Circulating Pump Characteristics; Mixing Valve Characteristics; Characteristics Of The Expansion Vessel - geminox FCX 22 C Technical Instructions

5 - CIRCULATING PUMP CHARACTERISTICS

The circulating pump is equipped with a 3-speed
motor with a 88 W maximum power input.
The heating pump's power consumption can be si-
gnificantly optimised by adapting its speed to the re-
quirements of the installation and by using the
control devices that are offered as options

6 - MIXING VALVE CHARACTERISTICS

Fig. 4
100
90
80
70
60
50
40
30
20
10
0
1

7 - CHARACTERISTICS OF THE EXPANSION VESSEL

FCX boilers are pre-equipped with an expansion
vessel for an installation water capacity of approxi-
mately 62 liters (section 9.2 - page 31 - chapter IV -
INSTALLATION).
The expansion vessel absorbs the increase in the
water volume in the installation produced by the in-
crease in temperature. The pre-inflation of the ves-
sel sends the internal membrane to the side of the
connection and the water dilation pushes on this
membrane. Optimum efficiency is obtained when
the inflation pressure is equal to the water pressure.
Note:
- The minimum water pressure necessary for the
correct working of the installation is defined by
the difference in levels between the boiler and the
highest point in the installation (e.g. 8 m = 0.8
bar).
2 3 5 7 9 10
Setting button position
TECHNICAL SPECIFICATIONS
Fig. 3
6
5
4
3
2
1
0
0
Débit / Water flow / Durchfluß (m
300
200
100
40
20
10
5
2
1
40 50 100 200 500 1000 2000 4000
Pressure drop (mmCE)
Fig. 5
Water inlet
Membrane
Max vessel
Inflating
valve volume
- 8 -
RS 15/5-3 130
0 3,3
0,5 2,2
0 5,4 1 1,3
0,5 5 1,5 0,6
1 4,4 0 4,8
1,5 3,9 0,5 3,9
2 3,2 1 3
2,5 2,5 1,5 2,1
2 1,4
1 2
3
/h)
H
Dilated water
volume
Pressure rises
as the air is
compressed
3