Emerson White Rodgers ST76 Device User Manual

Emerson White Rodgers ST76 Device

Designed by the pros for the pros

There are a lot of choices when it comes to buying a thermostat, but only one combines 100 years of HVAC experience and the latest connected home technology to empower your customers to take control of their comfort from anywhere. We proudly connect you to a professional-grade thermostat that you can offer your customers with confidence and that will keep you connected with them even after the initial install.

Sensi partner program

Always be the Contractor-On-Call with your customers. The Sensi app saves your contact information so when your customer needs service, you’re just a tap away. Register at: www.sensiregistration.com

Easy to install and connect

Sensi is designed to install like a standard thermostat. It gives you the flexibility to connect to Wi-Fi at installation or let your customer connect it later using the Sensi app.

MOBILE DEVICE COMPATIBILITY

SMART HOME PLATFORM COMPATIBILITY

HVAC SYSTEM COMPATIBILITY

Conventional heating and cooling

•   Gas furnace

•   Air conditioner

•   Electric furnace

•   Boiler

| Yes|
Heat only

•   Gas furnace

•   Electric furnace

•   Boiler

| Yes|
Cool only

•   Air conditioner

| Yes|
Heat pump| Yes|
Communicating proprietary systems| No| Needs standard HVAC wiring
Line voltage| No| Requires low voltage (20-30VAC)
Millivolt systems| No| Requires 20-30VAC

ROUTER COMPATIBILITY

Sensi thermostats require an 802.11n 2.4 GHz Wi-Fi network and are compatible with most residential Wi-Fi networks, however, there are some known incompatible routers. Visit support.sensicomfort.com

What’s in the box?

• Sensi Thermostat
• Screws and Anchors
• Welcome Guide
• Wire Labels

Items needed for Wi-Fi connection:

• The homeowner’s compatible iOS or Android device with the Sensi app installed and registered
• Your customer’s Wi-Fi network name (SSID) and password

Connecting Sensi to Wi-Fi

1. Ask the homeowner to download the free Sensi app onto their iOS or Android device. They can scan the QR code below or search “Sensi” in the app store.
2. Ask the homeowner to follow the prompts to create an account.
3. Once the homeowner has logged in, ask to use their device to connect the thermostat to the Wi-Fi.

Installation

Install Sensi thermostat, referring to these terminal definitions, cross- references, and wiring diagrams as needed:

SENSI THERMOSTAT

|

CONVENTIONAL SYSTEM CONNECTION

|

HEAT PUMP

SYSTEM CONNECTION

---|---|---
RC†| Power for cooling, 24V|
RH†| Power for heating, 24V|
C| Common wire, 24V|

Y

|

1st stage cool

| 1st stage heat and cool (compressor)

Y2/*

|

2nd stage cool

|

2nd stage heat and cool

W/E

|

1st stage heat

| 1st stage auxiliary/emergency heat (2nd stage heat)

W2/*

|

2nd stage heat

| 2nd stage auxiliary/emergency heat (3rd stage heat)
G| Indoor blower (fan)|

O/B

| Heat pump changeover, zone panel or 3-wire hot water zone valve connection. (configurable as O,

B or 6 in the installer menu)

| Heat pump changeover (reversing valve) connection (configure as

O or B in the installer menu)

ACCESSORY (+/-)| Used for dehumidifiers and humidifiers

• Two transformer systems (separate RC and RH wires), clip jumper located on the backplate to the right of the terminals.
• Label “B” as “C” only if the old thermostat also had a wire in “O”. If there is no wire in “O”-label the wire “B”.
• On the Heat Pump system with separate W2 and E wires, label both wires W/E (2 wires in one terminal).

CONVENTIONAL SINGLE-STAGE OR MULTI-STAGE SYSTEMS NO HEAT PUMP

heather PUMP SYSTEMS

ACCESSORY DEVICE

Option 1 Accessory devices such as humidifiers and dehumidifiers

Option 2 Internally powered wiringACC

Configuration
Configure the thermostat to the appropriate system type. On the thermostat, press Menu > Advanced Set Up > HVAC Equipment > Configure Refer to these menu options as needed:

CONFIGURATION MENU ITEMS REFERENCE

Menu item| Description| Options
Outdoor Equipment| Select AC or Heat Pump equipment, as well as the number of stages. Set this to AC1 for single stage systems or HP1 or HP2 for single or multi-stage heat pumps| AC1/AC2/HP1/HP2/None
Indoor Equipment| Select whether the equipment is an electric or gas furnace, or fan only. Set this to EL1

for single stage electric or GA1 or GA2 for single or multi-stage gas systems.

| GA1/GA2/EL1/EL2/Fan
Reversing Valve Position| When configured for O, reversing valve is energized in Cooling.

