Operation; Constant Vacuum Regulation Type; Choice Of Room - MIL'S HOSPIVAC V3 SIRELLA General Installation And Maintenance Instructions

General installation and maintenance instructions
HOSPIVAC V3 SIRELLA with PM-2 or CYCLIC 2020
HOSPIVAC G SIRELLA with PM-2 or C2020 or MILLENIUM
SECTION 3.
The air conveyed by the vacuum network passes through the main bacteria filter, enters the main receiver and is
then sucked by the vacuum pump(s) of the vacuum unit/plant.
The exhaust system consists of an exhaust hose fitted and a drain valve to collect condensate at the lowest point
of the network.
3.1.

Constant vacuum regulation type

When the vacuum pump is switched on, the operation is forced during a FLEXO time: FLEXO regulation.
During this time, it's necessary to limit the vacuum level. So, when the network pressure reaches –880 mbar, the
constant vacuum solenoid valve opens in order to inject a sufficient volume of air under the suction valve of the
vacuum pump to generate a difference of pressure upstream and downstream from this valve so that it is closed.
When the network pressure reaches –830 mbar, the constant vacuum solenoid valve is closed, the suction valve
of the vacuum pump opens and the vacuum pump operates. This simple system makes possible "to disconnect"
the vacuum pump of the network in full safety and to ensure a constant vacuum.
Normal operation = solenoid valve is closed
P1 = P0
SECTION 4.
The unit must be located in a clean, non-humid, non-saline, dustless and ventilated local whose the temperature
should be between +5C and +40C.
Forced ventilation controlled by a thermostat must be installed to ensure adequate room ventilation.
The following formula can be used to size the fan:
The following formula can be used to size the fan:
Q = P x 1000 x 3600 = 2880 x N
∆T x 1250
Q = Ventilation volume (m³/h)
P = vacuum pump energy consumption (kW)
∆T = Temperature difference between the local and outdoor
1250 = Volumetric heat capacity Cp (J.m³.K
Exemple: Vacuum pump power 16.5 kW
∆T eligible = 10°C
Q = 2880 x 16.5 = 4752 m³/h
The air inlet area must be dimensioned such that the flow rate does not exceed 3 m/s
Extreme tolerance of 5 m/s
S = Q
Vair x 3600

OPERATION

P1
the suction valve is opened

CHOICE OF ROOM

∆T
-1
)
10
= 4752 = 0.44 m
3 x 3600
Manual N° 519923 version 4
Discharge = solenoid valve is opened
P0
P1 > P0 the suction valve is closed
2
P1 P0
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