Instructions For Fitters; General Information; Instructions Prior To Installation - Baxi LUNA3 COMFORT HT Gebrauchsanleitung Für Den Benutzer Und Installateur

The following notes and instructions are addressed to fitters to allow them to carry out trouble-free installation. Instructions
for lighting and using the boiler are contained in the 'Instructions for Users' section.
Please note the following:
• This boiler can be connected to any type of double- or single-pipe convector plate, radiator or thermoconvector. Design
the system sections as usual, though, bearing in mind the available flow-head at the plate, as shown in section 26.
• Do not leave any packaging (plastic bags, polystyrene, etc.) within reach of children, as it is a potential source of
danger.
• Initial lighting of the boiler must be carried out by an authorised Service Engineer, as indicated on the attached
sheet.
Failure to observe the above will render the guarantee null and void.

12. INSTRUCTIONS PRIOR TO INSTALLATION

This boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure. It must be
connected to a central heating system that is compatible with its performance and power levels.
Before having the boiler installed by a qualified fitter, check the following:
a) Make sure that the boiler is adjusted to use the type of gas delivered by the gas supply. To do this, check the markings
on the packaging and the rating plate on the appliance.
b) Make sure that the flue terminal draft is appropriate, that the terminal is not obstructed and that no exhaust gases
from other appliances are expelled through the same flue duct, unless the latter has been specially designed to collect
exhaust gas from more than one appliance, in compliance with current laws and regulations.
c) Make sure that, if the boiler is connected to existing flue ducts, these have been thoroughly cleaned as residual products
of combustion may detach from the walls during operation and obstruct the flow of fumes.
To ensure correct operation and maintain the warranty, observe the following precautions:
1. DHW circuit:
1.1. If the water is harder than 20 °F (1 °F = 10 mg calcium carbonate per litre of water), install a polyphosphate dispenser
or an equivalent treatment system, compliant with current regulations.
1.2. thoroughly flush the system after installation of the appliance and before use.
1.3. The materials used for the domestic hot water circuit of the product comply with Directive 98/83/EC.
2. Heating circuit
2.1. new system
Before installing the boiler, thoroughly clean the system in order to eliminate residual thread-cutting swarf, solder and
any solvents, using suitable proprietary products. To avoid damaging metal, plastic and rubber parts, use only neutral
cleaners, i.e. non-acid and non-alkaline. Recommended cleaning products: SENTINEL X300 or X400 and FERNOX
Regenerator for heating circuits. Use these products in strict compliance with the manufacturers' instructions.
2.2. existing plant:
Before installing the boiler, drain the system and clean it to remove sludge and contaminants, using suitable proprietary
products as described in section 2.1.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such
as SENTINEL X100 and FERNOX Protector for heating circuits. Use these products in strict compliance with the
manufacturers' instructions.
Remember that the presence of foreign bodies in the heating system can adversely affect boiler operation (e.g.
overheating and excessive noise of the heat exchanger).
Failure to observe the above will render the guarantee null and void.
IMPORTANT:
when connecting an instantaneous boiler (mixed) to a system with solar panels, the maximum tem-
perature of the DHW at the boiler inlet must not be greater than:
• 60°C with a flow limiting device
• 80°C without a flow limiting device

INSTRUCTIONS FOR FITTERS

11. GENERAL INFORMATION

58
926.420.3 - EN