30
The power supply must conform to the specication on the chiller
nameplate. The supply voltage must be within the range specied
in the electrical data table. For connections refer to the wiring
diagrams.
WARNING: Operation of the chiller with an improper supply
voltage or excessive phase imbalance constitutes abuse which
will invalidate the Carrier warranty. If the phase imbalance
exceeds 2% for voltage, or 10% for current, contact your local
electricity supply at once and ensure that the chiller is not
switched on until corrective measures have been taken.
100 x max. deviation from average voltage
Average voltage
Example:
On a 400 V - 3 ph - 50 Hz supply, the individual phase voltages
were measured to be:
AB = 406 V; BC = 399 V; AC = 394 V
Average voltage = (406 + 399 + 394)/3 = 1199/3
= 399.7 say 400 V
Calculate the maximum deviation from the 400 V average:
(AB) = 406 - 400 = 6
(BC) = 400 - 399 = 1
(CA) = 400 - 394 = 6
The maximum deviation from the average is 6 V. The greatest
percentage deviation is:
100 x 6/400 = 1.5%
This is less than the permissible 2% and is therefore acceptable.
Motor
• 30HXC080-190unitshaveasinglepowerconnectionpoint;30HXC200-375
unitshavetwoconnectionpoints.
• Thecontrolboxincludesthefollowingstandardfeatures:
- Starter and motor protection devices for each compressor
- Control devices
•
Allconnectionstothesystemandtheelectricalinstallationsmustbeinfull
accordancewithallapplicablecodes.
• TheCarrier30HXCunitsaredesignedandbuilttoensureconformancewith
localcodes.TherecommendationsofEuropeanstandardEN60204-1
(correspondstoIEC60204-1)(machinesafety-electricalmachine
components-part1:generalregulations)arespecicallytakenintoaccount,
whendesigningtheelectricalequipment.
•
CircuitBhasdisconnectswitchesandbranchsections,designedtosupplythe
evaporatorandcondenserpumppowerinput.
• GenerallytherecommendationsofIEC60364areacceptedascompliance
withtherequirementsoftheinstallationdirectives.ConformancewithEN
60204-1isthebestmeansofensuringcompliancewiththeMachinesDirective
and§1.5.1.
• AnnexBofEN60204-1describestheelectricalcharacteristicsusedforthe
operationofthemachines.
1. Theoperatingenvironmentforthe30HXCunitsisspeciedbelow:
a. Environment*-EnvironmentasclassiedinIEC60364§3:
- ambienttemperaturerange:+5°Cto+40°C,classAA4
- humidity range (non-condensing)*:
50% relative humidity at 40°C
90%relativehumidityat20°C
- altitude:≤2000m
- indoor installation*
- presenceofwater:classAD2*(possibilityofwaterdroplets)
- presenceofhardsolids,classAE2*(nosignicantdustpresent)
- presenceofcorrosiveandpollutingsubstances,classAF1(negligible)
- vibrationandshock,classAG2,AH2
b. Competenceofpersonnel,classBA4*(trainedpersonnel-IEC60364)
2. Powersupplyfrequencyvariation:±2Hz.
3. Theneutral(N)linemustnotbeconnecteddirectlytotheunit(ifnecessaryuse
atransformer).
4. Overcurrentprotectionofthepowersupplyconductorsisnotprovidedwiththe
unit.
5. Thefactory-installeddisconnectswitch(es)/circuitbreaker(s)is(are)ofatype
suitableforpowerinterruptioninaccordancewithEN60947(correspondsto
IEC60947).
6. TheunitsaredesignedforconnectiontoTNnetworks(IEC60364).ForIT
networkstheearthconnectionmustnotbeatthenetworkearth.Providealocal
earth, consult competent local organisations to complete the electrical
installation.
* TheprotectionlevelrequiredtoconformtothisclassisIP21B(accordingto
referencedocumentIEC60529).All30HXCunitsareprotectedtoIP23Cand
fullthisprotectioncondition.
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