Danfoss AK-CH 650

Capacity controller for
water chillers
AK-CH 650 SW 2.0
User Guide
ADAP-KOOL® Refrigeration control systems

Danfoss AK-CH 650 Specifications

General

Supply voltage	24 V AC/DC
Analogue inputs	4
Housing material	Plastic
Protection class	IP20
Application	Heating, ventilation, and air conditioning (HVAC) systems
Input voltage	0-10 V
Relative humidity	10% to 90% (non-condensing)
Weight	0.3 kg

Summary

1. Introduction

Application

2. Design of a controller

Module Survey

Overview of controller and extension modules, including input/output types.

Controller Module Details

3. Mounting and wiring

Mounting Procedures

Step-by-step guides for mounting controller and extension modules.

Wiring Connections

Explains how to connect inputs and outputs based on planned functions.

4. Configuration and operation

PC Setup and Connection

Connecting PC via "AK-Service Tool" for initial setup and operation.

System and Plant Configuration

Control Function Configuration

Configuring compressor and condenser control parameters and regulating functions.

IO Configuration and Verification

Network Installation and Initial Operation

Network setup, starting control, and basic operational procedures.

5. Regulating functions

Suction Group Compressor Control

Manages compressor capacity via PI control, zones, and coupling patterns.

Compressor Safety Functions

Pump Control and Monitoring

Condenser Capacity Control

Explains step and speed regulation for condenser fans based on pressure or temperature.

Condenser Safety Functions