Danfoss ECL Comfort User Manual page 14

10i
10.5 Ventilation system with constant room
temperature control - heating and cooling
Control principle:
PI control of the inlet temperature (S3) and P control of the
room temperature (S2) with a neutral zone between
heating and cooling. When heating, the adjusted temperature
is controlled by the motorized valve M1 in the primary circuit
of the air heater. When cooling, the adjusted temperature is
controlled by the motorized valve M2 in the primary circuit of
the air cooler. Fan P1 is controlled by relay R1, damper P2 by
relay 2.
System settings
Circuit Line Description
I C
I 1
I 2
I 85
Balance temperature
Dead zone - Dz
Temperature limits (S3) min/
max
Application selection
Recomm.
setting
23 °C
2 K
10 °C / 50 °C
2