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3.4 Function
The system comprises two multi-speed high-pressure rotary pumps with
inlet and outlet shut-off valves. They can be locked with padlocks against
unauthorised closing. They make it possible to disassemble the pumps or
the check valves without having to empty the pipeline system. The check
valve on the pumping side prevents liquid from backing up on the pump and
flowing backwards through it, and it relieves the floating ring seal.
The fully automatic Compact Booster Unit with compact design comprising:
• vertical high-pressure pumps
• electro-mechanical control unit to ensure the required supply pressure is
provided for the consumers
• buffer tank with automatic refilling
construction and operation is according to DIN 1988, DIN 14462, EN 1717
and EN 13077.
3
8
Figure 1:
CBU145 Structure
1
Inlet
3
Display
5
Pump
7
Temperature monitor
9
Bypass
3.4.1 Installation type
• Fixed installation
3.4.2 Inlet side
On the inlet side there is a buffer tank with a float valve to refill water. Addi-
tionally the Compact Booster Unit has a solenoid valve for hygienic flushing
of the inlet pipe. In the buffer tank there are two float switches with which the
water level is measured and in the case of water shortage and overflow
messages are sent.
1
3
4
Figure 2:
CBU145 Inlet side
Honeywell GmbH
2
1
4
6
5
7
2
Buffer tank
4
Switch cabinet
6
Base frame
8
Outlet shut-off valve
1
Buffer tank
2
Float switch
3
Overflow
4
Siphon trap
EN
3.4.3 Outlet side
On the outlet side there is a diaphragm expansion vessel as well as two
pressure switches and a pressure guage.
1
Figure 3:
CBU145 Outlet side
3.4.4 Switch cabinet
The switch cabinet is connected to the pump base frame and completely
wired with the Compact Booster Unit. Power supply for water level measure-
ment and solenoid valve is made possible via a plug connection to the
switch cabinet.
3.4.4.1 Automation
• Electro-mechanical control unit
• Timer for 24 hour functional operation and weekly flushing cycle
• Manual/automatic switch
• Phase monitor relays with rotation monitoring and phase failure protection
• Protection against dry running and Motor protection switching, only as a
message during automatic operating mode
• Terminal strip/clamps with labels for all connections
• Easy starter
• Remote on/off, protected against wire breakage and short circuit
3.4.4.2 Messages given out by indicator lights
• Red: Water shortage
• Yellow: Malfunction
• Green: Normal operation
• White: Operation triggered by remote on/off
3
2
1
4
Automatik /
Handbetrieb /
Automatic
Manual
Figure 4:
CBU145 Indicator lights
1
Water shortage
3
normal operation
3.4.4.3 Messages sent via potential-free terminal clamps to, for
example, the central building control system
• Water shortage
• Switch to position manual/automatic
• Buffer tank overflow
• Remote actuation via remote on/off
• Collective error message
• Separation of potable water
8
Translation of original - EN1H-1375GE23 R1014
1
Diaphragm expansion vessel
2
Pressure switch
3
Pressure guage
Störung /
Wassermangel /
Anlage bereit /
Fault
Lack of water
System ready
2
Malfunction
4
Operation triggered by remote
on/off
Anforderung /
Remote
operation
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