Model YVWA Variable-Speed, Water-Cooled Screw Compressor Chillers
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Model YVWA Variable-Speed, Water-Cooled Screw Compressor Chillers

NOMINAL CAP COND TUBES* BB EVAP BC TUBES* BD BB CB BC CC BD CD CB DB CC DC CD DD DB MB DC MC DD MD MB ME MC NB MD NC ME ND NB NE NC M2 ND M3 NE M4 M2 M5 M3 N2 M4 N3 M5 N4 N2 N5 N3 N4 N5 APPLICATION S=Std Water Chiller D=Dry Tower/Radiator P=Process Brine T=Ice Thermal Storage A=Heat Pump C=Condenserless Unit STARTER A=2 CMPR Vyper Frame A B=2 CMPR Vyper Frame B C=2 CMPR Vyper Frame C D=2 CMPR Vyper Frame D J=1 CMPR Vyper Frame B L=1 CMPR Vyper Frame D PASS B=Evap: 2-pass; Cond: 1 pass C=Evap: 3-pass; Cond: 1 pass E=Evap: 2-pass; Cond: 2 pass F=Evap: 3-pass; Cond: 2 pass H=Evap: 2-pass;...

JOHNSON CONTROLS

For over 135 years, Johnson Controls has raised the bar of chiller design and customer expectations. We are raising the bar again with a leap forward in water-cooled screw compressor chiller technology. Continuing the history of innovation in both compressor design and variable speed drive (VSD) technology, Johnson Controls proudly introduces the YORK® YVWA. The YORK YVWA chillers provide superior performance. Higher efficiency heat exchangers coupled with variable speed operation and smart controls elevate the system efficiency to a whole new level. The resulting benefit from YVWA is much...

Confidence: Proven performance provides peace of mind The YVWA design is proven by years of success with the previous generation of YORK VSD water-cooled screw chillers with thousands of machines operating in more than one hundred countries. YVWA is configurable to be the perfect fit for your unique needs. YVWA offers an array of options that can be tailored and tuned to match the capacity, efficiency sound and footprint for your specific application. Several variations of condenser and evaporator arrangements, alternative compressor head ratios, sound reduction kits, and controls schemes...

Equipment Overview SEMI-HERMETIC YORK SCREW COMPRESSORS COMPLETE FACTORY PACKAGE The direct-drive, semi-hermetic rotary screw compressor incorporates advanced technology in a rugged design. The continuous function, microprocessor controlled VSD provides smooth capacity control from 100% down to 20% chiller capacity. State-of-the-art screw compressor design and manufacturing ensures optimal efficiencies at all chiller load points. With no unloading steps or slide valves in the compressor, the YVWA variable speed driven compressor has 50% fewer moving parts than fixed speed compressors with...

MicroComputer Control Center FIGURE 1 – VIEW OF CONTROL CENTER KEYPAD AND DISPLAY The microcomputer control center provides automatic control of chiller operation including compressor start/stop and load/unload anti-recycle timers, chilled liquid pump, unit alarm contacts and run signal contacts. The microcomputer control center comes online as soon as the main power switch on the unit is switched on; immediately, the microcomputer control center will begin to continuously monitor all variables. The microprocessor controls the unit’s capacity by matching the actual leaving chilled liquid...

Accessories and Options All options factory mounted unless otherwise noted. SOUND ATTENUATION The standard chiller configuration is equipped with acoustic treatments on the refrigerant lines, compressors, and oil separators. There are several sound attenuation options available to further reduce sound at its source thereby meeting local sound level regulations. HEAT EXCHANGER OPTIONS FACTORY INSULATION OF EVAPORATOR – Factoryapplied thermal insulation of the flexible, closed-cell plastic type, 3/4” (19mm) thick is attached with vapor-proof cement to the evaporator shell, flow chamber,...

250°F (-29°C to 121°C) with 1” NPT (IPS) connection for upright mounting in horizontal pipe (This flow switch or equivalent must be furnished with each unit for chilled liquid loop.). A condenser liquid flow switch is optional. (Field mounted) DIFFERENTIAL PRESSURE SWITCH – This 3-45 psig (0.2-3 barg) range switch, with 1/4” NPTE pressure connections, is an alternative to the paddle-type flow switch. (Field mounted) REFRIGERANT ISOLATION VALVES - For standard water chiller applications, optional factory-installed isolation valves in the compressor discharge line and refrigerant liquid line...

Unit Components - Front View SINGLE COMPRESSOR DUAL COMPRESSOR DESCRIPTION Control Center Oil Separator Evaporator Compact Waterbox Sight Glass Condenser Circuit Breaker Liquid Nozzles Variable Speed Drive JOHNSON CONTROLS

Unit Components - Back View SINGLE COMPRESSOR DUAL COMPRESSOR DESCRIPTION Compressor Compact Waterbox Evaporator Liquid Level Sensor Condenser Liquid Line Sight Glass Muffler 11

Dimensions - Unit TOP VIEW - SINGLE COMPRESSOR SIDE VIEW - BOTH TOP VIEW - DUAL COMPRESSOR FRONT VIEW - SINGLE COMPRESSOR FRONT VIEW - DUAL COMPRESSOR I JOHNSON CONTROLS

EVAPORATOR AND CONDENSER SHELL CODES in (mm) SINGLE 145/151 C-C D-D EVAPORATORS B & C & D 1 PASS 2 PASS 3 PASS WATER BOX DIMENSIONS in (mm) EVAPORATORS M, N CONDENSER B & C & D 2-PASS 3-PASS 1 PASS 2 PASS 3 PASS REAR HEAD 2 PASS REAR HEAD 2 PASS ADDITIONAL OPERATING HEIGHT in (mm) CLEARANCE TO FLOOR P TYPE OF CHILLER MOUNTING NEOPRENE PAD ISOLATORS 1-3/4” (44.5) SPRING ISOLATORS 1”DEFLECTION 1” (25.4) DIRECT MOUNT 3/4” (19.1) NOTES: 1. All dimensions are approximate. Certified dimensions are available on request 2. Evaporator and condenser water nozzles can be located on either end of unit....

Dimensions - Evaporators EVAPORATORS – COMPACT WATER BOXES (STANDARD) 2-PASS LEFT* FLOOR LINE *WHEN FACING THE VSD LEFT* FLOOR LINE *WHEN FACING THE VSD NOTES: 1. All dimensions are approximate. Certified dimensions are available on request. 2. Standard water nozzles are furnished with HG welded flanges. Factory-installed class 150 (HG/T20615, round slip-on forged carbon steel with 2mm raised face) water flanged nozzles are optional. Companion flanges, nuts, bolts, and gaskets are not furnished. 3. Evaporator and condenser water nozzles can be located on either end of the unit. 4. Standard...