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User
Guide RS8FZ402 © Danfoss 2015-07
EKC
313
Introduction
Application
The controller can be used in systems with cascade regulating and
CO2 as refrigerant on the low temperature circuit.
It regulates the cooling of the heat exchanger to optimise super-
heat.
Advantages
• Dedicated cascade controller
System
The controller must receive a signal from two pressure transmit-
ters and two temperature sensors. The pressure transmitters must
have a type AKS 32R or AKS 2050 ratiometric output signal, as
determined by the actual pressure conditions. The signal from the
pressure transmitters can be a voltage signal of either 0-10 V or
1-5 V.
Type AKS 11 temperature sensors can be used, but type AKS 21
must be used if the temperature exceeds 100°C.
Functions
Output signal
The controller has a voltage output on 0-10 V.
The signal can be used for:
• Indicating the valve's opening degree when using an ETS valve
• Controlling the valve when using an ICAD/ICMTS valve
Valves opening degree
The valve's opening degree can be limited.
Relay
The relay in the controller can be used for:
• Alarm relay
• Control of solenoid valve in liquid line
Start/stop
A switch can be connected for starting and stopping the regula-
tion.
PC-operation
The controller can be provided with data communication so that it
can be connected to other products in the range of ADAP-KOOL®
refrigeration controls. In this way operation, monitoring and data
collection can be performed from one PC – either on the spot or in
a service company.
Contents
Introduction ....................................................................................................... 2
Example ............................................................................................................... 3
Function overview ........................................................................................... 4
Operation ............................................................................................................ 8
Menu survey ....................................................................................................... 8
Connections .....................................................................................................10
Data .....................................................................................................................11
Ordering ............................................................................................................11
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84B2959.10