Metrohm 709 IC Pump - Manual (Page 26)

2 Installation
709 IC Pump
18
2.7 Deaerating the pump
The purge valve 24 is opened by turning anticlockwise and the pump
can now be deaerated by pressing the key 9.
The solvent bottle should be located somewhat above the pump, but at
least at the same level as the pump head 18 (never below the pump).
When the key is pressed the pump operates at the maxi-
mum flow rate (5 mL/min).
For safety reasons the key 9 functions only in the stop
mode of the pump, i.e. the key is disabled when the pump
is running in normal operation.
Should the pump not prime by itself, the 6.2816.020 syringe supplied is
used to siphon off solvent via the outlet capillary 20 with opened purge
valve through the pump head until there are no more bubbles in the
solvent entering the syringe. The pump can then again be purged
briefly by pressing the key 9.
On completion of this procedure, the purge valve 24 is closed by turn-
ing clockwise. The pump is now ready for operation.