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Air-Cooled Condenser
Installation & Operation
Bulletin No. H-IM-90 August 2008 Part Number 25007301
Replaces.H-IM-90,.March.2006
Table of Contents
Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . . . . . . . . . .
System.Warranty .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
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Inspection Unit Location Responsibility.should.be.assigned.to.a.dependable.individual.at. Units.are.designed.for.outdoor.application.and.may.be.mounted. the.job.site.to.receive.material ..Each.shipment.should.be.carefully. on.a.roof.or.concrete.slab.(ground.level.installation) ...Roof. mounted.units.should.be.installed.level.on.steel.channels.or.an. checked.against.the.bill.of.lading .. The.shipping.receipt.should. not.be.signed.until.all.items.listed.on.the.bill.of.lading.have.been. I-beam.
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Drawing 1. Rigging Instructions 3
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Space and Location Requirements The.most.important.consideration.which.must.be.taken. Another.consideration.which.must.be.taken.is.that.the.unit. into.account.when.deciding.upon.the.location.of.air-cooled. should.be.mounted.away.from.noise.sensitive.spaces.and.must. equipment.is.the.provision.for.a.supply.of.ambient.air.to.the. have.adequate.support.to.avoid.vibration.and.noise.transmission. condenser,.and.removal.of.heated.air.from.the.condenser.area .. into.the.building ..Units.should.be.mount
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Notes: Typical Arrangements Figure.1.illustrates.a.typical.piping.arrangement.involving.a. 1 .. All.oil.traps.are.to.be.as.short.in.radius.as.. . remote.condenser.located.at.a.higher.elevation,.as.commonly. . possible ..Common.practice.is.to.fabricate.the.. . encountered.when.the.condenser.is.on.a.roof.and.the.compressor. . trap.using.three.90.degrees.ells . . and.receiver.are.on.grade.level.or.in.a.basement.equipment. room .. 2 .. Pressure.relief.valves.are.recommended.at.the.. . . . condenser.
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Discharge Lines The.proper.design.of.discharge.lines.involves.two.objectives:. 1 .. To.minimize.refrigerant.pressure.drop,.since.high.. . 2 .. To.maintain.sufficiently.high.gas.velocity.to.carry.oil.. pressure.losses.cause.increased.compressor.. . . . through.to.the.condenser.coil.and.receiver.at.all.loading.. horsepower.per.ton.of.refrigerant . . conditions . Table 1. Tons of Refrigeration Line Size Discharge Line Drain Line Type L Copper Velocity 100 FPM Refrigerant R-22 Sat. Suction Temp
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Diagram 1. Typical Condenser Wiring Diagram with Fan Cycle Controls 7
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Start-Up Fan Cycling Check.for.proper.fan.rotation ...Air.is.drawn.through.the.coil.on.all. A.decrease.in.ambient.air.temperature.results.in.a.capacity. units ...Be.sure.the.fans.turn.freely . . increase.in.the.air-cooled.condenser .. This.capacity.increase.is. . directly.proportional.to.the.temperature.difference.between.the. Rotation.of.the.motors.and.blades.should.be.in.a.“CW”.direction. condensing.temperature.and.the.temperature.of.the.ambient. looking.at.the.unit.from.the.blade.side ..
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Fan Cycling Head Pressure Controls Flooding Head Pressure Controls Condenser.fans.are.cycled.to.maintain.adequate.head.pressure .. Another.means.of.head.pressure.control.is.to.change.the. Ambient.and.pressure.fan.cycling.are.available.as.optional. condenser.capacity.by.filling.the.inside.of.the.condenser.with. equipment . . liquid.refrigerant ..Flooding.controls.are.ideal.for.condensers. . operating.in.low.ambient.conditions.(beyond.the.limits.of.fan. Ambient.fan.cycling.cycles.fans.in.respo
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Table 3. Minimum Ambient for Fan Cycling Numb er of Fans Single Double Design T.D.* Row Row 30 25 20 15 10 . 2. 4. 35. 45. 55. 60. 70 . 3. 6. 15. 30. 40. 55. 65 . 4. 8. 0. 15. 30. 45. 60 . 5. 10. 0. 10. 20. 35. 55 . 6./.7. 12./.14. 0. 0. 10. 30. 50 *.Based.on.maintaining.90°F.minimum.condensing.temperature . Table 4. Mechanical Fan Cycling Thermostat Settings ......... . Number of Fans Single Double Design Thermostat Setting Row Rows T.D. 1 2 3 4 5 . 2. 4. 30. 60 . .
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Table 5. Electronic Fan Cycling Thermostat Settings * Number of Fans A350 S350 Temperature Stage Modules Single Double Design Set Offset Settings Row Rows T.D. Point 2 3 4 5 . . . 30. 60 . . . 25. 65 . 2. 4. 20. 70 . . . 15. 75 . . . 10. 80 . . . 30. 60. 20 . . . 25. 65. 10 . 3. 6. 20. 70. 10 . . . 15. 75. 10 . . . 10. 80. 15 . . . 30. 60. 10. 30 . . . 25. 65. 10. 25 . 4. 8. 20. 70. 5. 20 . . . 15. 75. 5. 15 . . . 10. 80. 5. 10 . . .
