Grundfos DMH 25X Installatie- En Bedieningsinstructies pagina 12
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Zie ook voor DMH 25X:
- Installatie- en bedieningsinstructies (52 pagina's) ,
- Installatie- en bedieningsinstructies (10 pagina's) ,
- Installatie- en bedieningsinstructies (14 pagina's)
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Beschikbare talen
Beschikbare talen
3.6.1 Inputs and outputs
Inputs
Contact signal
Current 0-20 mA
Remote on/off
Two-stage tank-empty signal
Dosing controller and diaphragm leakage sensor
Outputs
Current 0-20 mA
Error signal
Stroke signal
Pre-empty signal
AR control unit factory settings
•
Inputs and outputs: NO (normally open)
or
•
inputs and outputs: NC (normally closed).
3.7 Power supply
Power supply for AC voltage
Permissible deviation from rated
Rated voltage
230 / 400 V
240 / 415 V
115 V
Maximum permissible mains impedance
(0.084 + j 0.084) Ohm (testing according to DIN EN 61000-3-11).
These details apply to 50 Hz.
3.8 Ambient and operating conditions
•
Permissible air humidity: max. relative humidity:
70 % at +40 °C, 90 % at +35 °C.
The installation site must be under cover!
Caution
Do not install outdoors!
3.8.1 DMH with motor labelled for coolant temperature -20 °C
≤ T
≤ 40 °C
amb
•
Permissible ambient temperature: 0 °C (standard) to +40 °C
(for an installation height up to 1000 m above sea level)
•
Pumps with minimum T
amb
•
Permissible storage temperature: -20 °C to +50 °C.
3.8.2 DMH with motor labelled for coolant temperature -20 °C
≤ T
≤ 55 °C and with dosing head material
amb
stainless steel or PVDF
•
Permissible ambient temperature: 0 °C (standard) to +55 °C
(for an installation height up to 1000 m above sea level)
•
Pumps with minimum T
amb
•
Permissible storage temperature: -20 °C to +55 °C.
Note
Observe the nameplate of the motor.
12
Maximum load: 12 V, 5 mA
Maximum load: 22 Ω
Maximum load: 12 V, 5 mA
Maximum load: 12 V, 5 mA
Maximum load: 350 Ω
Maximum ohmic load:
50 VDC/75 VAC, 0.5 A
Contact time/stroke: 200 ms
Maximum ohmic load:
50 VDC/75 VAC, 0.5 A
value
± 10 %
± 10 %
± 10 %
-20 °C available on request
-20 °C available on request
3.9 Dosing medium
In the event of questions regarding the material
Note
resistance and suitability of the pump for specific
dosing media, please contact Grundfos.
The dosing medium must have the following basic characteristics
for the standard pumps:
•
liquid
•
non-abrasive
The dosing of abrasive media is possible with certain versions,
on request.
•
non-flammable
The dosing of inflammable media is possible with certain
versions of explosion-proof pumps, in accordance with ATEX.
Maximum permissible viscosity at operating temperature*
Applies to:
•
Newtonian liquids
•
non-degassing media
•
media without suspended matter
•
media with a density similar to water.
Note that the viscosity increases with decreasing
Note
temperature!
Up to stroke
rate 63
Pump model
[n/min]
Maximum viscosity* [mPa s]
DMH 251
300
DMH 252
300
DMH 253
300
DMH 254
300
DMH 255
200
DMH 257
200
* The stated values are approximate values and apply to the
standard pumps.
Permissible media temperature
Min. media
Dosing head
temperature
material
[°C]
PVC
0
Stainless steel,
-10
DIN 1.4571*
Alloy C-4,
-10
2.4610*
PP
0
PVDF**
-10
* For SIP/CIP applications (not with ATEX): A temperature of
145 °C at a counter-pressure of max. 2 bar is permitted for a
short period (15 minutes).
** At 70 °C, the maximum counter-pressure is 9 bar.
Warning
Observe the chemical manufacturer's safety
instructions when handling chemicals!
Stroke rate
From stroke
rate 121
64-120
[n/min]
[n/min]
100
50
100
50
100
10
100
5
100
5
50
5
Max. media temperature
p <
p <
p <
10 bar
16 bar
25 bar
[°C]
[°C]
[°C]
40
20
-
90
90
90
90
90
90
40
20
-
60
20
-
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