EN1H-1374GE23 R1014 - Translation of original
9
Honeywell GmbH
GB
3.5 Mode of operation
3.5.1 Mode of automatic operation
The system is switched on and off by a pressure regulated electro-mecha-
nical control unit. If the preset pressure p
E
is not reached, the pump is acti-
vated via the pressure switch. If water consumption decreases, the pump
shuts off after a preset follow-up time (up to 10 minutes).
The system can be controlled by remote on/off independently of the pres-
sure switch (for example by switches in wall hydrants for fire extinguisher
systems). Pressure switch and remote on/off inputs are monitored for wire
breakage and short circuits. If wire breakage or a short circuit is detected,
the system is automatically turned on and the yellow indicator light signals a
malfunction.
The required amount of water is fed into the system via the inlet valve. For
this purpose, the float valve on the potable water inlet opens and closes fully
automatically.
3.5.2 Mode of manual operation
Manual operation is also possible in addition to automatic mode as an
exception.
A manual/automatic switch for the pump is on the switch cabinet. In the posi-
tion
Manual
the pump is connected to the network, independent of the auto-
matic mode (pressure switch or remote on/off).
To keep the pump and the pump medium from overheating during manaul
operation in the case of zero delivery, a minimum amount has to be pumped.
If not, the magnetic valve in the bypass is opened when the pump mantle
reaches a programmable temperature, in order to ensure that a minimum
amount of medium is pumped.
3.5.3 Mode of operation for testing
There is a digital timer in the switch cabinet with which testing is parame-
trised. In testing mode, the pump is connected to the network, independent
of the automatic mode (pressure switch or remote on/off).
3.5.4 Mode of operation for protection against dry running
Protection against dry running is active in the manual and testing modes, as
long as the pressure does not fall below the switch-on pressure p
E
or the
system is actuated by remote on/off, because the situation is interpreted as
a case of fire that has to be extinguished and for which the system safety
equipment has to be disabled. The connection for the dry running protection
is a digital input. If it is open, the control unit registers dry running and shuts
the system off after approx. 10s (default setting).
3.5.5 Mode of operation for temperature monitoring
There is a temperature monitor on the pump mantle that opens the magnetic
valve on in the bypass, if a programmable temperature is registered (default
90 °C) to protect the pump against overheating when operated without a
minimum amount discharge. Temperature monitoring is activated in the
automatic and manual modes.
3.5.6 Mode of operation for refilling
Refilling is done automatically via a float valve. Water shortage and overflow
are indicated as an error by the switch cabinet.
3.5.7 Mode of operation for flushing
Flushing of the potable water pipeline connected upstream can be activated
by setting the digital timer in the switching cabinet via the solenoid valve.
The flushing water is discharged though the integrated overflow. The flus-
hing time is estimated with respect to the required flushing volume (refer to
the following figure). For larger flushing volumes (more than 200 l), it can be
increased by 7 l (25 m
3
/h) and 14 l (50 m
3
/h) with each further second.
Figure 5:
Determining the flushing time
3.5.8 Mode of operation for separation of potable water
The Compact Booster Unit can be supplied with water exclusively by
sending a potential free message "potable water separation" to close the
supply of potable water to other consumers at a branch upstream from the
system. The message is sent with a time delay (default 30 s) when actuated
by pressure switch of remote on/off.
3.5.9 Mode of operation in the event of power loss
In the event that the mains power supply of the entire system fails standby is
no longer functional.
4. Options
In automatic mode, all system safety equipment (dry running protection,
motor protection) are disabled because pumping has the priority during
a fire. The motor is still monitored, but once the motor protection switch
has been activated, the motor remains unmonitored in the network and
an error message is displayed.
Manual operation is only for emergency!
Continuous operation of the system in manual mode can lead to exces-
sive water and energy consumption due to the bypass line.
Pump
Minimum amount discharged per pump for manual
operation [l/h]
Movitec 15
2400
Movitec 25
2800
Movitec 40
4000
Refilling has to be done with 25 m
3
/h (for design flow
18 m
3
/h) and with 50 m
3
/h (for design flow 36 m
3
/h and
48 m
3
/h) and system pressures of 1.5 bar (at 18 m
3
/h), 3.0 bar (at
36 m
3
/h) and 4.0 bar ( at 48 m
3
/h) and a maximum of 8 bar.
The flow rate has to be set by a throttle valve on the system. If refilling
works properly, the tank is filled up to just below the overflow hole in the
middle after the refilling valve is closed. The overflow with integrated si-
phon trap is designed corresponding to the refilling. The system opera-
tor is responsible for ensuring the drain outlet lines are sufficiently
dimensioned.
According to DIN 1988-600, the maximum flow rate in a single inlet line
to the extinguishing water transfer point may not exceed a calculated
flow rate of 5 m/s.
CBU144-50A-...
refer to technical data for type selection
CBU144-65A-...
refer to technical data for type selection
CBU144-80B-...
refer to technical data for type selection
0
8
9
10
11
12
13
14
15
16
17
18
19
20
Rinsing time [s]
50 m
3
25 m
3
Rinsing volume [l]
20
40
60
80
100
120
140
160
180
200
220
