CAUTION: PARTS ALIGNMENT
Risk of pump damage. Check that the alignment dowel in the housing assembly lines
up with the hole in the fixed scroll. Make sure that the fixed scroll is fitted squarely
onto the housing assembly.
The fan-cowl/fixed scroll assembly must be installed evenly while tightening each
screw, do not start by assembling one side first.
3.5 Refit the fan cowl
1. Install the new O-ring onto the fixed scroll. The O-ring may be moistened with
water (H
2
O) only, to aid assembly. Refer to Figure: Replacing the tip seals.
2. Position the pump on its end and carefully offer the fan cowl/fixed scroll assembly
up to the housing assembly. Connect up the motor fan connector into the
controller mating connector. Refer to Figure: Motor fan lead connector.
3. Assemble the fan-cowl/fixed scroll assembly onto the housing assembly by hand
using even downward pressure.
4. Tighten the fastening screws in small increments and pull-up evenly the fan-cowl/
fixed scroll assembly onto the housing assembly. Torque each screw to 9 Nm. Refer
to Figure: Replacing the tip seals.
Note:
Make sure that you do not to damage or trap the O-ring.
5. Rotate the pump by hand using a 4 mm Allen key.
6. Reinstall your pump in accordance refer to Installation chapter of the nXDS Scroll
Pump manual A735018xx.
7. When you operate the pump follow the tip seal change, make sure the fan is
operating correctly.
Note:
The pump tip seals may take a few hours to bed-in before full performance is
restored.
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