Start-Up; Vacuum Pump; Adjustment Of The Thermostatic Valve (Option) And Adjustment Of The Temperature Class - BUSCH COBRA NC 0100 B Supplément Au Manuel D'installation Et De Maintenance

Start-up

CAUTION
The indications noted in this chapter replace the indications of the
standard installation and operating manuals!

Vacuum pump

Before setting up, you must familiarise yourself with the entire
installation and operating manual of the COBRA NC 0100 ... 0300 B.
Before operation, the pump must be filled with the relevant gear and
cooling oils (see also the installation manual).
In case of wrong rotation of the pump, extensive damage can occur.
Quickly press the Start / Stop button to check the rotation sense (see
"Electrical connection").
At temperatures near or below freezing point, the pump must run with
the relevant antifreeze in the cooling system.
After the start-up, the vacuum pump has to be controlled everyday
regarding any noise appearance. In such a case, immediately stop the
pump, see "Troubleshooting".
Adjustment of the thermostatic valve
(option) and adjustment of the
temperature class
The temperature class of the vacuum pump is defined for an inside (i)
and outside (o) area, see explosion protection group on the vacuum
pump and also this installation manual. The inside area is in contact with
the pumping medium and the outside area with the environment around
the pump.
WARNING
The keeping of the temperature class is controlled by the tempera-
ture sensors TSA+/ 0101, TSA+/ 0102 and TSA+/ 0103. The adjust-
ment values of the temperature sensors are defined in the "COBRA
ATEX Catalogue".
The temperatures checked depend on several running values. In order to
ensure a trouble-free running, the adjustment of the thermostat valve
(option) should be done when the specialized Busch fitters prepare the
starting of the pump.
The following running values have a direct influence on the checked
temperatures:
l Temperature of the gas entry (< 60 °C)
l Cooling medium (water, mixture of water-glycol or thermal oil)
l Differential pressure between the entry and outlet of cooling
medium
l Cooling medium temperature
l Pressure on suction side and pressure side
l Frequency used
l Ambient temperature
The following table shows the following recommendations for the
adjustment of the thermostatic valve in case of different running
conditions.
Start-up
Seite/ Page/ Page 18
Recommendation for the temperature adjustment of the COBRA NC 0100 B
Running frequency 50/ 60 Hz, T
environment
entry temperature < 60 °C Temperature class (o) outside T4
Tempera- Temperature
Cooling
ture class of cooling
medium
(i) inside medium [°C]
T4 Water < 25
Water-
T4 < 20
Glycol
Recommendation for the temperature adjustment of the COBRA NC 0200 B
Running frequency 50/ 60 Hz, T
environment
entry temperature < 60 °C Temperature class (i) inside T3
Tempera-
Temperature
ture class Cooling
of cooling
(o) out- medium
medium [°C]
side
T3, T4 Water < 40
Recommendation for the temperature adjustment of the COBRA NC 0200 B
Running frequency 50 Hz, T
environment
< 60 °C Temperature class (i) inside T4
Tempera-
Temperature
ture class Cooling
of cooling
(o) out- medium
medium [°C]
side
T4 Water < 40
If, on COBRA NC 0200 B, for an unspecified reason, the values given in
the tables above for the inlet water temperature, for position of
thermostatic valve or the cooling medium are not respected, cooling
must be adjusted in such manner so that the stabilized temperature,
measured by means of the temperature sensor TSA+/ 0102 to an
aspiration pressure not exceeding 10 mbar and with an overpressure at
the exhaust of 300 mbar, does not exceed 165 °C for T3(i) and 115 °C
for T4(i).
Recommendation for the temperature adjustment of the COBRA NC 0300 B
Running frequency 50 Hz, T
environment
< 60 °C Temperature class (o) outside T4
Tempera- Temperature
Cooling
ture class of cooling
medium
(i) inside medium [°C]
T4 Water < 25
Water-
T4 < 20
Glycol
Recommendation for the temperature adjustment of the COBRA NC 0300 B
Running frequency 50 Hz, T
environment
< 60 °C Temperature class (o) outside T3
Tempera- Temperature
Cooling
ture class of cooling
medium
(i) inside medium [°C]
T3 Water < 40
Water-
T3 < 40
Glycol
If, on COBRA NC 0300 B, for an unspecified reason, the values given in
the tables above for the inlet water temperature, for position of
thermostatic valve or the cooling medium are not respected, cooling
must be adjusted in such manner so that the stabilized temperature,
measured by means of the temperature sensor TSA+/ 0102 to an
-20 °C to +40 °C, Gas
Pressure diff.
Position of
of cooling
thermostatic
medium p
Diff.
valve
[bar]
3 to 6 0...4
3 to 6 0...4
-20 °C to +40 °C, Gas
Pressure diff.
Position of
of cooling
thermostatic
medium p
Diff.
valve
[bar]
3 to 6 0...4
-20 °C to +40 °C, Gas entry temperature
Pressure diff.
Position of
of cooling
thermostatic
medium p
Diff.
valve
[bar]
3 to 6 0...2
-20 °C to +40 °C, Gas entry temperature
Pressure diff.
Position of
of cooling
thermostatic
medium p
Diff.
valve
[bar]
3 to 6 0...2
3 to 6 0...1
-20 °C to +40 °C, Gas entry temperature
Pressure diff.
Position of
of cooling
thermostatic
medium p
Diff.
valve
[bar]
3 to 6 0...4
3 to 6 0...4
NC 0100...0300 B, Cat. 1
0870549526 (En/ De/ Fr)