Superheat Control Mode - Danfoss EKE 1A User Manual

Superheat controller, Type EKE 1A, 1B, 1C, 1D
Table 22: Driver Mode using Communication Bus
Parameter
RI02
I091
I033
O045
B100
X004
X002

6.2 Superheat Control Mode

In this section some important parameters for SH control mode and other sub modes are described.
For basic superheat control, one temperature sensor S2, and one pressure sensor Pe are needed. The actual
superheat is calculated based on these two sensor readings, and the controller will adjust the OD of the valve to
bring the superheat to the desired reference. If superheat is too low the flow in the expansion is decreased and
superheat will be higher and vice versa. For advanced SH control the use of additional temperature and pressure
sensors are needed.
Figure 57: EKE as SH controller
EKE 1X
EEV
Table 23: Super Heat Control Parameters
Parameter Function
Reference
R012 Main switch
R102 Operation mode
R014 Thermostatic Mode
Temperature
R009 Sensor S2
correction
Pressure sensor
R107
Pe correction
Sensor configuration
S2 sensor
I082
configuration
© Danfoss | Climate Solutions | 2022.06
Function
Operation mode
Driver reference configuration for 1B
Driver reference configuration for 1C
Manual OD
Manual step
Modbus main switch
Modbus preset OD
Pe
S2
Selector
On
SH control
0-Not Used
1-Cut-in/cut-out mode
2-MTR modulating thermostat
mode.
Defined by the user in K
Defined by the user in Brag
Select based on the supported
temperature sensors
Description
Mode selection, select 1 to operate as valve driver
1 = valve Driver,
Select reference configuration,
1- Modbus to OD| the controller receives opening degrees from
2- Modbus to steps| the controller receives opening degrees
from the bus
1 = Bus to OD|
2 = Bus to step
Set the desired OD in percent
Set the desired OD in number of steps
1 = ON, 0 = OFF
1 = ON, 0 = OFF
Description
• The software main switch is used to start / or stop refrigerating
• The hardware main switch (DI) can be used also.
• If the main switch is on changes are not allowed.
Selected to use EKE in the superheat control mode
If you select Not used, only superheat is regulated regardless of the me-
dia temperature.
Correction value for temperature sensor. This value is defined by the
user.
Correction value for pressure sensor. This value is defined by the user.
Selection of the used temperature sensor.
BC398828796060en-000101 | 41
the bus