BUSCH COBRA NC 0100 B, Instruction Manual

Page: 14 / 48

5 | Installation
14 | 48 Instruction Manual COBRA NC 0100-0300 B ACV_EN_en
●
Connect the barrier gas connection (BGC) to the gas supply.
Connection size:
– G1/4, ISO 228-1
●
Electrically connect the flow switch (FS) of the flow meter, see Wiring Diagram Flow Switch [
➔
25].
If a pressure switch is installed:
●
Electrically connect the pressure switch, see Wiring Diagram Pressure Switch (Optional) [
➔
25].
●
Make sure that the gas complies with the following requirements:
Gas type Dry nitrogen or air
Gas temperature °C 0 ... 60
Maximum gas pressure bar 13
Recommended pressure setting at the pres-
sure regulating valve (PRV) bar(a) 3
Filtration µm 5
Recommended flow rate
for labyrinth seals, oil lubricated single me-
chanical seals and PTFE shaft seals SLM (standard li-
ter per minute) 2.5 ... 3
Recommended flow rate
for gas lubricated double mechanical seals SLM (standard li-
ter per minute)
≤
1
Air quality (only for air) Acc. to ISO
8573-1 Class 5.4.4.
5.2.4 Dilution Gas System Connection (Optional)
PRV DGC MAN FME, FR NIP
Description
DGC Dilution gas connection FME Flow meter
FR Flow regulator MAN Manometer
NIP Nitrogen panel PRV Pressure regulating valve