round.
4.
Cut to length X, using the cardboard ring for support.
5.
Remove cardboard ring and remove any burrs.
17 PREPARING THE WALL
IMPORTANT.
Ensure that, during the cutting operation, masonry falling
outside of the building does not cause damage or personal
injury.
1.
Cut the flue hole, preferably with a 125mm (5") core boring
tool, ensuring that the hole is square to the wall. If the hole
has been accurately cut with a drill then making good the
wall faces is not essential as seals are provided at both
ends of the flue. However, both wall faces immediately
around the cut hole should be flat; make good if necessary.
For less accurate holes make good to approximately
125mm (5") diameter at the 2 wall faces.
2.
Drill 4 holes with an 8mm (
5/16
") masonry drill and insert
the plastic plugs provided, for the wall mounting plate.
Side flue only
3.
Drill 4 holes with a 7mm (
9/32
") masonry drill and insert the
plastic plugs provided, for the side mounting plate.
Note.
If the terminal is to be sited within 25-40mm of a
corner or vertical pipe (refer to Table 3) then the hole
MUST be accurately cut and the rubber weather seal
trimmed around the groove provided. The terminal wall
plate need not be fitted.
For flue lengths greater than 600mm, refer to Frames 26 & 27 - Flue extension ducts.
