Primary parameters:
3.4 Optional: System extension for cooling
The supply air may be cooled using an optional cooling exchanger fitted in the supply air ducting. The integrated
controller will control the individual components such as circulating pump, mixing valves etc..
3.4.1 Cooling with water cooling exchanger
A 0-10 V signal controls the cold water cooling valve. Start/Stop of the circulating pump in the cooling circuit via
digital output. The alarm output of the pump may be connected to the “Cooling fault” digital input. This will trigger
an alarm when the contact opens.
Primary parameters:
Pump operation
“Constant”. The circulating pump for the cooling exchanger will run
continuously when the Pichler Air2 Master is switched on.
“Auto”. The circulating pump for the cooling exchanger will run
when cooling is needed (valve setting >0.1%).
“Outside temperature”. The circulating pump for the cooling
exchanger will run when cooling is required or when the outside
temperature exceeds the “Pump start” parameter set value.
Pump start
The pump will start when the outside temperature
exceeds the set value.
“Pump operation” must be set to “Outside temperature”
Motor-driven valve
Set the control range of the motor-driven valve (0-10 V/2-10 V)
P-band cooling
Controller parameter setting: P-band “Cooling”
I-time cooling
Regulator parameter setting: I-time “Cooling”
O P E R A T I N G A N D I N S T A L L A T I O N I N S T R U C T I O N S L G
7 5 0 - L G 6 0 0 0
P A G E
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