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1F90-60  
5-Day/2-Day Electronic Digital Thermostat (for  
Heating Only Systems)  
WHITE-RODGERS  
INSTALLATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY  
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE  
PERSONAL INJURY AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
This wall-mounted, low voltage thermostat maintains  
room temperature by controlling the operation of heating  
systems. Theusermayprogramuptofourtime/tempera-  
ture settings per 24 hour period. The thermostat stores  
independent heating programs for 5-day (weekday) and  
2-day (weekend) periods. Three "AA" Energizer® batter-  
ies will maintain the stored program for approximately  
one year, if incoming power should fail. If power failure is  
extensiveandtheprogramislost,afterpowerrestoration,  
the thermostat will automatically maintain a factory  
preprogrammed heating temperature of 64°F.  
PRECAUTIONS  
Ifindoubtaboutwhetheryourwiringismillivolt,line,orlow Do not exceed the specification ratings.  
voltage, have it inspected by a qualified heating and air  
conditioning contractor, electrician, or someone familiar All wiring must conform to local and national electrical  
with basic electricity and wiring.  
codes and ordinances.  
This control is a precision instrument, and should be  
handled carefully. Rough handling or distorting compo-  
nents could cause the control to malfunction.  
CONTENTS  
CAUTION  
!
Description ......................................................... 1  
Precautions ........................................................ 1  
Specifications..................................................... 2  
Installation.......................................................... 2  
New Installation  
To prevent electrical shock and/or equipment  
damage, disconnect electric power to system, at  
mainfuseorcircuitbreakerbox,untilinstallation  
is complete.  
Select Thermostat Location  
Route Wires to Location  
WARNING  
!
Replacement Installation  
Remove Old Thermostat  
Attach Subbase to Wall  
Do not use on circuits exceeding specified volt-  
age. Higher voltage will damage control and  
could cause shock or fire hazard.  
Attach Thermostat to Subbase  
Operation ........................................................... 5  
System Configuration  
Energy Management Recovery (EMR)  
Check Thermostat Operation  
Heating System  
Do not short out terminals on gas valve or pri-  
marycontroltotest. Shortorincorrectwiringwill  
burn out thermostat and could cause personal  
injury and/or property damage.  
Troubleshooting  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
ST. LOUIS, MISSOURI 63123-5329  
PART NO. 37-5109A  
Printed in U.S.A.  
9151  
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SPECIFICATIONS  
ELECTRICAL DATA  
APPLICATIONS  
Electrical Rating:  
For use with:  
17 to 30vAC 50/60 Hz.  
0.05 to 1.5 Amps  
1.5 Amps Maximum Total Load (All terminals  
combined)  
• Standard two-wire heat-only systems  
• Gas or oil fired systems  
• Millivolt systems  
• 3-wire zone valve systems  
Do not use with:  
Anticipation:  
Heating 2 to 40 (Reference Values)  
• Multi-stage systems  
• Heat pump systems  
THERMAL DATA  
• Systems exceeding 30v AC and 1.5 Amps  
Setpoint Temperature Range:  
40°F to 99°F (4°C to 37°C)  
Operating Ambient Temperature Range:  
32°F to 105°F  
ACCESSORIES  
Thermostat Guard W. R. Part No. F29-0198 (clear) or  
F29-0238 (opaque)  
Operating Humidity Range:  
0 to 90% RH (non-condensing)  
Shipping Temperature Range:  
-40°F to 150°F  
INSTALLATION  
NEW INSTALLATION  
1. Probe for obstructions in partition before drilling 1/2"  
hole in wall at selected location. Take up quarter  
round and drill a small guide hole for sighting (see fig.  
1). From basement, drill 3/4" hole in partition floor  
next to guide hole. In basementless buildings, drill  
1/2"holethroughceilingandintopartitionfromabove.  
You should program the thermostat with batteries  
installed before attaching on subbase. See OPERA-  
TION GUIDE for programming instructions.  
SELECT THERMOSTAT LOCATION  
2. Through this hole drop a light chain, or 6" chain  
attached to a strong cord. Snag cord in basement  
with hooked wire. In basementless buildings, drop  
cord through hole in ceiling and down partitioning;  
snag cord at the thermostat location.  
Proper location insures that the thermostat will provide a  
comfortable building temperature. Observe the following  
general rules when selecting a location:  
3. Attach thermostat wire to cord and pull wire through  
hole in wall so that 6" of wire protrudes.  
1. Locate thermostat about 5 ft. above the floor.  
2. Install thermostat on a partitioning wall, not on an  
outside wall.  
3. Never expose thermostat to direct light from lamps,  
sun, fireplaces or any temperature radiating equip-  
ment.  
1/2" HOLE FOR  
THERMOSTAT WIRE  
4. Avoid locations close to windows, adjoining outside  
walls, or doors that lead outside.  
STOUT CORD WITH 6"  
CHAIN ATTACHED  
5. Avoid locations close to air registers or in the direct  
path of air from them.  
APPROXIMATELY  
BASEBOARD  
STRIP MOLDING  
5 FEET  
6. Make sure there are no pipes or duct work in that part  
of the wall chosen for the thermostat location.  
