System Filling; Evacuation Of Air During System Filling - Ferroli JOLLY Plus 2 VERSIONE VM-F Installation Manual

INSTALLATION

System filling

During system start-up make sure the holder of the hydraulic unit is open . In case of a power failure and the thermal
valve has already been previously fed, the special cap must be used to press the valve shutter to open it .

Evacuation of air during system filling

- Open all system shutoff devices (manual or automatic);
- Start filling by slowly opening the system water filling tap;
- For models installed in a vertical position, operate (using a screwdriver) on the highest coil vent (Fig .1 ref . A); for
units installed in a horizontal position, operate on the highest vent (Fig .1 ref . B) .
- When water starts coming out of the unit's vent valves, close them and continue filling up to the nominal value
foreseen for the system . Check the tightness of the seals . It is advisable to repeat this operation after the unit has
been operating for a few hours and to periodically check the system pressure .
Fig .1
A
B
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