3. Remove the anti-dust plug on the "heating return" inlet.
4. Connect the "heating circuit return" pipe to the "heating return" inlet on
the boiler.
5. Mount the filling and drain valves to the boiler's inlet and outlet (valves
not provided).
Important
To facilitate maintenance work, we recommend mounting a stop
valve on the heating flow and return pipes.
Caution
Position the safety valve between the boiler and the stop valve.
6. Mount the circulating pump on the "heating return" pipe (circulating
pump not provided).
6.3.2
Connecting the expansion vessel
1. Determine the volume of the expansion vessel according to the
volume of water in the heating circuit.
2. Connect the expansion vessel to the heating circuit return pipe.
Volume of the expansion vessel on the heating circuit
Terms and conditions of validity:
Safety valve calibrated to 0.4 MPa (4 bar).
Average water temperature: 70°C.
Heating circuit flow temperature: 80°C.
Heating circuit return temperature: 60°C.
Fig.41
4
3
MW
-3
0
0
0
0
3
0
-0
3
Fig.42
MW
-3
0
0
0
0
2
9
-0
4
5
Fig.43
MW
-3
0
0
0
0
3
1
-0
2
6
6 Installation
7609493 - v08 - 24072018
39