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Table 7. Refrigerant Charge for Fan Cycling plus Flooded Condenser (lbs. R-22) 25° TD 20° TD 15° TD 10° TD Summer Model* Charge 40°F 20°F 0°F -20°F 40°F 20°F 0°F -20°F 40°F 20°F 0°F -20°F 40°F 20°F 0°F -20°F 1 8 7 8 9 9 8 9 10 10 9 10 11 11 13 12 12 12 2 10 9 12 13 14 11 13 14 15 13 14 15 16 17 18 17 18 3 10 1 6 8 10 4 8 10 11 7 10 12 13 10 13 14 14 4 15 2 9 12 15 7 12 15 17 12 16 18 19 17 19 21 22 5 29 4 17 24 29 14 24 30 34 24 31 36 39 33 38 41 43 6 22 0 3 10 15 0 10 16 20 0 17 22 25 0 24 27
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Table 9. Flooded Charge Temperature Difference Factor Design T.D. Ambient, °F 30 25 20 15 10 +60 – 0 .38 1 .0 1 .74 2 .46 +40 0 .59 0 .80 1 .0 1 .19 1 .40 +20 0 .76 0 .88 1 .0 1 .13 1 .25 0 0 .84 0 .91 1 .0 1 .07 1 .16 -20 0 .88 0 .93 1 .0 1 .05 1 .13 Table 10. Model Cross Reference Model Reference *NH *NL *NX *NQ *NE 1 *NH-S01-A007 *NL-S01-A007 *NX-S01-A006 *NQ-S01-A005 *NE-S01-A008 2 *NH-S01-A009 *NL-S01-A008 *NX-S01-A008 *NQ-S01-A006 *NE-S01-A009 3 *NH-S02-A011 *NL-S02-A010 *NX-S02-A010 *NQ-S
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In-Warranty Return Material Procedure Material.may.not.be.returned.except.by.permission. of.authorized.factory.service.personnel.of.Heatcraft. Refrigeration.Products.in.Stone.Mountain,.Georgia ..A. “Return.Goods”.tag.will.be.sent.to.be.included.with.the. returned.material ..Enter.the.required.information.on.the. tag.in.order.to.expedite.handling.at.our.factories.and. prompt.issuance.of.credits ...All.parts.shall.be.returned. to.the.factory.designated.on.the.“Return.Goods”.tag,. transportation
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E Series Motors with Integrated Variable Speed E.Series.units.use.an.EC.motor/fan.blade.combination.to.provide.variable.speed.condenser.control ...All.components.required. to.run.the.motor.at.variable.speeds.are.built.into.the.motor . Warning! When.connecting.the.unit.to.the.supply.power,.. . dangerous.voltages.occur ..Do.not.open.the.motor.within.. . the.first.5.minutes.after.disconnection.of.all.phases . Be sure that the unit is isolated. Warning! Dangerous.external.voltages.can.be.present..
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Integration constant The.integration.constant.switch.provides.ability.to.change. controller.from.a.proportional.only.control.to.a.proportional. plus.integral.control .. To.provide.the.most.responsive.system. to.maintain.a.stable.head.pressure,.it.is.recommended.this. setting.be.left.on.“fast . ” . Head Pressure Setpoint The.head.pressure.setpoint.potentiometer.is.adjustable. from.90-250.psig ...A.typical.setpoints.are.from.170-200.psig ... Reverse acting or direct acting mode of operation Note:.
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Master/Slave Configuration EC Motor Wiring The.EC.motor.control.signals.are.wired.in.a.Master/ Slave.configuration ... This.configuration.allows.for.the. All.EC.motor.wiring.is.done.at.the.factory ...If.any.motor. maximum.sound.and.energy.reduction.as.well.as.the. wiring.needs.to.be.done.in.the.field,.the.diagram.below. most.stable.head.pressure.control ... The.control.signal.is. indicates.the.terminal.pin.configurations.inside.the. delivered.to.the.master.motor.(located.at.the.header.end. motor
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Diagram 2. Typical 1 x 4 EC M TYPICAL ot 1X4 EC MOT or Wiring with 0-10V DC C OR WIRING ontrol Signal WITH 0-10V DC CONTROL SIGNAL CONTROL WIRING POWER WIRING 0 - 10V DC L1 CONTROL 3Ø POWER SIGNAL L2 SUPPLY L3 PE KL3 KL2 KL1 PE 12 11 10 9 8 7 6 5 4 3 2 1 3 2 1 3 2 1 FAN 1 (HEADER FAN) L1 3Ø POWER L2 SUPPLY BLK L3 RED PE KL3 KL2 KL1 PE 12 11 10 9 8 7 6 5 4 3 2 1 3 2 1 3 2 1 FAN 2 L1 3Ø POWER L2 SUPPLY BLK L3 RED PE KL3 KL2 KL1 PE 12 11 10 9 8 7 6 5 4 3 2 1 3 2 1 3 2 1 FAN 3 L1 3Ø POWER L2 SUPPLY
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KL3 KL3 KL3 KL3 KL3 KL3 KL3 KL3 KL3 KL3 SENSOR BLK BLK BLK BLK BLK BLK BLK BLK BLK BLK RED RED RED RED RED RED RED RED RED RED Diagram 3. Typical EC Condenser Wiring Diagram with External Signal 3ÿ/60Hz FAN MOTOR IDENTIFICATION 5 4 3 2 1 USE COPPER CONDUCTORS ONLY FACTORY WIRING FIELD WIRING DISCONNECT SWITCH L1 L2 L3 FAN SPEED CONTROL CIRCUIT 0 to 10V DC T1 T2 T3 TERMINAL T1 T2 BOARD 1 TERMINAL BOARD 2 M1 8 - GND 7 - 0-10V PWM 2 - GND 1 - OUT M2 8 - GND 7 - 0-10V PWM 2 - GND F5 F4 F3 F2 F1 1 -
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Installation Check List Condenser Start Up Date Model # Serial # Electrical Voltage Amperage Installer: Name & Address Telephone: Please retain this information with the condenser. Since.product.improvement.is.a.continuing.effort,.we.reserve.the.right.to.make.changes.in. specifications.without.notice . ™ The name behind the brands you trust. CLIMATE Commercial Refrigeration Parts CONTROL 20 H-IM-90-0808.
