7
Installing Wireless Devices
Careful planning is needed when locating the receivers and transmit
-
ters based on the construction materials in the space and possibility of
tenant’s furniture disrupting the transmissions.
The temperature sensor should be installed in the space where the
receiver is mounted and connected to the temperature control equip
-
ment however the signal will travel through material barriers.
Refer to the tables below for range considerations with building
materials that reduce the radio signal power.
Material
Attenuation
Wood
0 - 10%
Plaster
0 - 10%
Glass
0 - 10%
Brick
5 - 35%
MDF
5 - 35%
Ferro concrete
10 - 90%
Metal
90 - 100%
Aluminum
90 - 100%
Material
Radio Range-typical
Line of sight:
80’ (24m) corridors
Line of sight:
150’ (46m)open halls
Plasterboard:
80’ (24m) through 3 walls
Brick:
33’ (10m) through 1 wall
Ferro concrete:
33’ (10m) through 1 wall
Ceiling:
not recommended
Wireless System Layout Hints
•
Avoid locating transmitters and receivers on the same wall.
•
Avoid locating transmitters and receivers where the telegrams
must penetrate walls at acute angles. This increases the mate-
rial the telegram must pass through reducing the signal power.
•
Avoid large metal obstructions as they create radio shadows.
Place receivers in alternate locations to avoid the shadow or use
repeaters to go around the obstacle.
•
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