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Emerson Commercial & Residential Solutions
1E78-151

1E78-151

Product catalog summary

Overview: The document provides technical specifications and features of the 70 Series thermostats by White-Rodgers, designed for residential single-stage and heat pump applications. These thermostats are an upgrade from mechanical models and are compatible with both fossil fuel and electric systems.

Features:

Compatibility with fossil fuel or electric systems.
Large LCD with backlight for easy reading.
Selectable temperature display in Celsius or Fahrenheit.
Includes B/O terminals for enhanced connectivity.
Electronic accuracy for precise temperature control.

Specifications:

Electrical Rating: 20 to 30 VAC, NEC Class II, 50/60 Hz.
Terminal Load: 1.0 A per terminal, 1.5 A maximum all terminals combined.
Setpoint Range: 45 to 90°F (7 to 32°C).
Rated Differentials for Single Stage Models: Heat (0.8°F Fast, 1.5°F Slow), Cool (1.2°F Fixed), Heat Pump (1.2°F Fast, 1.5°F Slow), Aux./Emer. Heat (0.8°F Fast, 1.2°F Slow).
Operating Ambient: 32 to +105°F (0 to +41°C).
Operating Humidity: 90% non-condensing max.
Shipping Temperature Range: -4 to +150°F (-20 to 65°C).
Dimensions: 3 13/16”H x 5 1/8”W x 1 1/8”D for model 1F78, 5 5/16”H x 3 3/16”W x 1 1/8”D for model 1E78.

Parts and Accessories:

Wallplates for various models with adaptors for horizontal or vertical junction boxes.
Thermostat guards available for additional protection.

Model Applications:

Heat Pump Thermostats: Models like 1F72-151 and 1F79-111 offer features such as programmable fan, energy management recovery, and keypad lockout.
Single Stage Thermostats: Models like 1F78-151 and 1E78-140 provide options for gas/oil/electric systems with features like memory backup and lighted display.

Technical Help: Wiring diagrams and configuration details are available on pages 162-164 for various models.

Catalog excerpts

24 VOLT 70 SERIES HEAT PUMP – SINGLE STAGE THERMOSTATS Residential Single Stage and Heat Pump Applications. 70 Series are the Perfect Upgrade from Mechanical Thermostats. Covers Wall Marks Left by Most Mechanical Thermostats the Need for an Extra Wall Plate FEATURES • Fossil fuel or electric compatible. • Large LCD with backlight. • Selectable Celsius or Fahrenheit temperature display. • Includes B/O terminals. • Electronic accuracy. Electrical Rating: Hardwire . . . . . . . . . . . . . . . . . . . . . . . . . 20 to 30 VAC, NEC Class II, 50/60 Hz Batterry Power . . . . . . . . . . . . . . . . . . . . . 20 to 30 VAC, NEC Class II Terminal Load . . . . . . . . . . . . . . . . . . . . . 1.0 A per terminal, 1.5 A maximum all terminals combined Setpoint Range . . . . . . . . . . . . . . . . . . . . 45 to 90°F (7 to 32°C) Rated Differentials - Single Stage Models: Fast Slow Heat (Single Stage) . . . . . . . . . . . . . . . 0.8°F 1.5°F Cool (Single Stage) Fixed . . . . . . . . . . . 1.2°F Heat Pump . . . . . . . . . . . . . . . . . . . . . . 1.2°F 1.5°F Aux./Emer. Heat . . . . . . . . . . . . . . . . . . 0.8°F 1.2°F Operating Ambient . . . . . . . . . . . . . . . . . . 32 to +105°F (0 to +41°C) Operating Humidity . . . . . . . . . . . . . . . . . 90% non-condensing max. Shipping Temperature Range . . . . . . . . . -4 to +150°F (-20 to 65°C) Dimensions . . . . . . . . . . . . . . . . . . . . . . . 313/16”H x 51/8”W x 11/8”D – (1F78) 55/16”H x 33/16”W x 11/8”D – (1E78) See end of thermostats section for additional parts and accessories • F61-2510 — Wallplate for 1F models with adaptor for horizontal or vertical junction box 61/2”W x 41/2”H • F61-2593 — Wallplate for 1D70, 1E70 models with adaptor for horizontal or vertical junction box 41/2”W x 619/32”H • Thermostat Guards — see pages

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White-Rodgers 70 SERIES THERMOSTATS HEAT PUMP THERMOSTATS - 70 SERIES THERMOSTATS THERMOSTATS Single Stage SINGLE STAGE THERMOSTATS - 70 SERIES THERMOSTATS Single Stage * H = Hardwired (Requires Common) B = Battery Powered ♦ Heat Pump for Stage 1, and Gas / Oil / Electric for 2nd stage / Emergency x Available in vertical style order 1E78-144/151 *** Optional Continuous Display Light w/ Hardwire connection See page 162 See page 163 See page 164

Open the catalog to page 2

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