To Next PageTo Next PageWhat to do if important configurations are not programmed correctly in York YCWL0177SE?
If important configurations are not programmed correctly, ensure that the soft start (disabled), refrigerant type (R410A), expansion valve type (thermostatic), and North American feature (enabled) are properly programmed. Failure to do so may result in damage to compressors and other system components.
Covers standards for safety and responsibility for personnel safety.
Unit must be grounded; servicing requires power isolation by trained personnel.
Describes the control center, its components, display, keypad, and functions.
Lists various programmable setpoints for unit operation and control.
Lists safeties causing auto shutdown and requiring automatic reset.
Checklist of essential items to verify before placing units in operation.
Recommendations for satisfactory operation and to avoid unit damage or warranty invalidation.
General guidelines for piping to ensure performance and avoid damage.
Field wiring must comply with NEC and local codes; avoid modifying unit controls.
Guidelines for wiring to the control panel terminal block, using screened cable.
All electrical wiring must comply with local regulations and use properly sized cables.
Requirements for single-point power supply connection, including protection.
Requirements for multi-point power supply connection with circuit breakers.
Operation of high pressure cutouts on 60 Hz and 50 Hz chillers.
Wiring diagrams for control circuits, including terminal connections.
Defines absolute voltage limitations and maximum cooler flow to prevent compressor or cooler damage.
Absolute voltage limitations that must not be exceeded to prevent serious compressor damage.
Table detailing electrical data for standard efficiency units without external overloads.
Table detailing electrical data for high efficiency units without external overloads.
Table detailing dual point electrical data with external compressor overloads.
Diagram illustrating the control circuit for a 4-compressor unit.
Diagram illustrating the control circuit for 5 and 6-compressor units.
Diagram of the power circuit for 4-compressor units with specific disconnect options.
Diagram of the power circuit for 4-compressor units with a circuit breaker.
Diagram of the power circuit for 5 and 6-compressor units.
Diagram of the power circuit for 6-compressor units.
Diagram showing the connection wiring for a 4-compressor unit.
Continuation of the connection wiring diagram for a 4-compressor unit.
Diagram showing the connection wiring for 5 and 6-compressor units.
Diagram showing the connection wiring for a 6-compressor unit.
Detailed diagram of the elementary wiring for a 4-compressor unit.
Detailed diagram of the elementary wiring for 5 and 6-compressor units.
Diagram of the elementary wiring for EEV controller on 4 and 6-compressor units.
Initial checks to be performed with the unit power switched OFF.
Procedures for checking refrigerant pressure, leak testing, and evacuation.
Verifying correct connection and tightness of power cables.
Verifying the unit's protective ground terminal connections.
Verifying site voltage supply matches unit requirements and limits.
Initial system checks before applying power.
Specific unit checks for damage, piping, leaks, valves, oil level, and pumps.
Programming and verifying cooling setpoints, program setpoints, and unit options.
Checking compressor rotation by monitoring pressures during startup.
Checking compressor rotation for system 2 after turning system 1 OFF.
Record liquid line pressure, temperature, and subcooling for each system.
Record suction temperature, pressure, saturation temperature, and superheat.
Performing leak checks on compressors, fittings, and piping.
Description of the IPU II and I/O boards, their functions, and communication.
Explains various unit status messages displayed on the screen.
Indicates discharge pressure limiting is in effect.
Indicates suction pressure limiting is in effect.
Indicates motor protector or high pressure cutout fault has occurred.
Faults causing individual systems to shut down and their reset behavior.
Unit safety indicating low leaving chilled liquid temperature.
Unit fault indicating high motor current when current feedback is used.
Categorizes status messages as faults, including system safeties and warnings.
Lists unit safeties and warning messages like low ambient and low liquid temperature.
Accesses and programs cooling setpoints for leaving or return chilled liquid.
Displays and allows setting the discharge pressure cutout for system shutdown.
Displays and allows setting the suction pressure cutout to prevent evaporator freeze-up.
Displays and allows setting the low ambient temperature cutout for unit shutdown.
Displays and allows setting the leaving liquid temperature cutout to prevent freeze-up.
Accesses cooling setpoints for display and adjustment.
Accesses and programs the daily and holiday schedule.
Accesses programmable parameters for system settings.
Navigates through and modifies user-programmable options.
How the chiller initiates start sequence and regulates cooling based on temperature.
Prevents units from reaching low-pressure cutout by limiting loading.
Unloads systems before reaching safety limits due to high load or dirty coils.
Controls leaving chilled liquid temperature to a desired setpoint within a cooling range.
Manages lead/lag systems and sequences compressors to equalize run hours and prevent short cycling.
Stages compressors based on return water temperature to match cooling load.
Manages lead/lag systems and sequences compressors to equalize run hours.
Feature to prevent unit loading beyond desired value by limiting compressor operation.
Mode to enable/disable outputs, change configuration, and view inputs.
Modifying chiller configuration like data logging, soft start, refrigerant, and expansion valve type.
Explains how to check digital inputs (ON/OFF) and analog inputs (varying DC signals).
Explains digital input voltage references and connections.
Maintenance procedures for compressors, including oil level checks and analysis.
How to check oil level in the compressor sight glass when running and at shutdown.
General
