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APPENDIX: PROBES CONNECTION
To assure the utmost comfort, the control system needs reliable information, which can be obtained provided the sensors have
been installed correctly.
Sensors measure and transmit all variations encountered at their location.
Measurement is taken based on design features (time constant) and according to specific operating conditions.
With wiring run in raceways, the sheath (or pipe) containing the wires must be plugged at the sensor's terminal board so that
currents of air cannot affect the sensor's measurements
Ambient probes (or ambient thermostats)
Installation
The sensors (or room thermostats) must be located in refe-
rence rooms in a position where they can take real tempera-
ture measurements without being affected by foreign factors.
It's good to be admired ...even better to be effective
Heating systems: the room sensor must not be installed in
rooms with heating units complete with thermostatic valves.
Avoid all sources of heat foreign to the system.
Location
On an inner wall on the other side of the room to heating units
height above floor 1.5 m, at least 1.5 m away from external
sources of heat (or cold)
Installation position to be avoided
near shelving or alcoves and recesses, near doors or win-
dows, inside outer walls exposed to solar radiation or currents
of cold air, on inner walls with heating system pipes, domestic
hot water pipes, or cooling system pipes running through
them.
Outside probes (weather)
Installation
In heating or air-conditioning systems featuring adjustment in
response to outside temperature, the sensor's positioning is of
paramount importance.
General rule: on the outer wall of the building where the living
rooms are, never on the south-facing wall or in a position
where they will be affected by morning sun. If in any doubt,
place them on the north or north-east façade
Positions to be avoided
Avoid installing near windows, vents, outside the boiler room,
on chimney breasts or where they are protected by balconies,
cantilever roofs.
The sensor must not be painted (measurement error).
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