TF7038GB_A_NOT
10.2
SETTING THE EXPANSION VESSEL
The standard value for the preload pressure
of the expansion vessel is 1.5 bar, the
maximum value is 6 bar.
Adjust the vessel according to the maximum
difference in height (H) of the consumption
point (see figure) according to the following
formula:
p
setting
[bar] =
H[m]
+ 0.3
If, for example, the value of the height
difference H equals 20 m, the setting value
of the vessel is 2.3 bar.
If the setting value obtained by the calculation
is less than 1.5 bar (i.e. for H < 12.25), the
standard setting must be retained. For height
differences of over 55 m, a special solution
must be
determined. The pressure relief valve and expansion vessel are not designed for this purpose.
Key
Hmax
Ensure that the highest consumption point does not exceed the height
difference of 55 metres.
Hmin
Ensure that the lowest consumption point can withstand the total
pressure at this point.
Reference operating conditions:
Max. water temp. = 60°C,
Min. water temp. = 15°C
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