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2.
Isolate the power and disconnect the electrical supply plug from the electrical
supply connector, 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 filters, silencers and knock out pots (if installed) and then
fit 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 location where maintenance will be carried
out.
After maintenance is complete, re-install the dry pumping system as described in
Installation
7.4 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 (Refer to
yet.
3.
Connect a drain hose to the cooling water return connection (Refer to
page 12). Position the open end of the drain hose in a suitable collection container.
4.
Turn on the clean dry air supply.
5.
Monitor the drain hose outlet until 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 materials 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
A41870880_A
A41870880_A - Maintenance
on page 27.
Checking the oil levels and refilling
Page 58
on page 57.
Rear view
on page 12). Do not turn on the air supply
Relocate the dry
Rear view
on page 59.
07/2021 - ©Edwards Limited
on
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