Daikin AGZ055E User Manual

Installation, Operation,
and Maintenance Manual
Trailblazer
™
Air-Cooled Scroll Chillers
Model AGZ, E Vintage
30 to 240 Tons (100 to 840 kW)
HFC-410A Refrigerant
50/60 Hz
IOM 1206-7
Group: Chiller
Part Number: IOM1206-7
Date: July 2016

Daikin AGZ055E Specifications

General

Brand	Daikin
Model	AGZ055E
Category	Chiller
Language	English

Summary

Pre-Start Checklist

Pre Start-Up Checklist

Checklist for pre-startup, covering unit condition, installation, electrical, and refrigerant systems.

Installation and Application Information (continued)

Operating and Standby Limits

Table detailing maximum and minimum operating and standby ambient and fluid temperatures.

Clearance for Building or Wall on One Side

Clearance for Three or More Units Side-by-Side

Pit Installation Guidelines

Guidance on pit installation requirements and considerations for operating problems.

Pit Installation for AGZ140-240E Models

Chilled Water Piping Requirements

Requirements for field-installed chilled water piping, including strainers and flow switches.

Water Flow Limitations

Information on constant and variable evaporator flow rates and pressure drops.

Chilled Water Pump Control

Details on controlling chilled water pumps via the chiller's microprocessor.

Low and High Ambient Operation

Operating considerations for low and high ambient temperature conditions.

Unit Placement and Service Clearance

Guidelines for unit placement, including required service clearances around the unit.

Clearance for Two Units Side-by-Side

Clearance with Open Screening Walls

Evaporator Freeze Protection

Methods and components for protecting the evaporator from freezing.

Electrical Data

Electrical Data Notes, Ratings, and Connections

Notes on electrical connections, HSCCR ratings, power connections, and control center components.

Electrical Data (continued)

Figure 44: Typical Field Wiring Diagram (Single-Point Connection)

Typical field wiring diagram for single-point electrical connections.

Figure 45: Typical Field Wiring Diagram (Multi-Point Connection)

Typical field wiring diagram for multi-point electrical connections.

Single Point Electrical Data Tables (60/50 Hz)

Multiple Point Electrical Data Tables (60/50 Hz)

Unit Controller Operation

Unit Controller Operation (continued)

Controller Inputs and Outputs

Detailed lists of analog and digital inputs and outputs for the main controller.

Set Points Overview

General information on set points, their adjustment, and storage.

Unit Level Set Point Defaults and Ranges

Detailed tables of default and adjustable set points for unit level configuration.

Communication Configuration Settings

Table detailing configuration settings for communication protocols like BACnet, Lonworks, and Modbus.

Circuit Level Set Points

Set points that apply individually to each refrigerant circuit.

Condenser Set Point Configuration Groups

Configuration Group 4 Set Points and Special Operation

Compressor Module I/O

Dynamic Set Point Ranges

Sequence of Operation

Unit Sequence of Operation - Cool Mode

Flowchart illustrating the sequence of operation for the chiller in Cool Mode.

Sequence of Operation (continued)

Unit Sequence of Operation - Cool Mode (continued)

Further continuation of the unit sequence of operation flowchart for Cool Mode.

Unit Sequence of Operation - Ice Mode

Flowchart illustrating the sequence of operation for the chiller in Ice Mode.

Unit Sequence of Operation - Ice Mode (continued)

Further continuation of the unit sequence of operation flowchart for Ice Mode.

Unit Functions

Unit Capacity Control

Explanation of how unit capacity is controlled based on compressor staging and limits.

Unit Functions (continued)

Compressor Staging Logic

Details on compressor staging logic for Cool and Ice modes, including delays and sequences.

Unit Capacity Overrides and Demand Limit

Unit Mode Settings and Glycol Configuration

Details on setting the unit operating mode and configuring glycol use.

Freeze Protection and Pump Control

Explanation of freeze protection mechanisms and evaporator pump control logic.

RapidRestore® Option Overview

Description of the RapidRestore option for faster unit restart and loading.

LWT Target and Reset

Evaporator Pump Control States

Circuit Functions

Circuit Functions (continued)

Compressor Control Logic

Logic for enabling circuits and controlling compressor availability and operation.

Condenser Target and Fan Staging Logic

Explanation of condenser target selection and the logic for staging condenser fans up and down.

Condenser Staging

EXV Control States and Operation

Explanation of EXV control states (Closed, Superheat) and operation.

Low Evaporator and High Condenser Pressure Handling

Alarms

Unit Fault Alarms

Details on unit fault alarms, including triggers, actions, and reset procedures.

Circuit Fault Alarms

Details on circuit fault alarms, including triggers, actions, and reset procedures.

Alarms (continued)

Unit Problem and Warning Alarms

Using the Controller

Unit Controller Schematic and Navigation

Schematic of the unit controller keypad and display, and guidance on navigation.

Using the Controller (continued)

Password Management and Editing Setpoints

Instructions for entering passwords, editing set points, and understanding access levels.

Optional Low Ambient Fan VFD

Low Ambient Fan VFD Operation and Inverter Basics

Inverter Output to Motor Connections

Optional Low Ambient Fan VFD (continued)

VFD Alarms, Faults, and Errors Types

Classification of VFD alarms, faults, and errors with their respective drive responses.

VFD Fault Reset Methods and Periodic Inspection

Methods for resetting VFD faults and a checklist for periodic equipment inspections.

Startup and Shutdown Procedures

Pre Startup Procedures

Detailed pre-startup procedures covering water piping and electrical checks.

Startup Steps

Key steps to follow for starting up the chiller, including verifying flow and settings.

Startup and Shutdown Procedures (continued)

Pumpdown Switch Positions and Shutdown Procedures

Unit Maintenance

Condenser Coil Cleaning Procedures

Unit Maintenance (continued)

Refrigerant Charging Procedures

Step-by-step instructions for recharging the unit with R-410A refrigerant.

R-410A Refrigerant Terminology, Safety, and POE Lubricants

Terminology, safety precautions for R-410A, and information on POE lubricants.

Refrigerant Charging and Service Notes

System Adjustment and Expansion Valve

Troubleshooting Chart

Compressor Issues Troubleshooting

Troubleshooting guide for compressor issues such as not running, noise, vibration, and pressure problems.

Troubleshooting Chart (continued)

Staging, Oil Level, and Motor Protection Troubleshooting

Troubleshooting for compressor staging, oil levels, motor overloads, and thermal protection.

Limited Product Warranty

Mandatory Product Startup and Warranty Period