9
FALCON
Fig. 8
Pressure loss diagram
SIZING OF ADDITIONAL EXPANSION VESSELS:
Deduct from the value given in the table the 8 litre
vessel supplied.
Note:
1.
Fill C.H. installation to min. 1.5 bar.
2.
Select the expansion vessel for a system
pressure of 2.0 bar.
3.
Expansion vessel must be fi tted to central
heating return pipe.
4.
The standard 7 litre expansion vessel is
charged to 1 bar.
5.
The additional expansion vessel should be
charged to 1 bar.
SAFETY VALVE
SETTING (bar)
VESSEL CHARGE
PRESSURE (bar)
INITIAL SYSTEM
PRESSURE (bar)
TOTAL WATER
CONTENT of SYSTEM
3.0
0.5 1.0 1.5
1.0 1.5 2.0 1.5 2.0 2.0
EXPANSION VESSEL VOLUME (litres)
LITRES
25 3.5 6.5 13.7 4.7 10.3 8.3
50 7.0 12.9 27.5 9.5 20.6 16.5
75 10.5 19.4 41.3 14.2 30.9 24.8
100 14.0 25.9 55.1 19.0 41.2 33.1
125 17.5 32.4 68.9 23.7 51.5 41.3
150 21.0 38.8 82.6 28.5 61.8 49.6
175 24.5 45.3 96.4 33.2 72.1 57.9
200 28.0 51.8 110.2 38.0 82.4 66.2
0.140 0.259 0.551 0.190 0.412 0.33
For syst. volumes other than
those given above, mult. the syst.
volume by the factor across
m |h
3
Q
8
7
6
5
4
3
2
1
0
0.5
1.5
2.5
1
2
H
mbar x 100
2.06 Pump characteristics
The pump head available for circulating the water is given in fi g. 7.
N.B.
- The pump is factory set at position 3. The pump is a Grundfos
type 15-50 UPS series.
Grundfos Pump performance graph
Note
- Minimum fl ow through boiler heat exchanger at any time
should not fall below 6 litres per minute.
If the total volume of water in the system exceeds 40 litres an
additional expansion vessel must be fi tted to the central heating
return pipe.
Fig. 7
1 2 3
Speed settings
A
Boilers pressure drop
B
Available pump head C.H.
