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Maintenance
M588-00-880 Issue E
Drain the cooling water from the dry pumping system if transporting or storing it in conditions where the cooling
water could freeze. Failure to do so could result in the cooling water freezing in the dry pumping system and
damage occurring to the pump(s) and/or the cooling water pipelines.
To remove the dry pumping system from its operating location and move it to another location to carry out
maintenance, use the following procedure:
1. Purge the dry pumping system and shut down as described in Section 4 and allow the dry pumping system to cool
down.
2. Isolate the power and then disconnect the mating half 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 and then fit 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 Section 3.
5.3 Draining the cooling water
1. Relocate the dry pumping system for maintenance as stated in Section 5.2.
2. Connect a regulated clean dry air supply (5 barg or 73 psig) to the cooling water supply connection (Figure 3,
item 14). Do not turn on the air supply yet.
3. Connect a drain hose to the cooling water return connection (Figure 3, item 17). 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. Fit the external EMS link plug (supplied) to the EMS connection on the rear of the dry pumping system (Figure 3,
item 22). Failure to do 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.
Use of suitable protective gloves and eye protection is recommended when carrying out this
procedure. Personal protective equipment should be checked and used as specified by its supplier.
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