
100.210-IOM (FEB 2015)
Page 58
VYPER
™
VARIABLE SPEED DRIVE
OPERATION
Figure 74 - FlA Trim Pot
Step 4:
Advance. to. the. Vyper
™
. Screen. by. pressing. the.
[
MENU
].key.and.then.selecting.“
Setpoints
”.and.“
Operating
Values
”.using.the.down.cursor.arrow.key..Select.“
Vyper
”.
from.the.pull-down.menu.and.press.the.[
Enter
].key..Locate.
“Job.FLA”.on.the.Vyper.Screen..See.Callout.1.in.Figure.75.
Figure 75 - Job FlA on the Vyper Screen
Step 5:
Use.a.flat-blade.screwdriver.to.adjust.the.trim.pot.
until. the. “Job. FLA”. field. on. the. Vyper
™
. Screen. reads. the.
Job.FLA.Value.determined.in.Step.2..Turning.the.trim.pot.
clockwise.will.increase.the.FLA.reading;.turning.the.trim.pot.
counterclockwise.will.decrease.the.FLA.reading.
Step 6:
Close.the.door.for.the.Vyper
™
.cabinet.and.secure.
using.the.latches.on.the.side.of.the.cabinet.
NOTICE
If Logic Board is replaced, the Job FLA must be reset to
the proper value using the Job FLA Trim Pot.
MOTOR ROTATION
CAUTION
Before operating the Vyper
™
Drive, remove the coupling
center and verify proper compressor motor rotation.
Damage to the motor will occur if the motor leads are not
connected properly.
Verify.the.compressor.motor.rotates.in.the.proper.direction.
by.removing.the.coupling.center.and.initiating.a.system.start...
If.the.motor.rotates.in.the.wrong.direction,.the.check.motor.
leads.for.proper.connections.
Installation.and.operational.setup.of.the.Vyper
™
.Drive.is.now.
complete.and.ready.for.operation.
In.addition.to.the.eight.DIP.switches.on.SW3,.jumper.JP3.
must.be.installed.in.order.for.Vyper
™
.control.to.be.set.at.
‘Refrigeration’.mode..Refer.to.callout.1.on.Figure.73.for.the.
location.of.JP3.on.the.logic.board.
Figure 73 - Vyper logic Board
There.is.also.a.dipswitch.to.select.60hz.or.50hz,.depending.
on.the.application..Ensure.that.it.is.properly.set..See.callout.
2.on.Figure.73.
SETTING THE JOB FLA
The.final.item.for.operational.setup.of.the.Vyper
™
.is.adjusting.
the.Job.Full.Load.Amps.(FLA).calibration.via.a.trim.pot.on.
the.Vyper
™
.Logic.board.
The.operator.must.perform.a.calculation.to.determine.the.Job.
FLA.and.then.adjust.the.trim.pot.on.the.logic.board.in.order.
to.set.the.correct.value.for.the.Job.FLA.on.the.Quantum
™
LX.
Vyper.Screen.
In. order. to. perform. the. calculation,. the. “Applied. Motor.
FLA”.is.required..The.“Applied.Motor.FLA”.was.previously.
determined.(Table.15).and.is.displayed.on.the.Quantum
™
LX.
Motor.Screen..Use.to.following.steps.to.set.the.Job.FLA:
Step 1:
To. complete. the. calculation,. use. Table. 19,. “Limit.
Calculations”.
TABlE 19 – lImIT CAlCUlATIonS
Limit Calculations
Line
Parameter
Value
1
Applied.Motor.FLA.(Table.15)
2
Applied.Service.Factor
1.15
3
Multiply.(Line.1.x.Line.2)
4
hP.rating.of.Vyper.Drive
5
Vyper.Amp.Limit
If.Line.4.is.700/572.hP,.value.is.880.A.
If.Line.4.is.912/752.hP,.value.is.1180.A
6
Multiply.Line.5.x.1.05
Step 2:
Referring.to.the.calculations.in.Table.19,.determine.
which.of.the.following.applies:
• If value of Line 3 is less than the value of Line 6, use
the value of Line 3 for the Job FLA.
• If value of Line 3 is greater than value of Line 6, use the
respective value in Line 5 as the Job Full Load Amps.
Step 3:
Locate.the.trim.pot.on.the.Vyper
™
.Logic.board..The.
trim.pot.is.a.rectangular.blue.component.in.the.central.area.
of.the.board..See.Callout.1.in.Figure.74.