Dräger PSS BG 4 plus - Page 52

PSS BG 4 Service Manual
Draeger Safety, Inc.
Checking the Inhalation Valve
1 Set “set positive pressure pumping”.
2 Tightly pinch the exhalation hose with your
hand.
3 Start pumping slowly until
4 10 mbar is indicated on the pressure gauge.
If the system does not reach 10 mbar:
• Replace inhalation valve or valve disc (see
“Fitting the Plug-In Coupling”)
Checking the Exhalation Valve
1 Set “negative pressure pumping”.
2 Tightly pinch the inhalation hose with your
hand.
3 Pump once until
4 –10 mbar is indicated on the pressure gauge.
If the system does not reach –10 mbar:
• Replace exhalation valve or valve disc (see
“Fitting the Plug-In Coupling”)
Page 52
Draeger Training 11/16 rev 1