This will cover most applications. Some manufacturers such as Rheem or Rhudd use the B terminal, which would energize in heating. For three-wire zone hydronic systems set this to 6.

| O/B/6
Additional Accessories|  |
Humidifier

(wired to thermostat)

| If a humidifier is wired to the thermostat, change the Humidifier setting to YES| Yes/No
Dehumidifier

(wired to thermostat)

| If a dehumidifier is wired to the thermostat, change the Dehumidifier setting to YES.| Yes/No

Contractor Branding – Digital
Put your contact information in front of customers when they need it most. Register in the Sensi partner program and show up in the following areas:

• Thermostat Sleep Screen
• In The Mobile App
• Customer Emails
• Smart Alerts
• Service Reminders
• Monthly Usage Report Sign up today at: procontractorbranding.com

Contractor Mode – Sensi Mobile App
Speed up install time and quickly add your digital branding to each thermostat you install. To use contractor mode, take the following steps:

1. Download the Sensi mobile app
2. Create a Sensi account and password, then sign in
3. Press and hold the Sensi logo at the top of your screen for five seconds.
4. Enable Contractor Mode prompt by clicking OK
5. Select Contractor Mode at the top of your screen.
6. Enter the Phone Number registered to your Sensi Partner program account
7. Tap Register Thermostat
8. Scan the bar code on the back of each thermostat you install.

Not a Sensi partner? Register at SensiRegistration.com

Contractor Branding – Physical

Add a wallplate to your Sensi Touch 2 installation that includes your logo or name/phone number printed on it. Place your order today at procontractorbranding.com

System Testing

Once the thermostat is installed and properly configured, you can test the equipment using the following steps. Cooling System

• Press the Mode button on the thermostat and select the Cool position.
• Press and adjust the setting to 1° below the current room temperature. The blower should come on immediately on high speed, followed by cold air circulation. The thermostat display will turn blue. Note that there can be up to a 5 minute delay for this process. This is indicated by a flashing setpoint temperature.
• Press and adjust the setting to 1° above the current room temperature. The cooling system should stop operating and the temperature display will go to a white color.
• If you encounter any issues while testing the equipment, refer to the troubleshooting actions on page 20.

Heating System

• Press the Mode button on the thermostat and select the Heat position.
• Press + on the thermostat and adjust the setting to 1° above the current room temperature. The heating system should begin to operate and the thermostat temperature display will turn orange indicating heating on the screen.
• For heat pumps with auxiliary, press ⊕ on the thermostat and adjust the setting to 3° above the current room temperature. The auxiliary heat should begin to operate and the thermostat will indicate “Heating Auxiliary” on the screen.
• Press – on the thermostat and adjust the setting to 1° below the current room temperature. The heating system should stop operating and the temperature will go back to a white color.

Auxiliary System (only for heat pumps with auxiliary)

• Press the Mode button on the thermostat and select the Aux position. This bypasses the heat pump and runs auxiliary-only heat.
• Press + on the thermostat and adjust the setting to 1° above the current room temperature. The auxiliary heating system should begin to operate.
• Press – on the thermostat and adjust the setting to 1° below the current room temperature. The auxiliary heating system should stop operating and “Heating Auxiliary” will disappear from the screen.

Fan Operation

• If your system does not have a “G” terminal connection, skip to “Heating System” below.
• Press the Fan button on the thermostat and select the On position. The blower should begin to operate.
• Press Mode (oval button on left side) to turn off the system. Then press the Fan button on the thermostat and select the Auto position. The blower should stop immediately.

Circulating Fan

• Press the Mode button on the thermostat then set the Circulating fan to On
• Set the % run time from 10%-100% in 5% increments (default is OFF).
• The % run time is the percentage of time the fan shall run in a day. This calculation takes into account the amount of time the heating, cooling, and continuous fan have run during the same day.

Humidification

• Press the Mode button on the thermostat and select the Heat position.
• Press + on the thermostat and adjust the setting to 1° above the current room temperature. The heating system should begin to operate and the temperature display will turn orange indicating heating on the screen.
• Press Menu > Advanced Setup > Humidify
• Set Humidification to On and set the humidity set point higher than the current room humidity.
• Humidity can be adjusted from 5% to 50% in 5% increments.
• Check that the humidifier is running.
• Go back to the main screen.
• Press – on the thermostat and adjust the setting to 1° below the current room temperature. The heating and humidification system should stop operating and the temperature display will go back to a white color.

Dehumidification

• Press the Mode button on the thermostat and select the Cool position.
• Press – and adjust the setting to 1° below the current room temperature. The blower should come on immediately at high speed, followed by cold air circulation. The thermostat display will turn blue. Note that there can be up to a 5-minute delay in this process. This is indicated by a flashing setpoint temperature.
• Press Menu > Advanced Setup > Dehumidify
• Set Dehumidification to On and set the humidity set point lower than the current room humidity. Humidity can be adjusted from 40% to 95% in 5% increments.
• Depending on installed equipment, check that the system fan speed has slowed, the dehumidifier is running, or the system cools up to 3° below the temperature set point or until the humidity set point is reached.
• Go back to the home screen.
• Press + and adjust the setting to 1° above the current room temperature. The cooling system should stop operating and the temperature display will go back to a white color.

