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Service Manual Danfoss Icon2™
Application 04
2-pipe heating/cooling system, changeover to cooling based on
heat pump/external potential-free NO contact
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.
18 | © Copyright Danfoss Climate Solutions | 2023.01
Installer App settings
Function
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
2
Stainless steel floor heating manifold SSM-F, 2–12 groups
Set of 2 mounting brackets
Set of 2 ball valves 1"
3
Thermal actuator TWA-A 230V NC suitable for SSM-F manifold
4
Dew point sensor CF-DS
5
External NO contact for changeover to cooling mode
Factory setting
Off
On
External supplier
088U0752 to
088U0762
088U0585
088U0822
088H3112
088U0251
External
AB432956914381en-010101
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