DOMINA F24 N / F28 N / F32 N
19
EN
cod. 3541E094 - Rev. 00 - 06/2014
4.2 Start-up
B
Checks to be made at first lighting, and after all maintenance operations that
involved disconnecting from the systems or work on safety devices or parts of
the boiler:
Before lighting the boiler
•
Open any on-off valves between the boiler and the systems.
•
Check the tightness of the gas system, proceeding with caution and using a soap
and water solution to detect any leaks in connections.
•
Check the correct preloading of the expansion tank (ref. sec. 5.4)
•
Fill the water system and make sure that all air contained in the boiler and the sys-
tem has been vented by opening the air vent valve on the boiler and any vent valves
on the system.
•
Make sure there are no water leaks in the system, hot water circuits, connections or
boiler.
•
Check the correct connection of the electric system and the functioning of the earth
system. l
•
Check that the gas pressure value for heating is as required.
•
Make sure there are no flammable liquids or materials in the immediate vicinity of
the boiler
Checks during operation
•
Turn the unit on as described in sec. 2.3.
•
Check the tightness of the fuel circuit and water systems.
•
Check the efficiency of the flue and air-fume ducts while the boiler is working.
•
Make sure the water is circulating properly between the boiler and systems.
•
Make sure the gas valve modulates correctly in the heating and domestic hot water
production phases.
•
Check the proper lighting of the boiler by performing several tests, turning it on and
off with the room thermostat.
•
Make sure the fuel consumption indicated on the meter matches that given in the
technical data table on sec. 5.4.
•
Make sure that, with no heating demand, the burner lights correctly on opening a hot
water tap. During heating operation, check that on opening a hot water tap the heat-
ing circulating pump stops and there is regular production of domestic hot water.
•
Check the correct position of the DIP SWITCHES.
4.3 Maintenance
Periodical inspection
To ensure proper operation of the unit over time, have qualified personnel carry out a
yearly inspection, providing for the following checks:
•
The control and safety devices (gas valve, flow switch, thermostats, etc.) must func-
tion correctly.
•
The fume exhaust circuit must be perfectly efficient.
(Sealed chamber boiler: fan, pressure switch, etc. - The sealed chamber must be
tight: seals, cable glands, etc.)
(Open chamber boiler: anti-backflow device, fume thermostat, etc.)
•
The air/fume terminal and ducts must be free of obstructions and leaks
•
The burner and exchanger must be clean and free of deposits. Do not use chemical
products or wire brushes to clean.
•
The electrode must be properly positioned and free of deposits.
•
The gas and water systems must be tight.
•
The pressure of the water in the system when cold must be approx. 1 bar; otherwise,
bring it to that value.
•
The circulating pump must not be blocked.
•
The expansion tank must be filled.
•
The gas flow and pressure must match that given in the respective tables.
A
The casing, control panel and aesthetic parts of the boiler can be cleaned with
a soft damp cloth, possibly soaked in soapy water. All abrasive detergents and
solvents should be avoided.
Opening the casing
To open the boiler casing:
1.
Undo the screws A (see fig. 12).
2.
Turn the casing (see fig. 12).
3.
Lift the casing.
B
Before carrying out any operation inside the boiler, disconnect the power supply
and turn off the gas cock upstream.
fig. 12 - Opening the casing
Combustion analysis
Two sampling points have been included at the top of the boiler, one for fumes and the
other for air. To take the samples:
1.
Open the air/fume outlet plug;
2.
Insert the probes as far as the stop;
3.
Check that the safety valve is connected to a drain funnel;
4.
Enter TEST mode;
5.
Wait 10 minutes for the boiler to stabilize;
6.
Take the measurement.
fig. 13 - Fume analysis
1 =
FUMES
2 =
AIR
3
2
A
A
1
1
2
Содержание DOMINA F24 N
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