To Next PageTo Next Page
Need help?Do you have a question about the York YLAA0195HE and is the answer not in the manual?
Outlines the primary responsibilities for safe operation and maintenance of the unit.
Explains the Product Identification Number (PIN) nomenclature for unit models and features.
Refers to Figure 6, the process and instrumentation diagram, showing system components and control functions.
Discusses site selection for outdoor installation, considering air supply, sound, and clearances.
Provides guidance on connecting chilled liquid piping, emphasizing straight runs and support.
Provides operational limitations for temperatures and flows, including notes on brine and ambient conditions.
Provides physical data in English for standard efficiency YLAA units, including dimensions and weights.
Provides physical data in English for high efficiency YLAA units, including dimensions and weights.
Introduces electrical information, including micropanel power supply and voltage ranges.
Presents detailed electrical data for single point and dual point configurations, including circuit amps and fuse/breaker sizes.
Refers to Figure 50, showing unit clearances for all models, with notes on obstructions and adjacent units.
Refers to Figure 51, showing weight distribution and isolator mounting positions for various models.
States that commissioning must be performed only by authorized Johnson Controls personnel.
Details basic checks to be made with the customer power to the unit switched OFF.
Details checks to be performed using the Equipment Start-up Check Sheet with the unit powered on.
Provides a comprehensive checklist for pre-startup and startup procedures, covering unit checks, wiring, and system parameters.
Details procedures for calculating and verifying subcooling and checking suction superheat.
Details leak checking procedures for compressors, fittings, and piping to ensure no leaks.
Describes the operating sequence from power application to compressor and fan staging, including timers.
Introduces the YORK Millennium Control Center, a microprocessor-based system for chiller control.
Explains the function of the STATUS key to determine current chiller operating status.
Introduces safety status messages, categorized into system and unit safeties.
Explains the DISPLAY/PRINT keys for retrieving system and unit information and printing data.
Explains the PRINT key function for obtaining real-time or history printouts of system data.
Explains the ENTRY keys (UP, DOWN, ENTER/ADV) for viewing and changing programmed values.
Explains programming the cooling setpoint and range via the COOLING SETPOINTS key.
Explains the SCHEDULE/ADVANCE DAY key for programming the seven-day daily and holiday schedules.
Explains how to access and program operating parameters using the PROGRAM key.
Explains the UNIT keys, specifically the OPTIONS key for configuring unit settings.
Explains the initiation of the start sequence for capacity control, requiring permissive inputs and no faults.
Explains suction pressure limit controls that prevent unit loading below a certain point.
Explains discharge pressure limit controls that unload the system before safety limits are reached.
Explains leaving chilled liquid control, including setpoint, range, and compressor sequencing based on temperature.
Explains return chilled liquid control, based on compressor staging to match cooling load.
Explains lead/lag operation and compressor sequencing for return chilled liquid systems.
Provides a troubleshooting table listing problems, causes, and solutions for common issues.
Continues the troubleshooting table, covering issues like low suction pressure, high discharge pressure, and low liquid temperature faults.
Continues the troubleshooting table, covering MP/HPCO faults, compressor start issues, and lack of cooling effect.
General