Manually Operating The Valve; Operating The Valve Manually From The Ekc316A; Controller; Operating The Valve Manually By An Extern Analogue - Danfoss EKC 316A Reference Manual

Manually operating the valve

There are three modes for operating the valve manually and are
described in the following sections.
Operating the valve manually from the EKC 316A con-
troller
The opening degree of the ETS can be operated manually by
setting parameter o18 to 1 and then setting parameter o45 to
required opening degree from 0 to 100%
Note, relay outputs can also be checked using parameter o18 as
shown in extract from manual.
Manual control of outputs
For service purposes the individual relay outputs and the ETS-output can be forced
However only when regulation has been stopped.
OFF: No override
1: Relay to the solenoid valve is ON.
2: Relay to the solenoid valve is OFF
3: Alarm relay is activated (connection established between terminals 12 and 13).
After 600 seconds the manual control will be interrupted, and the setting will return
to "0".
In settings 1-3, "o45" will become active and the ETS output can be set manually.

Operating the valve manually by an extern analogue

signal

The opening degree of the ETS valve can operated manually with
0 to 20 mA or 4 to 20 mA external analogue signal connected
to terminals 16 (-) and 17 (+) of the controller. This can be done
by setting parameter o18 to 4 for 0 to 20 mA signal or 5 for 4 to
20 mA signal. The analogue input 0 or 4 mA will correspond to a
valve open of 0% and 20 mA will correspond to 100%.
Note this is not shown in the manual.
Operating the valve manually by an extern analogue

signal with MOP active

The opening degree of the ETS valve can operated manually with
0 to 20 mA or 4 to 20 mA external analogue signal connected to
terminals 16 (-) and 17 (+) of the controller in the same way as Sec-
tion 5.2. The difference is that the superheat controlling function is
still with transmitter and sensors connected. The signal operating
the ETS comes from the external signal or superheats controlling
function and will always be controlled by the smallest value of
these two sources
Input signal for reference displacement
Definition of function and signal range.
0: No signal
1: Displacement of temperature reference with 0-20 mA
2: Displacement of temperature reference with 4-20 mA
3: Displacement of superheat reference with 0-20 mA
4: Displacement of superheat reference with 4-20 mA
5: Forced control of valves opening degree with 0-20 mA
6: Forced control of valves opening degree with 4-20 mA
(4 or 0 mA will not give a displacement. 20 mA will displace the reference by the value
set in menu r06)
EKC 316A Reference manual RS8ED102 © Danfoss
o18 Manual ctrl
o10 AI A type
03-2006 11