4.1.2 Equipment used in fresh water systems is to be provided with local control and
monitoring arrangements.
4.1.3 Where isolation of equipment or systems can be carried out, manual or automatic means
of indicating the status of isolation is to be provided at all positions where the
equipment and system can be operated and monitored.
4.1.4 Instrumentation to indicate the operational status of running equipment and of any
standby equipment is to be provided locally and at each control station.
4.1.5 All pumps are to be provided with an indication of discharge pressure and a low
discharge pressure alarm at each control station from which the pumps can be
operated.
4.1.6 Sea water desalination plant instrumentation is to include, as a minimum, salinity
indication and a high salinity alarm of the desalinated water at the plant and at
each control station.
4.1.7 Arrangements are to be made to automatically divert any water that is above the
specified salinity limit from distribution into the on-specification fresh water
storage system.
4.1.8 Sea water desalination plants using reverse osmosis are to be provided with automatic
means of sterilising the desalinated water downstream of the plant.
4.1.9 Calorifiers are to be provided with a means of indicating and controlling the outlet
temperature of fresh water to distribution systems. Low and high temperature alarms
are to be provided in the hot water distribution system at each control station.