Ar Control Unit; Required Energy; Ambient And Operating Conditions - Grundfos DMH 28X Instrucciones De Instalación Y Operación

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.
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).
10
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 V DC / 75 V AC, 0.5 A
Contact time/stroke: 200 ms
Maximum ohmic load:
50 V DC / 75 V AC, 0.5 A

3.7 Required energy

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.
Pumps with AR control unit only
Maximum permissible mains impedance: 0.084 + j 0.084 Ω
(testing according to EN 61000-3-11).
value
± 10 %
± 10 %
± 10 %
-20 °C available on request
-20 °C available on request