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Maintenance
M518-00-880 Issue A
5Maintenance
Maintenance details of the CXS pump system and EH booster are specified in the individual manuals M52800880 and
A30115880 respectively.
The following instruments fitted to the EH booster pump are part of the CXS safety circuit, and must be proof tested
in accordance with the instructions and intervals given in M52800880.
Water flow switch - Mandatory for Category 1/2 and Category 2/2
Exhaust pressure transmitter - Mandatory for Category 1/2 only
N2 coupling purge switch - Mandatory for Category 1/2 only
Motor thermistors - Mandatory on all Categories
5.1 Draining the cooling-water
1. Connect a regulated clean dry air supply (5 barg or 73 psig) to the cooling-water supply connection (Figure 1,
item 11). Do not turn on the air supply yet.
2. Connect a drain hose to the cooling-water return connection (Figure 1, item 9). Position the open end of the
drain hose in a suitable collection container.
3. Turn on the clean dry air supply.
4. Monitor the drain hose outlet until no further cooling-water is purged.
5. Ensure that the EMS terminals are linked out, or connected to your EMS system as described in Section 3.8 of
M52800880. If you do not, you will not be able to purge the water system effectively.
6. Power up the system, then press the reset button on the display module until the light goes out (refer to
M52800880 if in doubt). 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 system and repeat the entire process. Continue repeating until no further cooling-water is
purged from the system.
7. 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.
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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