White Rodgers 1F78 User Manual
Heating & air conditioning non-programmable thermostat
Hide thumbs
Also See for 1F78:
- Installation instructions manual (17 pages) ,
- Installation instructions manual (16 pages) ,
- Installation instructions manual (9 pages)
Table of Contents
Advertisement
Installation Instructions for
Heating & Air Conditioning
Non-Programmable Thermostat
YOUR THERMOSTAT REPLACES
Typical System Compatibility Chart
Standard Heat Only Two Wire Gas or Oil Fired Systems (24 volt)
Electronic Ignition Heat Only Two Wire Systems (24 volt)
Electronic Ignition Heat Only Gas or Oil Fired Systems (24 volt)
Standard Heat/Cool Systems (24 volt)
Heat/Cool Systems Electric Heat (24 volt)
Heat Only Electric Heat Systems (24 volt)
Cool Only Systems (24 volt)
Heat Pump Systems (No Aux or Emergency Heat)
Hot Water Zone Heat Only (Two Wire) Systems
Hot Water Zone Heat Only (Three Wire) Systems
Line Voltage Heating or Baseboard 110/240 Volt Systems
Millivolt Systems Floor or Wall Furnaces
12 VDC Mobile Home Application
Multistage Systems
Systems Exceding 30VAC, 1.5 Amp
2
THERMOSTAT DETAILS
-
Mounting
hole
W904
W905
W905
Clip for
Hydronic
System
W904
Clip for
Celsius Display
Figure 1. Thermostat base
1F78
1F78
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
No
No
Mounting
hole
+
-
+
W
RH
B
RC
G
O
Y
ELEC
GAS
Electric/Gas
Switch
White-Rodgers is a division
CONTENTS
Preparations .................................................. 1
Thermostat Details ........................................ 1
Removing Old Thermostat ............................ 1
Mounting and Wiring ..................................... 2
Check Thermostat Operation ........................ 3
Specifications ................................................ 5
Troubleshooting ............................................ 5
1
PREPARATIONS
Assemble tools required as shown below.
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
Failure to follow and read all instructions carefully
before installing or operating this control could cause
personal injury and/or property damage
3
REMOVING OLD THERMOSTAT
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.
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 using the
labels enclosed with the new 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.
of Emerson Electric Co.
www.white-rodgers.com
FLAT BLADE SCREWDRIVER
WIRE CUTTER/STRIPPER
CAUTION
!
PART NO. 37-6615A
0435
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for White Rodgers 1F78
Summary of Contents for White Rodgers 1F78
-
Page 1: Removing Old Thermostat
Installation Instructions for Heating & Air Conditioning 1F78 Non-Programmable Thermostat YOUR THERMOSTAT REPLACES Typical System Compatibility Chart Standard Heat Only Two Wire Gas or Oil Fired Systems (24 volt) Electronic Ignition Heat Only Two Wire Systems (24 volt) Electronic Ignition Heat Only Gas or Oil Fired Systems (24 volt) -
Page 2: Mounting And Wiring
REMOVING OLD THERMOSTAT CONTINUED FROM FIRST PAGE ATTENTION! This product does not contain mercury. How- ever, this product may replace a unit which contains mercury. Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into a container which can be sealed. -
Page 3: Check Thermostat Operation
MOUNTING AND WIRING CONTINUED FROM SECOND PAGE Heating Relay System NOTE For 2-wire Heat only, attach to RH and W Figure 2. Typical wiring diagram for heat only, 3-wire, single transformer systems Cooling System Relay Figure 3. Typical wiring diagram for cool only, 3-wire, single transformer systems NOTE RED jumper wire (provided with thermostat) must be... -
Page 4: Display View
CHECK THERMOSTAT OPERATION CONTINUED FROM THIRD PAGE Before you begin using your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat cover and the base. To remove the cover, gently pull it straight out from the base. -
Page 5: Specifications
SPECIFICATIONS ELECTRICAL DATA Electrical Rating: 0 to 30 VAC 50/60 Hz. or D.C. 0.05 to 1.0 Amps (Load per terminal) 1.5 Amps Maximum Total Load (All terminals combined) TROUBLESHOOTING Reset Operation If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermo- stat by pressing at the same time while moving... - Page 6 TROUBLESHOOTING CONTINUED FROM FIFTH PAGE Symptom Heat, Cool or Fan Runs Constantly. Furnace Cycles Too Fast or Too Slow (narrow or wide temperature swing) Cooling Cycles Too Fast or Too Slow (narrow or wide temperature swing) Thermostat Setting and Thermostat Thermometer Disagree Blank Display and/or Keypad Not Responding...
Need help?
Do you have a question about the 1F78 and is the answer not in the manual?
Questions and answers
There is no C wire which is a common wire and usually blue color, but the blue wire connected to Y port which is a cooling, did not find Y wire which usually for cooling, confused a lot, also trying to find out common wire. Please give me any solution
The White Rodgers 1F78 thermostat does not require a C (common) wire for standard operation. It is compatible with 2-wire heat-only systems, 3-wire single transformer systems, and 5-wire two-transformer systems. If no C wire is available, the thermostat can still function using battery power.
This answer is automatically generated
Hello. My furnace isn’t coming on all the time. I’m a mechanical maintenance technician by trade with a fair amount electrical knowledge. That being said, here is what I found. Input voltage is good. I found a wire on J3 that was not landed properly. It was only making contact on the end from pressure from the harness. I addressed this issue but it still had an erratic operation. The known history from the owner is she was shown to clean the thermocoupler. I will be replacing this but it seems to work when the thermostat is switched off and on erratically. I’m trying to “catch” it during a malfunction. I will be doing a reset as well.
A voltage spike or static discharge could cause erratic operation in a White Rodgers 1F78 thermostat, even if the input voltage and wiring are correct. In such cases, resetting the thermostat by pressing the up and down arrows simultaneously while moving the system switch from "Off" to "Heat" may restore normal operation. If the issue persists after resetting, professional service may be required.
This answer is automatically generated
My thermostat will not go above 62 deg on heat or below 85 deg on cool. This happened after it received a static spark. What should i do? Can I kill the power and/or reset it?
If your White Rodgers 1F78 thermostat is stuck at 62°F on heat and 85°F on cool after a static spark, you can reset it by pressing the up and down arrows at the same time while moving the system switch from OFF to HEAT. This resets the thermostat to factory defaults. If the thermostat has power, has been reset, and still does not function correctly, contact a heating/cooling service professional. Simply killing the power may not reset the thermostat properly.
This answer is automatically generated
what wifi smart thermostat replaces the model #1F78?
What does clipping mean? trying to change to Celsius
My thermostat does nothing when pressing any button. That includes trying to reset to the default settings. I have replaced the batteries
How do you turn off the hold on the thermastat
my thermostat is changing the cooling settings on its own. i set 71 it goes to 84