DOMINA N 80 DGT
27
4. COMMISSIONING AND TESTING
4.01 Checks to be carried out before starting up for the fi rst time
When starting the boiler up for the fi rst time check:
• that the gate valves between the boiler and central heating systems are open;
• that the central heating system is fi lled and vented;
• that there are no gas or water leaks from the central heating system or boiler;
• that the electric connections are correct and the earth wire of the boiler is connected to an effi cient earthing
installation and a 3amp. fuse is fi tted to the isolator;
• that there are no fl ammable liquids or materials near the boiler;
4.02 Starting up the boiler
• Open the gas cock upstream of the boiler.
• Vent air present in the pipe upstream of the gas valve.
• Turn on electrical supply to the boiler.
At this point, choose whether the boiler is to be used for central heating and domestic hot water production
or for domestic hot water production only.
4.03 Shutting down
Close the boiler isolation gas cock and turn off the electricity to the boiler.
Important:
If the boiler is not to be used for lengthy periods during the winter, to avoid frost damage, you are
recommended to drain the water from the circuits (domestic hot water and central heating). Alternatively, drain the
domestic hot water system only and add special anti-freeze to the central heating system.
4.04 Checks and controls after fi rst start-up
• Check there are no leaks in the gas and water circuits.
• Check correct boiler start up by carrying out start up and shut down tests using the boiler stat.
• Check the integrity of the air-fl ue pipes during boiler operation.
• Check that the gas consumption indicated on the meter corresponds to that given in Technical Data (page 5).
• Check that water is circulating correctly. Balance the radiators to ensure that the flow and return
differential does not exceed 20°C.
• Check that the pump stops and domestic hot water is produced correctly when the hot water tap
is turned on.
• Check that the burner lights up and shuts down correctly when the domestic hot water tap is turned
on and off.
• Check that the domestic hot water fl ow and T correspond to the table. Do not rely on empirical measurements.
Temperature should be measured using thermometers as near as possible to the boiler, bearing in mind
the heat loss from the pipes.
• Check that the gas valve modulates correctly both during the central heating phase and the domestic
hot water production phase.
• Determine the combustion effi ciency and the composition of the fl ue gases (refer to 6.04)
• If any of the above are not correct refer to Technical Data (page 5). Adjustment (refer to 5) and Fault
fi nding (page 37).
Содержание DOMINA N 80 DGT
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