Raychem EMDR 10 Handbuch Seite 7

2.3 installation and dimensions of the Temperature Sensor
A good positioning of the temperature sensor is crucial for the correct and efficient
operation of the snow melting system. The temperature sensor should be placed on
the North side of the building, in a position where it will always be away from direct
sunlight. Moreover, it must be protected against other influences, i.e. it may not be
mounted above doors or windows and not close to lamps or floodlights.
A position on the wall just below a gutter is recommended.
The connection wire of the sensor may be extended to max. 100 m at a lead diameter of
1.5 mm 2 .
The wires of the temperature sensor has to be considered as carrying mains voltage
according to VDE. The relevant installation regulations must be observed. Connection
diagram see item 5.
dimensions:
2.4 installation and dimensions of the Moisture Sensor
A good positioning of the moisture sensor is crucial for the correct and efficient
operation of the snow melting system.
The moisture sensor and heating cable(s) served / controlled by the same control unit
should be positioned in the same roof area. The moisture sensor is usually placed in
a gutter at the lowest position in the system adjacent to one of the drainpipes. This
is usually where water / snow is last cleared from the gutter, hence ensuring that
the whole protected area is cleared before the heating system turns off. The exact
positioning will depend on the particular building and the prevailing weather conditions.
If experience shows that the system shuts down before snow is removed from a key
area, then the sensor should be moved to that area.
For mounting the sensor in the gutter use the fixing brackets (Hard-46) to fix the sensor
adjacent and parallel to the heating cable. Ensure that the sensor remains flat and is
not in contact with the heating cable.
The connection wire of the moisture sensor may be extended to max. 100 m at a lead
diameter of 3 x 1.5 mm
The wires of the moisture sensor are carrying mains voltage!
dimensions:
35
. Connection diagram see item 5.
2
4 m
active sensor length
52
40
650
500
7