Aprilaire 8051 Weather Radio User Manual


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Model 8051 Flush Mount Sensor
Installation Instructions
INTRODUCTION
INSTALLATION INSTRUCTIONS
The 8051 is a temperature sensor. It can be used to remotely measure temperature with compatible Aprilaire
®
thermostats and support modules.
1. Select a location for mounting the sensor.
Locate the sensor as you would locate a thermostat.
•Mountonaninteriorwall,inafrequentlyoccupiedspace.
•Keepthesensor18”awayfromanoutsidewall.
•DONOTmountthesensor:
– Behinddoors,incornersorotherdeadairspaces.
– Indirectsunlightornearlamps,appliances,dimmer
switchesorothersourcesofheat.
– Onanoutsidewallorwallexposedtoanunconditioned
space (i.e. garage).
– Intheflowpathofasupplyregister,instairwaysornear
outside doors.
– Onawallwhereaconcealedpipeorductworkcould
influencethesensor.
– Nearsourcesofelectricalinterferencesuchaslight
switches.
Maximumwirelengthfromthesensortothethermostatorsupport
moduleis300feet.
2. Install the sensor – see back page.
3. Disconnect power to the thermostat or support module to
which the sensor will be wired.
CAUTION
Damage to components can occur if power is not
disconnected.
4. Verify the sensor resistance.
Use an ohm-meter or multimeter to measure the resistance
ofthesensor.Measureatthewiresnearthethermostator
supportmoduletocheckanywiresplices.Confirmtheresistance
corresponds (within 5%) to the temperature where the sensor
is installed.
Temperature (°F) Resistance (k )
30 34.6
40 26.1
50 19.9
60 15.3
70 11.9
80 9.4
90 7.4
100 5.9
5. Wire the sensor to the component.
CAUTION
Excessive bare wire can lead to shorts. Strip only as much
insulation as is necessary.
•Thesensorisnotpolarityspecific.Eithersensorleadmaybe
connected to either terminal on the component to which it is
wired.Toselecttheappropriateterminalsforwiringpleasesee
theinstallationmanualforthethermostatorsupportmodule.
•Usecarewhenroutingandstrippingthewire.Sharpbends(kinks)
or cuts in the wire (particularly susceptible where the insulation
hasbeenstripped)canleadtoeventualconductorfailure.
6. Reconnect power to the thermostat or support module to
which the sensor is installed.
Sensor Specifications
Voltage 20-30VAC
Resistance@25°C(77°F) 10k
Tolerance@25°C(77°F) ±3%
Thefollowingtableshowsthecorrectresistanceatvariousambient
temperatures without the sensor wires attached to a thermostat or
support module.
61000944A AA 8051 Flush Mount Sensor Install.indd 1 3/28/12 11:38 AM