Carel k.Air, User Manual, Page: 71 / 192

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Functions k.air +030220981 rel. 1.2 - 01.12.2020
R if D escription D ev Min Max UoM D ir Modbus BAC net
IE C
I001 IEC: PID parameters - Proportional gain 8.0 0.0 999.9 - R/W HR1646 AV3141
IEC: PID parameters - Integral time 120 0 999 - R/W HR1647 PIV3142
I005 IEC: Return humidity activation threshold 75.0 0.0 100.0 %rh R/W HR1648 AV3143
IEC: Return humidity activation diff erential 2.0 0.0 20.0 %rh R/W HR1649 AV3144
I010
IEC: Exhaust humidity limit threshold 95.0 0.0 100.0 %rh R/W HR1650 AV3145
IEC: Exhaust humidity limit proportional gain 10.0 0.0 999.9 - R/W HR1651 AV3146
IEC: Exhaust humidity limit integral time 60 0 999 s R/W HR1652 PIV3147
I015 IEC: Fresh air damper maximum limitation 0.0 0.0 100.0 % R/W HR1653 AV3148
Tab. 9.y
Note:
if an exhaust humidity probe is installed, it is recommended to use a type with limits extended to 0 to 100%
9.13 Humidity control
Humidity control can be activated by enabling the humidifi er and/or the dehumidifi cation option, both available on screen
Ac04. Control is carried out based on the selected probe (screen Ac32), supply, return or room. When the unit is turned on, the
humidity regulation can be delayed by a confi gurable time (mask Ac32) compare to the temperature regulation.
Control can be performed using the relative humidity value or the absolute humidity value.
To assist commissioning, the set point will still be the relative humidity value, and k.air will then calculate the equivalent in abso-
lute humidity by taking into account the temperature set point; the result is shown on the info screen.
With the humidifi er and dehumidifi cation enabled, the unit has both settings available and independent of the active mode,
heating or cooling. The humidity changeover function can be set on screen Ac36.
30220980_195_R01
RegPrb (rh%)
HumSetp
ChgDT
Band
ChgDT
Time
Mode
Hum Hum Dehum
Key
RegPrb Control probe
HumSetp Humidity set point
Band Changeover band
ChgDT Changeover delay
Fig. 9.ab
R if D escription D ev Min Max UoM D ir Modbus BAC net
U N IT
Aa75 Unit setpoints - Humidity - Cooling - Economy - Setpoint 60.0 LowLimVal HiLimVal %rh R/W HR1161 AV2671
Unit setpoints - Humidity - Heating - Economy - Setpoint 40.0 LowLimVal HiLimVal %rh R/W HR1162 AV2672
Unit setpoints - Humidity - Cooling - Economy - Low limit value 50.0 0.0 HiLimVal %rh R/W HR1163 AV2673
Unit setpoints - Humidity - Heating - Economy - Low limit value 35.0 0.0 HiLimVal %rh R/W HR1164 AV2674
Unit setpoints - Humidity - Cooling - Economy - High limit value 65.0 LowLimVal 100.0 %rh R/W HR1165 AV2675
Unit setpoints - Humidity - Heating - Economy - High limit value 45.0 LowLimVal 100.0 %rh R/W HR1166 AV2676
Aa78 Unit setpoints - Humidity - Cooling - Pre- comfort - Setpoint 55.0 LowLimVal HiLimVal %rh R/W HR1167 AV2677
Unit setpoints - Humidity - Heating - Pre-comfort - Setpoint 45.0 LowLimVal HiLimVal %rh R/W HR1168 AV2678
Unit setpoints - Humidity - Cooling - Pre- comfort - Low limit value 40.0 0.0 HiLimVal %rh R/W HR1169 AV2679
Unit setpoints - Humidity - Heating - Pre-comfort - Low limit value 30.0 0.0 HiLimVal %rh R/W HR1170 AV2680
Unit setpoints - Humidity - Cooling - Pre- comfort - High limit value 60.0 LowLimVal 100.0 %rh R/W HR1171 AV2681
Unit setpoints - Humidity - Heating - Pre-comfort - High limit value 55.0 LowLimVal 100.0 %rh R/W HR1172 AV2682
Aa81 Scheduler: confi guration - Enabled FALSE 0 1 - R CS064 BV64
Unit setpoints - Humidity - Cooling - Comfort - Setpoint 50.0 LowLimVal HiLimVal %rh R/W HR1173 AV2683
Unit setpoints - Humidity - Heating - Comfort - Setpoint 50.0 LowLimVal HiLimVal %rh R/W HR1174 AV2684
Unit setpoints - Humidity - Cooling - Comfort - Low limit value 40.0 0.0 HiLimVal %rh R/W HR1175 AV2685
Unit setpoints - Humidity - Heating - Comfort - Low limit value 30.0 0.0 HiLimVal %rh R/W HR1176 AV2686
Unit setpoints - Humidity - Cooling - Comfort - High limit value 60.0 LowLimVal 100.0 %rh R/W HR1177 AV2687
Unit setpoints - Humidity - Heating - Comfort - High limit value 55.0 LowLimVal 100.0 %rh R/W HR1178 AV2688