1/4" GUIDE HOLE  
FOR SIGHTING  
7. Never locate thermostat in a room that normally  
warmer or cooler than the rest of the building.  
QUARTER ROUND  
REMOVED  
8. Avoid locations with poor air circulation, such as  
behind doors or in alcoves.  
ROUTE WIRES TO LOCATION  
3/4" HOLE IN FLOOR OF PARTITION  
NOTE  
HOOKED WIRE FOR SNAGGING CHAIN  
All wiring must conform with local and national electrical  
codes and ordinances.  
Figure 1. Routing Thermostat Wires  
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6. Fasten subbase loosely to wall, as shown in fig. 3,  
using two mounting screws. Place a level against  
bottom of subbase, adjust until level, and then tighten  
screws. (Leveling is for appearance only and will not  
affect thermostat operation.) If you are using existing  
mounting holes, or if holes drilled are too large and do  
not allow you to tighten subbase snugly, use plastic  
expansion plugs to secure subbase.  
REPLACEMENT INSTALLATION  
REMOVE OLD THERMOSTAT  
1. Shut off electricity at the main fuse box until installa-  
tion is complete. Verify power is off with a voltmeter.  
2. Remove the front cover of the old thermostat. With  
wires still attached, remove wall plate from the wall.  
7. Push excess wire into wall and plug hole with a fire-  
resistant material (such as fiberglass insulation) to  
prevent drafts from affecting thermostat operation.  
3. If the old thermostat has a wall mounting plate,  
removethethermostatandthewallmountingplateas  
an assembly.  
4. Label each wire as you disconnect it. PULL AT  
LEAST SIX INCHES OF WIRE OUT OF THE WALL  
WHEN YOU DISCONNECT IT - DO NOT ALLOW  
THE WIRES TO FALL BACK INTO THE WALL.  
ATTACH SUBBASE TO WALL  
1. Remove the packing material from the thermostat.  
Place the fingers of one hand on the center top and  
bottom portion of the thermostat. Grasp the subbase  
in the other hand on the top and bottom center, and  
gentlypullstraightout(seefig.2). Thethermostathas  
pin and socket connectors. Forcing or prying on the  
thermostat will cause damage to the unit.  
PULL STRAIGHT OUT  
Figure 2. Removing thermostat from subbase  
Expansion  
Plugs  
Connect wires under  
terminal screws  
2. Pull wires through opening in the center of the sub-  
base. DO NOT LET WIRES FALL BACK INTO  
WALL.  
Activity  
Mounting  
Hole  
Light  
W
6
6-pin Connector  
MV  
Mounting  
Hole  
3. Connect wires beneath terminal screws on subbase  
using appropriate wiring schematic (see figs. 3 through  
6).  
RH  
4. Place subbase over hole in wall and mark mounting  
hole locations on wall using subbase as a template.  
5. Move subbase out of the way. Drill mounting holes.  
Pull wires through  
this opening  
Figure 3. Subbase  
NOTE  
CAUTION  
!
All wiring diagrams are for typical systems only. Refer to  
equipment manufacturers' instructions for specific sys-  
tem wiring information.  
To prevent electrical shock and/or equipment  
damage, disconnect electrical power at the main  
fuse box or circuit breaker until installation is  
complete.  
From heating system  
From 24vAC transformer  
THERMOSTAT  
SYSTEM  
6
MV  
W
RH  
6
W
MV  
Heating  
System  
Hot  
24vAC  
120vAC  
RH  
Neutral  
Thermostat Terminal Connections  
TRANSFORMER  
Figure 4. Typical Wiring Diagram for Heating Only, 2-Wire, Single Transformer Systems  
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From millivolt system  
THERMOSTAT  
SYSTEM  
6
MV  
W
RH  
6
W
MV  
Millivolt  
System  
RH  
From millivolt system  
Thermostat Terminal Connections  
Figure 5. Typical Wiring Diagram for Millivolt Systems  
From zone valve  
THERMOSTAT  
SYSTEM  
6
W
6
MV  
W
RH  
MV  
6
1
4
2
5
Zone  
Valve  
Hot  
24vAC  
120vAC  
RH  
From 24vAC transformer  
(through zone valve)  
Neutral  
TRANSFORMER  
Thermostat Terminal Connections  
Figure 6. Typical Wiring Diagram for Heat Only, 3-Wire, Zone Valve Systems  
ATTACH THERMOSTAT TO SUBBASE  
CAUTION  
!
POWER TO THERMOSTAT MUST BE OFF BE-  
FORE ATTACHING THERMOSTAT TO WALL.  
FAILURE TO TURN OFF POWER BEFORE AT-  
TACHING THERMOSTAT MAY CAUSE EQUIP-  
MENT DAMAGE DUE TO RAPID COMPRESSOR  
CYCLING.  
To attach thermostat to subbase, line up the plastic snap  
guides at the top of the thermostat and the six connector  
pins on the thermostat with the connectors near the top of  
the subbase. Gently pivot the thermostat down until the  
plastic snaps lock into place (see fig. 7). Be gentle when  
attaching thermostat. If the thermostat does not seem  
to be attaching to the subbase easily, make sure that the  
connector pins and plastic snaps are properly aligned,  
and that excess wire is pushed into the wall. Damage to  
the thermostat may occur if force is used.  
