[Ahu23x] Air handling unit, temperature and humidity cascade control, pressure control

Name: [Ahu23x] Air handling unit, temperature and humidity cascade control, pressure control (all options)

Library hierarchy: Plants

Plant operating modes

Off
On
On with full speed
Night cooling
Smoke extraction by supply air
Smoke extraction by exhaust air
Smoke extraction purge

Plant diagram

Main functions	Main components
Temperature control with extract air/supply air temperature cascade control Humidity control with extract air/supply air cascade control Air quality control Pressure control	Fans, speed-controlled Shutoff dampers and fire dampers Energy recovery with rotary heat exchanger Mixing air dampers Hot water heating coil Hot water heating/cooling coil Chilled water cooling coil Hot water reheating coil Humidifier, temperature-controlled for cooling (Extract air) Humidifier

Control function diagrams

Temperature cascade control

Humidity cascade control

Supply air temperature control*

*without mixed air dampers

Supply humidity control

Air quality control

Supply/Extract air pressure control

Program blocks

Exhaust air damper (Optional)
[Dmp21] Damper, open/close function & 2 BI for feedback	Family Dmp

Outside air damper (Optional)
[Dmp21] Damper, open/close function & 2 BI for feedback	Family Dmp

Outside air filter (Optional)
[AFil21] Air filter, with filter detector	Family Fil

Energy recovery (Optional)
[Erc21] Energy recovery, rotary heat exchanger, temperature-controlled	Family Erc
	If you do not have "Ccl" with humidity control, but "HCcl" with humidity control, connect "HCcl'DhuActv" manually.
Mixed air damper (Optional)
[DmpMx21] Mixed air damper, temperature-controlled	Family DmpMx
	If you do not have "Ccl" with humidity control, but "HCcl" with humidity control, connect "HCcl'DhuActv" manually.
Heating coil (Optional)
[Hcl21] Hot water heating coil, temperature-controlled	Family Hcl
	If you do not have "Ccl" with humidity control, but "HCcl" with humidity control, connect "HCcl'DhuActv" manually.
Heating/Cooling coil (Optional)
[HCcl23] Heating/cooling coil, temperature-controlled, humidity-controlled	Family HCcl

Cooling coil (Optional)
[Ccl23] Chilled water cooling coil, temperature-controlled, humidity-controlled	Family Ccl

Supply air fan (Optional)
[Fan24] Fan, pressure-controlled	Family Fan

Extract air fan (Optional)
[Fan24] Fan, pressure-controlled	Family Fan

Extract air filter (Optional)
[AFil21] Air filter, with filter detector	Family Fil

Humidifier (Optional)
[Hum22] Humidifier, humidity-controlled, with limitation controller	Family Hum

Extract air humidifier (Optional)
[HumTCtl21] Humidifier temperature-controlled	Family HumTCtl

Reheating coil (Optional)
[Hcl21] Hot water heating coil, temperature-controlled	Family Hcl
	The options "Frost protection", "Support for start-up purge", and "Support for dehumidification" are deactivated.
Temperature sensors, setpoints and control
[AhuTCtl21] Sensors, setpoints and temperature control for air handling unit	Family AhuTCtl

Humdity sensors, setpoints and control
[AhuHuCtl21] Sensors, setpoints and humidity control for air handling unit	Family AhuHuCtl

Air quality sensors, setpoints and control
[AhuAQualCtl21] Sensors, setpoints and air quality control for air handling unit	Family AhuAQualCtl

Extract air fire dampers (Optional)
[Fdp21] Fire damper, open/close function & 2 BI for feedback	Family Fdp

Supply air fire dampers (Optional)
[Fdp21] Fire damper, open/close function & 2 BI for feedback	Family Fdp

Command sequence monitoring (Optional)
[CmdSeqMon21] Command sequence monitoring	Family CmdSeqMon

Plant mode determination
[AhuPltMod21] Plant operating mode determination for air handling unit, for on/off fans	Family AhuPltMod