AERMEC ANZ 020 - Expansion Tank Calibration; Expansion Tank Pressure and Calibration; Plant Static Pressure Graph

20
Expansion tank calibration
The expansion tank has a 1.5 bar stan-
dard pressure charge. The maximum
value is 6 bar.
The tank calibration must be adjusted
according to the maximum height diffe-
rence (H) of the terminal unit (Pict. 1) The
charge pressure of the expansion tank, in
bars, must be:
Calibration [bar] = H [m] / 10,2 + 0,3.
For example if the value of height diffe-
rence is 15 metres the expansion tank
calibration will be 1,8 bar.
If the calculation results below the stan-
dard calibration
(1.5 bar) no adjustment is required.
Hmax
*
= 55m
H = 12,25m
Hmin
**
H
AN
Fig. 1
ANZ
0
20
40
60
80
100
120
140
160
01234 5
6
7891011
m
A
B
C
D
E
F
G
H
I
Water flow (m
3
/h)
Available static pressure (kPa)
Available static pressure for plant
A = ANZ 0207
B = ANZ 0257
C =
ANZ 0307
ANZ 0417
D = ANZ 0507
E = ANZ 0807
F = ANZ 0907
G = ANZ 1007
H = ANZ 1507
I = ANZ 2007
N.B. Available static pressure (net pressure) without pressure loss in the unit.