Aprilaire 8052 User manual

Model 8052 Temperature Sensor
Installation Instructions
The Aprilaire® Model 8052 temperature sensor can be used
with Aprilaire thermostats, support modules, zone controls
and the Home Comfort Control™.
INSTALLATION INSTRUCTIONS
STEP 1 – INSTALL SENSOR BASED ON THE APPLICATION
Return Air Temperature
• LocatetheAprilaireModel8052sensorinthereturnat
least 6" upstream from the fresh air intake so the fresh air
does not influence the sensor reading (see FIGURE 2).
• Drilla3/8"holeintheductandmountthesensorwiththe
supplied screw and mounting bracket (see FIGURE 1).
Leaving Air Temperature
• LocatetheAprilaireModel8052sensorinthesupplytrunk,
after the heat exchanger and cooling coils (see shaded
area in FIGURE 2).
• Shieldormountawayfromdirectradiationsourcessuchas
sunlight, UV lights, heat exchangers or cooling coils.
• Drilla3/8"holeintheductandmountthesensorwiththe
supplied screw and mounting bracket (see FIGURE 1).
Outdoor Temperature
• LocatetheAprilaireModel8052sensoronthesideofthe
building out of direct sunlight (see FIGURE 3).
• Placeabovethesnowline.
• Placeatleast3'awayfromexhaustventsandcondensing
lines.
• Donotinstallinsideoutdoorcondensingunit.
Remote Radiant Heat
• LocatetheAprilaireModel8052sensorinaradiantfloor
system.
3/8" DIAMETER HOLE
DUCT SENSOR PROBE
SUPPLIED WIRE NUTS
SUPPLIED #8
SHEET METAL SCREW
90-630
FIGURE 1
NORTH, EAST
OR WEST SIDE
OF HOME
TEMPERATURE
SENSOR LEADS ABOVE EXPECTED
SNOW LINE
TEMPERATURE
SENSOR
SENSOR
SENSOR
BRACKET
90-998
FIGURE 3
6" MIN.
FRESH AIR INTAKE
SUPPLY DUCT
RETURN DUCT
RETURN AIR LOCATION
LEAVING AIR
LOCATION
NOTE: THE EXAMPLE SHOWN
IS FOR AN UPFLOW FURNACE.
90-2039
FIGURE 2
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P.O.Box1467Madison,WI53701-1467
800-334-6011F:608-257-4357
PrintedinUSA
©2015Aprilaire–AdivisionofResearchProductsCorporation
10006011B2202110B2.15
STEP 4 – WIRE THE SENSOR TO THE APRILAIRE CONTROL
• Use18–22awgwire(2-wirethermostatcable).
• Usethetwosmallwirenutsprovided.
• Uselessthan300'ofwire.
• Donotroutewirealong120VAClines.
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 Aprilaire control to which it
is wired.
 – Forsupportmodules,useT1andT2orT3andT4terminals.
 – Forthermostats,useS1andS2(Outdoor)orT1andT2(Remote)
terminals.
 – Forzonecontrols,useDAT,PlenumSensororODTterminals.
 – ForHomeComfortControl,useRAT,LATorODTterminals.
• 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.
STEP 5 – RECONNECT POWER TO THE APRILAIRE CONTROL
Sensor Specifications:
Resistance@77°F(25°C):10k
Tolerance@77°F(25°C):±3%
STEP 2 – DISCONNECT POWER TO THE APRILAIRE CONTROL TO
WHICH THE SENSOR WILL BE WIRED
CAUTION
Damage to components can occur if power is not disconnected.
STEP 3 – VERIFY THE SENSOR RESISTANCE
Useanohm-meterormultimetertomeasuretheresistanceofthe
sensor.MeasureatthewiresneartheAprilairecontrol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
Note: This measurement should be done without the sensor
connected to the Aprilaire control.
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