2- Filling The System - RED LOGIKA 25-35 Installation Manual

2- FILLING THE SYSTEM

FILLING THE SYSTEM
Fill the system slowly to allow air bubbles to pass through the vent holes of the heating system. For closed circuit heating systems, the
filling pressure of the system at cold and the pre-inflation pressure of the expansion tank must be the same.
• The water used for filling the heating system must be decontaminated and not contain air.
Attention!
Do not mix heating water with incorrect concentrations of anti-freeze or anti-corrosion substances! This could
damage the gaskets and cause noise during operation.
After making all the hydraulic connections, pressure-test the seals by filling the boiler.
Before filling, check the filling pressure of the expansion tank.
This must be done with care by doing the following:
• open the air vent valves of the radiators, boiler and system;
• gradually open the filling tap of the system, making sure that any automatic air vent valves in the system work correctly;
• close the vent valves of the radiators as soon as water comes out;
• check at the pressure gauge of the system that the pressure reaches 1 bar approx.
• close the filling tap of the system and then open the vent valves of the radiators again to purge any air;
• check the seal of all the connections;
• after starting up the boiler for the first time and bringing the system up to temperature, stop the pumps and repeat the air purging
procedure;
• allow the system to cool down and, if necessary, bring water pressure back up to 1 bar;
2