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General| Model | YLAA0260HE |
|---|---|
| Category | Chiller |
| Cooling Capacity | 260 Tons |
| Compressor Type | Scroll |
| Refrigerant | R-410A |
| Number of Circuits | 2 |
| Number of Compressors | 4 |
| Leaving Water Temperature Range | 40°F to 60°F |
| Voltage | 460V |
Outlines the safety codes and standards the chillers comply with, including ISO and ASHRAE.
Describes the self-contained, outdoor-designed YLAA chillers and their components for air conditioning applications.
Details the main system components including compressors, the cooler (evaporator), and condenser specifications.
Details components within the power panel, such as fan contactors, compressor contactors, and overloads.
Explains the structure and meaning of the YLAA unit's Product Identification Number (PIN) for model identification.
Illustrates the refrigerant circuit, including key components, sensors, and transducers for YLAA units.
Provides a diagram of the process and instrumentation, with a key for components and control functions.
Provides instructions and warnings for safely moving and lifting the chiller unit, emphasizing the use of lifting eyes.
Guides site selection for outdoor installation, considering air supply, sound, and necessary clearances.
Provides temperature/flow data, voltage limitations, and notes on evaporator protection and optional kits.
Provides detailed elementary wiring diagrams for YLAA0195 units, covering multiple sheets for circuit representation.
Offers connection wiring diagrams for YLAA0195 units, detailing connections between components and terminal blocks.
Contains elementary wiring diagrams for YLAA0220-YLAA0515 units, covering multiple sheets for circuit details.
Shows power panel connection diagrams for YLAA0220-YLAA0515 units, illustrating terminal block and component wiring.
Details micropanel connections for YLAA0220-YLAA0515 units, illustrating connector and terminal mapping.
Illustrates power options connection diagrams for YLAA0220-YLAA0515 units, showing transformer and circuit configurations.
Provides compressor wiring diagrams for YLAA0220-YLAA0515 units, detailing motor and sensor connections.
Shows condenser fan mapping and sequencing diagrams for YLAA0220-YLAA0515 units, illustrating fan control logic.
Specifies authorized personnel for commissioning and details pre-startup checks with unit power off.
Lists essential checks before initial start-up, covering piping, refrigerant, oil level, and pump operation.
Explains how to calculate and verify superheat and subcooling for system optimization and safety.
Introduces the microprocessor-based control system and its main components: IPU II, transformer, display, and keypad.
Details fault messages related to system safeties like High Discharge Pressure and Low Suction Pressure cutouts.
Describes unit safeties such as Motor Protector/High Pressure Cutout Faults and their corresponding messages.
Covers unit safeties related to low ambient temperature, low leaving chilled liquid temperature, and under voltage.
Organizes status key messages into General, Fault, and Unit Safeties & Warning categories for quick reference.
Provides a quick reference table listing all available operation data screens accessible via the OPER DATA key.
Explains how to obtain printouts of real-time data or history using the PRINT key and OPER DATA key.
Describes how to access history buffers via the HISTORY key to view safety shutdown details and system conditions at fault.
Provides a quick reference chart for navigating setpoints via the Cooling Setpoints, Schedule/Advance Day, and Program keys.
Provides a quick reference chart for programming various unit options using the keypad, covering all configurable settings.
Explains the steps to initiate the chiller's start sequence, including pump and flow switch requirements.
Details anticipatory controls that prevent low-pressure cutouts and limit discharge pressure to avoid safety limits.
Explains the logic for controlling leaving chilled liquid temperature, including setpoints, ranges, and compressor sequencing.
Details the return chilled liquid control strategy, compressor staging, and loading/unloading formulas.
Describes load limiting functionality and provides a table showing compressor operation stages based on load.
Details how to clear history buffers and enter Service Mode for unit configuration and diagnostics.
Explains analog pressure inputs, transducer connections, and provides formulas for voltage output verification.
Addresses problems like no display or unit not operating, providing causes and solutions.
Troubleshoots issues related to flow switch/remote stop permissive and low suction pressure faults.
Details procedures for checking compressor oil level and performing oil analysis for system health.
