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Installation Guide
Application 0008: 3-pipe system with cooling control via motorized actuators
and common return controlled by reference room thermostat.
Optional: Dewpoint sensor (recommended), Global standby, pump relay and heat demand signal.
Application description
3 -pipe Floor heating system with cooling controlled via motorized actuators and common return.
The Icon™ system controls the heat and cooling demand by activating the corrosponding outputs (PWR1
and potential free relay). For cooling applications it is always recommended to have a dew point sensor
installed in the system to prevent moisture damage to floor and installations in cases where the relative
humidty exceeds dew point. Four conditions must be true before cooling in a room is allowed:
•
Reference room temperature must exceed the room setpoint + cooling hysterhesis.
•
No room has called for heating within neutral time.
•
The dew point sensor must not be active / no condensation risk present.
•
The room thermostat must be enabled for cooling (default = enabled)
If no heating or cooling demand is present, the two shut-off valves will close (AMZ 112).
The Global standby is a potential free input that can be used to remotely put the system in Global away
mode e.g. via an external 3
degree celcius setpoint.
Settings
"SET 1" = Set desired cooling hysterhesis for change-over [+2 to +4K]
"SET 2" = Set neutral time that must pass without active heating or cooling, before change-over can be
activated [3-6 Hrs.]
APPLICATION
SETTINGS
18 | © Danfoss | FEC | 2018.12
Expansion Module for Danfoss Icon™ Master
party GSM module. When global standby input is active, all rooms receive a 15
rd
OK
OK
OK
OK
OK
OK
VIMDE20F / 088N2100
OK
OK
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