SystemAir SysAer SR55 - Page 52

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50 SysAer
Main menu Q0
Item
Screen code
Parameter Unit Min Fact. Max Description / Note
SERVICE
Air quality Pa
Enabling N/Y Y (option, when available) Setpoint % 0 50 100
See the Air quality part.
Differential % 0 10 99,9
FreeCooling /
FreeHeating
Pb Enable N/Y Y
At least outdoor sensor must be connected. See the FreeCooling and FreeHeating
control part (option).
Pc Type of control
Temperature/ Enthalpy
Temp. See the Temperature and Enthalpy based FreeCooling and FreeHeating control parts.
FreeCooling / FreeHeating in
temperature
Pd
Summer FreeCooling
enabling
N/Y Y
Winter FreeHeating
enabling
N/Y Y
Winter FreeCooling
enabling
N/Y Y
FreeCooling / FreeHeating in temp.
Pe Differential °C 0 4,0 20,0
Minimum difference between the room and the outdoor temperatures to allow
freecooling or freeheating in temperature.
Summer FreeCooling
in temp.
Pf
Offset °C -9.9 -2,0 9.9 Difference compared to the summer setpoint to start to open the Economizer
Differential °C -9.9 2,0 9.9 Economizer regulation band for summer freecooling
Winter FreeHeating
in temp.
Pg
Offset °C -9.9 2,0 9.9 Difference compared to the winter setpoint to finish to close the Economizer
Differential °C -9.9 2,0 9.9 Economizer regulation band for winter freeheating
FreeCooling / FreeHeating in enthalpy
Ph
Differential kJ/kg 0 5,0 20,0 Economizer regulation band for freecooling/ freeheating in enthalpy
Atmospheric pressure hPa 800 1013 1200 Average pressure. Important parameter to calculate the enthalpy