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AB432956914381en-010101
Service Manual Danfoss Icon2™
Application description
In this application, a 230V 6-way motorized ball valve is used to change over between
heating and cooling modes.
The RELAY activates when the system is in heating mode and is used to control the
6-way ball valve. The PWR1 output is active in both heating and cooling mode. It can
optionally be used to operate a 230V 2-way control valve. This acts as an additional
shut-off valve when there is no need for heat or cooling, reducing unnecessary
consumption.
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.
A relay or potential-free contact is connected to input IN2 to control the changeover
between heating and cooling modes. When the external contact is closed, the system
will change over to cooling mode.
Application 19
4-pipe heating/cooling system with 6-way motorized ball valve,
changeover to cooling based on external potential-free NO
contact
Disabling cooling (Bathroom)
If there is a bathroom with underfloor heating and an Icon2™ room thermostat, you
may want to disable cooling for this room. Cooling a bathroom will cause condensation
to form on the floor.
There are two ways to disable cooling mode for a room:
1. Using the Installer App on a smartphone
2. Using the installer menu on the thermostat itself
To do so, set the ME.7 setting to OFF
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