Monitoring Functions
Leakage:
Systems BB1, BB2, and BB3 permit the continuous discharge of a preset amount
of water in one, two or three individual measurement channels. If this amount
is exceeded in a single discharge, a Max Alarm is issued for the relevant
channel, and the water supply is optionally cut off.
Seepage:
Systems BB1, BB2, and BB3 check 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 for the relevant channel and optionally cut off the water supply
if this fails to occur daily.
System Error:
Systems BB1, BB2, and BB3 check that attached flow meters issue impulses regularly,
unless the Holiday function is active.
Whenever a valve is closed, the system checks its tightness.
If a component fails, a System Error is issued, and the water supply is optionally
cut off for the channel in question.
Supply Error:
Systems BB1, BB2, and BB3 monitor the mains supply and all internal supplies.
If either of these fail, a Supply Error is issued. This may not
cause a cutoff of the water supply.
Alarm Functions
On leakage and system errors, Systems BB1, BB2, and BB3 will cut off the
water supply, issue visual and audible alarms, and activate the alarm relay.
Supply errors are reported via the alarm relay, and possibly also
visibly and audibly.
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External Control Inputs
The BB1, BB2, and BB3 systems feature two external control inputs, one of which
forces the system into 'Free Discharge' mode, or alternatively provides a full
system inhibit, while the other either puts the system into Holiday mode or
closes a cut-off valve. The former may be used to allow a gardener or an irrigation
system to use a large amount of water, while the latter may be used to let an
alarm system switch to high sensitivity mode, or cut off water supply entirely
when the house is left empty.
Specifications
Controls and Indicators:
Mains, Flow, Valve and State indicators, buzzer.
Buttons for manual valve control, temporary free discharge select,
holiday function select and alarm acknowledge.
Leakage Monitor (per channel):
Alarm limit jumper selectable 250, 500, 1000, or 2000 litres.
Other values available upon request.
Discharge flow limit is typically pre-set at 0.6% Qn.
In holiday mode, alarm limit is typically pre-set at
20 litres irrespective of jumper setting.
Free discharge maximum duration selectable one to eight hours.
Seepage Monitor (per channel):
Seepage tolerance 2, 4, or 8 litres registered in 30 or 60 minutes.
Observation interval 24 hours.
Mains Connection
230/240V 50Hz L/N/PE via external key switch.
Consumption max 20VA.
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