Pump Head And Pistons - Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS

7.6.2 Pump Head and Pistons

7.6.2.1 Removing the Pump Head and Pistons
1. Tilt the front cover upward.
2. If necessary, purge the pump to remove harmful solvents.
3. Set the pump flow rate to 0. Open the purge valve and wait until the system pressure is
down to zero.
4. Move the pistons into the appropriate position for piston replacement. To do so,
perform the command for the pump head that you want to remove.
♦ On the pump, perform the Change Right Pump Pistons or Change Left Pump
Pistons command on the Control menu for the NC pump or the Change Pump
Pistons command for the loading pump (→ page 101 ).
Wait until the Pump/Maintenance screen indicates that the pump head can be
removed, before you continue with the next steps.
—or—
♦ In Chromeleon, open the Commands dialog box for the NC pump or the loading
pump and perform the UndockPistons command. (For the NC pump, the command
appears under NC_Pump_Wellness_LeftBlock and
NC_Pump_WellnessRightBlock; for the loading pump, the command appears
under LoadingPump_Wellness_RightBlock.)
Wait until the PistonPositionStatus property reports Undocked before you continue
with the next steps.
5. NC pump only
Move the pistons of the second pump head into the appropriate position for removal if
applicable (Undock).
6. NC pump only
Unplug the pressure transducer cable from the P-Work connector on the interior front
panel.
7. Disconnect all fluid connections from the pump head. (It is not necessary to remove
the U-tube, that is, the capillary from the working cylinder to the equilibration.)
Observe the information about connecting capillaries and about the different fitting
connections on page 57.
8. Loosen the pump head screw with the hexagon wrench (size 6 mm) from the
accessories kit of the module.
Page 188 Operating Instructions