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Ground system
The ground system is fully
automated. It gathers in-
formation on moisture and
temperature via digital sen-
sors continuously. The sen-
sors are placed on strategic
spots on the ground area
(for further information on
the sensor please refer to
the sensor manual). By com-
bining measurements of both moisture and temperature a reliable detection of the situa-
tion is achieved.
Hence it is known whether heating of the ground area is needed in order to avoid that the
ground area is covered by ice and snow.
Standby
The system is on standby awaiting need for heating. If the measured temperature is be-
low the chosen standby temperature the system will automatically heat the area in order
to maintain the standby temperature.
Melting (heating) will start when the two following conditions are fulfilled:
• Measured moisture is higher than the chosen limit for moisture.
• Measured temperature is lower than the chosen melting temperature
Temperature and moisture are measured continuously by the sensors.
Melting Ice and snow
As long as the measured temperature is lower than the chosen melting temperature
heating of the ground area will be on. When the measured temperature reaches the cho-
sen melting temperature and the measured moisture level is below the chosen limit, the
post-heating function will be activated. The post-heating function can be disabled.
If moisture is detected on the ground area the system will continue to heat the area in
order to maintain the melting temperature. It is, however, important to understand that
even when the system is melting ice and snow it is not necessarily heating at all times.
The heating will be turned on and off in accordance with the measured temperature in
order to maintain a constant melting temperature.
If the temperature rises more than 1.5 °C above the chosen melting temperature the
system will automatically stop heating the area irrespective of the moisture on the area.
32
DEVIreg™ 850 IV
Temperature <
Standby temperature
Standby
Temperature >-
(No heating)
Standby temperature
Temperature < Melting temperature
and Moisture > Moisture limit
Melting
(Heating)
Moisture < Moisture limit
Post-heating
(Heating)
Standby
Mantaining stand-
by temperature
(Heating)
Installation instruction
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