Danfoss AMEi 6 iSET Data sheet
Data sheet
Intelligent electrical actuator
AMEi 6 iSET
Description
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AMEi 6 iSET actuator for intelligent optimization
of the District Heating/Cooling substation
operation. Automatic adjustment of Δp setting
on AFP 2, AFPQ 2 and AFQMP 2 controllers, used
in DHC systems.
Solution for dynamic DH systems with wide span
of min - max ow (Domestic Hot Water service)
and for systems with improperly sized control
equipment (oversized control valves, wrong
valve selection/characteristic, poor control
ratio...)
Auto stabilization function monitors control
signal and stabilizes oscillations at the partial/
low load operating conditions, by adjustment of
the Δp over the motorized control valve (MCV).
Constant-real time MCV operation improvement
led to more stable control without oscillations
and ow delivered up to the real needs
(overow prevention).
This results in stable temperature conditions
on the secondary side, improvement of ΔT on
the primary side and longer lifetime of installed
equipment.
Features:
· Auto stabilization function
· Electrical manual operation
· Position indication, LED signalization
· Adjustable min/max Δp setting by the end
switch (adjustable stroke limitation of the
pressure actuator)
· Thermal and overload protection
· External reset button
· Easy mounting, pre-fixing with the wire lock
· Anti-rotation strap for preventing actuator
from rotating
· Automatic calibration to the pressure actuator
stroke-reduced commissioning time
· Maintenance free
· Voltage or current input/output signal Y/X
· Modbus RS485
·
Galvanic insulation Y, X
· Equipped with cable glands
Main Data:
· Nominal voltage:
- 24 V ac/dc, 50/60 Hz
- 230 V ac, 50/60 Hz
· Control input signal: modulating
· Torque: 7 Nm
· Speed 36 s/turn (18 sec/mm)
· Full stroke time ~30 min
· Compatible with modulating 24 V and 230 V
actuators AME 20/23/30/33, AME 55/56, AME
85/86, AME 655/655GA/658/659
· Compatibility with 3 point AMV actuators not
available yet
iSET is not the solution for disturbances
and oscillations coming from the
network.
External oscillations generated by the other
substations, disturbances because of the
poor control at the heat source, or poor
network balancing in general are out of the
iSET range and can’t be managed.
Ordering
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Typ e
AMEi 6 iSET 230 ac 082G4300
AMEi 6 iSET 24 ac /dc 082G4301
Supply voltage
(V)
Code No.
Data sheet AMEi 6 iSET
Technical data
Please check power supply
and power consumption prior
connection!
Actuator type AMEi 6 iSE T
Power supply V 24 V ac/dc or 230 V ac; +10...-15%
Power consumption VA
Frequency Hz 50/60
Control input Y
Control output X
Torque Nm 7
Speed s/turn 36
Full stroke time min 30
Max. medium temperature
Ambient temperature 0 … + 55
Storage and transport temperature – 40... +70 (storing for 3 days)
Humidity 5-95% (no condensing)
Protection class
Grade of enclosure IP 54
Weight kg 2.5
Manual operation Electrical
Power failure response Actuator remains in last position
- marking in accordance with the standards
V 0-10 (2-10) [Ri = 40 kΩ]
mA 0-20 (4-20) [Ri = 500 Ω]
V 0-10 (2-10) [Ri = 10 kΩ]
mA 0-20 (4-20) [Ri = 510 Ω]
Depends on valve type. No limitations for 150 °C
°C
Low Voltage Directive (LVD) 2014/35/EU: EN 60730-1, EN 60730-2-14
Electromagnetic Compatibility Directive (EMC) 2014/30/EU: EN 61000-6-2,
EN 61000-6-3
8 (24V)
16 (230V )
230V- protection class II
24V- protection class III
Design
1. Service cover
2. Function buttons
3. Wire lock
4. Cable gland
5. End switch
6. LED signalization for actuator
operating modes
7. LED signalization for Modbus
communication status
Installation The actuators should be mounted in a dry
environment.
In case of outdoor installation, the actuator
has to be protected against climatic influences
by suitable measures. For exact installation
instruction manuals for relevant pressure
actuator should be followed.
