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Daikin AGZ210E - User Manual

Daikin AGZ210E
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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

  • M
    Mary PetersonAug 15, 2025
    What causes motor overload relays or circuit breakers to open in my Daikin Chiller?
    • H
      Hunter ScottAug 15, 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.
  • T
    Tara AdamsAug 21, 2025
    Why is my Daikin AGZ210E Chiller's compressor noisy or vibrating?
    • B
      Betty StokesAug 22, 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.
  • A
    Amanda CummingsAug 26, 2025
    What causes high discharge pressure in my Daikin AGZ210E Chiller?
    • C
      Cathy ReeseAug 26, 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.
  • A
    Anthony WilliamsSep 1, 2025
    What to do if my Daikin Chiller compressor will not stage up?
    • J
      Jacob HahnSep 1, 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.
  • F
    fredalexanderSep 4, 2025
    Why are the compressor staging intervals too short on my Daikin AGZ210E?
    • A
      Andre NewtonSep 4, 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).
  • D
    Dana OwensSep 12, 2025
    What causes the compressor thermal protection switch to open on my Daikin Chiller?
    • B
      Brandy AdkinsSep 12, 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.
  • B
    Billy ChandlerNov 17, 2025
    What to do if my Daikin AGZ210E Chiller compressor will not run?
    • N
      nrobinsonNov 17, 2025
      If your Daikin Chiller compressor isn't running, there are several potential causes. First, ensure that the main or compressor disconnect switch is closed. Check for blown fuses or open circuit breakers, examining electrical circuits and motor windings for shorts or grounds. Also, check for loose or corroded connections, replacing fuses or resetting breakers after correcting any faults. Thermal overloads may have tripped; these are auto-resetting, so check voltages, cycle times, and mechanical operations, allowing time for the reset. A defective contactor or coil could also be the issue, requiring replacement. The system might be shut down by equipment protection devices; determine the cause and correct it before restarting. The unit may not require cooling, so wait until it calls for it. ...
  • A
    Angela GreenNov 27, 2025
    How to fix low suction pressure in a Daikin Chiller?
    • T
      Thomas SmithNov 28, 2025
      Low suction pressure in a Daikin Chiller can arise from various causes. Rapid load swings might be the culprit, requiring load stabilization. A lack of refrigerant could be the issue; check for leaks, repair them, and add refrigerant, also check the liquid sight glass. A fouled liquid line filter drier can cause this; check the pressure drop across it and replace if needed. An expansion valve malfunction may also be responsible; repair or replace it and adjust for proper superheat. Low condensing temperature can contribute; check the means for regulating condenser temperature. Other potential causes include compressors not staging properly (see corrective steps - Compressor Staging Intervals Too Low), insufficient water flow (correct the flow), excess or wrong oil used (recover or change t...

Summary

Installation and Application Information

Operating and Standby Limits

Specifies the temperature and pressure ranges for unit operation and standby.

Unit Placement

Service Clearance

Spacing Requirements

Chilled Water Piping

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

Inlet Strainer Guidelines

Water Flow Limitations

Explains constant and variable evaporator flow, and limits to prevent damage and ensure performance.

Evaporator Freeze Protection

Methods and components used to protect the evaporator from freezing in low ambient conditions.

High Ambient Operation

Requirements for units operating in high ambient temperatures, including optional packages.

Condenser Coil Options and Coating Considerations

Electrical Data

Panel High Short Circuit Current Rating

Information on the short circuit current rating of the control panel enclosure.

Electrical Control Center

Table 14: Electrical Data - Single Point (60;50 Hz)

Table 18: Electrical Data - Multiple Point (60;50 Hz)

Unit Controller Operation

Controller Inputs and Outputs

Details on analog and digital inputs and outputs for main controller, compressor modules.

EXV Module 1 and 2

Set Points

How set points are configured, adjusted, and stored in the unit controller.

Circuit Level Set Points

Set points specific to individual refrigerant circuits for fine-tuning operation.

Sequence of Operation

Unit Sequence of Operation - Cool Mode

Step-by-step process for chiller operation in cooling mode, including enabling and flow checks.

Unit Sequence of Operation - Ice Mode

Step-by-step process for chiller operation in ice mode, including delays and flow checks.

Circuit Sequence of Operation

Detailed sequence for individual circuit operation, including enabling, starting, and stopping compressors.

Unit Functions

Staging Temperatures

Unit Enable

Conditions and set points required for enabling the chiller to operate.

Unit Capacity Control

Methods for controlling unit capacity, including compressor staging and overrides.

RapidRestore Option

Features and operation of the RapidRestore® option for quick restart and loading.

Circuit Functions

Circuit Control Logic

Conditions for circuit enabling and compressor availability for starting and running.

Condenser Fan Control

EXV Control

Control states (Closed, Superheat) and operation of the electronic expansion valve.

Superheat Target

How the suction superheat target is selected based on circuit capacity and compressor status.

Position Commands

Alarms

Unit Fault Alarms

Faults that cause rapid stops, including PVM/GFP, flow loss, freeze protect, and sensor faults.

Circuit Fault Alarms

Faults specific to a circuit, such as low/high pressure conditions and sensor failures.

Mechanical High Pressure Switch

Trigger conditions and actions for the mechanical high pressure switch alarm.

Using the Controller

Passwords

Procedures for entering passwords to access different parameter levels.

Startup and Shutdown Procedures

Pre Startup

Pre-Startup Water Piping Checkout

Pre-Startup Electrical Check Out

Startup

Essential steps for initiating chiller operation, including setpoint verification and pump activation.

Post Startup

Shutdown

Procedures for temporary and extended shutdowns to protect the unit and system.

Unit Maintenance

Periodic Clean Water Rinse

Routine Quarterly Cleaning of ElectroFin Coated Coil Surfaces

Recommended Coil Cleaner

Filter-Driers

When to replace filter-driers based on pressure drop or moisture indication in the sight glass.

System Adjustment

Refrigerant Charging

Step-by-step procedures for recharging the unit with R-410A refrigerant, including safety precautions.

Troubleshooting Chart

Compressor Will Not Run

Common causes and corrective steps for when the compressor fails to start or run.

High Discharge Pressure

Low Suction Pressure

Compressor Thermal Protection Switch Open

Limited Product Warranty

Daikin AGZ210E Specifications

General IconGeneral
BrandDaikin
ModelAGZ210E
CategoryChiller
LanguageEnglish

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