Daikin AGZ 100D User Manual

84 pages

To Next Page

To Next Page

Page #1 background image

Loading...

Page #1 background image

Operating & Maintenance Manual

OMM 1166-1

Group: Chiller

Part No. OMM1166-1

Effective: March 2014

Air-Cooled Scroll Compressor Chiller

AGZ025D – AGZ190D (Rev 0A) 25 to 190 Tons

50 - 60-Hertz, R-410A

Software Version 251699201

© 2014 Daikin Applied

Table of Contents

Table of Contents2
- Introduction3
  - Glycol Solutions5
  - Operating/Standby Limits9
- Pressure Drop Curves9
  - Minimum Allowable Flow Rates9
  - Pressure Drop Curves10
Microtech III Controller13

Questions and Answers:

Y
Yesenia AliAug 21, 2025
Why is the discharge pressure high on my Daikin Chiller?
- P
  Patrick ArroyoAug 21, 2025
  High discharge pressure in your Daikin Chiller can stem from several issues. Noncondensables might be present in the system, requiring extraction using approved procedures. The system could be overcharged with refrigerant, necessitating removal of the excess and a check of liquid subcooling. Ensure the optional discharge shutoff valve is fully open. Verify that the FanTrol wiring is correct and that the fan is running by checking its electrical circuit and motor. A dirty condenser coil can also cause this issue, so clean it thoroughly. Finally, correct any air recirculation problems.
M
Mindy SullivanAug 23, 2025
Why is my Daikin AGZ 100D Chiller compressor noisy or vibrating?
- J
  Joseph VanceAug 23, 2025
  If your Daikin Chiller compressor is making excessive noise or vibrating, start by checking the refrigerant charge, as low or no refrigerant can cause this. Ensure the compressor is running in the correct direction by verifying the unit and compressor phasing. Inspect the piping support on both the suction and discharge lines, relocating, adding, or removing hangers as needed. Finally, examine the compressor isolator bushings for wear and replace if necessary, and consider whether the compressor itself is worn, potentially requiring replacement.
E
Emily TateAug 28, 2025
What causes high suction pressure in Daikin Chiller?
- M
  Michele BergerAug 28, 2025
  High suction pressure in a Daikin Chiller may result from several causes. Check the control settings to ensure the water temperature isn't excessively high. An excessive load on the system can also lead to this issue; reduce the load or add additional equipment. If the expansion valve is overfeeding, inspect the remote bulb and regulate the superheat. Lastly, verify that the compressors are running in the correct direction by checking for proper phasing.
V
Vanessa MooreAug 31, 2025
What to do if Daikin AGZ 100D compressor oil level is too high or too low?
- K
  Kendra JohnsonAug 31, 2025
  If the oil level in your Daikin Chiller compressor is too high or too low, consider these potential causes. Oil may be hanging up in the piping, so review the refrigerant piping and correct as necessary. If the oil level is genuinely low, check for leaks and add oil. Inspect the oil line fittings for looseness and tighten them. If the level is too high, adjust the thermal expansion valve. Insufficient water flow can also cause a high oil level, so adjust the flow. Excessive liquid in the crankcase can also elevate the oil level; check the crankcase heater, reset the expansion valve for higher superheat, and verify the liquid line solenoid valve operation. Short cycling can also affect oil levels; stabilize the load or increase the staging interval.
S
sarah04Sep 2, 2025
What to do if the Daikin Chiller discharge pressure is low?
- J
  John AdamsSep 2, 2025
  Low discharge pressure in a Daikin Chiller can be caused by several factors. Refrigerant flood back is one possibility, requiring correction. If wind is blowing directly into the coil at low ambient temperatures, shield the coil or install wind guards. A faulty condenser temperature regulation system should be checked for proper operation. Insufficient refrigerant in the system can also cause this; check for leaks, repair them, and add charge. Additionally, low suction pressure and only one compressor operating can contribute to low discharge pressure.
B
barrerajamesSep 5, 2025
Why is my Daikin AGZ 100D Chiller compressor losing oil?
- G
  gibsonmariaSep 5, 2025
  If your Daikin Chiller compressor is losing oil, start by checking for refrigerant leaks and repairing them, then add refrigerant as needed. Also, check if the suction superheat is too high and adjust it accordingly. Finally, inspect the crankcase heater for burnout and replace it if necessary.
R
Ronald MillerSep 7, 2025
What to do if Daikin AGZ 100D Chiller compressor will not stage up?
- D
  Dylan BoothSep 7, 2025
  If your Daikin Chiller compressor isn't staging up, the issue might stem from a defective capacity control, which would need replacement. Alternatively, there could be a faulty thermostat stage or a broken wire, also requiring replacement. Finally, ensure that the stages are correctly set for the specific application by resetting the thermostat settings.
R
roylinSep 10, 2025
Why are the motor overload relays or circuit breakers open on my Daikin AGZ 100D?
- T
  Thomas MyersSep 10, 2025
  If the motor overload relays or circuit breakers in your Daikin Chiller are opening, it could be due to low voltage during high load conditions; check the supply voltage for excessive line drop. Defective or grounded wiring in the motor can also cause this, necessitating replacement of the compressor motor. Inspect for loose power wiring or burnt contactors, tightening all connections. Also, high condenser temperature and a power line fault causing unbalanced voltage can trigger this issue.
C
Colleen HaleSep 12, 2025
What causes the compressor thermal protection switch to open on a Daikin Chiller?
- R
  Ryan FisherSep 12, 2025
  If the compressor thermal protection switch on your Daikin Chiller is open, it could be due to operating beyond design conditions, requiring additional facilities to bring conditions within allowable limits. A partially shut discharge valve can also cause this, so ensure it's fully open. Additionally, a blown compressor internal gasket, voltage range issues or imbalance, high superheat, or compressor bearing failure can trigger this switch.