ENGAGE TWO UPPER GUIDES;  
PIVOT DOWN  
Figure 7. Attaching thermostat to subbase  
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OPERATION  
Batteries  
6-pin Connector  
SYSTEM CONFIGURATION  
ENERGY MANAGEMENT RECOVERY  
(EMR)  
When the EMR feature is activated, the thermostat's  
microcomputer automatically calculates the time it will  
take to change the temperature to the next program  
setting. Then the thermostat will activate the heating  
system to change the temperature so that the desired  
temperature is reached at or near the beginning of the  
next program period (the thermostat's microcomputer  
calculates15minutesforevery2°Ftemperaturechange).  
For example, assume that the thermostat is programmed  
to provide an overnight heating temperature of 62°F, and  
during the next program period, programmed to begin at  
6:00 AM, the programmed temperature is 70°F. With  
EMR activated, the thermostat will automatically activate  
the heating system at 5:00 AM, so that the programmed  
temperature of 70°F is reached by about 6:00 AM.  
Figure 8. Back of Thermostat  
The thermostat is shipped with the EMR feature inactive,  
which means that the thermostat will activate the heating  
or cooling system at, not before, the beginning of the  
program period (real time).  
To activate the EMR function, clip wire S3 on the back  
of the thermostat (see fig. 8).  
CHECK THERMOSTAT OPERATION  
If at any time during testing the system does not function  
correctly, disconnectelectricalpoweratfuseboxorcircuit  
breaker and check that all wiring is correct.  
HEATING SYSTEM  
SYSTEM  
SWITCH  
1. Press  
until HEAT is displayed (it may al-  
ready be displayed).  
2. Press to adjust thermostat above room tem-  
perature to call for heat. The heating system should  
begin to operate.  
Refer to the OPERATION GUIDE if you need additional  
information on thermostat operation.  
TROUBLESHOOTING  
Refer to the Question & Answer section of the OPERA-  
TION GUIDE for information on troubleshooting the ther-  
mostat.  
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If you need further information about this product, please write to:  
WHITE-RODGERS  
Division of Emerson Electric Co.  
9797 Reavis Road  
St. Louis, MO 63123-5329  
ATTN: Technical Service Department  
WARRANTY INFORMATION  
THISWARRANTYSTATEMENTSUPERSEDESALLWARRANTY  
STATEMENTS DATED PRIOR TO MARCH 1, 1988.  
This warranty extends only to persons or organizations who  
purchase the Products for resale. THE FOREGOING CONSTI-  
TUTES SELLER’S SOLE RESPONSIBILITY UNDER THIS WAR-  
RANTY, AND PURCHASER’S EXCLUSIVE REMEDY FOR  
BREACH THEREOF. EXCEPT AS OTHERWISE EXPRESSLY  
SET FORTH IN THIS AGREEMENT, THERE ARE NO OTHER  
WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MER-  
CHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR  
OTHERWISE. SELLER SHALL NOT BE LIABLE FOR ANY  
SPECIAL,INDIRECT,INCIDENTALORCONSEQUENTIALDAM-  
AGES IN CONNECTION WITH THE SALE, RESALE OR USE OF  
THE PRODUCTS.  
White-Rodgers Division of Emerson Electric Co. (“Seller”) war-  
rants that its products purchased for resale (the “Products”) will be  
free from defects in material and workmanship under normal use  
and service for a period of twelve (12) months from date of  
installation. Seller’sobligationunderthiswarranty,andPurchaser’s  
exclusive remedy for the breach thereof, shall be limited to, at  
Seller’s option, Seller’s replacement of any defective Product  
F.O.B.Seller’sfactory,orSeller’sissuanceofacreditintheamount  
of the purchase price of such Product for resale as described  
below. Seller shall have the option of requiring the return of any  
defective Product, transportation charges prepaid, before recog-  
nizing any claim. This warranty shall not apply to any Product (1)  
which has been repaired or altered outside Seller’s factory or by  
other than Seller in any manner so as, in Seller’s judgement, to  
affect its serviceability or proper operation; (2) which has been  
subjected by persons other than Seller to improper handling,  
operation, maintenance, repair or alteration; or (3) which has been  
subjected to misuse, negligence, or accident.  
Complete warranty information and instructions for replacing/  
returning warranty products can be found in the White-Rodgers  
Product Catalog, or by telephoning or writing to:  
White-Rodgers Division  
Emerson Electric Co.  
9797 Reavis Road  
St. Louis, Missouri 63123-5329  
(314) 577-1300  
WARRANTY INFORMATION FOR CONSUMERS  
When you purchase a White-Rodgers Division product, it is typi-  
cally for replacement of a device which has failed on existing  
residential or commercial equipment, or a component of new  
equipment purchased for modernization.  
While our warranty does not extend to you, your contractor or  
dealer is protected by a one-year product warranty from White-  
Rodgers. Your supplier can rely on a nearby White-Rodgers  
wholesaler for prompt credit or replacement.