Aprilaire 8400 series - About Your New Thermostat: Non-Programmable Models; Controls and Display Overview (Models 8444, 8446, 8448)

4
OUTDOOR TEMPERATURE SENSOR (OPTIONAL)
Outdoortemperaturecanbemeasuredbyattachingan
8052sensortotheS1andS2terminals.Systemsetting
#05(Remotesensor)isusedtoenablesensor.
Heat pump models can use the outdoor temperature to
effectivelyutilizetheheatpump:
•WhentheoutdoortemperatureislessthantheLow
BalancePoint,theheatpumpwillbelockedoutand
onlyauxiliaryheatingwillbeused.
•WhentheoutdoortemperatureishigherthantheHigh
BalancePoint,theauxiliaryheatingwillbelockedout
andonlytheheatpumpwillbeusedtoprovideheating.
INSTALLATION
C
G
Y
W
R
L
S1
S2
O/B
W2
Y2
RC
•Installonsideofbuildingoutofdirectsunlight
(north side recommended).
•Mountabovesnowline.
•Mountatleast3’awayfromexhaustventsand
condensing lines.
•Maximumwirelengthis300’.
•Donotroutewiresalong120VAClines.
61000652C 8400 Tstat Install.indd 4 10/13/09 11:08:57 AM