Glossary
C wire
The “C” or common wire brings 24 VAC power to the thermostat from the heating/cooling system.
Some older mechanical or battery operated thermostats may not have this wire connection. It is
necessary for establishing a Wi-Fi connection to your home network.
Heat Pump heating/cooling system
Heat pumps are used to heat and cool a home. If your old thermostat has a setting for auxiliary
or emergency heat, you likely have a heat pump.
Conventional heating/cooling system
Non–heat pump type systems; these include air handlers, furnaces or boilers that run on natural
gas, oil or electricity. They may or may not include an air conditioner.
Jumper
A small piece of wire that connects two terminals together.
MAC ID, MAC CRC
Alphanumeric codes that uniquely identify your thermostat.
QR Code
®
Quick response code. A two-dimensional,machine-readable image. Your wireless device can read
the black and white pattern in the square and link its browser directly to a web site. QR Code is a
registered trademark of DENSO WAVE INCORPORATED.
Regulatory information
FCC Compliance Statement (Part 15.19) (USA only)
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1 This device may not cause harmful interference, and
2 This device must accept any interference received,
including interference that may cause undesired
operation.
FCC Warning (Part 15.21) (USA only)
Changes or modifications not expressly approved by
the party responsible for compliance could void the
user’s authority to operate the equipment.
FCC Interference Statement (Part 15.105 (b))
(USA only)
This equipment has been tested and found to
comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against
harmful interference in a residential installation. This
equipment generates uses and can radiate radio
frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications. However, there
is no guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television reception,
which can be determined by turning the equipment
off and on, the user is encouraged to try to correct the
interference by one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a
circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV
technician for help.
Thermostats
To comply with FCC and Industry Canada RF exposure
limits for general population/ uncontrolled exposure,
the antenna(s) used for these transmitters must be
installed to provide a separation distance of at least
20 cm from all persons and must not be co-located
or operating in conjunction with any other antenna or
transmitter.
RSS-GEN
Under Industry Canada regulations, this radio
transmitter may only operate using an antenna of
type and maximum (or lesser) gain approved for the
transmitter by Industry Canada. To reduce potential
radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent
isotropically radiated power (e.i.r.p.) is not more than
that necessary for successful communication.
Operation is subject to the following two conditions:
1 this device may not cause interference, and
2 this device must accept any interference, including
interference that may cause undesired operation of
the device.
