Adding User Defined Refrigerant - Danfoss EKE 1A User Manual

Superheat controller, Type EKE 1A, 1B, 1C, 1D
Table 52: Common Valve parameters (For Danfoss/Non-Danfoss valves)
Parameter
I069
I073
I074
I078
I068
 NOTE:
Failsafe Position: During failsafe mode of operation (e.g., SH control sensor error or Thermostat sensor error) the
valve position can be set to full close, fixed opening degree or average calculated OD. For detail check section
Failsafe operation and parameter list under section control advance sub section Diagnostic SH and Emergency
cooling.

6.3.5 Adding user Defined Refrigerant

Most of the used common Refrigerants have been defined as a pre selectable profile under "Refrigerant list para
O030". for unlisted refrigerants, user defined refrigerants can be used.
Table 53: Adding user defined refrigerants
Parameter Function
O030 Refrigerant
O100 Antoine Constant A1
O101 Antoine Constant A2
O102 Antoine Constant A3
© Danfoss | Climate Solutions | 2022.06
Function
Valve OD During Stop
Overdrive Enable OD
Overdrive Block time
Preset OD
Valve neutral Zone
Description
13 = R User. to select user defined refrigerant
Antoine Constant A1 for the user defined refrigerant. Available only if O030 is on R user option.
Antoine Constant A2 for the user defined refrigerant. Available only if O030 is on R user option.
Antoine Constant A3 for the user defined refrigerant. Available only if O030 is on R user option.
Description
For some application, it is required that the valve remains open after the control-
ler is off. This parameter defines that OD in %.
 NOTE:
This parameter requires connecting a Battery Backup
The Overdrive happens only after Exceeding Override Enable OD.
To limit how frequent overdrive can performed the parameter [I074 - Overdrive
block time] defines the minimum time between 2 overdrive actions. The default
value is 10 minutes
Actual opening degree
1073
Override
Enabled OD
No overdrive No overdrive
Overdrive
Overdrive
1074 - Override Block Time
The DI can be used to force the valve to go to this opening degree.
EKE controller has a complex algorithm implemented to handle oscillation issues
related to output valve OD by defining some neutral zone. In neutral zone, the
valve will not move until it overcomes the definite variation in the valve opening
degree.
The benefit of using such techniques will not affect the performance of the sys-
tem but will reduce the problem related with the fluctuating signal, step loss and
hysteresis in the valve.
BC398828796060en-000101 | 60