Mechanical
Please check the allowed installation positions
for the valve and pressure actuator. AMEi
6 actuator can be installed in all positions
(seescheme). Allow for necessary clearance for
maintenance purposes (see section Dimensions).
Electrical connection
Electrical connections can be accessed by
removing the service cover.
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Data sheet AMEi 6 iSET
AMEi 6 iSET
Application principle
Example:
- Indirectly connected
heating system
- Return mounting
- Analog voltage signal
Auto stabilization function
control signal (from controller)
MCV position
Threshold
(% of valve opening)
iSET ∆p setting
P2
P1
P3
∆p For design flow
Fig. 1
Auto stabilization function (ASF)
iSET Auto Stabilization Function (ASF) constantly monitors control signal.
In case of appearing signal oscillations, iSET algorithm detects the oscillations and automatically
adjusts differential pressure (Δp ) over the motorized control valve (MCV) by changing the Δp setting
on the differential pressure controller.
This is done by stretching and squeezing the setting spring on the pressure actuator, until the control
signal is stabilized. Result is more stable operation conditions of MCV and improved substation/
system efficiency.
Operation principle (Fig . 1)
Auto Stabilization Function (ASF) searches for 3 consecutive peaks (P1, P2, P3) in control signal. When
peaks are detected and when the MCV position is below treshold, ASF calculates needed Δp reduction,
and reduces set Δp over the MCV by stretching the spring on the pressure actuator. When calculated point
is reached, it stops.
In case of repeating oscillations, procedure repeats, until the oscillations are eliminated and MCV is
opened more than 50% (factory set treshold of the valve stroke/control signal).
As soon as the control signal crosses threshold value, iSET moves towards to the initially set Δp (Δp set for
design flow conditions).
If the control signal is stable and below threshold, iSET remains in position.
To prevent the oscillations after the system is stabilized, ASF function monitors not only oscillations,
but also analyses type of control signal (slow damping, suitable damping, too strong damping…).
Based on signal specifics it provides proper reaction (Δp correction).
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Data sheet AMEi 6 iSET
Actuator operating modes
LED operating mode indicator
The three-colour (green/yellow/red) LED function indicators are located at the front of actuator top
cover. They indicate different operating modes.
RESET button
Actuators AMEi 6 iNET/iSET have external RESET button which is located on top cover of the actuator .
With this button you can enter or exit Stand-By mode (press once) or Self positioning mode based on
preset end switch positions (press and hold for 5 seconds). See next paragraph for mode details.
LED operating mode indicator
The three-colour (green/yellow/red) LED function indicators are located at the front of actuator top
cover. They indicate different operating modes.
Operating modes
• Calibration mode:
For calibration to the desired pressure actuator stroke (min-max spring setting). To start calibration
procedure, press and hold RESET button for 5 seconds until the green light starts flashing. End
positions of the actuator are automatically adopted based on pre-set end switch positions pins.
Actuator goes to the stationary mode and starts responding to the control signal.
• Stand-By mode for manual operation
Press the RESET button for 1 sec. to enter Stand-By mode. The actuator stops in current position
and stops responding to any control signal. Red light is constantly lit. You can manually operate the
actuator
Actuator will start to travel automatically in required direction. To stop it in desired position, press
the SQUEEZE SPRING or STRETCH SPRING button again.
For fine adjustments press & hold the SQUEEZE SPRING or STRETCH SPRING button for < 10 sec.
Actuator will travel in required direction as long as the button is pressed, but no longer than 10 sec.
Stand-by mode can be very useful during the commissioning, or for service purposes. To exit
Stand-By mode press the RESET button again.
by pressing and holding the SQUEEZE SPRING or STRETCH SPRING button for > 10 sec
.
• Positioning mode
The actuator is operating automatically, according to the control signal. When positioning is
finished the actuator goes to stationary mode.
• Stationary mode
The actuator is operating without errors.
• Error mode
Working temperature is too high - check the ambient temperature.
Actuator is not properly mechanically connected - check the connection. Pressure actuator is blocked.
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