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General| Brand | McQuay |
|---|---|
| Model | AGS 230A' AGS 230B |
| Category | Air Compressor |
| Language | English |
Overview of the chiller's distributed control system components and their interconnections.
Details the hardware structure and terminology of controllers.
Describes the microprocessor and memory of the controllers.
Explains the controller's display and 6-button keypad functionality.
Explains the functions of the circuit controller for compressor and EXV.
Lists analog and digital inputs/outputs for the circuit controller.
Parameters remembered during power off, factory set and adjustable.
Defines the sequence for starting or stopping compressors based on operator preference.
Specifies conditions and timing for compressors to start or stop based on LWT.
How compressor capacity is adjusted via slide position target.
Uses Variable Frequency Drive for condenser pressure trim control via fan speed.
Logic for setting the target saturated condenser temperature.
EXV performs a pre-open function to ensure sufficient liquid refrigerant at startup.
EXV controls evaporator pressure to a calculated target.
EXV transitions to subcool control for primary operation when mode is Cool.
Lists analog and digital inputs and outputs for the unit controller.
Setpoints are updated from the master node or remain unchanged.
Controls enabling/disabling the chiller via various input options.
Sets the overall operating mode of the chiller (COOL, ICE, TEST).
Identifies unit stop alarms, conditions causing them, and actions taken.
Identifies circuit stop alarms, conditions, and manual reset requirements.
Describes the controller's display and keypad layout.
Explains the different modes and functions of the arrow keys.
Setpoints are protected by OPERATOR and MANAGER level passwords.
Screens used to view the operation or status of the entire unit or individual circuit.
Displays evaporator and entering water temperatures and setpoints.
Shows status for a specific circuit, including hours, starts, slide position.
Displays refrigerant pressures, temperatures, and superheat/subcooling.
Typical setpoint screens and how to select and change values.
Screens for viewing circuit compressor, refrigerant, EXV, and fan operation.
Defines compressor, EXV, and fan setpoint screens and their parameters.
Defines TEST screens for circuits, including fan, slide, oil return, and EXV tests.
Conditions under which the chiller remains off or is disabled.
Initiates the start sequence, including pump activation and flow verification.
Procedures for performing a seasonal start-up of the chiller.
Details pre-open, pressure control, and subcool control modes for the EXV.
Procedures for temporary shutdown, including pumpdown and safety precautions.
Steps for performing a long-term shutdown and subsequent start-up.
Methods to prevent freezing in the evaporator, including heater use and glycol.
Importance of monitoring discharge superheat for compressor loading and oil integrity.
Key parameters to determine for basic refrigerant charging.
How to connect the chiller to Building Automation Systems using various protocols.
Lists supported BAS protocols like BACnet, LonTalk, and Modbus.
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