White Rodgers 1F78H - User Manual

Installation Instructions for
Heating & Air Conditioning
1F78H
5/2 Day Programmable Thermostat
CONTENTS
Preparations.................................................. 1
Thermostat Details ........................................ 1
Removing Old Thermostat ............................ 1
Mounting and Wiring ..................................... 2
Check Thermostat Operation ........................ 3
Configuration Menu....................................... 4
Programming your Thermostat ..................... 5
Specifications ................................................ 7
Troubleshooting ............................................ 8
PREPARATIONS
THERMOSTAT DETAILS
REMOVING OLD THERMOSTAT
Before removing wires from old thermostat’s switching subbase,
label each wire with the terminal designation it was removed from.
1. 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.
2. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
3. 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.
4. Identify each wire attached to the old thermostat.
5. Disconnect the wires from the old thermostat one at a time.
DO NOT LET WIRES FALL BACK INTO THE WALL.
6. Install new thermostat using the following procedures.
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
!
Printed in U.S.A.
PART NO. 37-6448A
0247
WHITE-RODGERS
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
www.white-rodgers.com
Failure to follow and read all instructions carefully
before installing or operating this control could cause
personal injury and/or property damage
Assemble tools required as shown below.
YOUR THERMOSTAT REPLACES
1
2
3
WIRE CUTTER/STRIPPER
Typical System Compatibility Chart 1F78H
Standard Heat Only 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 Systems No
Hot Water Zone Heat Only (Three Wire) Systems No
Line Voltage Heating or Baseboard 110/240 Volt Systems No
Millivolt Systems Floor or Wall Furnaces No
12 VDC Mobile Home Application No
Multistage Systems No
Systems Exceeding 30VAC, 1.5 Amp No
* Requires common wire for 24VAC at the thermostat
W
RH
BRC
GC
O
Y
GAS
ELEC
W904
W905
Figure 1. Thermostat base
Mounting
hole
Mounting
hole
W905
Clip for
Hydronic
System
W904
Clip for
Celsius Display
Electric/Gas
Switch
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
FLAT BLADE SCREWDRIVER
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL—
THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY

Summary

Preparations

Removing Old Thermostat

Mounting and Wiring

Attach Thermostat Base to Wall

Check Thermostat Operation

Cooling System Operation

Steps to check if the cooling system is functioning correctly after installation.

Heating System Operation

Procedure to verify the heating system operates as expected after installation.

Configuration Menu

Compressor Lockout

Programming Your Thermostat

Entering Your Program

Steps to guide the user through setting up heating and cooling schedules.

Set Current Time and Day

Instructions for setting the current time and day on the thermostat.

Enter Heating Program

Detailed steps for setting weekday and weekend heating start times and temperatures.

Enter Cooling Temperatures

Procedure for setting weekday and weekend cooling start times and temperatures.

Check Your Programming

Troubleshooting

Reset Operation

No Heat;No Cool;No Fan Issues

Common problems and their corrective actions for no heat, no cool, or no fan operation.

No Heat (Continued)

Further troubleshooting steps and diagnostic checks for no heat conditions.

No Cool Issues

Troubleshooting steps for cooling system not working, including delays.

Constant Running Issues

Display;Keypad Not Responding

White Rodgers 1F78H Specifications

General

Stages	1 Heat/1 Cool
Color	White
Compatibility	Single-stage heating and cooling systems
Display	Digital LCD
Power Source	Battery (2 x AA)
Voltage	24VAC
Temperature Control	±1°F
Backup	2 AA batteries