Supplied By www.heating spares.co Tel. 0161 620 6677
13
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
Version - 09.2002
Expansion tank
It is connected to the pump casing via a pipe with a fork connection. On the 24kW version, it is located
above the pump, while on the 30kW version it is located behind the exchanger, inside the frame. The
expansion tank contains a diaphragm in contact, on one side, with the system water and, on the other side,
with the air under pressure (pre-loaded to 1 bar) inside the tank. By the expansion of the diaphragm and
ensuing compression of the air, the tank compensates for the thermal expansion of the water in the
heating system.
Twin Heat Exchanger
The exchanger is a copper laminar assembly. It comprises a thickly finned portion, three circular pipes
containing the heating water and, inside them, another three pipes in the form of a spiral containing the
tap water. The heating water exchanges directly with the burnt gases, while the tap water does not have
this kind of exchange, it receives heat indirectly from the water in the three heating pipes. In this way, the
surface of the coil does not reach very high temperatures so less scale gets formed. In addition, being very
small, it makes the water speed very high over its entire section, making mineral deposits of any kind
negligible. The typical omega shape of the finning ensures an even distribution of the heat over all the
finning, with consequent benefits in terms of exchange efficiency and the life of the exchanger. A special
surface treatment protects the exchanger against oxidation and corrosion.
30kW 10-litre
version
24kW 7-litre
version