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3. Characteristics, intended use
DAB circulation pumps of type series
AC 65, AC 80, AC 110
comprise a permanent magnet motor with slotted tube
and an integral frequency converter with constant pressure,
proportional pressure and constant speed control.
The pump is used to deliver liquids in:
– hot water heating installations
– enclosed industrial circulation systems
– Drinking water installations (AW)
3.1 Medium delivered
In heating installations the medium delivered should comply
with the requirements of heating water according to VDI 2035.
Water/glycol mixture permissible with up to 50% glycol.
In drinking water installations the pump must only be used
with water of <25 °fH (14 °dH) degree of hardness.
No combustible or explosive liquids must
be transported.
The liquid must not contain any solid matter,
fibres or mineral oils.
3.2 Operating temperature/operating pressure
Admissible water temperature:
Admissible operating pressure:
Ambient temperature:
1)
for short periods (ca. 30 min)
See section 10 for further details.
4. Installation and assembly
4.1 Flushing out the heating system (with pump removed)
In order to avoid undesirable interruptions in operation
and non-starting of the pump after long periods of standstill,
it is recommended for a newly-installed or converted heating
system that the system be drained, flushed through well
and then refilled again after heating up for the first time.
The system must comply with the latest state of technology.
(Positioning of expansion vessel or initial safety feed.)
4.2 Antifreeze (where necessary)
Important: Rinse the piping especially thoroughly before filling
with the antifreeze mixture. Follow the instructions
of the supplier of the antifreeze concerning mixing, filling,
and the selection of materials in the line and device network
(observe the corrosion protection!)
The water / glycol mixture may contain up to 50% glycol.
Correct the flow data for the pumps accordingly if there
is more than 10% glycol.
4.3 Installation
Only install after all of the welding and soldering has been
done on the system.
Prevent water from dripping on the pump motor,
especially the electronics.
Install the pump housing in the system without current.
+2 °C to +110 °C
1)
max. 10 bar
max. 40 °C
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