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Baxi Luna Duo-Tec MP+ 1.110 Manual De Uso Destinado Al Usuario Y Al Instalador página 32

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INSTRUCTIONS PRIOR TO INSTALLATION
The following notes and instructions are addressed to installers to allow them to carry out trouble-free installation. Instructions for
igniting and using the boiler are contained in the 'Instructions for Users' section. The installation must satisfy the requirements of
standards and local by-laws and technical regulations.
Moreover, the installation technician must be qualified to install heating appliances. Additionally, bear in mind the following:
• When installing the unit in environments with temperatures lower than 0°C, take the necessary precautions to avoid the
formation of ice in the siphon and in the condensation drain.
• The boiler can be used with any kind of convector plate, radiator or thermoconvector. Design the system sections as usual,
though, bearing in mind the available capacity-head at the plate (see annex "SECTION" E at the end of this manual).
• Initial ignition of the boiler must be carried out by the Authorised Service Centre (as indicated on the attached sheet).
Failure to observe the above will render the warranty null and void.
When supplied, the boiler is not fitted with the following components: EXPANSION VESSEL - SYSTEM FILLING TAP -
HYDRAULIC SEPARATOR. These must be mounted by the installer.
Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as they are a potential source of danger.
9. INSTALLING THE BOILER
After fixing the boiler on the wall, replace the cap at the bottom of the
siphon with the one in the pack, reusing the ring nut and referring to
the figure. Fill the siphon and check it for any leaks.
Take special care when filling the heating system. In particular, open
any thermostat valves in the system, ensure the water enters slowly
in order to prevent the formation of air inside the primary circuit until
operating pressure is reached. Lastly, vent any radiators in the system. BAXI
declines all liability for damage deriving from the presence of air bubbles in
the primary exchanger due to the incorrect or imprecise observance of the
above.
Tighten the boiler water connections with care (maximum tightening
torque 30 Nm).
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 G1-1/2" 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.
On the Italian market, the system must comply with Raccolta R safety
provisions (limit thermostat, safety pressure switch, fuel cut-off valve, etc..).
Fit a hydraulic separator, sized according to maximum boiler and system
pressure, downline from the hydraulic connectors of the boiler. 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. The boiler is electronically fitted out for
connection to an external storage boiler.
Do not lift the boiler exerting pressure on the plastic parts like the siphon and the flue turret.
9.1 BOILER PUMP
The boiler pump (13 - "SECTION" A) is modulating and circulates the water between the boiler and the hydraulic separator (for
hydraulic performance see the charts in annex "SECTION" E). The water in the system is circulated by the relative pumps (see
section 11.2.3).
Check that the flow of the water circulating in the boiler is not less than the value indicated in the following table:
Model
Minimum flow rate (l/h)
1.90
2000
1.110
2250
7221409.03 (2-07/16)
Operating flow rate (l/h) with
BAXI hydraulic separator
4200
4600
32
3
2
7221178.01
1

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