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Table of Contents
Related Manuals for Sensi ST75W
Summary of Contents for Sensi ST75W
- Page 1 PRO Installation Touch Wi-Fi Thermostat...
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Page 2: Need Help
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. -
Page 3: Mobile Device Compatibility
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 OPERATING SYSTEM... -
Page 4: Hvac System Compatibility
Yes* Single-band router with 5.0 GHz band *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 and search “router compatibility” for a list of known incompatible routers. -
Page 5: What's In The Box
• Wire Labels Items needed for Wi-Fi connection: • The homeowners compatible iOS or Android • Device with the Sensi app installed and registered • Your customer’s Wi-Fi network name (SSID) and password • A Wi-Fi network with 802.11n 2.4GHz band... -
Page 6: Installation
Installation 1. Turn terminal light switch on for better visibility. 2. Install Sensi thermostat, referring to these terminal definitions, cross references and wiring diagrams as needed: SENSI CONVENTIONAL HEAT PUMP THERMOSTAT THERMOSTAT SYSTEM SYSTEM Power for heating, 24V RC, R... - Page 9 Configuration 1. Before configuring the thermostat, switch off the terminal light. 2. Configure the thermostat to the appropriate system type. Press “Menu” on the thermostat and refer to these menu options as needed: CONFIGURATION MENU ITEMS REFERENCE Menu item Default Options Screen Brightness Adjust resting state brightness...
- Page 10 3. Once the thermostat is installed and properly configured, test the equipment by following these steps: • Turn on power to the system. • Fan Operation • If your system does not have a “G” terminal connection, skip to “Heating System” below. •...
- Page 11 • Heating System • Press the “Mode” button on the thermostat and select the “Heat” position. • Press the up arrow on the thermostat and adjust the setting to 1° above the current room temperature. The heating system should begin to operate and the thermostat display will turn red indicating heating on the screen.
- Page 12 • 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 the up arrow on the thermostat and adjust the setting to 1°...
- Page 13 • Cooling System • Press the “Mode” button on the thermostat and select the “Cool” position. • Press the down arrow 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.
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Page 14: Troubleshooting
Troubleshooting SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION No Heat/ 1. Blown fuse or 1. Replace fuse or reset breaker No Cool/ tripped circuit 2. Turn switch to ON No Fan breaker 3. Replace door panel in proper (common 2. Furnace power position to engage safety problem) switch to OFF... - Page 15 Thermostat Thermostat display Display can be adjusted +/-5° using Display & requires adjustment the Temperature Offset in Sensi app. Thermometer Disagree Display is The display could Attach a common wire (c-wire) Blank be turned off of you or turn on the display.
- Page 16 If you would like the cycle rate to increase cycle time, choose Slow for the Cycle Rate in the Sensi app. “ Call for 1. Heating or Cooling 1. See corrective action for “No Heat”...
- Page 17 Connecting Sensi to Wi-Fi 1. Ask the homeowner to download the free Sensi app onto the their iOS or Android device. 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.
- Page 18 Heating or Cooling transformer. CAUTION: E5 Alert If “Call For Service” is displayed on your Sensi thermostat, and E4 or E5 To prevent electrical shock and/ appears where the room temperature or equipment damage, disconnect should be displayed or the backlight...
- Page 19 YOUR CUSTOMER. It provides helpful instructions and information on the following: • How to connect their Sensi thermostat to Wi-Fi (if this has not already been completed) or connect additional devices • Key features of the thermostat and the app and how they work...
- Page 20 0037-7682002...
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Questions and answers
Hello I'm confused on what setting it should be having problems with heat. This is the settings I have a carrier heat pump unit. So originally it was set to AC2 EL2 and O, cooling is great no issues. But for whatever reason heater doesn't work, so I switched settings to HP1 EL1 and O and it started blowing hot air after 20 mins or so the unit turned off and tstat was turning on and off so switched back to original settings and now I'm back at square one any help will be appreciated
For a Carrier heat pump unit, the recommended settings for the Sensi ST75W thermostat are:
- RC or R: Power for cooling, 24V
- RH: Power for heating, 24V
- C (Common wire): Required for 24V power
- Y (Y1): 1st stage cooling and heating
- Y2 (Y2/*): 2nd stage cooling and heating (if applicable)
- W/E: 1st stage auxiliary/emergency heat
- W2: 2nd stage auxiliary/emergency heat (if applicable)
- G: Indoor blower (fan)
- O/B: Reversing valve for heat pump system
Ensure the thermostat is configured for heat pump mode and verify wiring matches the Carrier system specifications.
This answer is automatically generated