138 Agilent 1290 Infinity Binary Pump User Manual
9 Maintenance
Replacing the Pump Heads
5
Remove the complete pump head assembly by holding it
with both hands and pulling it to the front.
Do not further disassemble the pump head.
6
Install the pump head assembly by fixing the 4 screws
using a 4 mm hex key and a torque wrench set to 5 Nm.
Install screws step by step, not screw by screw.
7 Install flow connections.
• Connect the degassing unit outlet to the inlet of the
primary pump head and the outlet of the secondary
pump head to the inlet of the purge valve.
•
Channel A (left pump head assembly) is connected to
port 4, channel B (right pump head assembly) to port 1.
8 After the complete reassembly of the module, the pump
must be purged. For 10 min, apply a flow of 10 ml/min
using solvents suitable for your application and a
composition 50:50 for channels A and B, for example
50 % acetonitrile, 50 % water.
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