19
8.0
INSTALLATION
Publication No. 5106451
Check Site Requirements (section 7.0) before
commencing.
8.1
Initial Preparation
The gas supply, gas type and pressure must be
checked for suitability before connection (see
Section 7.4).
NOTE:
If the boiler wall plate is to be pre-hung,
follow both these instructions and those on the
boiler pack.
1. Remove the fixing template (Fig. 20) from the
carton.
2. After considering the site requirements
(see Section 7.0) position the template on the wall
ensuring it is level both horizontally and vertically.
3. Mark the position of the centre hole for the wall
plate (Fig. 20).
4. Mark the centre of the flue hole (rear exit).
For side exit:
project the horizontal side flue center
line into the corner of the room and along the wall to
where the flue hole will be drilled (Fig. 20).
The diagram (Fig. 21) shows the dimensions
required to ensure any horizontal flue is installed
with the correct fall to the boiler. Mark the offset (V)
dimension and if required, mark the position of the
gas and water pipes. Remove the template.
5. Cut the hole for the flue (minimum diameter
125mm, see table for wall thicknesses and flue
diameters).
6. Drill and plug the wall as previously marked.
Secure the wall plate using the centre hole.
7. Ensuring the wall plate is level both horizontally
and vertically, drill and plug at least 4 securing
positions at the top and bottom through the wall
plate. Utilising the slots available ensure the wall
plate is square and secure to the wall (Fig. 22).
8. Loosely route the condensate discharge pipe to
the lower left hand side of the wall plate.
Fig. 22
Wall Plate
Centralising
Screw
Wall Thickness
up to 227mm
up to 750mm
up to 1200mm
Flue Hole ø
125mm core drill
150mm core drill
175mm core drill
Fig. 20
Fig. 21
Horizontal
Side Flue
Centre Line
EXAMPLE: Boiler is 2 metres
away from corner of wall, flue
duct hole is 60mm up from
horizontal side flue centre line.
This will maintain the approx 3°
backfall to the boiler.
Wall Plate Template
Edge of Boiler
0.5
1.0
2.0
3.0
4.0
Distance in metres from boiler to the wall.
For pipe lengths greater than 4m increase the off-set by 52mm
for every additional metre to maintain approx 3
°
inclination.
V
Flue Duct Hole
Offset V (mm)
27
55
110
165
220
(metres)
(mm)
3
°
Backfall to the Boiler, ie. 2m flue offset (V) position 110mm
Example
2m
Example
V = 110mm
125mm
Centre
Hole