Troubleshooting

SYMPTOM| POSSIBLE CAUSE| CORRECTIVE ACTION|  | SYMPTOM| POSSIBLE CAUSE| CORRECTIVE ACTION
---|---|---|---|---|---|---
No Heat/ No Cool/ No Fan (common problem)| 1.  Blown fuse or tripped circuit breaker

2.  Furnace power switch to OFF

3.  Furnace blower compartment door panel loose

4.  Loose connection to thermostat or system

| 1. Replace fuse or reset breaker

2.  Turn switch to ON

3.  Replace door panel in proper position to engage safety interlock or door switch

4.  Tighten connections

|  |

Heat, Cool or Fan Runs Constantly

|

Possible short in wiring, thermostat, heat,

cool or fan system

|

Check each wire connection to verify they are not shorted or touching other wires. Try resetting the thermostat.

 |  | Thermostat Display & Thermometer Disagree| Thermostat display requires adjustment| Display can be adjusted +/-5° using the Temperature Offset in Sensi app.
 |  |  |  |
No Heat| 1.  Thermostat not set to Heat

2.  Loose connection to thermostat or system

3.  Heating system requires service or thermostat requires replacement

| 1. Set thermostat to Heat.

2.  Verify thermostat and system wires are securely attached.

3.  Diagnostic: Set Mode to Heat and raise the setpoint above room temperature. Within five minutes the thermostat should make a soft click sound and the temperature display should turn orange. This sound indicates the

thermostat is operating properly. If the thermostat does not click, try resetting the thermostat. If the thermostat does not click after being reset, contact your heating and cooling service person or place of purchase for a replacement.

If the thermostat clicks, verify the heating system is operating correctly.

|  | Humidity Display & Hygrometer Disagree| Humidity display requires adjustment| Display can be adjusted in 5% increments +/-25% using the Humidity Offset in the Sensi app.
 |  |

Display is Blank

|

The display could be turned off or you need a common wire (c- wire)

|

Attach a common wire (c-wire) or turn on the display.

 |  |  |

Furnace (Air Conditioner) Cycles Too Fast or Slow

|

The location of the thermostat and/ or the size of the Heating System may be influencing the cycle rate

|

Digital thermostats provide precise control and cycle faster than older mechanical models. The system turns on and off more frequently, but runs for a shorter time. If you would like

to increase cycle time, choose Slow for the Cycle Rate in the Sensi app.

 |  |  |  |  |
No Cool| 1.  Thermostat not set to Cool

2.  Loose connection to thermostat or system

3.  Cooling system requires service or thermostat requires replacement

| 1. Set thermostat to Cool.

2.  Verify thermostat and system wires are securely attached.

3.  Diagnostic: Set Mode to Cool and lower setpoint below room temperature.

Same procedures as diagnostic for “No Heat” condition except set the thermostat to Cool and lower the setpoint below the room temperature.

There may be up to a five minute delay before the thermostat clicks in Cooling

if the AC Protection feature is on.

|  |  |  |
SYMPTOM| POSSIBLE CAUSE| CORRECTIVE ACTION
---|---|---

“Call for Service” appears on

the screen

|

1.  Heating or Cooling system is not able to heat/cool the space to within 5 degrees of the setpoint within 2 hours

2.  If “–” is displayed for the Room Temperature,

a replacement thermostat is needed

3.  None of the buttons operate on the thermostat

|

1.  See corrective action for “No Heat” or “No Cool”

2.  Replace thermostat

3.  Make sure keypad lockout is not turned on. If it’s OFF, try resetting the thermostat.

Reset: Turn the power to your system off, wait 5 seconds and turn it back on.

Fan turns on randomly

|

The fan has been set to run occasionally in the configuration menu

|

Enter the configuration menu and make sure the ‘Fn’ fan run time percentage is OFF.

Warnings
INSTALLER INFORMATION
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

WARNING: OUT OF PHASE TRANSFORMERS 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.

VOLTAGE REQUIREMENTS
Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazards. Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code.

CAUTION
To prevent electrical shock and/or equipment damage, disconnect electric power to the system at the main circuit breaker box until installation is complete.

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.

CAUTION: E5 Alert
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.

FCC Regulations

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. Changes or modifications not expressly approved by the manufacturer could void the user’s authority to operate the equipment. The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. 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 or more 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.

RF Exposure

This device complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter and must be installed to provide a separation distance of at least 20cm from all persons. The FCC grant can be found under the Display Grant section of http://www.fcc.gov/oet/fccid after searching on FCC ID: 2A4JN-ST76.

IC Notice
This device complies with Industry Canada license-exempt RSS standard(s). 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. This Class B digital apparatus complies with Canadian ICES-003. IC: 28229-ST76

IC Radiation Exposure Statement
This device complies with IC radiation exposure limits set forth for an uncontrolled environment. In order to avoid the possibility of exceeding the IC radio frequency exposure limits, human proximity to the antenna shall not be less than 20cm during normal operation.

References

• Sensi Thermostat & Product Support | Sensi US
• SensiRegistration.com
• Home - Thermostat Recycling Corporation (TRC)
• Join the Sensi™ partner program

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