Emerson ST55 Sensi Smart Thermostat
INTRODUCTION
The award-winning Sensi smart thermostat keeps homeowners connected to comfort and keeps them connected to their customers. Sensi Partners get access to program benefits including homeowner leads, contractor branding, custom literature, and free online training. Learn more at emerson.com/sensipartner
- HVAC MONITORING
Sensi smart thermostats deliver information homeowners need to maintain their HVAC equipment: - SMART ALERTS
Notifies customers when their system may need service, and your contact info is a click away. - SERVICE REMINDERS
Tells customers to contact you for routine maintenance or service. - USAGE REPORTS
Provides valuable system information to your customers with your company name prominently displayed every month. - EASY TO INSTALL & CONNECT
No common wire (c-wire) is required for most installations.1
Step-by-step guide in the Sensi app. - SENSI PARTNER PROGRAM
Put your name and contact info in front of customers right when they need it. You’ll reach customers through digital branding, smart alerts, service reminders, monthly usage reports, in-app branding and the Find A Pro tool. - CONTRACTOR MODE
With Contractor Mode, you can easily connect to every customer by registering thermostats individually or in batches. - KEYPAD LOCKOUT
Maintain total control by disabling changes made by others at the thermostat. - TEMPERATURE LIMITS
Prevent others from adjusting temperatures too high or too low. - SAVE ABOUT 23% ON HVAC ENERGY2
By adjusting the temperature using flexible scheduling, remote access, and geofencing, Sensi thermostat customers save about 23% on HVAC energy usage. - SMART HOME COMPATIBLE
Works with Amazon Alexa, Google Assistant, Apple HomeKit (c-wire required), and Samsung SmartThings smart home platforms.EDITORS’CHOICE
1 Common wire (c-wire) is required for Apple HomeKit, heat-only systems, cool-only systems, and heat pump systems.
2 Energy savings are calculated by comparing operation time for a nationwide sample of Sensi users with temperature adjustments averaging 4° in comparison to users with no adjustments. Savings vary based on equipment type/condition, insulation, climate & temperature adjustment size/frequency.
Use of the Works with Apple HomeKit logo means that an electronic accessory has been designed to connect specifically to iPod touch, iPhone, or iPad, respectively, and has been certified by the developer to meet Apple performance standards. Apple is not responsible for the operation of this device or its compliance with safety and regulatory standards. Google is a trademark of Google LLC. A trademark of Reviewed.com Used under license; Reprinted with permission. Copyright 2020, Reviewed.com. All Rights Reserved.
SPECIFICATIONS
- ELECTRICAL RATING
- 20 to 30 VAC, 50/60 Hz
- 1.5 Amps maximum per terminal
- 2.5 Amps maximum (all terminals combined)
- STANDARD SYSTEMS
- Single-stage gas, oil, electric
- Single-stage heat pump
- Multi-stage gas, oil, electric
- Multi-stage heat pump
- SETPOINT RANGE
- 45°F to 99°F (7°C to 37°C)
- ACCESSORIES
- Wallplate: F61-2663 (6.75″ x 4.50″)
- Thermostat guard: F29-0198
- RATED DIFFERENTIALS (6F / HR) FAST MED SLOW
- Heat (conventional gas/oil/elect): 0.5°F 0.75°F1.9°F
- Cool (central air): 0.9°F 1.2°F1.7°F
- The heat pump (heat and cool): 0.9°F 1.2°F1.7°F
- The heat pump (aux): 0.5°F 0.75°F1.9°F
- COMPATIBILITY: POWER SOURCE
- Conventional heating and cooling system: Battery (power sharing) or hardwired (c-wire)
- Apple HomeKit, heat pump*, heat only and cool only systems: Hardwired only (c-wire)
- SENSI ALERT: TRIGGER
- High temperature: Above 99°F
- Low temperature: Below 45°F
- High humidity: Above 70%
- Loss of heat/cool: Temp goes up or down 5°F during cycle
- DIMENSIONS:5.88″ W x 3.75″ H x 1.00″ D
- STORAGE:20° to 150°F (-29° to 65°C)
0%-90% RH non-condensing - OPERATING AMBIENT:32°F to +105°F (0°C to +41°C)
- OPERATING HUMIDITY:90% non-condensing max
- DISPLAY TEMPERATURE RANGE:32°F to +99°F (0°C to 37°C)
- TITLE 24 COMPLIANT
- ENERGY STAR CERTIFIED
*The Sensi thermostat provides automatic dual fuel control without an outdoor sensor. A fossil fuel kit may be added if user-selectable balance point settings are desired.
ADVANCED FEATURES
- DUAL FUEL APPLICATIONS
Automatic staging for heat pump/gas furnace without the need for outdoor sensors or additional equipment. - AUTO CHANGEOVER
Automatically switches between heating and cooling within the set range. - KEYPAD LOCKOUT
Ideal for light commercial applications – lock the thermostat keypad and keep control from the Sensi app. - BACKLIT DISPLAY
Easy-to-read screen in low light. - REMOTE ACCESS
Set, change, and program home comfort from anywhere. - FLEXIBLE SCHEDULING
Program a schedule for each day of the week. - LOCAL WEATHER
Get easy weather updates. - HUMIDITY SENSOR
Displays indoor humidity on the thermostat and in the app. - USAGE REPORTS
Monitor current day and historical heating, cooling, and fan runtimes right in the app.
- Universal thermostats provide the flexibility to control Single Stage, Multi-Stage, or Heat Pump systems
- Heat-only, Cool only, and 3-wire zone systems require common
- common wires required
TERMINAL DESIGNATIONS
‡Thermostat has an internal jumper on RC and RH. On two transformer systems, clip the red jumper wire on the thermostat.
Reference
Download Manual:
Emerson ST55, Sensi Smart Thermostat Product Specifications
