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- Xylem Hydroquench 3000 MK2
Lowara’s Hydroquench packaged fire system is setting the standard in fire prevention and fighting in residential developments across the UK. The automatic sprinkler sets provide a pressurised system in and residential installations, using the latest technologies to ensure the highest degree of reliability.
Designed to comply with the draft specification EN 12259-12 & BS 9251
Specifications
- Standard flow range: 0 - 400 l/m
- Standard pressure range: 1 – 6 Bar
- Higher flow rates available on request.
Main Features
- Water supply and waste water applications
- Fully pressurised system giving instant reaction to sprinkler operation.
- Automatic self test cycle with true indication of pump condition.
- Selectable test cycle frequency
- Fully packaged units which enable quick cost effective installation.
- Volt free alarm contact to give external warning of pump set started/fault.
- Volt free alarm contact for evacuation alarm.
- Monitors both pressure and flow to prevent premature manual shutdown.
- Integral 8L vessel to accommodate expansion and maintain pressure against small leaks.
- LED status indication.
- Manual test facility.
Sprinkler systems
Most people will be aware of the sad fact that many lives have been
lost to fire in unprotected buildings, but a lesser known fact is that no
deaths by fire have been reported to date where the building was
fully protected by fire sprinklers.
Description
Hydroquench automatic sprinkler sets incorporate the latest
technologies to ensure the highest degree of reliability.
A large range of pump types are available enabling a perfect match
for each individual system primarily covering Domestic and
Residential applications.
Each month the sprinkler set will carry out a pump performance test
to ensure the pump remains in perfect working order and ready for
operation. The frequency of test is adjustable and can be increased if
required.
Pump set on demand
When the on demand lamp is illuminated it signals that the fire set
has been called into action and is now on demand, under this
condition it is not possible to stop the set by pressing the stop
button. Once the fire has been extinguished the discharge isolation
valve can be closed which will cause the on demand lamp to be
extinguished after which the stop button can be pressed and the
set will stop.
General alarm contact
When the pump set starts, an audible alarm will sound at the set, a
failsafe general alarm volt free contact will operate to indicate to a
remote monitoring device (not supplied) that the pump set has
started or a fault has occurred.
Flow alarm contact
The flow alarm volt free contact will only operate if flow is taking
place indicating a real usage on the system.
This alarm contact can be used to trigger the evacuation alarm.
Pump test
The pump set will automatically operate a self test cycle at pre-set
intervals, which can be adjusted between 4 and 28 days. This test
can also be carried out manually at any time by operating the test
button.
When being tested, manually or automatically, the pump runs for
approximately 5 seconds. The pump will be monitored to ensure that
it can achieve the design set point pressure. If the test is successful
then no alarm will be sounded. If the pump fails then the audible
alarm will sound and the general alarm volt free contact will operate.
Re-pressurisation mode
In this mode the control circuit will look at both pressure
and flow, if pressure has fallen without flow taking place
then the control logic will start a pump to re-pressurise
the system without sounding the evacuation alarm.
The pump will automatically stop and revert to standby
mode when the system pressure is back to normal.
The general alarm contact will operate whilst the Pump
is running.
Recirculation line
The set is fitted with facilities to re-circulate Water back to
the break tank or to drain to prevent overheating which
could occur if the set was left to run under closed valve
conditions.
Operation
The pump set is designed to maintain pressure to various
sprinkler heads, if a sprinkler head is activated the pres-
sure in the system will start to fall, a pressure switch within
the system will monitor this fall in pressure and start the
pump set. The pump will deliver the required pressure
and flow to satisfy the system demand.
When a sprinkler head is activated and the pump set has
started a flow switch within the system will monitor flow
through the system.
The pump set will now continuously run until pressure
has been restored to the duty stop point and the flow
switch has registered that no flow is taking place. When
both criteria have been met the stop button will become
operative. Under these
conditions the stop button can be
operated to stop the pump set.
