Instructions Prior To Installation; Installing The Boiler; Boiler Pump - Baxi LUNA DUO-TEC MP 1.90 Manual De Uso

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:
• 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 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 fitter.
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

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 pri-
mary 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 "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. 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. Fit a hydraulic separator, sized according to ma-
ximum 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.

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 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
7104645.02 (1-01/12)
Operating flow rate (l/h) with
BAXI hydraulic separator
4200
4600
26