16 | © Copyright Danfoss Climate Solutions | 2023.01
AB432956914381en-010101
Service Manual Danfoss Icon2™
Application description
Floor heating system with automatic changeover to cooling based on supply
temperature input. A PT1000 sensor is used to monitor the supply temperature.
Thesystem will change over to heating or cooling based on this measurement. If the
sensor is connected, the system will control the circulation pump, activating it if there
is a need for heat or cooling in at least one room. The PT1000 sensor must be mounted
to a pipe where flow will be assured at all times.
The heating signal for e.g. a boiler or heat pump will only be activated if the system is
in heating mode and there is a heating demand in at least
one room.
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.
Application 03
2-pipe heating/cooling system, changeover
to cooling based on supply temperature
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
Change water temperature to heating 25.0°C
Change water temperature to cooling 19.0°C
Required accessories
1 Dew point sensor CF-DS 088U0251
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 PT1000 temperature sensor ESM-11 087B1165
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