Draining The Cooling Water; General Maintenance - Edwards GXS Series Instruction 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 location where maintenance will be carried
out.
After maintenance is complete, re-install the dry pumping system as described in
Installation

5.3 Draining the cooling water

WARNING:
Use of suitable protective gloves and eye protection is recommended when carrying
out this procedure. Personal protective equipments should be checked and used as
specified by its supplier.
1. Relocate the dry pumping system for maintenance as stated in
pumping system for maintenance
2. Connect a regulated clean dry air supply (5 barg or 73 psig) to the cooling water
supply connection
(system with rear exhaust and castors/levelling feet
the air supply yet.
3. Connect a drain hose to the cooling water return connection
connectors on the rear of the pump (system with rear exhaust and castors/levelling
feet
collection container.
4. Turn on the clean dry air supply.
5. Monitor the drain hose outlet until no further cooling water is purged.
6. Fit the external EMS link plug (supplied) to the EMS connection on the rear of the
dry pumping system
(system with rear exhaust and castors/levelling feet
so will result in not being able to purge the water system effectively.
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 flow paths. After two minutes, remove the electrical supply. Wait for 10
seconds and then re‑connect the electrical supply and repeat the entire process.
Continue repeating until 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.
M58800880_H - Maintenance
on page 28.
(Figure: The controls/connectors on the rear of the pump
fitted), item 17). Position the open end of the drain hose in a suitable
(Figure: The controls/connectors on the rear of the pump
on page 69.
Page 70
Relocate the dry
fitted, item 14). Do not turn on
(Figure: The controls/
fitted, item 22). Failure to do