Instructions / Assembly

Sensi

™

Wi-Fi Programmable Thermostat Installation Guide 14

Installer Information

On two transformer systems, the transformers MUST be in phase. Measure

the voltage across RC and RH. If more than 12 Volts AC is present between

RC and RH, then the transformers are NOT in phase. To correct this condition,

reverse the secondary low voltage connections at either the Heating or

Cooling transformer.

Thermostat installation and all components of the control system shall

conform to Class II circuits per the NEC code. Do not use on circuits

exceeding speciﬁed voltage.

Do not use on circuits exceeding speciﬁed voltage. Higher voltage will

damage control and could cause shock or ﬁre hazard.

To prevent electrical shock and/or equipment damage, disconnect

electric power to system at maincircuit breaker box until installation

is complete.If “Call For Service” is displayed on your Sensi thermostat,

and E4 or E5 appears where the room temperature should be displayed

or the backlight is ﬂashing, please call our support team immediately

at 888.605.7131.

ATTENTION: MERCURY NOTICE

This product does not contain mercury. However, this product may replace

a product that contains mercury.

Mercury and products containing mercury must not be discarded

in household trash.

Refer to thermostat-recycle.org for location to send product containing mercury.

FOR CALIFORNIA RESIDENTS:

WARNING: This product contains a chemical known to the state of

California to cause cancer and birth defects and other reproductive harm.

WARNING

CAUTION