12
2000225013B
Diagram 6.1
9169
WALL
TEMPLATE
EXTENDED SIDE FLUE
Ø 125
90
0
6 Installation Preparation
5 Domestic Hot Water System
176
5.1 General
The domestic water hot service must be in accordance with the
current issue of BS5546, refer also to the current issue of
BS6700.
5.2 Domestic Hot Water Cylinder
SINGLE FEED INDIRECT CYLINDERS ARE NOT SUITABLE
AND SHOULD NOT BE USED.
The domestic hot water cylinder must be of the double feed
indirect coil type. It must be suitable for working at a gauge
pressure of 0.35bar above the safety valve setting.
6.1 Unpacking of Boiler
IMPORTANT: With regards to the Manual Handling Operations,
1992 Regulations, the following lift operation exceeds the
recommended weight for a one man lift.
Stand the boiler carton upright.
Cut and remove the securing straps and lift off the carton
sleeve. Place aside any loose components until required.
Carefully lay the boiler on its back, remove the two front casing
panel securing screws and lift off the panel from two retaining
lugs, see diagram 6.3.
Remove the two inner casing panel securing screws at the
bottom front of the panel, then lift off the two retaining lugs, see
diagram 6.3.
6.2 Wall Template
Remove the wall template from the wall mounting pack and
place in the desired position on a flat wall, giving due consideration
to boiler clearances, see section 2.2.
6.3 Flue Hole Cutting
The
standard horizontal flue
is designed with an internal fall
of 35mm/metre towards the boiler for disposal of condensate.
If the standard flue length alone is being used then the flue hole
of diameter 105mm can be cut in the position marked on the wall
template.
For
standard side flues
the horizontal flue centre line on the
wall template should be extended to the side wall, and the
vertical centre of the flue hole marked at 181mm from the back
wall.
For installations with external access, a 105mm diameter core
drill can be used.
For installations with internal access only, a 125mm diameter
core should be used.
When using extension pipes with the horizontal rear flue, a core
drill size of 125mm should be used to allow the extension pieces
to slope at 35mm/metre (2.5
o
) towards the boiler.
For
extended side flues
, the flue hole centre should be
determined by extending the dashed inclined line on the template
to the side wall. This dashed line is drawn at 35mm/metre (2.5
o
)
rise from the boiler. Where this line reaches the side wall, a
horizontal line should be marked. The vertical centre line of the
flue should then be marked at 181mm from the back wall, see
deagram 6.1.
To allow for the flue passing through the wall at this angle a
125mm hole should be drilled irrespective of internal or external
installation.
If necessary remove the wall template whilst drilling the flue
hole.