Daikin AGZ 100D Specifications

General

Brand	Daikin
Model	AGZ 100D
Category	Chiller
Language	English

Summary

Operating & Maintenance Manual

Air-Cooled Scroll Compressor Chiller

The main topic and model series of the manual.

Introduction to the Chiller

Provides a general overview of the chiller unit's features and components.

Hazard Identification Information

Details safety warnings and precautions for hazardous situations.

Ambient Air Temperature Limitations

Specifies the maximum and minimum ambient temperatures for unit operation.

Water Flow Limitations

Defines acceptable chilled water flow rates and pressure drop ranges.

Glycol Solutions Handling

Provides formulas and correction factors for using glycol in the system.

MicroTech® III Controller

Controller Overview and Features

General introduction to the controller's features and benefits.

Controller Inputs and Outputs

Details the various analog and digital inputs and outputs of the controller.

Unit Level Setpoints Configuration

Configuration parameters for unit modes, enabling, and control sources.

Controller Security and Access

Information on passwords for accessing controller functions.

Unit Functions and Control Logic

Unit Capacity Calculation

How the unit's total capacity is determined.

Unit Mode Selection and States

How to select different operating modes and unit states.

Circuit Functions and Logic

Defines the requirements for enabling circuits and compressor availability.

Compressor Control Logic

Rules for starting, stopping, and staging compressors.

Condenser Fan Control

How condenser fans are staged on/off.

EXV Control Modes

Automatic and manual control of the electronic expansion valve.

Alarms, Events, and Troubleshooting

System Overrides and Alarms

Conditions that override capacity control and unit fault alarms.

Warning and Circuit Fault Alarms

Warnings related to unit operation and faults specific to refrigerant circuits.

Circuit Events and Warnings

Events triggering compressor unloading and circuit warnings.

Alarm Logging and Clearing

Procedures for logging, viewing, and clearing active alarms.

AGZ-D Troubleshooting Chart

Causes and corrective steps for common compressor and system issues.

Controller Interface and Operation

Using the Controller Interface

Description of the controller's keypad, display, and navigation wheel.

Controller Navigation and Passwords

Procedures for entering and managing controller passwords.

VFD Interface (HMI) Operation

Explanation of the VFD's Human-Machine Interface and key functions.

LCD Display Information

Explanation of the data shown on the LCD display.

Startup, Maintenance, and Service

Startup Procedures

Step-by-step instructions for starting the chiller.

Pre-Startup Checks

Checks for water piping, refrigerant piping, and electrical connections.

Unit Maintenance

Routine checks and tasks for overall unit maintenance.

Refrigerant Charging Procedure

Step-by-step guide for charging the refrigerant system.

Filter-Drier Replacement Criteria

When to replace filter-driers based on pressure drop or moisture.

General Service Precautions

Safety warnings and general procedures for servicing the equipment.

Support and Information

Daikin Applied Training and Development

Information on training programs and resources.

Warranty Information

Details on the product warranty terms and conditions.

Aftermarket Services

Information on obtaining parts and service.

Related product manuals

Daikin AGZ 110D

Daikin AGZ 125D

Daikin AGZ 130D

Daikin AGZ 160D

Preview: Daikin AGZ 025D

Daikin AGZ 025D

Preview: Daikin McQuay AGZ-D

Daikin McQuay AGZ-D