Westen Star Condens+, Instruction Manual For Users And Fitters

Page: 9 / 76

9
INST
ALLER Section
(en)
7729500 (03-12/19)
The template outline is shown in annex "SECTION" C at the end of this manual.
After deciding the exact location of the boiler, fix the template to the wall. Connect the system to the gas and water inlets present
on the lower bar of the template. Make sure the rear part of the boiler (back) is as parallel as possible to the wall (otherwise,
shim the lower part). Fit two G3/4 taps (flow and return) on the central heating circuit; these taps make it possible to carry out
important operations on the system without draining it completely. If you are either installing the boiler on an existing system or
replacing one, as well as the above, fit a settling tank under the boiler on the system return line in order to collect any deposits
and scale circulating in the system after flushing. After fixing the boiler to the template, connect the flue and air ducts, supplied
as accessories, as described in the following sections. Connect the siphon to a drain trap, making sure the slope is continuous.
Avoid horizontal stretches.
Do not lift the boiler exerting pressure on the plastic parts like the siphon and the flue turret.
Tighten the boiler water connections with care (maximum tightening torque 30 Nm).
Before starting up the boiler, fill the water siphon to prevent the fumes from diffusing in the room.
9.1 BOILER DIMENSIONS AND GAS WATER CONNECTIONS
A Condensate drain point D GAS inlet
B Heating flow E Cold domestic water inlet / System filling tap
C
D.H.W. outlet (G1/2”)
F
Heating return
The dimensions of the boiler and the relative installation positions of the water connections are shown in the annex "SECTION"
C at the end of the manual.
10. INSTALLING THE DUCTS
The boiler is easy and flexible to install thanks to the extensive range of available accessories, as described below. The boiler
has been designed for connection to a vertical or horizontal coaxial flue-air duct. The boiler can also be used with separate ducts
using the accessory splitting kit.
WARNINGS
C13, C33 The terminals for separate flues must be fitted inside a 50 cm square. Detailed
instructions are provided with the individual accessories.
C53 Do not fit the flue and air duct terminals on opposite walls of the building.
C63 The pressure drop of the ducts must not exceed 100 Pa . The ducts must be certified for
this specific use and for a temperature in excess of 100°C. The flue terminal must be certified
to EN 1856-1.
C43, C83 The flue terminal or flue duct must be suitable for the purpose.
For optimal installation, the accessories supplied by the manufacturer should be used.
To optimise operating safety, make sure the flue ducts are firmly fixed to the wall with
suitable brackets. The brackets must be positioned over the joints at a distance of
approximately 1 metre from one another.
10.1 CONCENTRIC DUCTS
This type of duct is used to discharge exhaust fumes and draw
combustion air both outside the building and if a LAS flue is
fitted. The 90° coaxial bend allows the boiler to be connected
to a flue-air duct in any direction as it can be rotated by 360° It
can also be used as a supplementary curve combined with a
coaxial duct or a 45° curve.
If fumes are discharged outside the building, the flue-air
duct must protrude at least 18 mm from the wall to allow an
aluminium weathering surround to be fitted and sealed to
avoid water infiltrations.
• A 90° bend reduces the total duct length by 1 metre.
• A 45° bend reduces the total duct length by 0.5 metres.
• The first 90° bend is not included when calculating the maximum available length.
Make sure there is a minimum downward slope of 5 cm per metre of duct towards the boiler.
SOME OUTLET DUCT INSTALLATION EXAMPLES AND THEIR RELATIVE MAXIMUM LENGTHS ARE SHOWN IN ANNEX
"SECTION" D AT THE END OF THIS MANUAL.