Table of Contents
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Installation Instructions for
Heating & Air Conditioning
1F78
7 Day Programmable Thermostat
YOUR THERMOSTAT REPLACES
Typical System Compatibility Chart
620
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
No
Line Voltage Heating or Baseboard 110/240 Volt Systems
No
Millivolt Systems Floor or Wall Furnaces
Yes
12 VDC Mobile Home Application
Yes
Multistage Systems
No
Systems Exceding 30VAC, 1.5 Amp
No
2
THERMOSTAT DETAILS
90
90
W905
C p f r
Hydr
c
Sys m
AS
W904
c r c
as
C p f r
S
c
C s s D sp ay
Figure 1. Thermostat base
WHITE-RODGERS
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
www.white-rodgers.com
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
1
PREPARATIONS
Assemble tools required as shown below.
FLAT BLADE SCREWDRIVER
WIRE CUTTER/STRIPPER
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL—
THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY
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
CAUTION
!
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.
PART NO. 37-6522A
0404
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Table of Contents
Related Manuals for White Rodgers 1 F 78
Summary of Contents for White Rodgers 1 F 78
-
Page 1: Removing Old Thermostat
Installation Instructions for Heating & Air Conditioning 1F78 7 Day 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) -
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: Check Thermostat Operation
CHECK THERMOSTAT OPERATION CONTINUED FROM THIRD PAGE Before you begin programming 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: Configuration Menu
Step Displayed (Factory Default) Press Button(s) PRGM and RUN HOLD* HOLD* HOLD* HOLD* HOLD* * Press HOLD to advance to next item or TIME to move backwards to previous item The only way to restore this feature is to complete a software reset (see reset operation under “TROUBLESHOOTING”... -
Page 6: Heating/Cooling Times & Heating Temperatures
PROGRAMMING YOUR THERMOSTAT CONTINUED FROM FIFTH PAGE However, you may use the same heating and cooling tempera- tures for consecutive time periods. You can choose start times, heating temperatures, and cooling temperatures independently for each day programs (for example, you may select 5:00 AM and 70 as the 1st period heating start time and temperature on Monday, then select 7:00 AM and 76 as the 1st period cooling start time and temperature on Monday). -
Page 7: Enter Cooling Temperatures
NOTE If you are programming your thermostat for the first time, and you want programming for all days of the week to be the same as Monday’s program, press RUN or HOLD at this point, and proceed to the SELECT COOLING TEMPERATURES section (this simplified COPY DAY feature only works the first time you program your thermostat;... - Page 8 TROUBLESHOOTING CONTINUED FROM SEVENTH PAGE Symptom No Heat (continued) No Cool 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 Thermostat Does Not Follow Program...