4 Description
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Hya-Duo D FL Compact
4.6 Configuration and function
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2
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5
Fig. 4:
Illustration of the break tank package booster set for fire fighting
1 Control cabinet
4 Tank
2 High-pressure centrifugal pump
5 Baseplate
3 Inlet
Design
Fully automatic, ready-to-connect break tank package booster set for fire fighting
comprising two high-pressure centrifugal pumps (2) with redundant function, a
control cabinet (1) and a tank (4) for the hygienic separation of drinking water and
fire-fighting water. The modular design allows separating the break tank package
booster set for fire fighting into three modules (control cabinet with hydraulic unit,
tank and baseplate). Anti-vibration mounts are fitted at the pump feet and baseplate
(5).
Function
The pump sets are started and stopped as a function of pressure via the electro-
mechanical control system. If the pressure drops below the set start-up pressure p
E
,
the pump sets are started up via the pressure switch. When consumption decreases
again, the pump sets are stopped as a function of pressure after the set after-run
period (up to 10 minutes). Independently of the pressure switch, the break tank
package booster set for fire fighting can also be controlled via remote ON/OFF (e.g. a
switch in the wall hydrant). The pressure switch and remote ON/OFF input are
monitored for broken wires and short circuit. If a broken wire or short circuit are
detected, the break tank package booster set for fire fighting is started up
automatically and a fault is indicated.
In the event of a fire, pumping the fluid handled is of top priority. In automatic
mode, the protective features (dry running protection, motor protection) cannot be
enabled. If the motor protection switch trips, the motor will keep running on the
power supply network without further monitoring. A fault message is output.
The required quantity of the fluid handled is supplied via the float valve.
The float valve at the drinking water inlet is opened and closed fully automatically as
a function of the fill level in the tank. A float switch monitors for lack-of-water and
overflow, and signals such events to the control system. Power supply of the flushing
system and water level monitoring equipment is effected via terminals in the control
cabinet.