Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual page 191

Inlet valve (bottom part) with
opening on the front left
Loading pump
Tighten the inlet check valve hand-tight and turn the bottom part so that the inlet opening
points toward the back. Then, use an open-end wrench (size 13 mm) to tighten the nut
until the inlet opening is on the left (about one-quarter turn; → Fig. 91, page 226).
9. Reconnect the tubing connections to the inlet and outlet check valve. Observe the
following:
Inlet check valve
When you attach the solvent supply line to the inlet valve, take care to avoid cross-
threading. If the valve leaks, you may tighten the fitting a little more.
Outlet check valve
Tighten the Viper fitting connection. Observe the information about the different fitting
connections on page 57.
10. To prevent contaminants from entering the HPLC system, thoroughly rinse the pump
(→ page 72).
11. Loading pump only
Test the pump for leakage (→ page 211). Tighten leaking connections.
NC pump only
Visually check the NC pump for leakage while pressure builds up. If leakage occurs for
the NC pump, the message 'Cannot regulate flow' will appear on the pump display
(→ page 149).
12. Update the service information in Chromeleon (→ page 132).
Operating Instructions
Fig. 64: Inlet check valve NC pump
UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Inlet valve (nut)
Page 183