23V3.0
DMX model 227
6.2 Principle of function
❏ Oscillating positive displacement pump with electric drive, mechanical
diaphragm deflection, and constant stroke length.
❏ Following reduction of the motor speed by a worm gear, the rotation of the
drive is converted into the suction and compression movement of the
diaphragm by means of an eccentric and tappet. A defined volume (stroke
volume) of the dosed medium is thus sucked into the dosing head via the
suction valve, and displaced into the dosing line by the pressure valve.
❏ The dosing rate can be adjusted in the range 1:10 if a frequency converter
is fitted.
6.3 Switching on / off
6.3.1 Switching on
● Switch on the mains power.
6.3.2 Switching off
● Switch off the mains power.
6.4 Adjustment of dosing rate using frequency converter
❏❏
❏❏
❏ The dosing rate can only be adjusted in the range 1:10 if the frequency
converter is fitted.Diaphragm Dosing Pump
➜
Refer to Operation Manual of the frequency converter!
!
WARNING Observe operating instructions of the manufacturer!
Establish connections as being described there.
Settings in conjunction with GRUNDFOS dosing pumps
Please observe especially the following parameters of the frequency converter:
❏ P013 (maximum motor frequency):
Set to maximum 100 Hz.
Due to this setting, the maximum stroke frequency of the pump cannot be
exceeded.
❏ P086 (motor current limit):
Do not change the default setting (150%).
The motor is protected by a PTC resistor. Therefore, this parameter is not
necessary.
❏ P081 - P 085 (motor data)
Please set this parameters to the values indicated on the type plate of the
motor.
(➜
Observe operating instructions of the manufacturer.
)
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