BUSCH COBRA ATEX NC 2500 B, Instruction Manual

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Product Description | 2
Instruction Manual COBRA NC 2500 B WCV_EN_en 7 / 44
2.4 Standard Features
2.4.1 Water Cooling
The machine is cooled by a cooling liquid circuit in the cylinder cover and cylinder.
The cooling liquid pump (CLP) allows a recirculating flow in the cooling liquid cham-
ber.
The motor of the cooling liquid pump must be electrically connected, see Electrical
Connection of the Cooling Liquid Pump [ ► 20]
The cooling liquid is cooled by a plate heat exchanger (PHE) which must be connect-
ed to the water main.
2.4.2 Cooling Gas Unit
The purpose of the cooling gas unit (CGU), including an air filter is to cool the com-
pression chamber and reduce the amount of heat generated by the compression of
the process gases.
By inlet pressure < 300 mbar, cooling air is automatically drawn in through an air filter.
2.4.3 Resistance Thermometer (Cooling Liquid)
The resistance thermometer monitors the cooling liquid temperature of the machine.
Warning and trip signals must be set, see Wiring Diagram Resistance Thermometer
[ ► 21] .
2.4.4 Resistance Thermometer (Exhaust Gas)
The resistance thermometer monitors the exhaust gas temperature at the machine
discharge.
Warning and trip signals must be set, see Wiring Diagram Resistance Thermometer
[ ► 21] .
2.4.5 Sealing Systems
The machine is equipped with labyrinth seals on the motor side and suction side.
Other sealing systems are optionally available, see Mechanical Seals [ ► 8] .
Sealing systems prevent the process gas going to the bearings chambers.
The sealing systems include a barrier gas system, see Barrier Gas System Connection
[ ► 14] .