EMERSON 1F87U-42WF Sensi Smart Thermostat User Guide

Emerson 1F87U-42WF Sensi Manual: Questions and Answers

Can I use a humidifier with a two-stage cooling and heating system?

No. Humidification requires single-stage cooling or single-stage heating configuration. Multi-stage systems don't show humidity control options in the menu. User Guide, p. 5

What does the HAA setting control on the Emerson 1F87U-42WF Sensi?

Humidification Add accessory. Toggles humidification on or off. User Guide, p. 4

How do I enable wired humidification on the Emerson 1F87U-42WF Sensi?

Access the humidification menu and set the desired humidity level.

1. From the room temperature display, press Menu.
2. Press Next 7 times.
3. Use the Up Arrow to toggle Humidity On.
4. Press Next.
5. Use the Up Arrow to set your desired percentage to maintain.
6. Press Exit. User Guide, p. 5

What do the humidity control settings mean on Emerson 1F87U-42WF Sensi?

Humidity setpoint should be between 30-50% RH depending on outdoor temperature. Lower the setpoint if condensation appears on windows in cold weather. User Guide, p. 7

Which terminals enable humidity features on Emerson 1F87U-42WF?

Use Y2/* for humidification and W2/* for dehumidification. User Guide, p. 7

Is dehumidification without a wired accessory possible on Emerson 1F87U-42WF Sensi?

Yes. Overcooling allows the thermostat to cool up to 3 degrees below the AC setpoint to remove moisture without additional hardware. User Guide, p. 7

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