47
Instructions for the installer
3.17 Filling the system
Once all boiler connections have been completed, CH system can be filled.
The procedure is to be cautiously carried out, following each step:
• Open the bleeding valves on all radiators and verify the boiler automatic valve operation.
• Gradually open the relevant filler cock, checking any automatic bleeding valves installed in the system properly work (see Fig. 2 Filler cock).
• Close all radiator bleeding valves as soon as water starts coming out.
• Check on pressure gauge that water pressure reaches the 1÷1.3 bar reading.
• Shut the filler cock and bleed any air out again, by opening the air bleeding valves on radiators.
• Start the boiler and bring the system to working temperature, stop the pump, and repeat air bleeding procedure.
• Allow the system to cool and restore water pressure to 1÷1.3 bars.
WARNING
As for water treating in the domestic heating systems in order to optimise efficiency and safety, ensure a long life, trouble-free
operation of auxiliary equipment, minimise power consumption, thereby integrating the standards and rules in force in the
country of installation, it is recommended to use specific products suitable for multi-metal heating systems.
The water pH value must be between 7 and 8.
WARNING
The low water safety pressure switch will not electrically enable the burner ignition when water pressure is below 0.4-0.6 bar.
The CH system water pressure must not be lower than 1 bar. Otherwise, fill the heating system.
The procedure is to be followed while the system is cold.
Pressure gauge is used to read pressure inside the heating circuit.
3.18 Starting up the boiler
3.18.1 Preliminary checks
Before starting the boiler, check that:
• The flue gas venting duct and the relevant terminal are installed in conformity with the instructions: with the boiler operating, there must
be no leakage of combustion by-products from any of the gaskets.
• The supply power to the boiler must be 230 V ~ 50 Hz.
• the heating system is correctly filled with water (pressure gauge reading 1÷1.3 bar).
• Any shut-off cocks in the system pipes are open.
• the mains gas type is correct for the boiler calibration: convert the boiler to the available gas if necessary (see
Adaptation to other gas types
and burner adjustment
on page
55
). This operation is to be exclusively carried out by qualified personnel.
• The gas supply cock is open.
• There are no fuel gas leaks.
• The main switch installed adjacent to the boiler is turned on.
• The 3-bar safety valve is not stuck.
• There are no water leaks.
• The condensate trap installed on the boiler is discharging condensate correctly and is not stuck.
3.18.2 Switching on and switching off
To switch the boiler on and off, refer to the “Instructions for the User” (see
Instructions for the user
on page
8
).
Summary of Contents for minorca kr
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