User's Manual
English
Wiser Air Installation Guide 1-855-559-4737 www.wiserair.com
Installation Procedure
MERCURY HAZARD
If replacing an existing thermostat that uses a sealed tube of mercury, do not
dispose of the tube in the trash. Contact local waste management authorities for
information on the safe disposal or recycling of the mercury.
Failure to safely dispose of the mercury can result in exposure leading to
serious health damage.
Optional trim plate mounting
If you are replacing an existing thermostat, you have the option of using the provided
Wiser Air trim plate. If the hole left by the removal of the existing unit is larger than the
back plate of the Wiser Air thermostat, use the optional trim plate. Run the wires and
anchor the mounting screws through it while attaching the back plate to the wall
(Fig. 2). Make sure to attach the trim plate with the central hole oriented upward.
WARNING
O/B
By default, the thermostat operates per Orange Wire Mode. It can be changed to Blue
Wire Mode in the settings.
In a heat pump system
• The O/B terminal engages the reversing valve.
U
This is a universal terminal. It has a few different functions depending on conguration.
In 3-stage heat systems
• The U terminal is used to engage the third stage of heating.
S1, S2
In advanced systems with exterior temperature measurement
• S1 and S2 can be used to connect an exterior temperature sensor.
• Use Schneider Electric part number EER57200 or another 10K based thermistor.
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