Danfoss EKC 202B, Руководство пользователя, Страница: 2 / 20

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 flow after the evaporator or in
the warm air flow 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 different 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 fitted 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