Air Handling Unit (AHU) Controller Technical Bulletin

FANs , Controller SectionTechnical BulletinIssue Date 0899 1999 Johnson Controls, No. *4 Description*4 Standards Compliance6 Installation Procedures*8 Tools Needed8 General Mounting*10 Power Line Wiring Transient Noise Precautions*11 I/O and Communication Lines Wiring Transient Noise Precautions*12 Wiring Details14 Overview*14 Wiring the Termination Board (AS-AHU100-0)*18 Power and Zone Bus Connections*20 Analog Inputs20 Binary Inputs22 Binary Outputs22 Analog Outputs*23 Wiring the Zone Terminal*23 Wiring Sensors23 Wiring Actuators*29 Phone Jack Configuration29 Remote Setpoint*30 Technical BULLETINAir Handling Unit (AHU) Controller * Indicates those sections where changes have occurred since the last AHU Controller Air Handling Unit (AHU) ControllerNetworking the ControllerPage32 N2 Bus Characteristics*32 Installing the N2 Bus*34 Setting the N2 Address*34 N2 Wiring to the Network Control Module*34 N2 Wiring to Companion or Facilitator*36 Zone Bus Description*37 Downloading/Commissioning38 Overview*38 Via Zone Bus*38 Via N2 Bus*38 AHU Firmware*38 Troubleshooting40 Checking the Installation40 Tools Needed*40 HVAC PRO for Windows*42 N2 Bus Overview*44 Testing the N2 Bus*45 Configuring the Controller48 Using HVAC PRO for

including single zone, variable air volume, multi-zone, and dual duct. You may use the AHU as a standalone controller or connected to a FMS. When connected to the FMS, the AHU provides all point and control information to the rest of the network. The devices communicate through an Opto-22® RS-485 N2 Bus.

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