8
INSTALLATION
Recommendations:
• If the burner shuts down, wait for a few minutes before trying to
ignite it.
• Shut off the main switch before carrying out any work on the boiler.
•Quality of the heating circuit water - The quality of the water is a
key factor for the lifetime of the boiler:
- total hardness < 15°F
- pH of 6 to 8
- free oxygen < 0.5ppm
- free of sludge:
(clean the system before connecting the new boiler).
Poor quality water can cause lime scale deposits and corrosion of
the inside surface of the heating body
Consult a specialist water treatment company if the heating water
does not comply with the characteristics given above.
•Avoid locating boilers in poorly ventilated basement areas. The
high- and low-level ventilations must comply with current regulations.
•Provide a self-regulating draught valve on the chimney.
Thermostat settings:
• Set the slow firing rate thermostat (2) to the desired operating t°.
• Set the high firing rate thermostat (3) to a t° of 10°C lower than
the slow firing speed thermostat.
PREPARING THE BOILER AND
MOUNTING THE CASING
Please refer to the assembly instructions supplied with the casing.
MOUNTING THE BURNER
Only a qualified technician may mount the burner, in compliance
with current standards in force.
When installing the burner, we recommend you:
• secure the burner plate using all the nuts provided to guarantee
the seal;
• guarantee a minimum burner penetration in the combustion
chamber, according to the indications in the table below;
•check that the burner gas tube is sized according to the gas supply pressure;
• check that the burner can exceed the boiler combustion chamber
pressure;
•insert the fiberglass cord supplied into the empty space between
the boiler combustion head and the chamber plate insulating
panel (if the quality is not sufficient — this depends on the Ø of
the burner head — use more cord to fill the space up to the inside
surface of the chamber plate insulation) to prevent the plate from
overheating from the effect of the flue gases, which could defor m
the chamber plate;
• adjust the flame to optimize the use of the combustion chamber
without touching the bottom or the panels.
Please see the previous page for the electrical wiring diagram for the
control panel
COMMISSIONING
Filling the system:
• Make sure that all the system valves are open except the
drain cock. Place the 3- or 4-channel mixing valve to the middle
position.
•Drain the system and monitor the pressure;
- hydrostatic height … with the expansion vessel open.
- hydrostatic height + 0.5 bar in closed systems.
Commissioning the burner:
•Check the burner charge relative to the boiler’s output.
• Check that all the safety parts are correctly calibrated and connected: safety valve, expansion vessel and thermostats.
• Check that the pumps are functioning normally.
• Open the system’s valves.
• Commissioning the burner:
Checks:
•First check the burner charge, then adjust the settings and check
the combustion characteristics — flue gas T° - CO
2 - CO and
blackening index.
•check that the settings and high-limit thermostats are operating
correctly; check the low-limit thermostat and the chamber plate
opening switch.
• Check that the safety valve is oper ating correctly (max pressure =
5 bar) by activating it manually.
• Check that the ventilation in the boiler room is adequate and
check that the chimney is conform.
• Check that the return temperature is not less than 40°C, that the
recirculation loop is connected and that it is operating correctly.
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