Specifications

112 RK0YG302 © Danfoss 05/2007
AK-CC 550
AK-CC 550
Application
Complete refrigeration appliance control with great exibility to
adapt to all types of refrigeration appliances and cold storage
rooms.
Advantages
• Complete refrigeration appliance control
• Energy optimisation of the whole refrigeration appliance
• Adaptation to all refrigeration appliances/rooms via a simple
choice of application
• Fast set-up using pre-dened set-ups
• Built-in clock function with power reserve
Principle
Sensors
The temperature in the appliance is registered by one or two
temperature sensors which are located in the air ow before the
evaporator (S3) or after the evaporator (S4) respectively. A setting
for thermostat, alarm thermostat and display reading determines
the inuence the two sensor values should have for each indi-
vidual function.
In addition product sensor S6, which can be optionally placed in
the appliance, can be used and which can be used to register the
temperature near the required product in a certain place within
the appliance.
The temperature of the evaporator is registered with the S5 sensor
which can be used as a defrosting sensor.
Injection
Liquid injection in the evaporator is controlled by an electronic
injection valve of the type AKV. The control controls the opening
degree of the valve so that the evaporator is used optimally under
all conditions.
Superheat can be measured by using one of the following two
principles:
• Pressure sensor Pe and S2
• Two temperature sensors S1 and S2
Operation and data communication
The control has inbuilt MOD-bus data communication which can
be used for:
• Network connection
• Display connection
EKA 163 is used for display connection if only readouts are
needed or EKA 164 if operation is also needed.
If both data communication and display are required, the inbuilt
MOD-bus should be used for display. A loose data communication
module must also be mounted in the control. The module can
either be a MOD-bus module or a LON RS 485 module.
The location of the S1 sensor is crucial to a reliable signal and hereby to
satisfactory control.