EMERSON 1F87U-42WF Sensi Smart Thermostat User Guide

EMERSON 1F87U-42WF Sensi Smart Thermostat

SENSITM SMART THERMOSTAT

Humidity Control Guide

Models: 1F87U-42WF, ST55, NH-AWIFI, OH-AWIFI Version: April 2023
Emerson Electric Co. All rights reserved R-5622

Product Information

The SENSITM Smart Thermostat is a Wi-Fi enabled thermostat that allows you to control your home’s temperature and humidity settings remotely. The thermostat is compatible with conventional and heat pump systems and can be configured for single-stage or multi-stage HVAC systems. The thermostat also includes a humidity control feature that allows you to set your desired humidity level and maintain it throughout the day. The thermostat comes with a user manual that provides detailed instructions on how to set up and configure the device.

Product Usage Instructions

Contractor Firmware Update Process:

1. Connect the thermostat to Wi-Fi
2. Register to the customer’s account to make sure the thermostat has the latest firmware release.

Conventional System Connection:

RC RH C Y Y2/ W/E W2/ G O/B L

Power for cooling, 24V Power for heating, 24V Common wire, 24V 1st stage cool 2nd stage cool (or humidifier) 1st stage heat 2nd stage heat (or dehumidifier) Indoor blower (fan) Heat pump changeover, zone panel or 3-wire hot water zone valve connection. (configurable as O, B or 2 in the installer menu) no function

Heat Pump System Connection:

RC RH C Y Y2/ W/E W2/ G O/B L

Power for cooling, 24V Power for heating, 24V Common wire, 24V 1st stage heat and cool (compressor) 2nd stage heat and cool (or humidifier) 1st stage auxiliary/emergency heat (2nd stage heat) 2nd stage auxiliary/emergency heat (3rd stage heat or dehumidifier) Indoor blower (fan) Heat pump changeover (reversing valve) connection (configure as O or B in the installer menu) L terminal connection

1 Wire Humidification & Dehumidification Thermostat

1. W2/* Terminal de-energizes on call for dehumidification with call for cool
2. Y2/* Terminal energizes on call for humidification with call for heat

Humidification Control at the Thermostat:

1. Ensure HVAC settings are single stage
2. With the thermostat showing the room temperature, press Menu
3. Press Next 7 times
4. Use the Up Arrow button to toggle Humidity On
5. Press Next
6. Use the Up Arrow button to change the set percentage (SP) to your desired percentage to maintain

CONTRACTOR FIRMWARE UPDATE PROCESS

Connect the thermostat to Wi-Fi, register to the customer’s account to make sure the thermostat has the latest firmware release.

INSTALLATION

COMPATIBILITY AND WIRING

WIRE HUMIDIFICATION & DEHUMIDIFICATION

1. W2/* TERMINAL DE-ENERGIZES ON CALL FOR DEHUMIDIFICATION WITH CALL FOR COOL
2. Y2/* TERMINAL ENERGIZES ON CALL FOR HUMIDIFICATION WITH CALL FOR HEAT

DEHUMIDIFICATION WITH RELAY INSTALLED

CONFIGURATION

SETTING HUMIDIFICATION/DEHUMIDIFICATION CONTROL CAPABILITY ON/OFF

Ensure HVAC settings are single stage

To set up a wired humidifier accessory on this model, you will need to ensure that you have configured the HVAC settings for single stage first. (Single stage cooling to use a humidifier or single stage heating to use a dehumidifier.)
If you have the thermostat configured for multi-stage, the humidity control options won’t be in the menu.

Setting up wired humidification

• With the thermostat showing the room temperature, press Menu.
• Press Next 7 times.
• Use the Up Arrow button to toggle Humidity On.
• Press Next.
• Use the Up Arrow button to change the set percentage (SP) to your desired percentage to maintain.
• Press Exit.

Setting up wired dehumidification

• With the thermostat showing the room temperature, press Menu.
• Press Next 8 times. – This may be different depending on what other settings you have. Look for the “dH AA” menu.
• Use the Up Arrow button to toggle Dehumidity “On.”
• Press Next.
• Use the Up Arrow button to change the set percentage (SP) to your desired percentage to maintain.
• Press Exit.

Adjusting the humidity features from the Sensi app

After initially turning the feature on in the thermostat menu, you can edit them from the Sensi app.

• Open the Sensi app.
• Tap your Thermostat Name.
• Tap the Settings Gear.
• Tap System Settings.

Scroll to the Humidity Control section.
You can toggle the humidification features on/off here, as well as adjust the set percentage.

If you don’t have wired dehumidification configured, you will have a different dehumidification option here that you can utilize. It will use your cooling system to remove moisture from the air by overcooling your space up to 3 degrees.

Frequently asked questions

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