Emerson 1F87U-42WF Smart Thermostat
Sensi Smart Thermostat – Best Value
Overview
- Home comfort control – Anytime. Anywhere.
- Intuitive app and hardware design validated by research and reviews
- A traditional look that covers 90% of existing thermostat footprints
- Extensive compatibility: heat, cool, heat pump, dual fuel
- No c-wire is required in most cases (except HomeKit
Features
- Remote app control
- Auto changeover
- Large backlit display
- Humidity control
- Usage reports in-app for
- heating, cooling, and fan run time
- Contractor branding on device and in-app
- Popular smart home platform integrations – Amazon Alexa, Google Assistant, Apple HomeKit, SmartThings, and Wink
- Geofencing smart feature and flexible scheduling options for energy savings
- Multi thermostat control capable of light commercial applications
Sensi Smart Thermostat Comparison
Compatibility and common wire (c-wire) requirement
- No common wire required
Conventional heating and cooling systems - Common wire required
- Apple HomeKit
- Heat only or Cool only (2 wire)
- Heat pumps
- Not compatible
- Millivolt systems
*External 24 VAC Transformer is an option - Communicating systems
- Line voltage systems
- Accessory control
Terminal outputs
The common wire could be labeled “C”, “B” or “X” on the old thermostat. Please refer to the owner’s manual of the old thermostat.
What if I don’t have a common wire and need one?
There are a few options if the application does not have or will not allow the pulling of a common wire (c-wire) through the wall.
- Look for an unused wire in the thermostat cable bundle
Video: Using an extra, unused wire as a common wire - Use the “G” (Fan wire)
Video: Using a g-wire (fan wire) as a common wire - Install an Emerson Thermostat Common Wire Kit
Video: Using an Emerson Thermostat Common Wire Kit
Do I need an RC/RH jumper?
No jumpers required
- Sensi Thermostat has a built-in RC/RH jumper, no need to field install a jumper
- If you have separate wires to RC and RH terminals (two transformer systems)
Label the wires RC and RH separately and then clip the jumper wire on the back of the Sensi face plate.
RC/RH jumper location
Sensi Thermostat has a jumper built-in on the back of the thermostat
No jumpers are required when installing the Sensi Smart Thermostat
Heat pump jumper wires
- Some thermostats will have additional jumpers installed
- Remove the jumper and label as shown below
Wiring
Wiring – two transformer – conventional single-stage or two-stage systems
A quick tip: The thermostat wiring does not follow a standardized color code. Take a picture with your smartphone and label the thermostat wires before removing old thermostat from the wall.
Wiring – heat pumps single-stage or multi-stage systems
A quick tip: The thermostat wiring does not follow a standardized color code. Take a picture with your smartphone and label the thermostat wires before removing the old thermostat from the wall.
Heat pump wiring exceptions
Separate W2 and E Wires
• Both wires will be labeled W/E and attached to the same terminal.
B Terminal Wires
- “B” terminal can be used for more than one. Here is the solution to cross.
- If there is a wire on the “O” terminal, label the B wire C
- If there is no wire on the “O” terminal, label the B wire O/B
Terminal outputs
Note that Y2/* and W2/* are being used for wired humidification or dehumidification, respectively
System configuration
System Compatibility List – Humidity Control
• Heat only: Humidifier only
• Cool only: Dehumidifier only
• 1 stage heat, 1 stage cool: Humidifier and Dehumidifier
• 1 stage heat, 2 stage cool: Dehumidifier only*
• 2 stage heat, 1 stage cool: Humidifier only*
• 2 stage heat, 2 stage cool: None*
* Note: if the staging on a 2-stage heat or 2-stage cool system can be handled by the furnace/air handler board, that will open up the Y2 or W2 terminal for hum/dehum use.
How to Set Up Humidity Control on the Sensi Thermostat
Installation
- Install humidifier/dehumidifier equipment
- Wire the whole-house humidifier to the Y2/* terminal
- Wire the whole-house or standalone dehumidifier to the W2/* terminal
- New menu items H AA and dH AA (Additional Accessory)
- For wired dehumidification, select OC (Optimal Comfort)
- for dehumidification through overcooling, select Od (Optimal Dehumidification)
- Depending on the installed equipment, select the appropriate configuration
Connecting to Wi-Fi is simple
Connect with your customers – Anytime. Anywhere.
- Register your company at www.SensiRegistration.com
Upload your logo which will be displayed on your customer’s phone - During installation, enter your registered phone number in the Sensi app
The Sensi app stores your contact information in your customer’s phone. - When your customer needs service, you’re just a tap away.
Also, if your customer receives a smart alert due to a system issue, your contact information will be included
Grow your business with a light commercial solution from Sensi
Sensi Multiple Thermostat Manager offers a simple, affordable solution for property-wide comfort control, connected in one place.
Learn more and take a FREE test drive at sensi.emerson.com/mtm
Reference:
DOWNLOAD MANUALS:
Sensi Smart Thermostat 1F87U-42WF Installation Manual
OTHER MANUALS:
Emerson 1F87U-42WF Smart Thermostat Product Specifications Guide
Emerson 1F87U-42WF Smart Thermostat Installation Manual