44
The expansion vessel is preloaded with pressurised air through the valve
accessible from the special maintenance compartment (Fig.1, Face F).
The preload value with which the expansion vessel is supplied by the man-
ufacturer is in agreement with the parameters SP and RP set as default,
and anyway it satises the following equation:
Pair = SP – RP – 0.7 bar Where:
- Pair = air pressure value in bar
- SP = Set Point (par. 5.3.1) in bar
- RP = Reduction of pressure to restart
(par. 5.5.1) in bar
So, by the manufacturer: Pair = 3.0 – 0.3 – 0.7 = 2.0 bar
If different values are set for the parameters SP and/or RP, regulate the
valve of the expansion vessel releasing or letting in air until the above
equation is satised again (e.g.: SP=2.0bar; RP=0.3bar; release air from
the expansion vessel until a pressure of 1.0 bar is reached on the valve).
Failure to respect the above equation may lead to malfunctions
of the system or to premature breakage of the diaphragm inside
the expansion vessel.
Considering the expansion vessel capacity of only 1 litres, any
operation to check the air pressure must be performed by con-
necting the pressure gauge very rapidly: on small volumes the
loss of even a limited quantity of air can cause an appreciable
drop in pressure. The quality of the expansion vessel ensures
the maintenance of the set air pressure value, proceed to check
it only at calibration or if you are sure of a malfunction.
Any operation to check and/or reset the air pressure must be
performed with the delivery system not under pressure: discon-
nect the pump from the power supply and open the utility nearest
to the pump, keeping it open until it no longer gives any water.
The special structure of the expansion vessel ensures its quan-
tity and duration over time, especially of the diaphragm which
is typically the component subject to wear for items of this type.
However, in the case of breakage, the entire expansion vessel
must be replaced and exclusively by authorised personnel.
1.3 Technical characteristics
Topic
Parameter
e.sybox mini³
ELECTRIC
POWER SUPPLY
Voltage* 1x220-
240 V
1x230 V 1x110-
127 V
Frequency 50/60 Hz
Maximum power 850 W
Leakage current to
earth
<2 mA
STRUCTURAL
CHARACTERISTICS
Overall dimensions 445x262x242 mm without feet
support
Empty weight
(excluding packaging)
14 kg / 30,8 lb
Protection class
IP x4
Insulation class of the
motor
F
HYDRAULIC
PERFORMANCE
Maximum head 55 m / 180 ft
Maximum ow rate 80 l/min / 21 U.S. GPM
Priming
<5min at 8m / 26 ft
Maximum working
pressure
7.5 bar / 109 psi
WORKING
CONDITIONS
Max liquid temper-
ature
40 °C / 104 °F
Max environment
temperature
50 °C / 122 °F
Environment tempera-
ture of storage
-10÷60 °C / 14÷140 °F
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