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You can also force a single schedule, or all schedules, into the temporary occupancy state from the UI. This action places all members of the schedule into temporary occu- pancy. Members of the schedule can be a Group of zones or one or more CV RTUs. Again, when the time-out period expires, the members return to their normal occu- pancy schedule.

You can change the temporary occupancy time-out delay. Its range is from 15 to 240 minutes, with a default value of 120 minutes. You can also cancel temporary occu- pancy at any time from the UI.

To indicate which schedules (if any) are temporarily occupied, view the Schedules Summary on the System Manager or Coordinator. The Zone Status screen indicates whether a particular zone is temporarily occupied.

All Schedules - Temporary Occupancy

This option places all schedules under temporary occupancy. This function is the same as if just one schedule was under temporary occupancy. The same duration applies: 15 to 240 minutes.

Exception Schedules

You can add exception schedules throughout the year to accommodate holidays and other periods of time that require different scheduling. Each exception schedule can be for a single or reoccurring event, such as once every year. The exception replaces the complete weekly schedule for the day it is active. Two sets of occupied and unoccu- pied times can be defined per exception schedule.

Global and Instant Shutdown

The Global Shutdown function shuts down the entire system from the System Man- ager. This command shuts down all Coordinators and CV RTUs that report to the Sys- tem Manager. An enable function is also available to re-enable the entire system.

The Instant Shutdown function shuts down a single Coordinator, CV RTU, or IOM. Shutting down a coordinator also shuts down all of its zones. An enable function is also available to re-enable a single system.

Trend Data Collection

The System Manager and Coordinator keep records of the changing values of points in the system. You can view these values on a Trend report. The System Manager or Coordinator collects one sample every 15 minutes over the past 72 hours for the fol- lowing values:

•Zone temperature

•Supply or discharge air temperature

•Return air temperature

•Outside air temperature

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System Manager/Zone Coordinator User’s Manual

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York YK-ZCU2x0-0, YKSMU2x0-0 Global and Instant Shutdown, Trend Data Collection, All Schedules Temporary Occupancy
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YK-ZCU2x0-0, YKSMU2x0-0, YK-ZCU4x0-0 specifications

York YK chillers are known for their reliability, efficiency, and advanced technology, making them a popular choice for a wide range of commercial applications. Among the various models, the YK-ZCU4x0-0, YKSMU2x0-0, and YK-ZCU2x0-0 stand out for their innovative features and performance capabilities.

The YK-ZCU4x0-0 is designed to offer maximum cooling capacity while maintaining energy efficiency. One of its main features is the variable speed drive technology, which allows for precise control of the compressor speed based on real-time cooling demands. This technology not only enhances energy savings but also reduces wear and tear on components, extending the unit's lifespan. Additionally, the YK-ZCU4x0-0 is equipped with advanced microchannel heat exchanger technology, enabling better heat transfer and smaller refrigerant charges, which contributes to its lower environmental impact.

The YKSMU2x0-0 model is particularly notable for its integrated controls and monitoring systems. This chiller comes with a user-friendly touch screen interface that allows operators to monitor performance metrics and make adjustments with ease. The model features an intelligent control system that optimizes operational efficiency by adapting to changing load conditions. Moreover, its robust design makes it suitable for diverse applications, from data centers to manufacturing facilities, where reliability is crucial.

Finally, the YK-ZCU2x0-0 emphasizes modular design, which allows for easy installation and scalability. Its compact footprint makes it suitable for spaces with limited installation area. This model also supports modular redundancy, ensuring that if one module experiences issues, others can take over without disruption to the cooling process. The combination of high-efficiency performance, modularity, and state-of-the-art features makes the YK-ZCU2x0-0 an attractive option for facility managers looking for dependable chillers.

In summary, the York YK-ZCU4x0-0, YKSMU2x0-0, and YK-ZCU2x0-0 chillers represent the forefront of cooling technology, offering advanced features that cater to energy efficiency, flexibility, and operational reliability. Whether needing a robust solution for cooling large industrial spaces or a more compact unit for specific applications, these models provide the versatility and performance required in today's demanding environments.
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