Emerson 1F78-151 - User Manual

The installation manual for the White Rodgers 1F78 programmable thermostat covers essential setup, operation, and troubleshooting for its use with heating and air conditioning systems. This guide highlights key areas like compatibility checks–including wiring diagrams for various HVAC setups–and detailed instructions for mounting, wiring, and programming the device. It also addresses critical safety considerations, such as electrical disconnection procedures and mercury handling, alongside practical features like energy management recovery settings and battery replacement guidance. The manual further includes troubleshooting steps for common issues like malfunctioning heating or cooling cycles, ensuring users can diagnose and resolve system problems effectively.

Page 1 – Installation Overview and System Compatibility
Page 2 – Thermostat Removal and Wiring Configuration
Page 3 – Wiring Diagrams and System Operation Checks
Page 4 – Thermostat Operation Features
Page 5 – Heating and Cooling Schedule Programming
Page 6 – Advanced Programming and Troubleshooting
Page 7 – Heating and Cooling System Troubleshooting
Page 8 – Company Contact Information
Page 9 – Customer Support and Legal Notices
Page 10 – System Troubleshooting Solutions
Page 11 – Schedule Setup Verification
Page 12 – Detailed Temperature Programming
Page 13 – Thermostat Operation Verification
Page 14 – Refrigeration and Heating Wiring Configurations
Page 15 – Device Installation and Electrical Safety
Page 16 – System Compatibility and Removal Guide

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Failure to follow and read all instructions carefully
before installing or operating this control could cause
personal injury and/or property damage

Installation Instructions for

Heating & Air Conditioning

1F78

5/2 Day Programmable Thermostat

CONTENTS

Preparations .................................................. 1
Thermostat Details ........................................ 1
Removing Old Thermostat ............................. 1
Mounting and Wiring ...................................... 2
Check Thermostat Operation ......................... 3
Programming your Thermostat ...................... 4
Specifications ................................................ 6
Troubleshooting ............................................. 6

THERMOSTAT DETAILS

HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED

FLAT BLADE SCREWDRIVER

WIRE CUTTER/STRIPPER

PREPARATIONS

To prevent electrical shock and/or equipment damage,
disconnect electrical power to the system at the main fuse
or circuit breaker until installation is complete.

CAUTION

Before removing wires from old thermostat’s switching subbase,
label each wire with the terminal designation it was removed
from.

Remove Old Thermostat: A standard heat/cool thermostat

consists of three basic parts:

a. The cover, which may be either a snap-on or hinge type.

b. The base, which is removed by loosening all captive screws.

c. The switching subbase, which is removed by unscrewing

the mounting screws that hold it on the wall or adaptor plate.

Shut off electricity at the main fuse box until installation is

complete. Ensure that electrical power is disconnected.

Remove the front cover of the old thermostat. With wires still

attached, remove wall plate from the wall. If the old thermostat
has a wall mounting plate, remove the thermostat and the wall
mounting plate as an assembly.

Identify each wire attached to the old thermostat.

Disconnect the wires from the old thermostat one at a time. DO

NOT LET WIRES FALL BACK INTO THE WALL.

Install new thermostat using the following procedures.

PART NO. 37-6614C

Replaces 37-6614B

1027

Assemble tools required below.

REMOVING OLD THERMOSTAT

Figure 1. Thermostat base

Mounting

hole

W903 Clip to

Disable EMR

Feature

W904 Clip for

Celsius Display

Mounting

hole

Electric/Gas

Switch

NOTE: Earlier models refer to 37-7006 for jumper locations.

W905 Clip for

Hydronic System

GAS

ELEC

W904

W905

W903

www.white-rodgers.com

www.emersonclimate.com

YOUR THERMOSTAT REPLACES

Typical System Compatibility Chart

1E78

Standard Heat Only Two Wire Gas or Oil Fired Systems (24 volt)

Yes

Electronic Ignition Heat Only Two Wire Systems (24 volt)

Yes

Electronic Ignition Heat Only Gas or Oil Fired Systems (24 volt)

Yes

Standard Heat/Cool Systems (24 volt)

Yes

Heat/Cool Systems Electric Heat (24 volt)

Yes

Heat Only Electric Heat Systems (24 volt)

Yes

Cool Only Systems (24 volt)

Yes

Heat Pump Systems (No Aux. or Emergency Heat)

Yes

Hot Water Zone Heat Only (Two Wire) Systems

Yes

Hot Water Zone Heat Only (Three Wire) Systems

Line Voltage Heating or Baseboard 110/240 Volt Systems

Millivolt Systems Floor or Wall Furnaces

Yes

12 VDC Mobile Home Application

Yes

Multistage Systems

Systems Exceeding 30VAC, 1.5 Amp

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About this manual

Brand: Emerson
Model: 1F78-151
Document type: User Manual
Category: Thermostat
Language(s): English, Spanish
Pages: 16
File size: 3.4 MB
Format: PDF

Other Manuals for Emerson 1F78-151

Manual

Summary

Page 1 - Installation Overview and System Compatibility

Introduction to the installation manual, including a table of compatible HVAC systems, a diagram of the thermostat base components, and initial instructions for removing the old thermostat with safety warnings.

Page 2 - Thermostat Removal and Wiring Configuration

Instructions for removing an existing thermostat, mounting and wiring a new one, terminal cross-reference charts, voltage warnings, Energy Management Recovery (EMR) settings, and battery replacement procedures.

Page 3 - Wiring Diagrams and System Operation Checks

Wiring diagrams for various heating and cooling systems, instructions for checking thermostat operation, fan tests, and a caution regarding operating the cooling system below 50°F.