Edwards GXS Series User Manual

6. For dry pumping systems with castors, adjust the levelling feet so that the dry
pumping system rests on the castors.
7. Move the dry pumping system to the locaon where maintenance will be carried
out.
Aer maintenance is complete, re-install the dry pumping system as described in
Installaon on page 28.
5.3 Draining the cooling water
WARNING:
Use of suitable protecve gloves and eye protecon is recommended when carrying
out this procedure. Personal protecve equipments should be checked and used as
specied by its supplier.
1.
Relocate the dry pumping system for maintenance as stated in Relocate the dry
pumping system for maintenance on page 69.
2.
Connect a regulated clean dry air supply (5 barg or 73 psig) to the cooling water
supply connecon (Figure: The controls/connectors on the rear of the pump
(system with rear exhaust and castors/levelling feet ed, item 14). Do not turn on
the air supply yet.
3. Connect a drain hose to the cooling water return connecon (Figure: The controls/
connectors on the rear of the pump (system with rear exhaust and castors/levelling
feet ed), item 17). Posion the open end of the drain hose in a suitable
collecon container.
4. Turn on the clean dry air supply.
5. Monitor the drain hose outlet unl no further cooling water is purged.
6. Fit the external EMS link plug (supplied) to the EMS connecon on the rear of the
dry pumping system (Figure: The controls/connectors on the rear of the pump
(system with rear exhaust and castors/levelling feet ed, item 22). Failure to do
so will result in not being able to purge the water system eecvely.
7. Connect the dry pumping system to a suitable mains electrical supply. The control
system will now open each temperature control valve, purging the cooling water
from all ow paths. Aer two minutes, remove the electrical supply. Wait for 10
seconds and then re‑connect the electrical supply and repeat the enre process.
Connue repeang unl no further cooling water is purged from the dry pumping
system.
8.
The cooling water drain procedure is now complete. Disconnect the air supply,
electrical supply and the drain hoses. Dispose of the drained cooling water
appropriately.
5.4 General maintenance
CAUTION:
Do not use cleaning materials based on strong alkalis, aggressive or chlorinated
solvents. Do not use cleaning materials containing abrasives.
Page 70
M58800880_H - Maintenance

Edwards GXS Series Specifications

General

Brand	Edwards
Model	GXS Series
Category	Water Pump
Language	English