© Edwards Limited 2008. All rights reserved.
Page 5
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Installation
A505-23-880 Issue D
7. Cut a suitable length from the flexible oil-return tube. The routing of the tube (3) must be approximately as
shown in Figure 1. When fitted, the tube must not be taut and there must be no tight bends in the tube. Ensure
that the ends of the oil-return tube are free of burrs and that they are squarely cut(that is, the cut faces are at
a right-angle to the length of the tube).
8. Fit the restrictor (7) into one end of the tube as shown in Figure 1, then fit the end of the tube (3) to the drain
adaptor (8) on the oil mist filter.
9. Fit the other end of the tube to the nozzle (4) on the oil return assembly (5).
10. Use the hose clips (2) to secure the ends of the flexible oil return tube (3).
11. Reconnect the pump to the electrical supply.
2.3
Select the gas ballast flow rate (optional)
Note:
If re quired, use the pro cedure be low to change the gas bal last flow rate af ter you have used the Oil
Drain Kit; you must switch off the pump, al low it to cool and iso late it from the elec trical sup ply be fore
you use the fol lowing pro cedure.
The Oil Drain Kit is supplied configured so that the gas ballast flow rate is equivalent to that with the gas ballast
control on the pump in position ‘II’. If required, you can adjust the gas ballast flow rate; use the following procedure:
1. Refer to Figure 2. Undo and remove the three screws (1) which secure the restrictor plate (5); do not dismantle
the assembly.
2. The restrictor plate (5) has circular indentations (2 and 3); the position of these indentations with respect to the
indentation (4) on the oil return assembly identifies the gas ballast flow setting. Turn the restrictor plate to the
required position:
To select no gas ballast flow (equivalent to the gas ballast control on the pump in position ‘0’), turn the
restrictor plate so that none of the indentations (2 and 3) are aligned with the indentation (4) on the oil
return assembly.
To select low gas ballast flow (equivalent to the gas ballast control on the pump in position ‘I’), turn the
restrictor plate so that the single indentation (2) is aligned with the indentation (4) on the oil return
assembly.