Danfoss DEVIreg 850, Инструкция по установке и эксплуатации

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DEVIreg™ 850 ground and roof sensors
Installation and user manual 10
2 .3 Placing roof sensors
Placing roof sensors in appropriate spots is very important to the performance of the Ice
& Snow melting system. The appropriate spot must fulfil some requirements, where the
below 2 are the most important:
The sensors must be placed minimum 1 m within the boundaries of the heated
zone . The sensors must not be covered and prevented from being exposed to
snow or rain . This includes dirt and especially leaves in the gutters .
2 .3 .1 Placing the first roof sensor in a zone
Find one who knows the area and make him describe the area function and weather
conditions. The first roof sensor in a zone must now be placed where
ice and snow
cause most problems
.
The appropriate spot can be found by following below steps:
a) Where the heated area is in shade or oriented to the north/west
b) In the main gutter close to the main down pipe
If you have a dual zone system, the first sensor for the other zone must be placed by
following the same steps above.
2 .3 .2 Placing the following roof sensors in a zone
The following roof sensors in a zone must be placed where the surface dries up latest .
The appropriate spot can be found by following below steps:
c) Where the snow slides e.g. due to roof joints or gutter valleys
d) In other gutters, close to other down pipes
e) So the whole zone is covered, but min. 1 meter from other sensors
If there is doubt about the appropriate spot, prepare a second spot for later use.
2 .3 .3 Guiding plates
guiding
plate
If a roof area is oriented to the south and the roof slope is
steep it can be exposed to strong sun radiation.
In that case it can be necessary to install guiding plates
above the sensor, so the slowly dripping melting water
from the roof hit the roof sensor.
If there is doubt about the appropriate spot, prepare a
second spot for later use.