Choice Of Room; Regulation By Sensor Or By Vacuum Switch - MIL'S HOSPIVAC G EVISA E350.R Manual De Operación Y Mantenimiento

4.

CHOICE OF ROOM

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:
With:
Q = Ventilation volume (m³/h)
P = Vacuum pump energy consumption (kW)
ΔT = Temperature difference between the local and outdoor
-1
1250 = Volumetric heat capacity Cp (J.m³.K )
Example : Vacuum pump power 16.5 kW
ΔT eligible = 10°C
The air inlet area must be dimensioned such that the flow rate does not exceed 3 m/s.
(Extreme tolerance to 5 m/s).
For information purposes, the table below gives the amounts of heat that must be extracted, according to
the installed capacity in kW.
Total
installed Heat released
capacity
kW kW/h kJ/h
5 5.22 18792
10 10.45 37620
15 15.67 56512
20 20.90 75240
25 26.12 94032
30 31.35 112860
The person in charge of the installation has overall responsibility of the product environment requirements.
He is also in charge of setting up methods of struggle against fire and to protect vacuum units against
shocks, flooding, earthquake and corrosion.
The technician or exploiting is responsible for building construction and civil engineering infrastructures or
earthwork.
Outdoor deadline pressure (snow, wind, rain..) must be taken into account.
Environmental constraints must be managed.
According to the standards NFS99-175 (§ 5-7-3), ISO 10083, ISO 7396-1 (§ 5-8) vacuum units must not be in
the same room as O concentrator, gas bottles and non-cryogenic liquid.
2
517463-07
HOSPIVAC G E350.R
Ventilation of room
Ventilation Air inlet area
flow rate of 3 m/s
Th/h kCal/h m³/h (m
2
4.3 4300 1440 0.14
8.6 8600 2880 0.28
12.9 12900 4320 0.42
17.2 17200 5760 0.56
21.5 21500 7200 0.7
25.8 25800 8640 0.84

E600.R
5.

REGULATION BY SENSOR or BY VACUUM SWITCH

Vacuum plants fitted with the PROCOM-2 or CYCLIC 2020 are regulated by a 4/20mA analogue sensor
which measures pressures in ABSOLUTE terms and can transmit the values to the monitors selected by the
user, in either RELATIVE or ABSOLUTE mode. This measurement principle means that plants can be
installed at any altitude without the need to make corrections.
Note: for the PROCOM-2 and the CYCLIC 2020 the analogue sensor is backed up by mechanical vacuum
switches fitted as a safety measure, which must be set according to the altitude at which they are used. The
standard value release: -450 mbar.
Altitude
in m
0
100
200
300
400
500
1000
1500
2000
2500
It should be noted that vacuum pump flow rates vary according to the altitude at which they are installed
and the temperature of the air pumped.
)
FLOW RATE CORRECTION TABLE ACCORDING TO ALTITUDE AND TEMPERATURE
Altitude Correction
in m coefficient
0 to 50
60 to 300
350 to 500
550 to 1000
1050 to 1500
1550 to 2000
2050 to 3000
PRESSURE CORRECTION TABLE ACCORDING TO ALTITUDE
Average pressure
Correction Coefficient
in mbar
1013 1
995 0.98
984 0.97
974 0.96
964 0.95
955 0.94
893 0.88
840 0.83
791 0.78
700 0.69
Example
Temperature
for 50 m³/h,
of pumped air
sea level
1 50 -10
0.95 47.5 zéro
0.94 47 +20
0.88 44 +50
0.83 41.5 +100
0.78 39
0.69 34.5
Keep
the factory setting
Modify
the factory setting
using this data
Correction Example for
coefficient 50 m³/h at 20°C
1.11 55.5
1.07 53.5
1 50
0.9 45
0.78 39
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