Carrier 50FF Series Control Manual

Also see for 50FC Series: Installation, operation and maintenance instructions Controls, Start-Up, Operation and Troubleshooting User manual Service and maintenance instructions Installation, operation and maintenance instructions

Contents

Carrier 50FF Series Control Manual Manual pdf 35 page image

3513 - OPTIONAL FUNCTIONS OF CONTROLC2C1+15%-15%+85%-85%BandBand Tc TrTr: return temperatureTc: setpoint temperatureBand: temperature control bandDehumidification enabledCOOLING modeTc = 26.0ºC, Band = 2ºC85% = 1.7ºC, 15% = 0.3ºCOFF dehumidification < 24.3ºCON dehumidification > 25.7ºCON dehumidification < 26.3ºCOFF dehumidification > 27.7ºCHEATING modeTc = 21.0ºC, Band = 2ºC85% = 1.7ºC, 15% = 0.3ºCOFF dehumidification < 19.3ºCON dehumidification > 20.7ºCON dehumidification < 21.3ºCOFF dehumidification > 22.7ºC13.5. Outdoor temperature compensationThis function allows the setpoint temperature to vary in accordancewith the temperature measured by the outdoor air probe.The outdoor temperature compensation rules are different forHEATING and COOLING mode operation.The compensation of the setpoint enables thermal “shock”between the inside and outside of the premises to be preventedwhilst at the same time providing significant energy savings whenthe outdoor temperature values are particularly significant forambient temperature control.COOLING mode (Summer)The compensation function increases the setpoint temperaturewhen the outdoor temperature increases.- Minimum outdoor temperature to start compensation = 30ºC- Compensation differential that determines the variation band ofoutdoor temperature = 5ºC- Maximum increase in the temperature setpoint alloweda = 5ºCHEATING mode (Winter)The compensation function decreases the setpoint temperaturewhen the outdoor temperature decreases.- Maximum outdoor temperature to start compensation = 0ºC- Compensation differential that determines the variation band ofoutdoor temperature = 5ºC- Maximum decrease in the temperature setpoint allowed = 5ºC13.3. DehumidificationThis function is carried out by starting up the compressors inCOOLING mode when the relative humidity of the return (orambient) air is greater than the humidity setpoint established plusthe differential.The compressors are stopped when they enter into the dead zone.DEHUMIDIFICATIONC1Zm/2 BandHc HrHr: Relative humidity of return airHc: Humidity setpointZm: Dead zoneBand: Humidity control bandNote: In the event that several compressors have been selectedin dehumidification, these will start or stop through the samedehumidification stage.To ensure that the compressors can control humidity, the return airmust have a temperature ranging between the setpoint ±15% of thetemperature differential and the setpoint ±85% of the temperaturedifferential, as indicated in the following chart.If the value “% return temperature ON dehumidification” is equalto the value “% return temperature OFF dehumidification”, thisgraphic is not taken into account for the dehumidification, and thedehumidification by temperature is not limited.SUMMERDifferentialInitialcompensation T.SetpointCoolingsetpointMaximumcompensationoutdoor T..WINTERDifferentialTª InitialcompensationSetpointHeatingsetpoint MaximumcompensationOutdoor T.13.4. Low return temperature applicationThis function allows to blow air with low temperature attendingto the demands of the installation when is the unit operated inCOOLING mode. To do this, the evaporation control of the indoorunit is managed. This allows to adjust the supply air flow accordingto the return temperature.● Connection de the servomotores for the supply dampers:- 5 wires (section 0.5 at 1.5 mm2 ), supply 24Vac.● Connection to the electrical cabinet of the unit 50FF/FC:- Power supply: 230Vac ((L&N): 2 wires (section 0.5 at 1.5mm2 ).- Communication (RX+/TX+ & RX-/TX-): shielded cable typeAWG20 or AWG22 with 1 braided pair + drainwire + shielding(e.g., model BELDEN 7703NH).Note : Please refer to the wiring diagram provided with the unit50FF/FC to get more detailed information about the wiring.