FERROLI FG - Manuel (Page 9)

FG
9 GB
cod. 3540I950 - 06/2007 (Rev. 00)
2.4 Safety coil connection (optional)
An external (cooling circuit) safety heat exchanger (optional) can be supplied together with the boiler.
In countries where Standard EN 303-5 is applied, the boiler must have a system enabling a safety outlet for the excess
heat without additional energy. In this way the maximum boiler water temperature will not exceed 100 °C (overheating
protection).
The minimum cooling water supply pressure must be 2.0 bar. A flowrate of at least 10 l/min. must be available.
• Remove the flange “A” located at the back of the boiler.
• Install the coil “N”, fixing it with the 4 bolts.
• Fit the safety valve "P" on the outlet of the coil "N", respecting the direction of the arrow. Insert the valve probe "Q"
in the special sheath "G". Connect the water inlet directly to the safety coil. Connect the valve outlet.
fig. 3 - Safety heat exchanger connection