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Frequently Asked Questions
What is the system actually being bought for?
Localisation and isolation, not noticing.
An alarm naming a hall helps very little.
One naming a rack and closing a valve helps.
Speed decides whether it becomes an incident.
Nobody should have to be present for step one.
Judge systems on that, not on sensitivity.
Sensing cable or spot sensors?
Length against precision and cost.
Cable detects anywhere along its run.
It can report distance to the leak.
Spot sensors only see liquid that reaches them.
They are cheaper and suit known low points.
Most installations use both together.
Where should sensing actually go?
Where leaks happen, which is at connections.
Couplings, manifold take-offs and valve glands.
Anywhere the loop is broken for service.
Mid-pipe failures are comparatively rare.
Covering pipe runs while missing joints is common.
Walk the loop and list every break point.
What should happen on alarm?
Isolate, signal and localise, in that order.
Valves close without waiting for a person.
The CDU is told so it does not pump into a leak.
The management system receives the location.
Stopping coolant also stops hardware.
That trade must be agreed with IT beforehand.
Who agrees the shutdown sequence?
Facilities and IT together, in advance.
One owns the water, the other owns the load.
Automatic isolation protects the room.
It may also drop a service.
The decision belongs to a policy, not an operator.
Write it down before commissioning.
How are false alarms avoided?
Condensation is the usual cause.
Surfaces below dew point sweat and drip.
That looks identical to a small leak.
Dew point control reduces it at source.
Sensor placement away from cold surfaces helps.
Repeated false alarms get systems disabled.
What is proven at commissioning?
The whole chain, end to end.
Wet the sensor and watch the valve close.
Confirm the alarm reaches the management system.
Check the reported location is correct.
Test each zone, not one sample.
Re-test after any pipework alteration.