Danfoss EKC 302A User Manual

2 Manual RS8DZ702 © Danfoss 03-2012 EKC 202 / 302
Introduction
Application
• The controller is used for temperature control refrigeration
appliances and cold room in supermarkets
• Control of defrost, fans, alarm and light
• EKC 202 for front panel mounting
• EKC 302 for DIN-rail mounting
Principle
The controller contains a temperature control where the signal
can be received from one temperature sensor.
The sensor is placed in the cold air ow after the evaporator or in
the warm air ow just before the evaporator.
The controller controls the defrost with either natural defrost or
electric defrost. Renewed cutin after defrost can be accomplished
based on time or temperature.
A measurement of the defrost temperature can be obtained
directly through the use of a defrost sensor.
Two to four relays will cut the required functions in and out – the
application determines which:
• Refrigeration (compressor or solenoid valve)
• Defrost
• Fan
• Alarm
• Light
The dierent applications are described on next page.
Advantages
• Integrated refrigeration-technical functions
• Defrost on demand in 1:1 systems
• Buttons and seal imbedded in the front (EKC 202)
• IP65 density from the front panel (EKC 202)
• Digital input for either:
- Door contact function with alarm
- Defrost start
- Start/stop of regulation
- Night operation
- Change-over between two temperature reference
- Case cleaning function
• Instant programming via programming key
• HACCP
Factory calibration that will guarantee a better measuring accu-
racy than stated in the standard EN 441-13 without subsequent
calibration (Pt 1000 ohm sensor)
Extra module
• The controller can afterwards be tted with an insertion module
if the application requires it.
The controller has been prepared with plug, so the module
simply has to be pushed in.
Contents
Introduction ....................................................................................................... 2
Operation ............................................................................................................ 5
Menu survey ....................................................................................................... 6
Functions ............................................................................................................. 8
Override .............................................................................................................15
Connections .....................................................................................................16
Ordering ............................................................................................................18
Technical data ..................................................................................................19

Danfoss EKC 302A Specifications

General

Brand	Danfoss
Model	EKC 302A
Category	Controller
Language	English