62
Aermec code 6755530_03 9.2011
ANK 025-085H
Standard factory-set pressure value of expansion
vessel is 1.5 bar, maximum value is 6 bar.
Vessel calibration must be regulated depending on
the maximum level difference (H) of the user (see
figure) in agreement with the following formula:
p
(calibration) [bar] =
H
[m] / 10.2 + 0.3.
For example: if level difference (H) is equal to 20 m,
the calibration value of the vessel will be 2.3 bar.
If the calibration value obtained from formula is
less than 1.5 bar (i.e. for H < 12.25), keep standard
calibration.
14. EXPANSION VESSEL CALIBRATION
KEY
(1)
Check that highest installation is not high-
er than 55 metres.
(2) Ensure that lowest installation can with-
stand global pressure in that position.
15. MINIMUM WATER CONTENT
ANK
020
030
040
045
050
085
Number of compressors
n°
1
1
1
1
1
1
Recommended minimum water content
l/kW
10
10
10
10
10
10
ATTENTION
It is recommended to design
systems with high water content
(minimum recommended values
shown in table), in order to limit:
1. The hourly number of
inversions between operating
modes.
2. Drop in water temperature
during winter defrost cycles.
3. Use of a value lower than
that recommended causes a
greater reduction of the water
temperature. Without com-
promising correct operation of
the unit I
T IS RECOMMENDED
NOT TO DROP BELOW 4l/kW.
Hmax1 = 55m
H = 12,25m
Hmin2
H
