Danfoss ECtemp 850 IV Installation Instruction page 34

Installation instruction
Post-heating
If the reason for ending a heating period is a decrease of moisture to below the cho-
sen level, the post-heating period will start. Post-heating ensures that no ice and snow
is left on the roof.
If system priority is low, heating might be paused at any time!
The ground system uses heated sensors which under normal circumstances will
hold a temperature of 1.5 °C. In connection with measuring the area tempera-
ture heating of the sensor is turned off for 90 minutes at a time. This is done
in order to obtain a correct measurement of area temperature which is not
influenced by sensor temperature. If a system only has one sensor this sensor is
constantly heated for 90 minutes and then turned off for 90 minutes. This entails
that measurement of temperature can be up to 3 hours delayed. With more than
one sensor this performance is significantly improved.
34 | © Danfoss | 2019.07
ECtemp 850 IV
08097083 / VIMHE202