the stat is a heat pump stat will adapt for other applications in a heat mode on a Carrier heat pump O/B is not powered and Y takes the place of W1or W{same terminal } G is powered to operate the fan W2 is electric heat The first stage of heat is the "Y" energized and heat from the outside air and compresses motor heat second stage heat is W2 , W2 is also powered in stand alone for emergency heat or electric only heat when temp gets extremely low and you don't get an advantage of heat from outside air R,C,W2,E,Y,O/B,G,L. R 24vac C common W2 electric heat E emergency heat Y compressor run O/B heat /cool electrical selector G fan L I don't remember the use of this terminal see installation instructions for application if you decide to get this thermostat

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Emerson 1F83H-21NP Heat Pump (2H/1C) Non-Programmable Thermostat

Emerson 1F83H-21NP Heat Pump (2H/1C) Non-Programmable Thermostat

Q: Does this work for a geothermal heating & air conditioner system

would need to know more about the requirements that your system this stat is 2 heat stages first is heat pump heat the second is heat pump heat and restive heat ,, single stage cool , our stats have been in operation on conventional heat pump air to air units for over a year with no problems,,

Q: can the 2nd stage heat (emergency) be prevented from kicking in if set only to heat and not auxiliary?

You can set it to “slow” which limits it but does not prevent it from coming on all together. The only way I can think of locking out w2 with this thermostat would be to leave that wire disconnected.

4.6/5

Product ID: 573702886

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Details

Brand
Emerson
Model name
80 Series
Controller type
Push Button
Special features
Programmable
Colour
White

⚡Dual fuel ready, no extra sensors needed

📏4.5-inch big clear display

🔧Easy install with built-in level & pluggable terminals

Frequently Bought Together

Emerson 1F83H-21NP Heat Pump (2H/1C) Non-Programmable Thermostat

CAMGJORT F61-2663 Wall Plate for Sen si Wi-Fi Programmable Thermostat,Hand Control, White (1)

Description

🔥 Stay cool, stay smart — effortless comfort at your fingertips! 📲

LOCK IT DOWN - Keypad lock and temperature limits keep settings secure and energy-smart.
SLEEK SIMPLE - Non-programmable design for straightforward, no-fuss climate control.
DUAL FUEL READY - Seamlessly supports dual fuel systems without extra sensors—future-proof your HVAC.
CRYSTAL CLEAR DISPLAY - Large 4.5-inch backlit screen ensures effortless temperature reading anytime, even in low light.
PLUG PLAY INSTALLATION - Built-in level indicator and pluggable terminals make setup a breeze—no pro needed.

The Emerson 1F83H-21NP is a non-programmable digital thermostat designed for heat pump systems with dual fuel capability. Featuring a large 4.5-inch backlit display, easy installation with built-in level and pluggable terminals, and advanced security features like keypad lock and temperature limits, it offers reliable, straightforward climate control without the complexity of programming.

Specifications

Product Dimensions	15.24 x 2.86 x 9.53 cm; 281 g
Specific uses	Heat Pump
Batteries required	Yes
Included components	thermostat

Have a Question? See What Others Asked

Why no W terminal?

Does this work for a geothermal heating & air conditioner system

can the 2nd stage heat (emergency) be prevented from kicking in if set only to heat and not auxiliary?

My heat pump unit has 7 wires, red,blue,green,white,yellow, orange and brown. with a jumper for connecting r and rc. will this thermostat work for me?

Common Questions

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