Daikin AGZ150E User Manual

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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

Table of Contents

Questions and Answers:

E
Elizabeth BeckAug 14, 2025
What causes motor overload relays or circuit breakers to open in my Daikin Chiller?
- B
  Brooke MontoyaAug 14, 2025
  If motor overload relays or circuit breakers are opening in your Daikin Chiller, it could be due to a voltage imbalance or voltage being out of range, requiring correction of the power supply. Defective or grounded wiring in the motor can also cause this, necessitating compressor replacement. Loose power wiring or burnt contactors are other potential causes; check all connections and tighten them, replacing contactors if needed. High condenser temperature can also trigger this issue; refer to corrective steps for High Discharge Pressure.
J
Julie MayoAug 20, 2025
Why is my Daikin AGZ150E's compressor noisy or vibrating?
- H
  hmorrisAug 21, 2025
  A noisy or vibrating Daikin Chiller compressor can stem from several issues. It could be due to low lift or an inverted start, which may require control adjustments or condenser fan VFDs. Another cause might be the compressor running in reverse; check the unit and compressor for correct phasing. Improper piping or support on the suction or discharge lines can also lead to noise and vibration, necessitating relocation, addition, or removal of hangers. Worn compressor isolator bushings can be a source of the problem, requiring replacement. In more severe cases, the compressor may have a mechanical failure, which would also require replacement.
D
Dana PrattAug 25, 2025
What causes high discharge pressure in my Daikin AGZ150E Chiller?
- J
  jessicabowmanAug 25, 2025
  High discharge pressure in your Daikin Chiller can result from several factors. Noncondensables in the system may be the cause; extract them using approved procedures or replace the charge. The circuit might be overcharged with refrigerant, requiring you to remove the excess and check liquid subcooling. Ensure the optional discharge shutoff valve is open. Incorrect condenser fan control wiring or a non-running fan can also lead to high pressure; correct the wiring or check the electrical circuit and fan motor, respectively. A dirty condenser coil or air recirculation could also be responsible; clean the coil or correct the recirculation issue.
D
David LunaAug 31, 2025
What to do if my Daikin AGZ150E Chiller compressor will not stage up?
- M
  Michael Mathis PhDAug 31, 2025
  If your Daikin Chiller compressor isn't staging up, it could be due to a defective capacity control, which would need replacement. Another possibility is a faulty sensor or wiring, also requiring replacement. Finally, the stages might not be set correctly for the application; adjust the controller settings accordingly.
M
Michael GravesSep 3, 2025
Why are the compressor staging intervals too short on my Daikin Chiller?
- D
  dpattersonSep 3, 2025
  Short compressor staging intervals on your Daikin Chiller can be attributed to several factors. The control band may not be set properly, necessitating an adjustment of the controller settings for the application. A faulty water temperature sensor could be the cause, requiring replacement. Insufficient water flow can also lead to this issue; correct the flow. Other potential causes include rapid temperature or flow swings (stabilize the load), oversized equipment (evaluate equipment selection), the chiller being enabled with no load (evaluate BAS sequence and settings), or light loads (evaluate the need for HGBP or thermal inertia).
A
amillerSep 9, 2025
What causes the compressor thermal protection switch to open on my Daikin AGZ150E?
- S
  sperezSep 10, 2025
  The compressor thermal protection switch opening on your Daikin Chiller can be caused by several factors. It could be due to operating beyond design conditions, requiring correction to stay within allowable limits. A discharge valve not being open can also trigger this; ensure the valve is open. Short cycling can lead to this issue; stabilize the load or correct control settings for the application. Voltage range issues or imbalance can be responsible; check and correct the voltage. High superheat can also cause the switch to open; adjust to correct superheat. In some cases, compressor mechanical failure may be the cause, necessitating compressor replacement.

Daikin AGZ150E Specifications

General

Brand	Daikin
Model	AGZ150E
Category	Chiller
Language	English

Summary

Installation, Operation, and Maintenance Manual

Trailblazer™ Air-Cooled Scroll Chillers Overview

Introduces the product series and its main features.

