Selection Data, Guide to Selection, Selection Rules

Selection Data

GUIDE TO SELECTION

Complete water chilling capacity ratings for YORK YCWS chillers are shown on the following pages to cover the majority of job requirements. For any application be- yond the scope of this Engineering Guide, consult your nearest YORK Office.

SELECTION RULES

1.RATINGS - YCWS 200, 230 380, 460 & 575-3-60 rat- ing are certified in accordance with ARI standard 550/ 590, at the ARI standard condition. Rating not at stan- dard ARI conditions are rated in accordance with ARI rating procedures. These ratings may be interpolated but should not be extrapolated.

2.COOLING WATER QUANTITY - Ratings are based on 10ºF chilled water range. Use the chilled water correction factors (below) for other ranges except as limited by water pressure drop, minimum or maximum water flows for the cooler.

3.CONDENSER WATER QUANTITY – Rating are ap- plicable from 2 to 4 gpm/ton as limited by water pres- sure drop or minimum or maximum water flows for the condenser. Using the tabulated MBH, the Cond. GPM is calculated as follows:

MBH x 2

Cond. GPM = Cond. Water Range (ºF)

4.FOULING FACTORS – Rating are based on 0.0001 evaporator and 0.00025 condenser fouling factor. For other fouling factors, consult the table below or con- tact your YORK representative.

EVAP FOULING FACTORS

			0.0001		x	0.00025
	Temp		Tons	Compr		Tons	Compr
Split				kW			kW
		6	0.9692	1.0015		0.9972	1.0001
8			0.9849	1.0008		0.9980	1.0001
10			1.0000	1.0000		0.9982	1.0001
12			1.0133	0.9993		0.9978	1.0001
	14		1.0248	0.9986		0.9979	1.0001

Note: Temperature split factors @ 44ºF Leaving Chilled Liquid Temp

(LCLT)

COND FOULING FACTORS

			0.00025		x	0.0005
	Temp		Tons	Compr		Tons	Compr
		Split	Tons	kW		Tons	kW
		Split		kW			kW
8			0.9998	1.0004		0.9957	1.0072
10			1.0000	1.0000		0.9959	1.0068
12			1.0001	0.9998		0.9961	1.0065
14			1.0001	0.9998		0.9965	1.0060

Note: Temperature split factors @ 95ºF Leaving Condenser Water Temp (LCWT).

METHOD OF SELECTION

If the duty requires a 10ºF range on both the cooler and condenser, see “Ratings”. For water ranges other than 10ºF, use the following procedure.

1.Determine capacity required from the following for- mula

	Capacity (tons) =	GPM x Chilled Water Range (ºF)
	Capacity (tons) =	24
		24

2.After applying any fouling factor corrections, the ac- tual condenser heat rejection may be determined as follows:

Heat Rejection (Btuh) = (Tons x 12,000) + (kW x 3415)

	Heat Rejection (MBH) =	Heat Rejection (Btuh)
	Heat Rejection (MBH) =	1000
		1000

=(Tons x 12) = (kW x 3.415)

3.Determine condensing water requirements for water cooled models as follows:

Condenser Tons =	Heat Rejection (MBH) x 1000
	15,000

Cond. Water GPM =		Condenser Tons x 30
		Condenser Water Range (ºF)

Or combine the two formulas:
Cond. Water GPM =		MBH x 2
		Condenser Water Range (ºF)

12	YORK INTERNATIONAL

YCWS specifications

York YCWS, or York Chilled Water System, represents a revolutionary approach to modern commercial cooling solutions, offering efficiency, reliability, and sustainability. Designed specifically for large-scale applications such as industrial facilities, data centers, and office buildings, the York YCWS aims to optimize energy use while maintaining climatic comfort indoors.

One of the standout features of the York YCWS is its advanced chiller technology. Utilizing cutting-edge centrifugal chillers, the system maximizes cooling through a combination of high efficiency and low operational costs. These chillers operate with variable speed drives, allowing them to adjust their output based on the real-time cooling demand. This leads to significant energy savings, especially in fluctuating load conditions, and reduces wear on the equipment, extending its lifespan.

The YCWS also incorporates smart control systems that enhance its overall performance. These controls employ algorithms to anticipate system demands, dynamically balancing the load across multiple chillers and optimizing energy use throughout the day. Integration with building management systems (BMS) allows for seamless communication and remote monitoring, giving facility managers greater oversight and control over their cooling operations.

Sustainability is at the core of the York YCWS design. The system uses environmentally friendly refrigerants that comply with global standards for reducing greenhouse gas emissions. Additionally, the modular design of the chiller units allows for easy upgrades and expansions, accommodating growing cooling needs without necessitating a complete system overhaul. This flexibility supports a more energy-efficient and environmentally responsible operational model.

The system's footprint is relatively compact, allowing it to fit into tighter spaces typically found in urban settings. Furthermore, the YCWS is engineered for quiet operation, minimizing noise disturbances for occupants in and around the building.

Reliability is another key characteristic of the York YCWS. With a focus on durability and performance, these systems are built to function optimally in various environmental conditions. The robust construction and high-quality materials ensure long-term service, reducing the need for frequent maintenance and associated costs.

In summary, the York YCWS is not just a cooling solution but a comprehensive system that embodies modern engineering principles. Its efficiency, sustainability, and adaptability make it a preferred choice for industries looking to invest in their future. With its smart technologies and robust features, the York Chilled Water System is well-equipped to meet the demanding needs of today's commercial cooling challenges.

York YCWS manual Selection Data, Guide to Selection, Selection Rules, Cond Fouling Factors

Models: YCWS