Table Of Contents; Introduction - Danfoss EKC 202D Manual

Introduction

Application
• The controller is used for temperature control refrigeration
appliances in supermarkets.
• With many predefined applications one unit will offer you
several options. Flexibility has been planned both for new
installations and for service in the refrigeration trade.
Principle
The controller contains a temperature control where the signal
can be received from one or two temperature sensors.
The thermostat sensors are either placed in the cold air flow after
the evaporator, in the warm air flow just before the evaporator,
or both. A setting will determine how great an influence the two
signals are to have on the control.
A measurement of the defrost temperature can be obtained
directly through the use of an S5 sensor or indirectly through
the use of the S4 measurement. Four relays will cut the required
functions in and out - the application determines which.
The options are the following:
• Refrigeration (compressor or relay)
• Fan
• Defrost
• Rail heat
• Alarm
• Light
The different applications are described on page 6.
Advantages
• Several applications in the same unit
• The controller has integrated refrigeration-technical functions,
so that it can replace a whole collection of thermostats and
timers
• Buttons and seal imbedded in the front
• Easy to remount data communication
• Two temperature references
• Digital inputs for various functions
• Clock function with super cap backup
Contents
Introduction ....................................................................................................... 2
Operation ............................................................................................................ 3
Applications ....................................................................................................... 6
Survey of functions .......................................................................................... 7
Operation ..........................................................................................................16
2 Manual RS8EE202 © Danfoss 08-2010
Menu survey .....................................................................................................17
Override .............................................................................................................19
Ordering ............................................................................................................19
Connections .....................................................................................................20
Data .....................................................................................................................21
EKC 202D