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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B
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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 1

MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B 55 – 175 TON 195 – 615 kW 60 Hz R-410A

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 2

DESIGN SERIES REFRIGERANT = R-134a DEVELOPMENT LEVEL = B (BPHX) S = STANDARD EFFICIENCY H = HIGH EFFICIENCY FOUR DIGIT UNIT NUMBER A = AMERICAS A = AIR COOLED Approvals • SME Boiler and Pressure Vessel Code  – Section Vlll Division 1. A • AHRI Standard 550/590 and 551/591. • UL 1995  –  Heating and Cooling Equipment • SHRAE 15  –  Safety Code for Mechanical Refrigeration A • ASHRAE Guideline 3 – Reducing Emission of Halogenated Refrigerants in Refrigeration and Air-Conditioning Equipment and Systems • .E.C.  –  National Electrical Code N • OSHA  –  Occupational Safety and Health Act...

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 3

Performance data provided in this document was created in accordance with Johnson Controls software: YORKworks version 13.02 and DXCHILL version 6.04 JOHNSON CONTROLS

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 4

THIS PAGE INTENTIONALLY LEFT BLANK. JOHNSON CONTROLS

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 5

Johnson Controls, the building efficiency leader, is proud to present the YORK Model YLAA Air-Cooled Scroll Chiller. FEATURES AND BENEFITS Installation The YLAA chiller arrives as a factory-assembled package ready to be installed outdoors, either on the roof or at ground level. The air-cooled condensers eliminate the capital, installation and maintenance costs of a cooling-tower circuit. The YLAA weighs less and has s smaller footprint than other chillers in its class. In fact, it is 20-35% lighter weight than the market average chiller. When the chiller is roof-mounted in new construction,...

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 6

Introduction (Cont'd) Efficiency YLAA high-efficiency chillers, with their innovative control algorithms, offer industry-leading energy efficiency. Real-world energy efficiency is measured by IPLV (off-design) performance, and YLAA chillers provide some of the best IPLVs in their class. YLAA also offers an efficiency choice. In addition to the high-efficiency units, YLAA chillers are available in standard efficiency models with smaller footprints and lower capital costs. Only pay for the chiller you need – the multi-efficiency levels of the YLAA allow you to decide the best investment for...

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 7

Introduction (Cont'd) Communications The YLAA chiller comes standard with native communication capability for BACnet (MS/ TP), Modbus, and N2, with optional capabilities available for LON. The standard unit capabilities include built-in-scheduling, remote start-stop, remote water temperature reset and up to two steps of demand (load) limiting depending on model. The standard control panel can be directly connected to a Johnson Controls Building Automated System via the standard factory-installed RS232 communication port. Serviceability Minimal maintenance is required to keep the unit...

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 8

Equipment Overview The 55 - 175 Ton (195 - 615 kW) YLAA models are shipped complete from the factory ready for installa­ion and use. The unit is pressure-tested, evacuated, and fully charged t with a zero Ozone Depletion Potential Refrigerant R-410A and includes an initial oil charge. After assembly, a complete operational test is performed with water flowing through the evaporator to as­ ure that the refrigeration circuit operates correctly. s The unit structure is heavy-gauge, galvanized steel. This galvanized steel is coated with baked-on powder paint, which, when subjected to ASTM B117...

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 9

Equipment Overview (Cont'd) BRAZED PLATE EVAPORATOR The compact, high efficiency Brazed Plate Heat Exchanger (BPHE) is constructed with 316L stainless steel corrugated channel plates with a filler material between each plate. It offers excellent heat transfer performance with a compact size and low weight, reducing structural steel requirements on the job site. The heat exchanger is manufactured in a precisely controlled vacuum-brazing process that allows the filler material to form a brazed joint at every contact point between the plates, creating complex channels. The arrangement is...

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 10

Equipment Overview (Cont'd) CANADIAN REGISTRATION NUMBER (CRN) APPLICATION & PROOF OF CONFORMANCE Reference Table 1 for YLAA brazed plate evaporator Canadian Registration Numbers (CRN) for all Canadian Provinces. All YLAA brazed plate evaporators are categorized as pressure “H” fittings per CSA-B51. Table 1 - CANADIAN REGISTRATION NUMBERS CANADIAN PROVINCE BC AB ON PQ/MB/SK NB NS PEI NF NU NWT YU CONDENSER Coils - Condenser coils are made of a single material to avoid galvanic corrosion due to dissimilar metals. Coils and headers are brazed as one piece. Integral sub cooling is included....

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 11

Equipment Overview (Cont'd) Motors – The fans are driven by Totally Enclosed Air-Over, squirrel-cage type, current protected motors. They feature ball bearings that are double-sealed and permanently lu­ ricated. b UNIT CONTROL SYSTEM The YLAA chiller is designed with an intelligent control system that operates the chiller automatically with maximum reliability, safety and ease of use. The controls are factory tested and with as little user input as a chilled liquid setpoint the chiller will operate to meet the load demand. The control system includes native BACnet MS/TP, Modbus and N2...

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 12

Equipment Overview (Cont'd) Maximum reliability is achieved through intelligent control. Run hours and starts are averaged across all compressors automatically, and between both pumps of the optional dual pump hydro-kit. When compressors are cycled off, an anti-recycle timer ensures the motors have time to cool before starting again, for the maximum service life. At unit shutdown, the unit pumps down automatically to prevent liquid refrigerant from entering the compressors at restart, which can cause premature bearing wear and other compressor damage. Liquid temperature sensors provide...

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MODEL YLAA AIR-COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B - 13

Equipment Overview (Cont'd) • Number of compressors • Low liquid temperature cut-out • Low suction pressure cut-out • High discharge pressure cut-out • Anti-recycle timer (compressor start cycle time) • Anti-coincident timer (delay compressor starts) UNIT section to: • Set time • Set unit options In addition, the microprocessor control center is capable of displaying the following data points: • Return and leaving liquid temperature • Low leaving liquid temperature cut-out setting • Low ambient temperature cut-out setting • Outdoor air temperature • English or Metric data • Suction pressure...

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