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General| Refrigerant | R-134a |
|---|---|
| Condenser | Water-cooled |
| Compressor Type | Screw |
| Efficiency | High |
| Operating Voltage | 380V/3/60Hz |
| Weight | Varies with model; consult factory |
| Dimensions | Varies with model; consult factory |
Explains the meaning of safety symbols used in the document for hazard alerts.
Details the warranty coverage, conditions, and exclusions for YORK YVAA chillers.
Covers product compliance with international standards and directives.
Outlines the responsibilities of personnel involved with the machinery.
Warns against using the equipment outside its intended application or design parameters.
Provides safety information on handling refrigerants and oils used in the unit.
Describes the various safety labels and their meanings for safe operation.
Provides an overview of the YVAA chiller's design and technology.
Details the features and design of the semi-hermetic twin-screw compressors.
Covers the electrical design and components of the chiller system.
Details the automatic control functions of the chiller's microcomputer.
Outlines the safety features provided for the chiller's protection.
Provides guidance on unit shipping and operating weights for rigging.
Provides safety precautions for moving the chiller unit.
Step-by-step instructions for removing the unit from its shipping container.
Instructions for using the provided lifting lugs for unit handling.
Guidelines for lifting the unit using shackles.
Table detailing the locations and dimensions for unit lifting points.
Specifies requirements for selecting an optimal installation site for performance.
Details necessary clearances around the unit for proper airflow and service.
Lists the minimum recommended clearances for YVAA units.
Provides recommendations for chilled liquid piping installation.
Discusses the importance of water quality and treatment for the system.
Details the standard chilled liquid connections for evaporators.
Table listing evaporator connection dimensions for various models.
Offers recommendations for safe and satisfactory electrical connections.
Details requirements for electrical power wiring installation.
Provides guidelines for control wiring connections to the terminal block.
Illustrates the single point power wiring diagram for the unit.
Illustrates the dual point wiring diagram for the unit.
Provides a diagram and explanation for customer control connections.
Explains the wiring connections for the thermal dispersion flow switch.
Table providing electrical lug data for field wiring.
Continuation of the table providing electrical lug data for field wiring.
Table listing physical data for microchannel coil units.
Continuation of the table listing physical data for microchannel coil units.
Table detailing standard two-pass evaporator connection dimensions.
Continuation of table detailing standard two-pass evaporator connection dimensions.
Table detailing optional two-pass evaporator connection dimensions.
Continuation of table detailing optional two-pass evaporator connection dimensions.
Table detailing standard two-pass evaporator connection dimensions.
Table detailing optional three-pass evaporator connection dimensions.
Continuation of table detailing optional three-pass evaporator connection dimensions.
Table for selecting and locating isolators based on YVAA model designation.
Continuation of table for selecting and locating isolators.
Step-by-step instructions for installing elastomeric vibration isolators.
Details specifications for elastomeric isolators, including dimensions and weights.
Instructions for installing one inch deflection isolators.
Specifications for one inch deflection spring isolators.
Procedure for installing and adjusting two inch deflection isolators.
Specifications for two inch deflection, restrained spring isolators.
Details how to check and verify the system's refrigerant charge.
Procedure for adding oil to the compressor circuits.
Checks the chilled water flow switch installation and wiring.
Procedure for setting up the thermal dispersion flow switch.
Ensures sufficient heat load for stable operation during commissioning.
Critical protocols to prevent evaporator freeze damage and protect warranty.
Table outlining freeze damage protection requirements based on ambient temperatures.
Overview of the control panel and its keys for operation.
Description of the ON/OFF rocker switch for the entire chiller.
Explains the operator keypad functions for controlling the chiller.
Describes conditions that cause unit warnings and operator intervention.
Alert for low RTC battery voltage, potentially leading to data loss.
Details the microboard hardware, processor, and communication capabilities.
Information on using the SC-EQ card for BAS communication.
Procedure for connecting the SC-EQ card and accessing communication parameters.
List of SC-EQ BAS points for YVAA/YVFA/YAGK units.
Continuation of the SC-EQ BAS Points List.
Procedure for updating the chiller's application software.
Instructions for logging chiller operating parameters to an SD card.
Explains how unit safety faults function and how they are recorded.
Describes the fault condition when ambient temperature exceeds limits.
Describes the fault condition when ambient temperature falls below limits.
Describes the fault condition for low leaving chilled liquid temperature.
Describes the fault condition when VSD communication is lost.
Explains system safety faults, auto-reset, and lockout conditions.
Describes the software fault for high discharge pressure.
Ensures correct refrigerant level in the evaporator sight glass.
Ensures all refrigerant joints are tight using a leak detector.
Pressurizes the system with dry nitrogen to check for leaks.
Uses trace gas and a leak detector for enhanced leak detection.
Ensures power is removed from the VSD during vacuum operations.
Provides methods for evacuating and dehydrating the system.
Steps for performing the dehydration process using vacuum and heat.
Procedure for final evacuation after pressure tests and dehydration.
Critical procedure for charging the system with refrigerant.
Procedure to safely remove refrigerant from the system for service.
Procedure to verify and adjust the refrigerant charge for optimal operation.
Essential procedure for maintaining heat exchanger integrity and performance.
Details the recommended maintenance schedule for YVAA chillers.
Ensures correct heater option and ambient temp conditions to prevent freeze damage.
Summary table of recommended maintenance tasks and frequencies.
Guide for diagnosing and resolving common chiller problems.
Continuation of the troubleshooting guide for common chiller issues.
