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1.25 SYSTEM FILLING
1. Loosen the cap of the automatic vent valve on the circulating pump.
2. Slowly open the filling valve (Par. 1.6) to ensure release of air bubbles in the water via the appliance and central heating system vents.
3. Close the filling cock when the boiler pressure gauge indicates approx. 1.2 bar.
4. Open the radiator vent valves.
5. Close radiator vent valves when only water escapes from them.
During these operations, enable the automatic vent functions on the appliance (Parag. 3.20);
1.26 FILLING THE CONDENSATE DRAIN TRAP
When the appliance is switched on for the first time, combustion products come out of the con-
densate drain. After a few minutes of operation, check that combustion flue gases are no longer
coming out of the condensate drain; this means that the drain trap has filled to a correct con-
densate height that the flue gases cannot pass through.
1.27 GAS SYSTEM START-UP.
To start up the system, refer to the technical standards in force.
This divides the systems and, therefore, the commissioning operations, into three categories: new systems, modified systems, reactivated
systems.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or naked flames;
- bleed all air from pipelines;
- ensure the internal system is properly sealed according to the specifications set forth by technical regulations in force.
