6 | Commissioning
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If the machine corresponds to ATEX Classification “C” , “D” or “E” (see
tions and Associated Accessories [
• Make sure that the machine has been purged by an inert gas, see
.
• Turn on the water supply.
• Adjust the thermostatic valve position according to the process requirements.
• See
Adjustment of the Thermostatic Valve (Direct Cooling Only) [
.
If the machine is equipped with a barrier gas system:
• Turn on the barrier gas supply.
• Adjust the barrier gas pressure and volume flow.
• Switch on the machine.
• Make sure that the maximum permissible number of starts does not exceed 6 starts
per hour. Those starts should be spread within the hour.
• Make sure that the operating conditions comply with the
.
If the machine is equipped with a plate heat exchanger (PHE):
• After a few minutes of operation, perform a
Cooling Liquid Level Inspection
• After a few minutes of operation, perform an
.
As soon as the machine is operated under normal operating conditions:
• Measure the motor current and record it as reference for future maintenance and
troubleshooting work.
6.1 Adjustment of the Thermostatic Valve (Direct
Cooling Only)
The adjustment of the thermostatic valve (TV) influences the temperature class of the
machine.
Other factors have a direct influence on the monitored temperatures (i.e. gas inlet tem-
perature, gas inlet pressure, cooling medium, water temperature, ambient temperature,
etc…).
The table below shows the recommendations for thermostatic valve adjustments:
Machine type
Temp.
class
(inside)
Temp.
class
(ouside)
Water inlet
temp.
Water inlet
temp.
(with Water/
Glycol)
Thermostatic
valve position
range
NC 0100 B
T4(i)
T4(o)
< 25°C
< 20°C
0 … 4
T3(i)
T3(o)
< 30°C
< 30°C
0 … 4
NC 0200 B
T4(i)
T4(o)
< 40°C
< 30°C
0 … 2
T3(i)
T4(o)
< 40°C
< 30°C
0 … 4
T3(i)
T3(o)
< 40°C
< 30°C
0 … 4
NC 0300 B
T4(i)
T4(o)
< 25°C
N/A
0 … 2
T4(i)
T4(o)
N/A
< 20°C
0 … 1
T3(i)
T3(o)
< 40°C
< 40°C
0 … 4
• If you need any further information, contact your Busch representative.
Summary of Contents for COBRA ATEX NC 0100-0300 B
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