Weight; Materials; Control Unit - Grundfos DDI 222 Installation And Operating Instructions Manual

4.6 Weight

Pump type Dosing head material
DDI 60-10 PVC, PP, PVDF
DDI 60-10 Stainless steel, DIN 1.4571
DDI 150-4 PVC, PP, PVDF
DDI 150-4 Stainless steel, DIN 1.4571

4.7 Materials

Pump housing material
Pump and control unit housing: PPE-SB (fibre-reinforced
Lurranyl).
Pressure sensor (Flow Monitor)
Sensor: Aluminium oxide Al O
2 3
O-rings: FKM, EPDM or PTFE.
Pressure switch (MBS)
Pressure switch: Stainless steel, DIN 1.4305.
Diaphragm of the pressure switch: EPDM.
Warning
Observe the manufacturer's safety instructions when
handling chemicals!
The resistance of the parts that come into contact
with the media depends on the media, media
temperature and operating pressure. Ensure that
Caution
parts in contact with the media are chemically
resistant to the dosing medium under operating
conditions!
Further information on resistance with regard to the
media, media temperature and operating pressure is
Note
available on request.

4.8 Control unit

Functions of pumps with control unit
• "continuous operation" button for function test and suction
• memory function (stores a maximum of 65,000 pulses)
• two-stage tank-empty signal (e.g. via Grundfos tank-empty
sensor)
• stroke / pulse signal / pre-empty signal (adjustable)
• dosing controller or Flow Monitor function (only with sensor -
optional)
• diaphragm leakage detection (only with sensor - optional)
• access-code-protected settings
• remote on/off
• calibration (adjust the pump to local operating conditions)
• pressure control function / counter-pressure display
• dosing capacity display (can be reset)
• operating hours counter (cannot be reset)
• interface: PROFIBUS (optional).
Weight [kg]
5
7
6.5
12
(96 %).
Operating modes:
• manual
input/display of the dosing flow in l/h or gal/h.
quasi continuous dosing (short suction stroke, dosing stroke
as long as possible).
• contact signal control
input/display in ml/contact, most constant dosing
• current signal control 0-20 mA / 4-20 mA
adjustment of volumetric flow proportional to the current signal
(displayed in l/h).
weighting of current input/output.
• batch dosing
Setting the dosing capacity and dosing flow per batch
triggered manually or by an external contact signal.
• batch dosing with timer functions
– setting the dosing capacity and dosing flow per batch
– setting the start time for first batch
– setting the repeat time for subsequent batches.
• slow mode (for viscous media)
two-stage reduction of the maximum dosing flow to 66 % (slow
mode 1) or 41 % (slow mode 2).
Inputs and outputs
Inputs
Maximum load: 12 V, 5 mA
Contact signal Minimum pulse length: 10 ms
Minimum pause time: 25 ms
Maximum load: 22 Ω
Current 0-20 mA
Remote on/off Maximum load: 12 V, 5 mA
Tank-empty signal Maximum load: 12 V, 5 mA
Dosing controller and diaphragm leakage sensor
Outputs
Maximum load: 350 Ω
Current 0-20 mA
Maximum ohmic load:
Error signal
50 VDC / 75 VAC, 0.5 A
Stroke signal Contact time/stroke: 200 ms
Maximum ohmic load:
Pre-empty signal
50 VDC / 75 VAC, 0.5 A
4.8.1 Interface (optional)
• PROFIBUS.
13