Weight; Materials; Sensors; Installation - Grundfos AR Installation And Operating Instructions, Supplement

3.7 Weight

Weight of AR control unit: 0.5 kg.

3.8 Materials

AR control unit enclosure
• Upper part of enclosure: PPO blend
• Lower part of enclosure: aluminium.

3.9 Sensors

Stroke control
Dosing pumps operated via a AR control unit must be provided
with a Hall sensor.
Without Hall sensor the linear deviation will
deteriorate to more than 10 %!
Caution
With Hall sensor, the linear deviation will be less than
2 %.
Length of Hall sensor cable for all pump types (depending on
mounting variant): 0.4 m or 5 m.
If there is a large distance between the dosing pump
and an AR control unit mounted on the wall, the Hall
Note
sensor cable can be extended up to 20 metres (cable
cross-section: 0.25 mm
For DMX 226 and DMH dosing pumps, a stroke sensor must be
installed in the bearing cover.
• Dosing controller: DMX 221.
• Diaphragm leakage sensor: DMX 221 and DMX 226.
If there is a large distance between the dosing pump
and an AR control unit mounted on the wall, the
extension cables for the dosing controller and the
diaphragm leakage sensor have to be ordered
Note
separately!
Product number 96609032 (321-223)
5-core cable with coupler socket/plug.

4. Installation

4.1 General information on installation

Warning
Observe the specifications for the range of
applications and installation location described in
sections
2. General information
location.
Carefully tighten the screws. Otherwise the plastic
housing may be damaged.
The function of the finally mounted control unit must
Caution
be tested together with the dosing pump!
The nameplate must be stuck to the mounting plate
or to the upper part of the control unit!
2
).
and
4.2 Installation

4.2 Installation location

4.2.1 Space required for operation and maintenance
The pump must be installed in a position where it is
Note easily accessible during operation and maintenance
work.
The control elements must be easily accessible during operation.
4.2.2 Permissible ambient influences
• Permissible ambient temperature: 0 °C to +40 °C.
• Permissible air humidity: max. relative humidity:
70 % at +40 °C, 90 % at +35 °C.
The installation site must be under cover!
Ensure that the enclosure class of motor and pump is
Caution not affected by the atmospheric conditions.
Pumps with AR control unit are only suitable for
indoor use! Do not install outdoors!

5. Electrical connections

Also observe the installation and operating
Note
instructions for the dosing pump.
Make sure that the control unit and pump are suitable for the
electricity supply on which they will be used.
Warning
Electrical connections must only be carried out by
qualified personnel!
Disconnect the power supply before connecting the
power supply cable and the relay contacts!
Before connecting the power supply cable, check
that the rated voltage stated on the pump nameplate
corresponds to the local conditions!
Do not make any changes to the power supply cable
or plug!
Observe the local safety regulations!
Warning
The pump housing must only be opened by
personnel authorised by Grundfos!
Warning
Protect the cable connections and plugs against
corrosion and humidity.
Only remove the protective caps from the sockets
that are being used.
The power supply must be electrically isolated from
Caution
the signal inputs and outputs.
The pump can be automatically started by
Caution
connecting the power supply!

5.1 Switching on/off

• Do not switch on the power supply until you are ready to start
the pump.
Before switching on the pump, check that it is
Caution
installed correctly. See section
The control unit needs a booting time of minimum 5
seconds. Therefore, start the pump by pressing the
"Start/Stop" button. Do not start the pump via the
Note
mains.
In case of mains interruptions or disturbances, the
pump may stop.
4. Installation.
7