Installation Operation Maintenance

InstallationInterconnectionbetween CCUN andRemote CondenserThe CCUN has the capability tocontrol the fan staging of theremote condenser if the option istaken.Each refrigerant circuit can controlfrom one up to 6 fans per circuitusing a 4 output relays(10A/250VAC/AC1/SPDT) card optionprovided in the control box the ofCCUN. The external wiring to theremote condenser shall beconnected directly to the terminalblock for the optional fan relaycards.CAUTION:Power supply to the outdoor fanrelays shall not be provided fromthe CCUN unless special care to theVoltage and to the powerconsumption was evaluated.Table 14 - Control output relaysOutput relayQuantity of fansLow SpeedFan 1High SpeedFan 2 Fan 3 Fan 4 Fan 5 Fan 6Single speedFan option234561 2 3&4 Two fan speed first fan1 3&4 Single speed only fans1 2 3 4 Two fan speed first fan1 3 4 Single speed only fans1 2 3 4 4 Two fan speed first fan1 3 4 4 Single speed only fans1 2 3 3 4 4 Two fan speed first fan1 3 3 4 4 Single speed only fans1 2 3 3 4 4 4 Two fan speed first fan1 3 3 4 4 4 Single speed only fansTable 15 - Fan staging - Example : 4 fans per circuit, single speedStageNumber of FansStandard - 4 fans per circuitRelays Energized1 2 3 4Capacity [%]0 0 0 0 0 0 0.001 1 1 0 0 0 25.002 2 1 0 1 0 50.003 3 0 0 1 1 75.004 4 1 0 1 1 100.00Table 16 - Fan staging - Example : 4 fans per circuit with first fan 2-speedStageNumber of FansLow Ambient 2 Speed 4 fans per circuitRelays Energized1 2 3 4Capacity [%]0 0 0 0 0 0 0.001 0.5 1 0 0 0 12.502 1 0 0 1 0 25.003 1.5 1 0 1 0 37.504 2 0 0 0 1 50.005 2.5 1 0 0 1 62.506 3 0 0 1 1 75.007 3.5 1 0 1 1 87.508 4 0 1 1 1 100.0028CG-SVX06A-E4