Install Instructions

Correct placing of the sensor(s) is important for the system to work as intended. Some basic

guidelines:

The number of ground sensors:

1) The more sensors you add to your system the better the performance.

2) The basic principle is to place one sensor where the snow/ice will appear first (for fast

detection) and one sensor where the snow/ice will disappear last (for complete melting). If it is

not obvious just place the sensors as far apart from each other as possible.

3) With only one sensor you will have to decide what is most important:

a) fast detection and activation of the system or

b) securing a complete melting of all snow/ice. A one sensor ground system will be less fast

regarding detection and activation than a two sensor ground system, where one sensor

measures the ground temperature and the other sensor measures the moist.

4) With more than two sensors it is possible to cover problem spots where snow usually is not

detected or where snow is not completely melted when the system stops.

Installing Ground Sensors

1) The sensor must be placed within the heated area and at least 3.3’ (1m)

from the edge of the area, if possible.

2) The sensor must be placed in between the heating cables - a distance

of minimum 0.4” (1cm) should be maintained between the sensor tube

and the heating cable.

3) There must be a distance of minimum 3.3ft. (1m) between the two sensors.

Installing an Individual Ground Sensor

Sensor

Min. 3 ft.

0.4” (1cm)

(

)

Junction box

Feeder cable

(Max 4 sensors per GX 850 Dual Zone ACP)

Note: When extending sensor

wires in junction box connect

like color wires together.

EFH.IM.GX850 - 11/2009