Sound Pressure Level; Electrical Data; Ar Control Unit - Grundfos DMH 25X Installation And Operating Instructions Manual

3.3.5 Maximum suction lift* (continuous operation) for media
with a viscosity similar to water
Pump model Pump type
DMH 251
DMH 252
DMH 21-10
DMH 43-10
DMH 253 DMH 67-10
DMH 83-10
DMH 100-10
DMH 50-10
DMH 97-16
DMH 102-10
DMH 136-16
DMH 143-10
DMH 254 DMH 166-16
DMH 175-10
DMH 202-16
DMH 213-10
DMH 276-16
DMH 291-10
DMH 255
DMH 272-16
DMH 340-16
DMH 440-10
DMH 450-16
DMH 520-16
DMH 575-10
DMH 257
DMH 680-16
DMH 750-4
DMH 770-10
DMH 880-10
DMH 1150-10
DMH 1500-4
* Applies to a filled dosing head.
3.3.6 Maximum suction lift (continuous operation) for media
with maximum permissible viscosity
For maximum permissible viscosity see section Dosing medium.
Pump model
All
Related information
3.9 Dosing medium
Maximum suction
lift
[m WC]
All 1
All 1
1
1
1
1
Flooded suction
1
1
1
1
1
1
1
1
1
Flooded suction
Flooded suction
All Flooded suction
1
Flooded suction
1
Flooded suction
Flooded suction
Flooded suction
Flooded suction
Flooded suction
Flooded suction
Flooded suction
Flooded suction
Flooded suction
Maximum suction lift
[m WC]
Flooded suction

3.4 Sound pressure level

Pump model
DMH 251
DMH 252
DMH 253
DMH 254
DMH 255
DMH 257
1 Testing according to DIN 45635-01-KL3.

3.5 Electrical data

3.5.1 Enclosure class
The enclosure class depends on the motor variant selected, see
motor nameplate.
The specified enclosure class can only be ensured if the power
supply cable is connected with the same degree of protection.
Pumps with electronics: The enclosure class is only met if the
sockets are protected! The data regarding the enclosure class
applies to pumps with correctly inserted plugs or screwed-on caps.
3.5.2 Motor
Version: see motor and pump nameplates.

3.6 AR control unit

Functions of pumps with electronics:
• "Continuous operation" button for function test and dosing head
deaeration
• memory function (stores a maximum of 65,000 pulses)
• two-stage tank-empty signal (e.g. via Grundfos tank empty
sensor)
• stroke signal/pre-empty signal (adjustable), e.g. as a feedback
to the control room
• dosing controller function (only with sensor - optional)
• diaphragm leakage detection (only with sensor - optional)
• access-code-protected settings
• remote on/off
• hall sensor
• operating hours counter
• motor monitoring.
Operating modes:
• manual
Stroke frequency: manually adjustable between zero and
maximum
• contact signal control
Multiplier (1:n) and divisor (n:1)
• current signal control 0-20 mA / 4-20 mA
Adjustment of stroke frequency proportional to the current
signal.
Weighting of current input.
1
dB(A)
55 ± 5
55 ± 5
65 ± 5
65 ± 5
75 ± 5
75 ± 5
11