Monitoring Functions
Leakage:
System LMI-B permits the continuous discharge of a preset amount
of water. If this amount is surpassed in a single discharge,
a Max Alarm is issued, and the water supply is cut off. ¹)
Seepage:
System LMI-B checks that water flow in the installation can drop
and remain below a preset level for a preset time duration,
and will issue a seepage alarm and cut off the water supply ¹)
if this fails to occur daily.
System Error:
System LMI-B checks that the flow meter issues impulses regularly,
unless the Holiday function is active.
Whenever the valve is closed - manually or by alarm -
system LMI-B checks its tightness. ¹)
If a component fails, a System Error is issued. The water supply is
cut off for meter errors. ¹)
Supply Error:
System LMI-B monitors the mains supply and all internal supplies.
If either of these fail, a Supply Error is issued. This may not cause a cut-off
of the water supply.
Alarm Functions
On leakage and meter errors, system LMI-B will cut off the water supply ¹),
issue visual and audible alarms, and activate the alarm relay.
Supply errors are reported via the alarm relay, and possible also visibly and audibly.
Valve error are reported visibly.
Variants:
Type LMI-B-V0 is used where firefighting hoses or sprinklers are part of the monitored
supply water installation. This type must always be connected to an alarm- or dialout system.
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Specifications
Controls and Indicators:
Operation, alarm and state indicators, buzzer.
Buttons for temporary free discharge selector,
holiday function and alarm acknowledge.
Leakage Monitor:
Permissible single discharge selectable 125, 250, 500 eller 1000 litres.
Flow minimum to terminate discharge 15 l/h.
In holiday mode, permissible single discharge is 20 litres regardless of setting.
Free discharge of preset duration 1-8 hours.
Seepage Monitor:
Seepage tolerance 2, 4 or 8 litres in 30, 60 or 120 minutes.
Observation interval 24 hours.
Mains Connection
230V 50Hz L/N/PE via external key switch.
Power consumption max 20VA.
Options
Liquid Sensor Attachment:
System LMI-B accomodates via interface ILS-C
up to two liquid sensors LS-X, whereby the system
offers point protection of a particularly sensitive area so that the water supply may be cut off on
Liquid Sensor alarm if desired. ¹)
SMS-alarm:
By attachment of an external SMS-alarm to the alarm relay output,
system LMI-B can ship a text message to a selected mobile phone number.
Installation diagram system LMI-B
1: Control Unit
2: Flow Meter
3: Cutoff Valve ¹)
¹) not applicable to type LMI-B-V0
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