Specifications
38 RK0YG302 © Danfoss 05/2007
Evaporator controls and thermostatic expansion valves
Thermostatic expansion valves are used in traditional refrigeration
systems and refrigeration appliances with limited possibility
of energy savings where injection of refrigerant liquid into
evaporator is controlled by the refrigerant superheat. Therefore,
thermostatic expansion valves are especially suitable for liquid
injection in ”dry“ evaporators where the superheat at the
evaporator outlet is proportional to the evaporator load.
The evaporator controls for regulating refrigeration appliances
with thermostatic expansion valves or compressor are capable
of regulating dierent types of functions in order to full any
evaporator control demand. The controls have functions for
regulating/monitoring temperature, defrosting, doors, rail
heating, light and fan operation.
With remote communication as a part of ADAP-KOOL®
refrigeration control system, evaporator controls comprise
monitoring and control of display cases and cold rooms including
alarm monitoring improving performance of refrigeration system.
EKC controllers 102, 202 and AK-CC 210 improve operation
routines with cost optimised design for most common
applications
Characteristic of the EKC controllers 102, 202 and AK-CC 210 is
easy panel installation due to the integrated mounting brackets.
The controllers have high-eect 16A relays which enable direct
connection of heavy loads, such as compressor or defrost.
Also, all the controllers have built-in 230 V a.c. supply and
supports dierent types of sensors (Pt 1000, NTC and PTC).
The controllers have enhanced life-time and reliability thanks to
IP 65 rating, so no water spray can damage it. Copy key with room
for 25 controller setups ensures a fast and easy programming.
Factory calibration ensures that the measuring accuracy of
controllers in combination with a Pt 1000 sensor is better than
required in EN 441-13 without any subsequent calibration
ensuring compliance with HACCP.
EKC 301 as DIN-rail mounting controller is designed for room
temperature control via pump down or compressor start/stop.
EKC 301 is controlling compressor, fan, defrost and alarm and
it replaces several traditional controllers and defrost clocks due
optional Real time clock module.
There are other controllers like AKC 121 which are used in
applications where TEV-valves are used but additional hardware
or functions are required. The controls are capable of regulating
one or more evaporators, depending on the type of controls. The
controls are capable of regulating simultaneously temperature,
defrosting, door frame, rail heat, light and fan.
Introduction