Offsetting Superheat, Temperature And Od Via External Signal - Danfoss EKE 1A User Manual

Superheat controller, Type EKE 1A, 1B, 1C, 1D
Modulating thermostat (MTR)
When the temperature is well above the MTR set point (The MTR reference is defined by temperature set point + ½
differential) cooling capacity is at maximum and superheat is controlled to be on superheat reference. When
temperature is getting close to the MTR reference the cooling capacity gradually reduce so that the
temperature can be stable on the MTR reference and the superheat will be floating.
Figure 68: Modulating thermostat (MTR)
Temperature S3/S4
Compressor startup
MTR start
/
1
erential
2
Temperature
setpoint
Valve OD
Table 29: Modulating thermostat (MTR) parameters
Parameter Function
R014 Thermostatic Mode (2-MTR)
R015 Sensor
I041 S3 Temperature sensor
I041 S4 Temperature sensor
B101 Temperature setpoint, Deg C
R001 Differential
U118 Operational Status

6.2.3 Offsetting Superheat, Temperature and OD Via External signal

Temperature and superheat references can be displaced in positive or negative direction using a current signal
(EKE1C only), voltage signal or via Modbus.
Figure 69: Offsetting Superheat, Temperature and OD
Via External signal
EKE
Offset via External
Current signal.
Offset via External
Voltage signal.
Offset via Bus
© Danfoss | Climate Solutions | 2022.06
1A 1B 1C 1D
-
-
Time
Time
Description
• Uses a temperature setpoint (parameter R101), and the differential con-
stant(R001).
• The goal is to maintain the temperature media at the level defined by the set
point.
• If the temperature is higher than the reference + the differential, the supper
heat control will start, and it stops when the temperature goes below the ref-
erence.
Select the used sensor S3 or S4
Only if S3 is selected in R015, Selection of the used Media temperature S3
Only if S4 is selected in R015, Selection of the used Media temperature S4
Desired media temperature
Differential constant.
11= Injection MTR, (read value)
BC398828796060en-000101 | 47