Danfoss ECL Comfort User Manual page 16

10k
10.6 Ventilation system with constant room
temperature control - heating and heat
recovery
Control principle:
PI control of the inlet temperature (S3) and P control of
room temperature (S2) with a neutral zone between heating
and recovery. When heating, the adjusted temperature is
controlled by the motorized valve M1 in the primary circuit
of the heat exchangers. At heat recovery, the adjusted
temperature is controlled by the gear motor M2 which
controls the dampers. Fan P1 is controlled by
relay R1 and damper P2 by relay R2.
System settings
Circuit Line Description
I C
I 1
I 85
Balance temperature
Dead zone - Dz
Application selection
Recomm.
setting
23 °C
OFF
2