
100.210-IOM (FEB 2015)
Page 28
VYPER
™
VARIABLE SPEED DRIVE
INSTALLATION
TABlE 9 – DIgITAl ConTrol SIgnAl WIrE rECommEn-
DATIonS
Recommended Digital Signal Wire
Unshielded Per.US.NEC.or.applicable.electrical.code.
Shielded
18AWG.(0.750.mm
2
),.3.conductor,.shielded.
ELECTRICAL WIRING CONDUIT
All.Vyper
™
.power.and.control.wiring.must.be.contained.in.
suitable.metallic.conduit.and.separated.by.system/compo-
nent.as.follows:
•. Compressor.motor.wiring
•. Oil.pump.motor.wiring
•. Compressor.motor.cooling.fan.power.wiring
•. Control.wiring.between.the.Quantum
™
LX.panel.and.the.
Vyper
™
•. System.Analog.and.Communications.wiring
TRANSFORMERS
NOTICE
Use only K-4 Standard rated transformers.
In.most.installations,.the.transformer.that.supplies.the.refrig-
eration.equipment.is.the.same.transformer.that.powers.most.
of.the.other.loads.in.the.same.building..These.transformers.
are.generally.very.large.relative.to.the.refrigeration.load...
In.some.cases.there.will.be.an.individual.transformer,.sized.
and.dedicated.to.the.refrigeration.system.alone..For.example,.
when.a.460.VAC.VSD.is.used.and.the.existing.power.is.208V,.
a.208.V.to.460V.step-up.transformer.should.be.installed.
Dedicated.transformers.must.be.specially.sized.for.Vyper
™
.
applications.. Failure. to. properly. size. the. transformer. may.
result.in.unreliable.operation..
NOTICE
Contact the factory or power provider for
transformer sizing.
When.installing.a.Vyper
™
.on.an.existing.transformer,.the.total.
Kilovolt-amps.(kVA).requirement.of.the.VSD.controlled.system.
and.all.branch.circuits.must.be.considered..Size.the.trans-
former.supplying.the.Vyper
™
.so.that.the.transformer.voltage.
does.not.sag.more.than.5%.when.subjected.to.load.excursions...
The.steady-state.operating.voltage.should.be.within.the.range.
of.414.to.508.VAC,.3.phase.60.hz,.or.342-423.VAC,.3.phase,.
50.hz...Refer.to.Table.10.for.transformer.ratings/sizes.
Johnson.Controls.offers.a.line.of.recommended.Vyper.VSD.
Transformers..These.transformers.have.the.following.fea-
tures:
•. Steel.core.for.low.flux.density.operation.
•. Standard.K-4.rating..K-13,.K-20,.K-30.is.available.as.an.
option.
•. UL./.CSA.certified.
•. 600.Volt.class
•. Primary.Voltage:.208V,.230V,.460V,.575V
•. Conductors,.40°C.ambient
•. Sinusoidal.loading.not.to.exceed.K-4
•. Secondary.Voltage:.460
•. NEMA.2.housing
•. 60.hz,.150°C.temperature.rise,.220°C.insulation
•. Taps:.1.plus,.1.minus@5%
TABlE 10 – rECommEnDED TrAnSFormEr SIzES
kVA
Impedance
Weight (lb)
175
5%-6%
1100
220
5%-6%
1470
275
5%-6%
1750
330
5%-6%
1990
440
5.5% - 6.5%
2700
550
5.5% - 6.5%
3100
660
5.5% - 6.5%
3600
750
6% - 7%
4600
880
6% - 7%
5300
990
6% - 7%
5800
1250
6.5% - 7.5%
6200
1500
6.5% - 7.5%
6800
1750
6.5% - 7.5%
7500
2000
6.5% - 7.5%
8200
POWER FACTOR CAPACITORS
Power.factor.correction.capacitors.are.not.required.since.the.
Vyper™.has.a.0.95.minimum.power.factor.at.all.operational.
loads.and.conditions..Capacitors.can.be.located.at.one.or.
several.places.on.a.distribution.system.and.solid-state.motor.
controllers.may.not.run.or.have.difficulty.starting.units.with.
this.scenario..The.severity.of.the.malfunction.depends.on.the.
size.of.the.capacitors,.the.distance.away.for.the.solid-state.
controls,.and.the.size.of.the.building.supply.transformer.
In.Variable.Speed.Drive.(VSD).applications,.there.is.no.way.to.
know.in.advance.whether.the.capacitors.will.cause.interfer-
ence..When.a.VSD.is.started.and.there.are.problems.caused.
by.power.factor.capacitors;.the.capacitors.require.removal...
Note.that.in.some.installations,.capacitors.are.switched.on-
line.as.the.power.factor.drops.
The.switching.transients.created.by.connecting.and.discon-
necting.power.factor.capacitors.may.cause.the.Vyper
™
.to.
drop.off-line...high.voltage.power.factor.capacitors.may.be.
located. on. the. primary. side. of. the. transformer. supplying.
power. to. the. Vyper
™
. without. causing. any. malfunction. to.
equipment.located.on.the.secondary.side.
SOFT-START SEQUENCE
NOTICE
There is a thirty (30) second delay at initial start-up to
charge the capacitors of the Vyper
™
. This delay does
not occur in “Standby Mode”, only on initial start-up.
At.start-up,.both.the.motor.and.slide.valve.begin.to.load.to.a.
preset.value..The.Frick.slide.valve.will.load.to.the.“Minimum.
Slide.Valve.Position”.setpoint.and.the.Vyper™.will.accelerate.
to.the.speed.corresponding.to.the.“Minimum.Drive.Output”.
setpoint..From.this.point,.the.slide.valve.position.and.mo-
tor.speed.are.controlled.by.the.Capacity.Control.setpoints.
During.start-up,.the.VSD.varies.the.voltage.and.frequency.to.
maintain.the.same.proportion.that.exists.between.the.two.
at.design.conditions..The.required.inrush.current.to.start.the.
motor.never.exceeds.the.FLA.rating.of.the.given.motor.and.
is.typically.only.10-20%.of.FLA..Mechanical.forces.on.the.
motor.windings.and.motor.heating.are.20%.to.50%.lower.
than.with.a.mechanical.starter..This.results.in.less.mechanical.
shock.to.the.system.and.longer.motor.life.
Refer.to.PROGRAMMING.and.VYPER
™
/QUANTUM
™
LX.COM-
MUNICATIONS. Sections. and. Manual
090.022-O, “Frick
Quantum
™
Lx
Compressor Control Panel Operation”
for.
additional.operation.details.
Содержание Frick 572
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