Danfoss 140F1089, Руководство по установке, Страница: 33 / 40

DEVIreg™ 850 IV
33 Installation instruction
Post-heating
If the reason for ending a heating period is a decrease of moisture to below the chosen
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 temperature
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.