Johdanto
This manual provides comprehensive instructions for the installation, operation, and maintenance of your Emerson 1E78-140 Non-Programmable Heat Only Thermostat. Please read this manual thoroughly before installation and use to ensure proper function and safety.
The Emerson 1E78-140 is designed for use with most single-stage heat-only systems, including 24-volt and millivolt systems. It is not compatible with electric baseboard heat or certain other systems.
Asennus ja asennus
Tarvittavat työkalut
- Ruuvimeisseli
- Poraa (jos tarvitaan uusia kiinnitysreikiä)
- Langanpoistajat (tarvittaessa)
Vanhan termostaatin irrottaminen
- Turn off power to your heating system at the main fuse or circuit breaker panel.
- Irrota vanhan termostaatin kansi.
- Ota kuva olemassa olevista johdotusliitännöistä viitteeksi.
- Disconnect the wires from the old thermostat terminals, noting which wire was connected to each terminal.
- Remove the old thermostat base from the wall.
Uuden termostaatin asennus
- Irrota etukansi termostaatin pohjasta.
- Position the new thermostat base on the wall. Use the provided screws and anchors to secure it.
Johdotus
Tärkeää: Ensure power is off before wiring. This thermostat is for 2-wire heat-only systems. Connect wires only to R and W terminals.
Refer to the wiring diagram below. Identify each wire attached to the old thermostat by taking a photo of old wiring.

Image: Wiring diagram for the Emerson 1E78-140 thermostat. It illustrates connections for 2-wire heat-only systems to R and W terminals. The image also shows two AAA Energizer batteries and various mounting screws and anchors included with the thermostat. A caution notice regarding battery life and freeze hazard is visible.
- Connect the wire from your heating system's R terminal to the R terminal on the thermostat.
- Connect the wire from your heating system's W terminal to the W terminal on the thermostat.
Akun asennus
The thermostat requires two AAA batteries for operation. Install the batteries into the compartment located on the back of the thermostat, observing the correct polarity (+/-).

Kuva: Edessä view of the Emerson 1E78-140 thermostat. The digital display shows "70" as the current temperature. To the right of the display are two gray buttons for adjusting the temperature up and down. Below the Emerson logo, a system switch is visible, set to "OFF HEAT".
After wiring and battery installation, attach the thermostat front cover to the base.
Turn on power to your heating system at the main fuse or circuit breaker panel.
Käyttöohjeet
Järjestelmän kytkin
The system switch is located on the front of the thermostat. It has two positions:
- OFF: Turns the heating system off.
- LÄMPÖ: Activates the heating system to maintain the set temperature.
Lämpötilan asettaminen
Use the Up (▲) and Down (▼) buttons located next to the digital display to adjust your desired temperature setting. The thermostat will maintain this temperature with a precision of plus/minus 1 degree Fahrenheit.
Taustavalo
The digital display features a backlight for improved visibility, especially in low-light conditions. The backlight activates when buttons are pressed.
Huolto
Akun vaihto
When the "Change Battery" indicator (a battery icon) is displayed on the screen, the batteries have limited remaining life and should be replaced soon. The system will not operate with dead batteries.
- Irrota termostaatin kansi.
- Poista vanhat AAA-paristot.
- Aseta kaksi uutta AAA-alkaliparistoa paikoilleen varmistaen oikea napaisuus.
- Aseta termostaatin kansi takaisin paikalleen.
Puhdistus
Puhdista termostaatti pehmeällä, damp kangas. Älä käytä hankaavia puhdistusaineita tai liuottimia.
Vianetsintä
| Ongelma | Mahdollinen syy | Ratkaisu |
|---|---|---|
| Näyttö on tyhjä tai himmeä. | Tyhjät tai vähissä akut. | Vaihda kaksi AAA-paristoa. |
| Lämmitysjärjestelmä ei käynnisty. |
|
|
| "Change Battery" icon displayed. | Alhainen akun teho. | Replace the two AAA batteries promptly. |
Tekniset tiedot
| Ominaisuus | Yksityiskohta |
|---|---|
| Merkki | Emerson |
| Mallinumero | 1E78-140 |
| Ohjaimen tyyppi | Painike |
| Erikoisominaisuus | Lämpötilan näyttö |
| Lämpötilan säätimen tyyppi | Manuaalinen |
| Mukana olevat komponentit | Thermostat, Temperature Sensor |
| Virtalähde | Electric (2 AAA batteries for display/control) |
| Voitage | 24 Volts (for system operation) |
| Näytön tyyppi | LED |
| Valvontamenetelmä | Kosketus (painikkeet) |
| Asennustyyppi | Seinäteline |
| Tyyli | Digitaalinen |
| Taustavalo | Kyllä |
| Yhteensopivuus | Suurin osa singleistätage heat-only systems (24V and millivolt). Not compatible with electric baseboard heat. |
| Tarkkuus | +/- 1 degree F |

Kuva: Puoli view of the Emerson 1E78-140 thermostat, held in a hand for scale. The image indicates the thermostat's height is 5.5 inches (14 cm).
Takuutiedot
Specific warranty details for the Emerson 1E78-140 thermostat are typically provided with the product packaging or can be obtained directly from the manufacturer, Emerson. Please refer to the documentation included in your product box or visit the official Emerson websivustolta löydät uusimmat takuuehdot.
Asiakastuki
For technical assistance, troubleshooting beyond this manual, or inquiries regarding your Emerson 1E78-140 thermostat, please contact Emerson customer support. Contact information can usually be found on the product packaging or on the official Emerson websivusto.





