Danfoss EKE 1A superheat controller
Danfoss EKE 1B superheat controller
Danfoss EKE 1C superheat controller
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Danfoss EKE 1A superheat controller
Danfoss EKE 1B superheat controller
Danfoss EKE 1C superheat controller
20 L can of Fuchs RENISO TRITON SE 170 refrigeration oil
Fuchs RENISO TRITON SE 170 ester refrigeration oil – 20 L can
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Danfoss AK-CC 750A evaporator controller
Danfoss AK-CC 750A evaporator controller

Danfoss EKE 1 superheat controller (1A, 1B, 1C)

Danfoss EKE 1 electronic superheat controller for stepper motor electronic expansion valves (ETS, ETS Colibri, KVS, CCM, CCMT). Three models: EKE 1A, EKE 1B and EKE 1C. Choose your model below to see its specifications.

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Description

The Danfoss EKE 1 is an electronic superheat controller that drives a stepper motor electronic expansion valve. Using a pressure transmitter and a temperature sensor at the evaporator outlet, it keeps the superheat at the lowest stable value, even with large load variations: the evaporator is better filled and the system uses less energy. It can also work as a simple valve driver, controlled by a PLC or a master controller. The three models differ in the number of sensors, the signals they accept and their communication: the EKE 1A for simple superheat control, the EKE 1B with Modbus and temperature control, and the EKE 1C, the most complete, with 3 sensors, 2 pressure transmitters and CANbus.

The three EKE 1 models

EKE 1A EKE 1B EKE 1C
Danfoss reference 080G5300 080G5350 080G5400
Superheat control yes yes yes
Temperature control (thermostat) – yes yes
Valve driver, controlled by 0–10 V signal 0–10 V signal or Modbus 0–10 V, 0–20 mA signal or Modbus
Temperature sensors 1 (S2) 2 (S2, S3 or S4) 3 (S2, S3, S4)
Sensor type NTC 10 kΩ NTC 10 kΩ NTC 10 kΩ or Pt1000
Pressure transmitters 1 1 2
Pressure signal ratiometric 0.5–4.5 V or 0–10 V ratiometric 0.5–4.5 V or 0–10 V ratiometric, 0–10 V or 0–20 mA
Digital inputs 3 2 2
Modbus RS485 – yes yes
Wired CANbus – – yes
Freeze protection (S4 sensor) – yes yes
High condensing temperature protection – – yes
Weight 130 g 130 g 170 g

Key benefits

  • Energy savings: minimum stable superheat (MSS) control or the LoadAP curve keeps the superheat as low as possible. Danfoss states up to 20% lower operating costs.
  • Wide valve choice: ETS 5M, ETS 6, ETS 8M, ETS 12.5 to ETS 400, ETS Colibri (ETS 12C to 100C), KVS 2C to KVS 42, CCM 10 to 40, CCMT 0 to CCMT 42 and CTR 20.
  • Protections: maximum operating pressure (MOP), low operating pressure (LOP) for heat pump cold starts, fast closing when the superheat gets too low, fast opening at compressor start, failsafe valve position on sensor error.
  • Power failure: the stepper valve stays open when power is lost. The relay controls a liquid line solenoid valve, or the Danfoss EKE 2U battery module (080G5555) closes the valve.
  • Easy setup from a PC with KoolProg software or with the MMIGRS2 display; LEDs show the controller status and the valve movement.
  • Applications: chillers, cold rooms (air coolers), process and cabinet cooling, air conditioning, heat pumps, transport refrigeration.

Common specifications

  • Supply 24 V AC ±20% (50/60 Hz) or 24 V DC, class II; consumption 7 to 20 VA depending on the valve.
  • Bipolar stepper motor output: 10 to 400 steps/s, 1.2 A peak, 12 W maximum.
  • 1 relay for the liquid line solenoid valve or alarm (NO 3 A, NC 2 A, 250 V AC); 18 to 24 V DC battery backup input.
  • External reference 0–5 V or 0–10 V (and 0–20 mA on the EKE 1C) to offset the setpoint or set the valve opening.
  • 35 mm DIN rail mounting, IP40 front (IP20 elsewhere), ambient temperature −20 to 60 °C.
  • Accessories: MMIGRS2 display (080G0294) and its 1.5 m cable (080G0075), MMIMYK gateway (080G0073), AK-PS 063, 130 and 250 power supplies (080Z0057 to 080Z0059).

For a display case or cold room with an AKV valve, see our Danfoss AK-CC55 controller.

Afric Froid, your Danfoss supplier

Afric Froid supplies Danfoss EKE controllers and the matching electronic expansion valves, installs them and provides after-sales service in Tunisia, Algeria, Senegal and Ivory Coast. Tell us your application, refrigerant and valve: we will choose the right model and send you a quote.

Additional information
ModelEKE 1A (080G5300), EKE 1B (080G5350), EKE 1C (080G5400)
Documentation

Official Danfoss documents for the EKE 1 controller, always in their latest version: