quickspecs-chiller solutions york yvaa air-cooled screw chillers

18
CONFIDENTIAL – FOR INTERNAL USE ONLY QuickSpecs YORK Air-cooled Screw Chiller (Model YVAA) From Customer Need to Competitive Advantage Version 1.0 – November 2010

Upload: kdpmansi

Post on 28-Dec-2015

58 views

Category:

Documents


3 download

DESCRIPTION

Specs Yourk Chiller

TRANSCRIPT

Page 1: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY

QuickSpecsYORK Air-cooled Screw Chiller (Model YVAA)

From Customer Need to Competitive AdvantageVersion 1.0 – November 2010

Page 2: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY

The Bottom Line ........................................................................................................................................... 1

The Bottom Line 1-6 .................................................................................................................................... 2

The Details .................................................................................................................................................... 4

QuickSpec 1: Energy Efficiency.................................................................................................................... 5

QuickSpec 2: Confidence.............................................................................................................................. 6

QuickSpec 3: LEED Energy and Atmosphere Credit 4 – Enhanced Refrigerant Management.................. 8.

QuickSpec 4: Acoustics ............................................................................................................................. 10

QuickSpec 5: Variable Primary Flow (VPF) ................................................................................................12

QuickSpec 6: Electrical Requirements ...................................................................................................... 14

This.QuickSpec.document.is.designed.to.help.Johnson.Controls.HVAC.salespeople.work.with.their.Consulting.

Engineer.customers.and.help.them.to.specify.YVAA.Projects.efficiently.and.effectively...Each.QuickSpec.item.

summarizes.an.advantage.that.should.be.included.in.the.project.specifications.in.order.to.ensure.the.owner.

receives.the.full.benefit.of.the.features.included.with.YORK.Air-cooled.Screw.Chillers.(Model.YVAA.)

Table of Contents

QuickSpecsYORK Air-cooled Screw Chiller (Model YVAA)

Page 3: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 1

Return to Table of Contents

This.section.tells.you.what.specific.language.should.be.included.in.the.project.specification.in.order.to.ensure.that.the.owner.receives.the.full.benefit.of.the.features.of.YORKYVAA.Air-cooled.Screw.Chillers.

The Bottom Line

Page 4: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 2

Bottom Line 1:.•..Provide.chiller.with.highest.part.load.efficiency.(IPLV.or.NPLV).while.meeting.or.exceeding.

ASHRAE.90.1.full.load.efficiency.standards..

•..Provide.variable.speed.driven.chiller.compressors.with.both.VSD.and.compressor.designed,.

manufactured,.and.installed.in.the.chiller.by.the.chiller.manufacturer.

.

Bottom Line 2:.•..Provide.VSD.chiller.from.manufacturer.who.specializes.in.the.design.and.manufacture.of.

product.specified.and.who.has.a.minimum.of.five.(5).years.of.experience.in.supplying.VSD.

air-cooled.chillers..

•..Provide.VSD.chiller.with.both.VSD.and.compressor.designed,.manufactured,.and.installed.in.

the.chiller.by.chiller.manufacturer..

.

Bottom Line 3:.•..Provide.chiller.that.meets.the.EA.Credit.4.requirement.and.helps.the.project.earn.the..

EA.Credit.4.

•..Schedule.the.chiller.Refrigerant.charge.to.require.low.amount.equal.or.less.than.that..

of.YVAA.

.

Bottom Line 4:.•..Provide.chiller.with.sound.power.and.sound.pressure.level.data.in.decibels.(dB).at.the.

scheduled.eight.(8).octave.band.center.frequencies..

•..Provide.chiller.with.sound.power.and.sound.pressure.level.data.at.100%,.75%,.50%,.and.

25%.load.

•..Provide.chiller.with.sound.power.and.sound.pressure.levels.not.exceeding.scheduled.values.

at.any.load.point.and.in.any.octave.band..Manufacturer.shall.provide.additional.sound.

attenuation.components.as.needed.to.comply.with.the.quietest.sound.levels.scheduled.at.

all.load.points.

•..Provide.chiller.with.acoustical.performance.ratings.in.accordance.with.AHRI.370..

.

The Bottom Line 1-4

Return to Table of Contents

Page 5: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 3

Bottom Line 5:.•..Provide.chiller.capable.of.reliable.operation.in.a.variable.primary.flow.system..Chiller.shall.

operate.stably.with.up.to.a.10%.per.minute.evaporator.flow.rate.of.change.

•..Provide.chiller.with.minimum.evaporator.flow.rate.equal.to.or.less.than.scheduled.value.

•..Provide.chiller.with.variable.speed.driven.compressors.to.react.quickly.to.flow.rate.change..

•..Provide.chiller.with.controls.to.prevent.freezing.in.the.evaporator.upon.rapid.loss.of.flow.

•..Continuously.monitor.and.control.flow.rate.through.each.evaporator.via.the.building.

automation.system.(BAS.).The.BAS.shall.maintain.the.minimum.evaporator.flow.rate.(or.

higher).through.each.running.chiller.

.

Bottom Line 6:.•. Provide.chiller.with.MCA.no.higher.than.scheduled.

•..Provide.chiller.with.zero.inrush.current..

•..If.proposed.chiller.exceeds.scheduled.MCA.or.has.higher.than.zero.inrush.current,.the.

Mechanical.Contractor.shall.coordinate.with.Architect,.General.Contractor,.Electrical.

Engineer.and.Electrical.Contractor.regarding.electrical.service.increase..

•..Provide.chiller.with.a.minimum.power.factor.of.0.95.at.all.chiller.operating.points..If.not.

inherent.to.chiller.electrical.design,.manufacturer.shall.provide.power.factor.correction.

capacitors.capable.of.achieving.0.95.power.factor.at.all.chiller.operating.points.

•..Provide.chiller.with.Single.Point.Power.Connection.

The Bottom Line 5-6

Return to Table of Contents

Page 6: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 4

The Details

This.section.tells.you.the.background.and.peripheral.information.pertinent.to.each.individual.“Bottom.Line”.QuickSpec.item,.including:

•..The.customer.need,.including.a.sample.of.how.the.customer.would.actually.say.it

•.The.feature.that.addresses.the.stated.need

•..A.“So.what”.statement.highlighting.the.feature’s.value..and.impact

•.The.competitive.advantage.the.feature.provides

•..The.Bottom.Line:.What.specific.language.should.be.included.in.the.project.specification

Return to Table of Contents

Page 7: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 5

What customers are saying: “I.need.low.energy.costs.without.sacrificing.comfort.in.my.building..Load.shedding.is.not.an.option.for.us.”

Customer Need: A.chiller.that.is.efficient.at.“real.world.conditions”.and.optimized.to.perform.most.efficiently.at.off-design.conditions.–.less.than.full.load.and/or.less.than.design.ambient.conditions..

YVAA feature:.A.combination.of.state.of.the.art.technologies.on.compressors,.heat.exchangers.(evaporator.and.condenser),.condenser.fans,.and.chiller.controls.that.deliver.the.highest.off-design.efficiencies.in.its.class..YVAA.technologies.include:

•.Variable.speed.screw.compressors.with.variable.speed.drives..•.Hybrid.falling.film.type.evaporator.for.optimal.efficiency.and.refrigerant.charge..•.Microchannel.type.condenser.for.maximum.heat.transfer..•.Optional.condenser.fans.with.variable.speed.drives.for.even.higher.chiller.part.load.efficiency.•..Optimized.part.load.control.software.that.allows.the.chiller.to.achieve.the.highest.part.load.efficiency.in.its.class..

•..A.chiller.designed.to.deliver.superior.efficiencies.at.off-design.ambient.temperatures.regardless.of.chiller.load.

YVAA.chillers.can.deliver.premium.part.load.efficiency.(IPLV.or.NPLV).while.meeting.or.exceeding.ASHRAE.90.1.full.load.efficiency.standards..

So what:.The.average.air-cooled.chiller.operates.at.part.load.and.off-design.ambient.temperatures.99%.of.the.time..Chillers.with.variable.speed.driven.compressors.are.able.to.take.advantage.of.both.the.lower.loads.and.lower.ambient.temperatures.more.than.constant.speed.compressors,.which.allows.for.superior.chiller.efficiency.99%.of.the.time.the.chiller.is.in.operation..Therefore.a.chiller.optimized.for.part.load.efficiency.and.off-design.ambient.temperatures.will.have.the.biggest.positive.impact.on.total.energy.use.and.costs.

Our competitive advantage:.The.YVAA.chiller,.when.equipped.with.options,.is.the.most.efficient.chiller.in.its.class.

What to specify:•..Provide.chiller.with.highest.part.load.efficiency.(IPLV.or.NPLV).while.meeting.or.exceeding.ASHRAE.90.1.full.load.efficiency.standards..

•..Provide.variable.speed.driven.chiller.compressors.with.both.VSD.and.compressor.designed,.manufactured,.and.installed.in.the.chiller.by.the.chiller.manufacturer.

QuickSpec 1: Energy Efficiency

Return to Table of Contents

Return to the Bottom

Line 1-4

Page 8: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 6

QuickSpec 2: Confidence

Return to the Bottom

Line 1-4

What customers are saying: “I.want.the.performance.benefits.of.VSD.technology.in.an.air-cooled.chiller.but.

I.cannot.afford.to.pay.too.much.or.risk.reliable.operation..I.also.need.the.chiller.to.be.backed.up.by.an.equally.

reliable.service.organization.”

Customer Need:.An.air-cooled.chiller.supplier.with.a.proven.track.record.of.engineering,.manufacturing,.and.

supplying.variable.speed.driven.air-cooled.chillers;.with.a.service.team.that.is.well.trained.and.experienced.in.

VSD.air-cooled.chillers.and.VSD.equipment..

YVAA feature: The.same.variable.speed.driven.compressors.used.on.YCAV/YCIV.since.2004..Compressors.

that.have.been.designed.and.optimized.for.variable.speed.control..YORK-engineered.VSD.that.is.specifically.

designed.for.air-cooled.chillers..Dedicated.purpose.motors.that.have.been.designed.and.qualified.to.operate.

with.our.own.VSD.design.and.compressor.across.the.full.range.of.operating.frequencies..All.moving.parts,.

springs,.and.fittings.associated.with.slide.valves,.used.in.constant.speed.compressors,.have.been.eliminated.

from.the.YVAA.compressor..

The.JCI.service.organization.has.been.performing.start-up,.maintenance,.and.service.on.the.YORK.VSD.

air-cooled.chillers.since.2004..In.addition,.local.service.technicians.have.received.and.continue.to.receive.

customized.training.on.VSD.air-cooled.chillers.and.VSD.equipment.

So what: Customer.confidence.in.the.products.supplied.tops.any.other.requirement..The.VSD.and.compressor.

used.in.YVAA.have.been.in.operation.since.2004..Only.JCI/YORK.can.offer.this.level.of.experience.to.our.

customers..As.a.matter.of.fact,.most.air-cooled.chiller.manufacturers.still.cannot.offer.VSD.air-cooled.chillers..

Even.those.who.have.recently.started.offering.VSDs.offer.them.at.a.high.price.tag.and.do.not.have.the.level.of.

expertise.or.experience.that.JCI/YORK.has..

The.years.of.experience.JCI/YORK.has.in.supplying.VSD.air-cooled.chillers.offers.the.customer.the.peace.of.

mind.needed.when.purchasing.a.YVAA.chiller..

Return to Table of Contents

Page 9: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 7

Our competitive advantage:.In.2004,.YORK.launched.the.first.VSD.air-cooled.screw.chiller.in.the.market..

Since.then,.JCI/YORK.has.delivered.over.two.million.tons.(seven.million.kilowatts).of.cooling.through..

air-cooled.chillers.that.are.solely.VSD.controlled..The.standard.VSD.feature.on.all.YORK.air-cooled.screw.

chillers.allows.for.compressor.design.optimization.and.provides.economies.of.scale,.which.allows.the..

YORK.chiller.to.have.a.significantly.short.payback.period..This.rich.history.of.utilizing.VSD.technology.on..

air-cooled.chillers.allows.for.the.YVAA.chiller.to.be.the.customers’.number.one.choice.in.reliability.and..

cost-effectiveness.

What to specify:

•..Provide.VSD.chiller.from.manufacturer.who.specializes.in.the.design.and.manufacture.of.product.specified.

and.who.has.a.minimum.of.five.(5).years.of.experience.in.supplying.VSD.air-cooled.chillers..

•..Provide.VSD.chiller.with.both.VSD.and.compressor.designed,.manufactured,.and.installed.in.the.chiller.by.

chiller.manufacturer..

QuickSpec 2: Confidence(continued)

Return to the Bottom

Line 1-4

Return to Table of Contents

Page 10: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 8

What customers are saying: “I.want.a.chiller.that.can.help.my.LEED.project.qualify.for.the.Energy.&.

Atmosphere.Credit.4,.Enhanced.Refrigerant.Management.”

Customer need:.A.chiller.with.the.lowest.charge.of.environmentally.responsible.refrigerant.to.help.the.

HVAC&R.system.earn.the.Energy.&.Atmosphere.Credit.4.(EA.Credit.4.)

YVAA feature: HFC-134a.refrigerant.has.an.Ozone.Depletion.Potential.(ODP).of.zero.and.a.low.Global.Warming.

Potential.(GWP).of.1320..In.addition,.YVAA.utilizes.state.of.the.art.heat.exchanger.technologies.in.the.evaporator.

and.condenser.that.require.minimal.refrigerant.charge.and.allow.the.chiller.to.meet.the.EA.Credit.4.requirement.

So what:.Earning.EA.Credit.4.helps.a.project.obtain.LEED.certification..The.lower.the.Refrigerant.charge.of.

the.chiller,.the.more.the.chiller.is.able.to.offset.other.refrigeration.equipment.in.the.EA.Credit.4.calculation..

In.order.for.the.entire.HVAC&R.system.to.earn.EA.Credit.4,.the.Average.Refrigerant.Atmospheric.Impact.

must.be.less.than.or.equal.to.100.per.the.following.formula:

[.∑.(((GWPr.x.(Lr.x.Life.+.Mr).x.Rc)./.Life).+.(LCODP.x.105)).x.Qunit.]./.Qtotal.≤.100

GWPr.(1320),.Lr.(2%),.Life.(23),.Mr.(10%),.and.LCODP.(0).are.all.preset.for.R-134a..This.leaves.Rc.(Refrigerant.

charge.in.pounds.per.ton).as.the.major.contributing.factor.to.the.calculation..The.lower.the.Rc,.the.lower.the.

Refrigerant.Atmospheric.Impact.of.the.chiller..

In.a.single.chiller.plant,.the.impact.is.straight.forward.where.the.chiller.simply.either.meets.EA.Credit.4.

or.not..It.is.common,.however,.to.see.HVAC&R.systems.with.a.mix.of.split.and.packaged.units,.data.and.

telecommunication.room.cooling.units,.and.multiple.chiller.types.that.use.different.type.refrigerants..In.

this.case,.the.individual.chiller.Refrigerant.Atmospheric.Impact.becomes.more.critical..The.low.Refrigerant.

Atmospheric.Impact.for.one.chiller.might.help.offset.the.high.Refrigerant.Atmospheric.Impact.of.another.

refrigeration.product.in.the.HVAC&R.system.and.help.the.project.earn.the.EA.Credit.4..

QuickSpec 3: LEED Energy and Atmosphere Credit 4 - Enhanced Refrigerant Management

Return to the Bottom

Line 1-4

Return to Table of Contents

Page 11: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 9

Competitive advantage:.The.Refrigerant.charge.(Rc).in.the.YVAA.is.among.the.lowest.in.its.class..This.

allows.the.YVAA.not.only.to.meet.the.EA.Credit.4.requirement,.but.also.to.lower.the.HVAC&R.system.

Average.Refrigerant.Atmospheric.Impact,.which.helps.the.project.earn.EA.Credit.4..

What to specify:

•..Provide.chiller.that.meets.the.EA.Credit.4.requirement.and.helps.the.project.earn.the.EA.Credit.4.

•..Schedule.the.chiller.Refrigerant.charge.to.require.low.amount.equal.or.less.than.that.of.YVAA.

Return to the Bottom

Line 1-4

QuickSpec 3: LEED Energy and Atmosphere Credit 4 - Enhanced Refrigerant Management

(continued)

Return to Table of Contents

Page 12: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 10

What customers are saying:.“I.need.a.quiet.chiller.that.won’t.bother.people.in.the.building.or.my.neighbors,.

particularly.at.night,.so.I.don’t.violate.neighborhood.noise.ordinances.”

Customer need:.A.chiller.that.is.quiet.at.all.times.with.the.flexibility.to.reduce.noise.further.during.certain.

times.of.its.operation..

YVAA features:.Unlike.constant.speed.compressors,.variable.speed.driven.compressors.have.lower.sound.

levels.at.lower.chiller.loads..The.YVAA.chiller.comes.standard.with.variable.speed.driven.compressors,.

acoustical.treatment.on.major.noise.source.components,.and.low-noise.fans.

Similar.to.compressors,.variable.speed.driven.condenser.fans.have.lower.sound.levels.at.lower.speeds..

An.option.for.low-noise.fans.with.VSDs.helps.further.reduce.chiller.sound.levels.when.part.load.sound.is.

important..When.sound.levels.at.part.load.and.full.load.are.equally.important,.the.optional.ultra-quiet.fans.

with.VSDs.offer.maximum.noise.reduction.at.all.load.points..Additionally,.multiple.factory.installed.options.for.

sound.attenuation.are.available..

The.Silent.Night™.patented.control.algorithm.is.another.noise.reduction.option.that.is.offered.on.the.YVAA.

chiller..Silent.Night™.allows.the.Building.Automation.System.(BAS).to.control.chiller.load.shedding.(by.limiting.

compressor.speed).to.achieve.low.target.sound.levels.at.times.when.chiller.sound.is.more.critical.than.chilled.

liquid.temperature.set.point..

So what:.Air-cooled.chillers.are.often.used.in.sound.sensitive.locations.such.as,.buildings.in.residential.

neighborhoods.and.zones.with.acoustic.limits..In.most.cases,.the.acoustical.limits.vary.during.a.24-hour.time.

period..The.most.stringent.sound.requirements.could.be.at.night.when.background.noise.is.at.its.minimum..

This.is.when.the.chiller.is.running.at.off-design.conditions.and.VSDs.will.help.lower.chiller.sound.levels...

QuickSpec 4: Acoustics

Return to the Bottom

Line 1-4

Return to Table of Contents

Page 13: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 11

Competitive advantage:.Johnson.Controls.understands.that.every.job.is.different.in.its.acoustical.

requirements.and.limits,.and.that.customers.rely.on.the.manufacturer.to.offer.a.custom.solution.for.chiller.

noise.reduction.that.fits.the.particular.job.site.needs..The.YVAA.is.one.of.the.quietest.chillers.in.its.class..

Unlike.constant.speed.compressors,.YVAA.variable.speed.driven.compressors.get.quieter.at.off-design.

conditions.where.chillers.run.99%.of.their.time..In.addition,.the.YVAA.offers.a.variety.of.noise.reduction.

options.that.are.designed.for.different.acoustical.requirements.and.when.applied.offer.the.best.solution.and.

value.to.the.customer..

What to specify:

•..Provide.chiller.with.sound.power.and.sound.pressure.level.data.in.decibels.(dB).at.the.scheduled.eight.(8).

octave.band.center.frequencies..

•..Provide.chiller.with.sound.power.and.sound.pressure.level.data.at.100%,.75%,.50%,.and.25%.load..

•..Provide.chiller.with.sound.power.and.sound.pressure.levels.not.exceeding.scheduled.values.at.any.load.point.

and.in.any.octave.band..Manufacturer.shall.provide.additional.sound.attenuation.components.as.needed.to.

comply.with.the.quietest.sound.levels.scheduled.at.all.load.points.

•.Provide.chiller.with.acoustical.performance.ratings.in.accordance.with.AHRI.370..

QuickSpec 4: Acoustics

(continued)

Return to the Bottom

Line 1-4

Return to Table of Contents

Page 14: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 12

What customers are saying:.“I.want.to.save.system/pump.energy.by.varying.chilled.liquid.flow.but.want.

assurance.that.I.won’t.have.the.control.problems.I’ve.had.with.Primary/Secondary.pumping.systems.”

Customer need:.A.chilled.liquid.system.that.can.vary.flow.through.the.chillers.without.sacrificing.reliability,.

stability,.or.performance.

YVAA feature:.Standard.variable.speed.driven.compressors.that.can.modulate.quickly.and.efficiently.to.

match.change.in.load..Innovative.and.proprietary.chiller.controls.using.advanced.logic.that.allows.variable.

evaporator.flow.while.maintaining.reliability,.stability,.and.performance.

So what:.A.traditional.Primary/Secondary.chiller.plant.is.designed.to.maintain.the.design.chilled.liquid.flow.

rate.constant,.regardless.of.chiller.load.point..However.when.the.average.air-cooled.chiller.runs.part.loaded.

99%.of.the.time,.such.a.system.runs.with.more.flow.than.required.for.the.cooling.load,.using.more.pump.

energy.than.necessary..

A.Variable.Primary.Flow.(VPF).system.is.designed.to.reduce.the.chilled.liquid.flow.to.match.the.building.

demand..The.reduction.in.chilled.liquid.flow.by.varying.pump.speed.saves.energy.on.the.chilled.liquid.pump.

without.affecting.energy.of.other.system.components..

Competitive advantage:.The.YVAA.has.one.of.the.lowest.minimum.liquid.flow.rates.in.its.class..In.a.

Variable.Primary.Flow.system,.this.means.the.YVAA.chiller.has.better.chilled.liquid.system.turn.down.than.

the.competition..This.allows.the.variable.speed.driven.pumps.to.run.at.lower.speeds,.which.results.in.further.

pump.energy.savings.and.yields.a.more.efficient.chilled.liquid.system..

The.YVAA.leverages.Johnson.Controls’.combined.systems.expertise.in.controls.and.equipment.to.help.

customers.successfully.apply.VPF.in.their.buildings.

QuickSpec 5: Variable Primary Flow (VPF)

Return to the Bottom

Line 5-6

Return to Table of Contents

Page 15: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 13

What to specify:

.•..Provide.chiller.capable.of.reliable.operation.in.a.variable.primary.flow.system..Chiller.shall.operate.stably.

with.up.to.a.10%.per.minute.evaporator.flow.rate.of.change.

•..Provide.chiller.with.minimum.evaporator.flow.rate.equal.to.or.less.than.scheduled.value.

•..Provide.chiller.with.variable.speed.driven.compressors.to.react.quickly.to.flow.rate.change..

•..Provide.chiller.with.controls.to.prevent.freezing.in.the.evaporator.upon.rapid.loss.of.flow.

•..Continuously.monitor.and.control.flow.rate.through.each.evaporator.via.the.building.automation.system.

(BAS.).The.BAS.shall.maintain.the.minimum.evaporator.flow.rate.(or.higher).through.each.running.chiller.

QuickSpec 5: Variable Primary Flow (VPF)

(Continued)

Return to the Bottom

Line 5-6

Return to Table of Contents

Page 16: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 14

What customers are saying:.“I.want.a.chiller.that.gives.me.design.capacity.but.doesn’t.require.a.huge.

electrical.service,.or.an.oversized.emergency.generator..I.also.need.a.chiller.with.a.high.power.factor.

because.my.electrical.utility.charges.fees.for.low.power.factor.”

Customer need:.A.chiller.with.the.following:

•.Low.Minimum.Circuit.Ampacity.(MCA).to.keep.electrical.service.small.

•.Zero.inrush.current.on.start.up.to.avoid.the.need.for.oversized.backup.generators.

•.High.power.factor.throughout.the.full.operating.range.of.the.chiller.

•.Single.Point.Power.Connection.to.reduce.field.labor.and.installation.time..

YVAA feature: Low.MCA.allows.minimum.possible.electrical.service..VSD.provides.zero.inrush.current..0.95.

displacement.power.factor.across.entire.chiller.operating.range..Single.Point.Power.Connection.standard.

feature.

So what: The.YVAA.has.the.best.combination.of.electrical.properties.of.any.chiller.in.its.class..The.low.

MCAs.allow.the.maximum.capacity.chiller.to.be.installed.in.existing.buildings.without.changing.existing.

electrical.service,.or.allow.the.smallest.possible.electrical.service.to.be.designed.in.new.buildings,.keeping.

first.costs.low..Zero.inrush.current.keeps.emergency.generators.small.which.reduces.first.cost..Some.utility.

companies.charge.fees.to.customers.with.low.power.factors.or.offer.rebates.for.high.power.factors..

Competitive advantage: The.MCAs.on.YVAA.chillers.are.the.lowest.in.its.class..Zero.inrush.current.allows.

for.the.smallest.possible.emergency.generators..Competitors’.chillers.with.any.other.type.starters.will.have.

inrush.current.spikes.that.can.drive.up.generator.sizes..The.YVAA’s.0.95.displacement.power.factor.is.

constant.across.the.entire.operating.range..Competitors’.chillers.with.slide.valves.for.capacity.control.have.

low.power.factors.at.part.loads,.where.chillers.run.most.of.the.time..Even.with.power.factor.correction.

capacitors,.competitors.will.still.have.lower.power.factors.at.off-design.conditions,.resulting.in.the.customer.

still.getting.charged.for.low.power.factors.much.of.the.time.

QuickSpec 6: Electrical Requirements

Return to the Bottom

Line 5-6

Return to Table of Contents

Page 17: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLY 15

What to specify:

•. Provide.chiller.with.MCA.no.higher.than.scheduled.

•..Provide.chiller.with.zero.inrush.current..

•..If.proposed.chiller.exceeds.scheduled.MCA.or.has.higher.than.zero.inrush.current,.the.Mechanical.

Contractor.shall.coordinate.with.Architect,.General.Contractor,.Electrical.Engineer.and.Electrical.Contractor.

regarding.electrical.service.increase..

•..Provide.chiller.with.a.minimum.power.factor.of.0.95.at.all.chiller.operating.points..If.not.inherent.to.chiller.

electrical.design,.manufacturer.shall.provide.power.factor.correction.capacitors.capable.of.achieving.0.95.

power.factor.at.all.chiller.operating.points.

•..Provide.chiller.with.Single.Point.Power.Connection.

QuickSpec 6: Electrical Requirements

Return to the Bottom

Line 5-6

Return to Table of Contents

Page 18: QuickSpecs-Chiller Solutions YORK YVAA Air-Cooled Screw Chillers

CONFIDENTIAL – FOR INTERNAL USE ONLYCONFIDENTIAL – FOR INTERNAL USE ONLY

©.Copyright.2010by.Johnson.Controls,.Inc.Milwaukee,.Wisconsin

All.rights.reserved.Printed.in.U.S.A.

Johnson.Controls,.Inc.507.East.Michigan.StreetMilwaukee,.WI.53202

Return to Table of Contents