3.6 Optional: Demand-driven plant operation
The Pichler Air2 system can offer several options for demand-driven air flow control:
Constant CO
2
/ RH value
Fan optimiser
GreenZone
PI zone module / PI optimiser
3.6.1 Constant CO
2
value
The plant must be configured with a CO
2
sensor.
The CO
2
sensor may be fitted either as a room sensor or as a duct sensor in the extract air duct.
3.6.2
F
an optimiser
Supply air and extract air fans are controlled by fan optimiser signals from the supply and extract
air ducts.
The fan optimiser signal (0-10 V) is connected to the analogue input.
The plant must be fitted with 2 separate fan optimisers
–
one each in the supply and extract air
ducts.
3.6.3 GreenZone/PI zone modules, PI optimisers
GreenZone modules control demand-driven ventilation (CO
2
, RH%, temperature) of the
individual zones (rooms)
GreenZone Master will optimise the air flow based on real time required air volumes in the
individual zones
Plug and Play system
PI zone modules (in rooms/zones) and PI optimisers together with flow regulators will adjust fan speeds as
required to save energy. This will guarantee optimal plant operating points. Fan speeds may also be
controlled depending on CO
2
-/ RH content. This will require a relevant sensor in either the ambient or
extract air ducts.
3.7
Optional:
Building automation - networking
The Pichler Air2 system offers several options for networking into a higher level building automation system.
Integrated Web server
Modbus RTU
Modbus TCP/IP
BACnet
LON
The corresponding bus connection will be activated/parameterised ex factory on customer request.
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