Wiring - Danfoss AK-CC55 Water Loop User Manual

AK-CC55 Water Loop

Wiring

Table 6: Wiring details
AI1 - AI5 Temperature inputs
• S3, S4, S5, S7, S8
Pt 1000 AKS11, PTC 1000 EKS111, NTC5K EKS211, NTC10K EKS221 or a user-defined sensor type. All have to be of the same type.
• S3, air sensor, placed in the warm air before the evaporator
• S4, discharge air sensor, placed in the cold air after the evaporator
(the need for either S3 or S4 can be selected in the configuration)
• S5, defrost sensor, placed in the evaporator
• S7, Brine inlet, placed at the inlet of the water cooled condenser
• S8, Brine outlet, placed at the outlet of the water cooled condenser
(If the S8 sensor is in use, DI1 input will appear as AI5.)
DI1 Digital input signal
The defined function is active when the input is short-circuited or opened, depending on the function defined in o02.
DI2 Digital input signal
The defined function is active when the input is short-circuited or opened, depending on the function defined in o37.
AO1
• In application mode 1-4 the output can be used to drive an external high-powered solid-state relay for fast pulsing of rail heat
• In application 5 and 6 the output is used for speed control of compressor
• In application 7 and 8 the output is used for speed control of a brine pump
The following output signals are supported:
• 0 – 10 V DC
• Frequency
• Pulse Width Modulation (PWM)
MODBUS For data communication.
• Terminal 83 = B-
• Terminal 84 = A+
• Terminal 85 = screen
Supply voltage 230 V AC or 115 V AC
DO1
Compressor or brine pump:
There is connection between terminal 8 and 9 when the compressor/brine pump is ON.
DO2
Alarm:
There is a connection between terminal 10 and 12 in alarm situations and when the controller is without power.
DO3 Fan:
There is connection between terminal 13 and 14 when the fan is ON.
DO4
Light or compressor 2:
There is connection between terminal 15 and 16 when compressor 2 is ON.
There is connection between terminal 15 and 17 when light is ON.
DO5
Defrost:
There is connection between terminal 18 and 19 when defrosting takes place.
Application 2 / 4 / 6 Here, the free outputs can be user defined for one of the following functions:
and 8
• Fan
• Fan ECO
• Defrost
• Rail heat
• Alarm
• Light
• Night blinds
• Air heater
• Condenser fan
Display (RJ12 plug)
If readings/operation of the controller is required, an external display can be connected.
The max. cable length is 100 m.
Electric noise
Cables for sensors, low voltage DI inputs and data communication must be kept separate from other electric cables:
• Use separate cable trays
• Keep a distance between cables of at least 10 cm
• Long cables at the low voltage DI input should be avoided
Installation considerations
Accidental damage, poor installation, or site conditions, can give rise to malfunctions of the control system, and
ultimately lead to a plant breakdown.
Every possible safeguard is incorporated into our products to prevent this. However, a wrong installation could still
present problems. Electronic controls are no substitute for normal, good engineering practice.
© Danfoss | Climate Solutions | 2022.04 BC378540472015en-000101 | 33