Danfoss AK-CC55 User Manual

Connections
AI1
Pressure transmitter
AKS 32R
Connect to terminal 40, 41 and 42.
(Use cable 060G1034: Black=40, Brown=41, Blue=42)
The signal from one pressure transmitter can be received by up to 10 controllers. But only if there are no signicant
pressure drops between the evaporators to be controlled. See Figure 39: AKS 32R info.

NOTE:
When replacing AK-CC 550 with AK-CC55, S and ground must be switched.
AI2 - AI7
Primarily for temperature inputs
• S2
Pt 1000 ohm sensor AKS11, placed at the evaporator outlet
• S3, S4, S5
Pt 1000 AKS11, PTC 1000 EKS111, NTC5K EKS211 or NTC10K EKS221 sensor. All have to be of the same type.
• S3, return 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 conguration)
• S5, defrost sensor, placed in the evaporator
• S6, Pt 1000 ohm sensor, food temperature sensor placed in-between the food products
(If the DI1 input is used for a temperature measurement e.g. S5B, it will appear as AI7.)
DI1
Digital input signal.
The dened function is active when the input is short-circuited or opened, depending on the function dened in
o02.
DI2
Digital input signal.
The dened function is active when the input is short-circuited or opened, depending on the function dened in
o37.
AO1
Analogue output signal
• Analogue 0 – 10 V
Can be used to drive an external stepper driver.
• Pulse width modulated signal
Can be used for fast pulse control of rail heat via an external power solid state relay.
MODBUS
For data communication.
• Terminal 83 = B-
• Terminal 84 = A+
• Terminal 85 = screen
 NOTE:
When replacing AK-CC 550 with AK-CC55 A+, B- and shield must be switched.
Supply voltage
• 230 V AC or 115 V AC
DO1
• AKV valve
Connection of expansion valve type AKV, AKVA, AKVH or AKVP. The coil must be a 230 V or 115 V AC coil.
• Liquid line solenoid valve
© Danfoss | Climate Solutions | 2021.02 BC364229688105en-000101 | 31
AK-CC55 Single Coil and Single Coil UI

Danfoss AK-CC55 Specifications

General

Brand	Danfoss
Model	AK-CC55
Category	Controller
Language	English