Technical data

16
MCR 24, 24/28 MI, 30/35 MI, 34/39 MI 08/06/06-300008460-001-B
Hydraulic specifications
1 Boiler pump
Depending on the flow, the following diagrams represent::
manometric heights available at boiler outlet.
For a fixed flow, the manometric height available at the boiler outlet
is obtained by taking the difference between the manometric height
of the circulator pump and the loss of load in the boiler.
• MCR 24, MCR 24/28 MI
• MCR 34/39 MI
X: Rated net head
Y: Flow rate

: High manometric pump

: Low pressure pump
2 Expansion chamber
The boiler is fitted as standard with an 8-litre expansion tank (except
MCR34/39 MI) (Initial pressure of the expansion tank 1 bar). The total
water volume is determined according to the static height of the
installation and for an average water temperature of 80°C (Outlet :
80; Return : 60).
If the water volume is greater than 100 litres or the static height of the
system exceeds 5 metres, an additional expansion tank must be
fitted.
Pressure: Safety valve 3
Initial pressure of the expansion tank (bar) 0.5 1 1.5
Total water volume (litres) Volume of the expansion vessel (litres)
100 4.8 8 13.3
125 6 10 16.6
150 7.2 12 20
175 8.4 14 23.3
200 9.6 16 26.6
250 12 20 33.3
300 14.4 24 39.9
To obtain other volumes, multiply the volume of the system by one of the factors: 0.048 0.080 0.133