Danfoss ECL Comfort 210 Operating Manual page 80

Operating Guide ECL Comfort 210/296/310, application A237/A337
Thermo-hydraulic actuator, ABV
Danfoss thermo-actuator type ABV is a slow acting valve actuator.
Inside the ABV an electric heat coil will heat a thermostatic element
when an electric signal is applied. When heating the thermostatic
element it expands in order to manage the control valve.
Two basic types are available: ABV NC (Normal Closed) and ABV NO
(normal open). For example, ABV NC keeps a 2-port control valve
closed when no open-signals are applied.
Electric open-signals come from the electronic output of the ECL
Comfort controller in order to manage the control valve. When
open-signals are applied to the ABV NC, the valve gradually opens.
Open-signals are in the ECL Comfort controller expressed as
"Arrow-up" (open) and displayed at the valve symbol.
When the flow temperature (for example at S3) is lower than the
desired flow temperature, relatively long open-signals come from
the ECL Comfort controller in order to increase the flow. By this,
the flow temperature will over time be aligned with the desired
temperature.
Oppositely, when the flow temperature is higher than the desired
flow temperature, relatively short open-signals come from the ECL
Comfort controller in order to reduce the flow. Again, the flow
temperature aligns, over time, with the desired temperature.
The control of the Danfoss thermo-actuator type ABV uses a unique
designed algorithm and is based on the PWM principle (Pulse
Width Modulation), where the duration of the pulse determines
the management of the control valve. The pulses are repeated
each 10 sec.
As long as the flow temperature corresponds to the desired
temperature, the duration of the open-signals will remain constant.
Parameters indicated with an ID no. like "1x607" mean a universal
parameter.
x stands for circuit / parameter group.
MENU > Settings > Control parameters
Actuator
Selection of valve actuator type.
ABV:
Danfoss type ABV (thermo actuator).
GEAR: Gear motor based actuator.
80 | © Danfoss | 2017.05
1x024
ABV / GEAR GEAR
When selecting "ABV", the control parameters:
• Motor protection (ID 1x174)
• Xp (ID 1x184)
• Tn (ID 1x185)
• M run (ID 1x186)
• Nz (ID 1x187)
• Min. act. time (ID 1x189)
are not considered.
VI.LG.R3.02