Boss AX1-2.5E, Operation & Maintenance Manual

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Maintenance
Due to variations in operating conditions, and the varying loads placed on pressurisation units, it is
not feasible to provide accurate predictions of component lifespan. The most effective method of
maintenance is to inspect the pressurisation unit for early signs of component failure and take action
accordingly.
The following maintenance procedures should be performed at least once a year:
Visual Inspection
A basic visual inspection will highlight the majority of potential faults on a pressurisation unit. It is
recommended to perform a visual inspection annually. However, due to the simplicity of performing
these checks, frequent inspections are encouraged.
Check the digital display for fault codes
Check for signs of leakage (e.g. water, mineral deposits, corroded components/cabinet)
Check the break tank overflow for signs of water discharge
Check flexible hoses for signs of degradation (e.g. cracks)
Check that the pressure reading on the digital display corresponds to the actual system
pressure (read off another gauge)
Interrogate Controller
The digital controller keeps a log of the number of pump starts and total hours run for each pump, as
well as the number of alarm activations and power interruptions. It is advisable to take a note of
these figures when servicing the unit, as they may be helpful in diagnosing potential issues. Fields are
provided in the service log for these figures.
It is advisable to scroll through all the settings (including engineers setting) and check them against
the figures on the commissioning report. If there are any discrepancies, check first with on-site staff
to see if the changes are deliberate. If not, reconfigure appropriately.
If settings are persistently becoming corrupted, a power filter may be required. Please
refer to the Installation section of this manual for more information.
Test Unit Operation
The best way to test the operation of the pressurisation unit is to drain water from the system,
allowing the pressure to drop slowly. Once the pressure falls below the pump cut-in pressure ([COLD
FILL] – [DIFFERENTIAL]) the pump should start. As soon as the pump starts, close the drain point and
allow the system pressure to rise. Once the [COLD FILL] pressure is reached, the pump should stop.
If the unit is a twin pump model, this test should be repeated until both pumps have run and
successfully re-pressurised the system.