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INSTALLATION
OUTDOOR TEMPERATURE SENSOR (OPTIONAL)
Outdoor temperature can be measured by attaching an
8052 sensor to the S1 and S2 terminals . System setting
#15 (Outdoor Sensor) is used to enable sensor .
Heat pump applications 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 to provide heating .
• 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 .
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• 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 .
W
G
C
S1 S2 O/B
W2 Y2
RC
R
Y
L
INSTALLATION
THERMOSTAT MOUNTING
1 . Remove the rear mounting plate from the thermostat .
2 . Pull wires through the opening on the back of the rear
mounting plate .
3 . Position and level the mounting plate of the thermostat on
wall and mark the hole locations with a pencil .
4 . Drill 1/4" holes and insert supplied anchors (drywall only) .
5 . Place mounting plate over anchors, insert and tighten screws .
6 . Seal wire entry holes to prevent drafts affecting temperature
readings .
POWER & RESET OPTIONS
The thermostat is powered from 24VAC . In the case of power loss the thermostat will maintain the clock for 24
hours . The thermostat has a memory backup that saves the thermostat settings in case of power interruption .
The reset button located under the cover on the front of the thermostat can be used to reset the thermostat to
factory defaults . The system settings will also be set to default .
90-2033
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