Carrier 30HXC Installation, Operation And Maintenance Instructions

Also see for 30HXC Series: Installation, operation and maintenance instructions Installation, operation and maintenance instructions

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Carrier 30HXC Installation, Operation And Maintenance Instructions Manual pdf 30 page image

308.2 - Power supplyThe power supply must conform to the specification on the chillernameplate. The supply voltage must be within the range specifiedin the electrical data table. For connections refer to the wiringdiagrams.WARNING: Operation of the chiller with an improper supplyvoltage or excessive phase imbalance constitutes abuse whichwill invalidate the Carrier warranty. If the phase imbalanceexceeds 2% for voltage, or 10% for current, contact your localelectricity supply at once and ensure that the chiller is notswitched on until corrective measures have been taken.8.3 - Voltage phase imbalance (%)100 x max. deviation from average voltageAverage voltageExample:On a 400 V - 3 ph - 50 Hz supply, the individual phase voltageswere measured to be:AB = 406 V; BC = 399 V; AC = 394 VAverage voltage = (406 + 399 + 394)/3 = 1199/3= 399.7 say 400 VCalculate the maximum deviation from the 400 V average:(AB) = 406 - 400 = 6(BC) = 400 - 399 = 1(CA) = 400 - 394 = 6The maximum deviation from the average is 6 V. The greatestpercentage deviation is:100 x 6/400 = 1.5%This is less than the permissible 2% and is therefore acceptable.MotorElectrical data notes for 30HXC units:• 30HXC 080-190 units have a single power connection point; 30HXC 200-375units have two connection points.• The control box includes the following standard features:- Starter and motor protection devices for each compressor- Control devices• Field connections:All connections to the system and the electrical installations must be in fullaccordance with all applicable codes.• The Carrier 30HXC units are designed and built to ensure conformance withlocal codes. The recommendations of European standard EN 60204-1(corresponds to IEC 60204-1) (machine safety - electrical machinecomponents - part 1: general regulations) are specifically taken into account,when designing the electrical equipment.• Electrical reserves:Circuit B has disconnect switches and branch sections, designed to supply theevaporator and condenser pump power input.IMPORTANT:• Generally the recommendations of IEC 60364 are accepted as compliancewith the requirements of the installation directives. Conformance with EN60204-1 is the best means of ensuring compliance with the Machines Directiveand § 1.5.1.• Annex B of EN 60204-1 describes the electrical characteristics used for theoperation of the machines.1. The operating environment for the 30HXC units is specified below:a. Environment* - Environment as classified in IEC 60364 § 3:- ambient temperature range: +5°C to +40°C, class AA4- humidity range (non-condensing)*:50% relative humidity at 40°C90% relative humidity at 20°C- altitude: ≤ 2000 m- indoor installation*- presence of water: class AD2* (possibility of water droplets)- presence of hard solids, class AE2* (no significant dust present)- presence of corrosive and polluting substances, class AF1 (negligible)- vibration and shock, class AG2, AH2b. Competence of personnel, class BA4* (trained personnel - IEC 60364)2. Power supply frequency variation: ± 2 Hz.3. The neutral (N) line must not be connected directly to the unit (if necessary usea transformer).4. Overcurrent protection of the power supply conductors is not provided with theunit.5. The factory-installed disconnect switch(es)/circuit breaker(s) is (are) of a typesuitable for power interruption in accordance with EN 60947 (corresponds toIEC 60947) .6. The units are designed for connection to TN networks (IEC 60364). For ITnetworks the earth connection must not be at the network earth. Provide a localearth, consult competent local organisations to complete the electricalinstallation.NOTE: If particular aspects of an actual installation do not conform tothe conditions described above, or if there are other conditions whichshould be considered, always contact your local Carrier representative.* The protection level required to conform to this class is IP21B (according toreference document IEC 60529). All 30HXC units are protected to IP23C andfulfil this protection condition.