Installation and Application Information

General Description, Inspection, and Handling

Product overview, arrival inspection, and safe unit handling procedures.

Operating Limits and Unit Placement

Operating Limits, Placement, and Clearance

Guidelines for unit operation, installation location, and required space.

Chilled Water Piping

Piping Requirements and Guidelines

Essential installation details for water piping system.

Water Flow, System Considerations, and Freeze Protection

Water Flow Limitations and Evaporator Freeze Protection

Operational constraints on water flow and critical freeze prevention measures.

Electrical Data

Wiring Notes, Voltage Limitations, and Circuit Breakers

Panel Ratings, Control Center, and Power Connections

Typical Field Wiring Diagram (Single-Point Connection)

Wiring schematic for single-point power connections.

Typical Field Wiring Diagram (Multi-Point Connection)

Wiring schematic for multi-point power connections.

Electrical Data Tables - Single Point

Electrical Data Tables - Multiple Point

Unit Controller Operation

Set Points

Set Point Defaults, Ranges, and Dynamic Adjustments

Communication Configuration Settings

Circuit Level Set Points

Circuit Mode, EXV, Condenser, and Sensor Settings

Sequence of Operation

Unit Sequence of Operation - Cool Mode

Step-by-step operational logic for cooling mode.

Unit Sequence of Operation - Ice Mode

Step-by-step operational logic for ice mode.

Circuit Sequence of Operation

Step-by-step operational logic for individual circuits.

Unit Functions

Unit Capacity Control and Compressor Staging

Management of unit capacity and compressor staging logic.

Unit Enable, Mode Selection, and States

Freeze Protection and Pump Control Logic

Critical protection measures and pump control strategies.

Unit Status Indicators and Evaporator Pump Control

LWT Target and Reset Functionality

Unit Capacity Control, Overrides, and Demand Limit

Capacity management, overrides, and demand limiting features.

Stage Limits, Network Limit, and Ambient Limits

RapidRestore® Option Functions

Circuit Functions

Circuit Status and Compressor Control Logic

Indicators for circuit status and compressor operation.

Cycle Timers, Condenser Fan Control, and Staging

Condenser Target, Staging Logic, and VFD Control

High IPLV, Microchannel Conditions, and EXV Control

Alarms

Unit Fault Alarms

Fault conditions affecting the entire unit.

Unit Problem/Warning Alarms and Circuit Faults

Problems, warnings, and circuit-specific faults.

Various Circuit, Sensor, and System Faults

Pressure-Related Events

Using the Controller

Optional Low Ambient Fan VFD

VFD Interface and Functionality

VFD Alarm and Indicator LED Meanings

VFD Alarms, Faults, and Errors Classification

Startup and Shutdown Procedures

Pre-Startup Checks and Startup Procedure

Essential checks and steps for initiating unit operation.

Pumpdown, Post Startup Checks, and Shutdown Procedures

Steps for pumpdown, post-startup verification, and unit shutdown.

Unit Maintenance

General Checks, Compressor, and Coil Maintenance

Coil Cleaning Procedures and Electrical Terminal Checks

Liquid Line Sight Glass and Expansion Valve

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

Critical information on refrigerant handling, lubricants, and charging.

Refrigerant Charging Procedures

Detailed steps for recharging the refrigerant system.

Refrigerant Charging Procedures (Continued)

Further details and safety notes for refrigerant charging.

Troubleshooting Chart

Compressor Troubleshooting

Diagnosing and resolving compressor issues like no run or noise.

Staging, Oil Level, and Motor Protection Troubleshooting

Warranty Registration Form

Pre-Startup Procedure and Checklist for Warranty

Steps required for warranty registration and initial checks.

Refrigeration System and Design Controls Warranty Checks

Start-Up Verification for Warranty

Microtech Status Check and Non-Microtech Readings

Limited Product Warranty

Warranty Terms, Exceptions, and Startup Requirements

Details of the product warranty, exceptions, and mandatory startup procedures.

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