Edwards EXS Series User Manual

2. Isolate the power and disconnect the electrical supply plug from the electrical
supply connect
or, then isolate the water and the gas purge supply.
3. Disconnect the purge gas supply, taking care as any trapped gas under pressure is
released. Disconnect the cooling water supply followed by the cooling water
return.
4. Disconnect the inlet and outlet from the vacuum and exhaust systems, remove
bulky accessories such as lters, silencers and knock out pots (if installed) and then
t the blanking caps.
5. If necessary, disconnect any other accessories from the dry pumping system.
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 27.
7.4 Draining the cooling water
WARNING:
Use of suitable pr
otec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 57.
2. Connect a regulated clean dry air supply (5 barg or 73 psig) to the cooling water
supply connecon (Refer to Rear view on page 12). Do not turn on the air supply
yet.
3. Connect a drain hose to the cooling water return connecon (R
efer to Rear view on
page 12). 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. The cooling water drain procedure is now complete. Disconnect the air supply,
electrical supply and drain hoses. Dispose of the drained cooling water
appropriately.
7.5 General maintenance
CAUTION:
Do not use cleaning mat
erials based on strong alkalis, aggressive or chlorinated
solvents. Do not use cleaning materials containing abrasives.
The following maintenance can be carried out on the dry pumping system between the
overhauls. Contact us for the details and training:
▪ Check the oil level. Refer to Checking the oil levels and relling on page 59.
07/2021 - ©Edwards Limited
Page 58A41870880_A
A41870880_A - Maintenance

Edwards EXS Series Specifications

General

Brand	Edwards
Model	EXS Series
Category	Water Pump
Language	English