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3.4 Secondary Filter Service
Remove retaining
screws & withdraw
filter from side of
unit for cleaning
Fig.24 – Servicing Secondary Filter
NOTICE! The unit will need to be stopped before cleaning the filter and either partially
of fully withdrawn from the rack
The Secondary filter may be removed & cleaned following the procedure below: -
-
Stop the unit, isolate the unit from external secondary circuit (with isolation valves or quick
release couplings), then drain the secondary circuit at the Schrader valve drain point located
on the rear panel of the unit (Note: once the pressure is released, this will be easier if the vent
point is also opened – see diagram above).
-
Pull the unit forward from the rack far enough to gain access the filter on the right-hand side
of the unit. Note: this will require sufficient flexibility in the Primary & Secondary hoses
connected to the rear of the unit. If this is not possible, then the hose connections (valves or
QC's) will need to be isolated & disconnected first.
-
Once the water has been drained from the Secondary circuit, the filter can be removed from
the filter housing, by removing the 6 x countersunk hd. retaining screws.
-
The filter screen may now be washed under a running tap from inside to outside. If available,
a high-pressure water jet is preferable for more effective cleaning, although care should be
taken not to damage the filter mesh.
Replacement is the reverse of above procedure. Ensure the water make-up container is full, with
additional treated water available. Re-filling will be as described in the Installation & Commissioning
manual, by initiating a Fill Pump Request from the Service menu. Keep the manual air vent open when
filling to allow air in the filter/reservoir tank to be purged out.
The fill pump will automatically stop when the reservoir tank is full and system is back to normal
operating pressure.
3.5 Spare Parts
Contact supplier spare parts requirements.
Part No.
SP00001-21
SP00006-02
SP00007-01
SP00008-01
SP00009-02
CDU Operating & Maintenance Guide
Neptune DWC RM100 in-rack Coolant Distribution Unit
Description
Main Pump Assembly 48v DC
Control Valve Actuator
Controller Board Assembly
Controller Touchscreen Display
Fill Pump
38
Page
Secondary Circuit
Vent Point
Secondary Circuit
Drain Point
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