Danfoss ECL Comfort User Manual page 12

10g
10.4 Ventilation system with constant
temperature control and fresh air supply
Control principle:
PI control of the inlet temperature (S3) and P control of the
room temperature (S2) with a neutral zone between heating
and mixing. When heating, the adjusted temperature is
controlled by the motorized valve M1 in the primary circuit
of the air heater. When mixing, the adjusted temperature is
controlled by the gear motor M2 which controls the dampers.
Fan P1 is controlled by relay R1 (please note that it is not
possible to set any minimum damper position from the
controller).
System settings
Circuit Line Description
I C
I 1
I 85
Balance temperature
Dead zone - Dz
Application selection
Recomm.
setting
23 °C
OFF
2