Carrier AquaForce PUREtec 30XW-VZE 451 Installation, Operation And Maintenance Instructions

165 - ELECTRICAL CONNECTIONPlease refer to the certified dimensional drawings, supplied withthe unit.5.1 - Power supplyThe power supply must conform to the specification on the unitnameplate. The supply voltage must be within the range specifiedin the electrical data table. For connection details refer to the wiringdiagrams.WARNING: Operation of the unit with an improper supplyvoltage or excessive phase imbalance constitutes abusewhich will invalidate the Carrier warranty. If the phaseimbalance exceeds 2% for voltage, or 10% for current, contactyour local electricity supplier at once and ensure that the unitis not switched on until corrective measures have been taken.5.2 - 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:The maximum deviation from the average is 6 V. The greatestpercentage deviation is: 100 x 6/400 = 1.5 %. This is less thanthe permissible 2% and is therefore acceptable.(AB) = 406 - 400 = 6(BC) = 400 - 399 = 1(A) = 400 - 394 = 65.3 - Power connectionUnits with one compressor have one connection pointUnits with two compressors have two connection pointst5.4 - Recommended wire sectionsWire sizing is the responsibility of the installer, and depends onthe characteristics and regulations applicable to each installationsite. The following is only to be used as a guideline, and does notmake in any way liable. After wire sizing has been completed,using the certified dimensional drawing, the installer must ensureeasy connection and define any modifications necessary on site.The maximum connectable wire section is 2x240mm² per phase.5.5 - Power cable entryThe power cables can enter the unit control box from above theunit. A removable aluminium plate on the upper part of the controlbox face allows introduction of the cables. Refer to the certifieddimensional drawing for the unit.5.6 - Field control wiringIMPORTANT: Field connection of interface circuits may leadto safety risks: any control box modification must maintainequipment conformity with local regulations. Precautionsmust be taken to prevent accidental electrical contact betweencircuits supplied by different sources:- The routing selection and/or conductor insulationcharacteristics must ensure dual electric insulation.- In case of accidental disconnection, conductor fixingbetween different conductors and/or in the control boxprevents any contact between the conductor ends andan active energised part.Refer to the SmartVuTM Control manual and the certified wiringdiagram supplied with the unit for the field control wiring of thefollowing features:- Customer interlock- Remote on/off switch- Demand limit external switch- Remote dual set point- Alarm, alert and operation report- Evaporator pump control- Condenser pump control signal (This does not controlcondenser pump operation (for this function add option 156and flow switch).- Heating/cooling change-over- Refrigerant leak detection- Water valve control (option)- Various interlocks and reports on the Energy ManagementModule board (option)CCN bus connection- The permanent connection to the system CCN bus is madeat the terminal provided for this purpose inside the controlbox.- The connection of the CCN service tool is possible at asocket under the control box, accessible from outside.5.7 - 24 and 230 V power reserve for the userControl circuit reserve:After all required options have been connected, the TC transformerincludes a power reserve of 1 A at 24 V a.c. that can be used forthe field control wiring.A second TCA transformer supplies the 230 V, 50 Hz circuit tocharge a battery for a portable computer at 0.63 A maximum at230 V. The connection is via an EEC 7/16 type socket (2 poleswithout earth) located on the inside front of the control box andaccessible from outside.Only devices with class II double insulation can be connected atthis socket.Motor