EMERSON 1F87U-42WF Sensi Smart Thermostat User Guide
1. 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.
2. INSTALLATION – COMPATIBILITY AND WIRING
SENSI THERMOSTAT
CONVENTIONAL SYSTEM CONNECTION
HEAT PUMP SYSTEM CONNECTION
RC†
RH†
C
Power for cooling, 24V
Power for heating, 24V
Common wire, 24V
Power for cooling, 24V
Power for heating, 24V
Common wire, 24V
Y
1st stage cool
1st stage heat and cool (compressor)
2nd stage heat and cool (or humidifier)
2nd stage cool
(or humidifier)
Y2/*
1st stage auxiliary/emergency
heat (2nd stage heat)
W/E
1st stage heat
2nd stage heat
(or dehumidifier)
2nd stage auxiliary/emergency heat
(3rd stage heat or dehumidifier)
W2/*
G
Indoor blower (fan)
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)
Heat pump changeover (reversing
valve) connection (configure as
O or B in the installer menu)
O/B
L
no function
“L” terminal connection
Sensi smart thermostat | HUMIDITY GUIDE
2
| General | Details |
|---|---|
| Name | EMERSON 1F87U-42WF Sensi Smart Thermostat User Guide |
| Make | Emerson |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.2 MB |

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