Installation | 5
Instruction Manual COBRA NC 2500 B WCV_EN_en 15 | 52
NOTE
Water hardness unit conversion.
1 mg/l (ppm) = 0.056 °dh (german degree) = 0.07 °e (english degree) = 0.1 °fH (french degree)
5.2.4 Barrier Gas System Connection
Without nitrogen panel
Description
BGC Barrier gas connection FME Flow meter
FR Flow regulator MAN Manometer
PRV Pressure regulating valve
● Connect the barrier gas connection (BGC) to the gas supply.
Connection size:
– G1/4, ISO 228-1
● 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 SLM (standard li-
ter per minute)
30
Air quality (only for air) Acc. to ISO
8573-1
Class 5.4.4.
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