Danfoss Icon2 - Application 04: 2-Pipe Heating;Cooling; 2-Pipe Heating;Cooling: Changeover via External NO Contact

18 | © Copyright Danfoss Climate Solutions | 2023.01
AB432956914381en-010101
Service Manual Danfoss Icon2™
Application description
Floor heating system with automatic changeover to cooling mode, controlled
byaheat pump or other heating and cooling source. The heat pump signals
theDanfoss Icon™ Master Controller to start cooling using a potential-free NO contact
connected to IN2.
The PWR1 circulation pump will activate whenever there is at least one room with
aheating or cooling demand. The RELAY (heat source control) will activate whenever
there is at least one room with a heating demand.
If it is not possible to prevent the supply temperature from dropping below the dew
point in cooling mode, it is strongly recommended that you add a dew point sensor.
Condensation can result in permanent damage to the floor’s construction and finish.
If dew point monitoring is active, the pump and all actuator outputs will be inactive.
Application 04
2-pipe heating/cooling system, changeover to cooling based on
heat pump/external potential-free NO contact
Installer App settings
Function Factory setting
Off On
PWM+ proportional control of actuator outputs
฀
Heat pump optimizer – maintenance of minimum flow
฀
PWR1 switch-on delay of 3 minutes
฀
RELAY switch-on delay of 3 minutes
฀
IN2 input for changeover to cooling
฀
Required accessories
1 Heat pump or hybrid system External supplier
2 Stainless steel floor heating manifold SSM-F, 2–12 groups
088U0752 to
088U0762
Set of 2 mounting brackets 088U0585
Set of 2 ball valves 1" 088U0822
3 Thermal actuator TWA-A 230V NC suitable for SSM-F manifold 088H3112
4 Dew point sensor CF-DS 088U0251
5 External NO contact for changeover to cooling mode External