Danfoss AK-PC 530 User Manual

2 Manual RS8EJ302 © Danfoss 05-2010 AK-PC 530
Introduction
Application
The controller is used for capacity regulation of compressors or
condensers in small refrigerating systems.
Numbers of compressors and condensers can be connected, as
required.
There are eight outputs and more can be added via an external
relay module.
Advantages
• Patented neutral zone regulation
• Many possible combinations for compressor constellations
• Sequential or cyclic operation
• Possibility of suction pressure optimisation via the data commu-
nication
Regulation
Regulation is based on signals from one pressure transmitter for
the compressor regulation and one pressure transmitter for the
condenser regulation plus one temperature sensor for the air
temperature before the condenser.
The two pressure transmitters can be replaced by two
temperature sensors when regulation has to be carried out on
brine systems.
• Pressure regulation P0 (pack)
• Temperature regulation Sx (chiller)
• Pressure regulation Pc (pack / chiller)
• Pressure regulation with variable reference (Sc3)
Functions
• Relays for compressor and condenser regulation
• Voltage output for capacity regulation of condenser
• Status inputs. An interrupted signal indicates that the safety
circuit has been activated and the respective circuit stopped
• Contact inputs for indication of alarms
• Contact inputs for displacement of references or for indication of
alarms
• Alarm relay
• External start/stop of regulation
• Possibility of data communication
Operation
All operation takes place either via data communication or via
connection of a display type EKA 164 or EKA 165.
Combinations
The controller has ten relay outputs two of which have been
reserved for the alarm function and for the ”VLT start/stop”
function.
For a start relays are reserved for compressor capacities starting
from DO1, DO2, etc.
The remaining relays up to and including DO8 will then be
available for fans. If more are required, one or more relay modules
type EKC 331 with max. eight steps can be connected. The signals
to these modules are to be taken from the controller’s analog
output. Another solution could be that the fan speed is controlled
via the analog output and a frequency converter.
If the alarm function and the ”AKD start/stop” function are left out,
all ten relay outputs may be used for compressors and fans (but
max. eight for compressors and max. eight fans).
Compressors and unloaders can
be combined in various ways. Cf.
survey on page 11.

Danfoss AK-PC 530 Specifications

General

Brand	Danfoss
Model	AK-PC 530
Category	Controller
Language	English