Introduction
Application
EKC 223/224 are multipurpose refrigeration controllers designed to fulfill today’s requirement of food retail
refrigeration applications. This controller is suitable for high, medium, and low temperature cabinets and cold
rooms with natural, electrical, or hot gas defrost.
Principle
The EKC 223/224 controls the temperature in the cabinet based on the measurement from a single sensor – Sair.
This sensor can be placed in the cold airflow after the evaporator or in the warm airflow before the evaporator,
depending on the construction and usage of the cabinet. A measurement of the defrost temperature can be
obtained using an S5 evaporator sensor or indirectly by using the Sair measurement.
Figure 1: Typical plug-in application with EKC 223/224
S
air
S5
S
air
Sc
Danf
oss
80G8429
EKC 223/224 controllers come with four push buttons, a big display, easy and intuitive menu structure, and pre-
defined applications ensure ease of use. Controller is loaded with energy efficiency features like smart evaporator
fan management, day/night mode and defrosts on demand features.
Advantages
• Several applications in same unit
• Quick setup for fast commissioning
• Digital inputs for various functions
• Control of compressor or liquid line solenoid valve
• High Effect 16 A relay enable direct connection of heavy loads without use of intermediate relay: up to 2 hp
compressors depending on its power factor and motor efficiency
• Alarm monitoring of condenser temperature with compressor stop protection
• Easy to integrate into Danfoss network systems via RS-485 adapter (EKA 206)
• Accurate temperature measurements
System overview
The EKC 223/224 controllers have a TTL port on the rear side of the controller and this TTL port allows the controller
to be connected to various interfaces.
© Danfoss | Climate Solutions | 2023.05
BC432222569027en-000201 | 5
Case controller, type EKC 223 and EKC 224