
100.210-IOM (FEB 2015)
Page 20
VYPER
™
VARIABLE SPEED DRIVE
INSTALLATION
COOLANT TEMPERATURE LIMITS
Liquid.supply.cooling.temperature.limits.vary.between.Water.
and.Glycol.cooled.units..The.required.coolant.flow.rate.is.
based.on.the.maximum.temperature.of.the.coolant.type.to.
be.used.
TABlE 8 – EnTErIng CoolAnT TEmPErATUrE lImITS
Entering Coolant Temperature Limits
Drive Size
Coolant Type
Min
Max
912 hp
Water
40°F (4°C 100°F (38°C)
912 hp
Glycol (30% mix) 35°F (2°C)
95°F (35°C)
752 hp (50Hz)
Water
40°F (4°C 100°F (38°C)
752 hp (50Hz) Glycol (30% mix) 35°F (2°C) 100°F (38°C)
700 hp
Water
40°F (4°C 105°F (41°C)
700 hp
Glycol (30% mix) 35°F (2°C) 100°F (38°C)
572 hp (50Hz)
Water
40°F (4°C 105°F (41°C)
572 hp (50Hz) Glycol (30% mix) 35°F (2°C) 105°F (41°C)
GENERAL COOLING SYSTEM REQUIREMENTS
•.
Vyper
™
. Liquid-cooled. 700/912. . hP. models. provide.
one.in..NPT.threaded.male.connections.IN.and.OUT.
of.the.heat.exchanger.for.customer.connections.
•.
Sufficient. clearance. to. perform. normal. service. and.
maintenance.work.should.be.provided.around.the.entire.
unit.
Figure 8 - minimum Flow rates - WATEr
•.
An.upstream.strainer.is.recommended.to.stop.particulate.
matter.from.entering.the.heat.exchanger..The.strainer.
should.be.cleaned.several.times.during.the.first.twenty-
four.hours.of.operation.
•.
Refer.to.the.charts.in.Figures.8.and.9.for.minimum.flow.
rates..
WATER RECOMMENDATIONS
•.
Johnson. Controls-Frick. recommends. a. closed-loop.
system.for.the.customer-supplied.water.side.of.the.heat.
exchanger.
•.
Johnson.Controls-Frick.recommends.a.water.ph.level.
between.6.0.and.7.4.for.proper.heat.exchanger.life.
NOTICE
To reduce the potential of fouling the heat exchanger,
recommended minimum flow rate is 5 GPM.
•. When.adding.a.booster.pump.to.supply.condenser.water.
to.the.heat.exchanger.of.the.water-cooled.Vyper
™
,.choose.
a.pump.which.will.supply.the.proper.GPM.based.on.the.
drive. size. and. temperature. of. coolant. where. a. 700. hP.
[email protected]°F..See.Figure.8.
GLYCOL RECOMMENDATIONS
•.
Propylene.Glycol.is.to.be.used.exclusively..Glycol.con-
centration.must.be.50%.or.less.by.volume..See.Figure.9..