Specifications

126 RK0YG302 © Danfoss 05/2007
EKC 315A
Water chiller application Air cooler application
EKC 315A
Application
The controller and valve can be used where there are require-
ments to accurate control of superheat and temperature in con-
nection with refrigeration.
E.g.:
• Cold store (air coolers)
• Processing plant (water chillers)
• A/C plant
Advantages
• The evaporator is charged optimally – even when there are
great variations of load and suction pressure
• Energy savings – the adaptive regulation of the refrigerant injec-
tion ensures optimum utilisation of the evaporator and hence a
high suction pressure
• Exact temperature control – the combination of adaptive
evaporator and temperature control ensures great temperature
accuracy for the media
• The superheating is regulated to the lowest possible value at
the same time as the media temperature is controlled by the
thermostat function
Functions
• Regulation of superheat
• Temperature control
• MOP function
• ON/OFF input for start/stop of regulation
• Input signal that can displace the superheat reference or the
temperature reference
• Alarm if the set alarm limits are exceeded
• Relay output for solenoid valve
• PID regulation
• Output signal following the temperature showing in the display
System
The superheat in the evaporator is controlled by one pressure
transmitter P and one temperature sensor S2.
The valve can be one of the following types:
• ICM
• AKV (AKVA)
ICM is an electronically, directly run engine valve, controlled by an
ICAD type actuator. It is used with a solenoid valve in the liquid
line.
AKV is a pulsating valve.
Where the AKV valve is used it also functions as solenoid valve.
Temperature control is performed based on a signal from
temperature sensor S3 which is placed in the air current before
the evaporator. Temperature control is in the shape of an ON/OFF
thermostat that shuts o the liquid ow in the liquid line.