White Rodgers 1F97W-51 User manual

All wiring must conform to local and national electrical
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.
To prevent electrical shock and/or equipment
damage, disconnect electric power to system at
mainfuseorcircuitbreakerboxuntilinstallation
is complete.
Do not use on circuits exceeding specified volt-
age. Higher voltage will damage control and
could cause shock or fire hazard.
Do not short out terminals on gas valve or pri-
marycontroltotest.Shortorincorrectwiringwill
burn out thermostat and could cause personal
injury and/or property damage.
Operator: Save these instructions for future use!
PART NO. 37-5093B
Replaces 37-5093A
9531
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
INSTALLATION INSTRUCTIONS
1F97W-51
7-Day Electronic Digital Thermostat
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398 Printed in U.S.A.
R
CONTENTS
Description......................................................... 1
Precautions........................................................ 1
Specifications..................................................... 2
Installation.......................................................... 2
New Installation
Select Thermostat Location
Route Wires to Location
Replacement Installation
Remove Old Thermostat
Attach Subbase to Wall
Attach Thermostat to Subbase
Operation ........................................................... 6
System Configuration
Electric Heat Systems
Energy Management Recovery (EMR)
Check Thermostat Operation
Fan Operation
Heating System
Cooling System
Troubleshooting
WHITE-RODGERS
This wall-mounted, low voltage thermostat maintains
room temperature by controlling the operation of heating
and cooling systems. The user may program up to four
time/temperature settings per 24 hour period. The ther-
mostatstoresindependentheatingandcoolingprograms
for each day of the week. The thermostat will store both
heating and cooling programs simultaneously. Three
“AA”Energizer®batterieswillmaintainthestoredprogram
forapproximatelyone year,ifincoming powershouldfail.
If power failure is extensive and the program is lost, after
powerrestoration,thethermostatwillautomaticallymain-
tain a factory preprogrammed heating temperature of
64°F or a cooling temperature of 82°F.
DESCRIPTION
PRECAUTIONS
Ifindoubtaboutwhetheryourwiringismillivolt,line,orlow
voltage, have it inspected by a qualified heating and air
conditioning contractor, electrician, or someone familiar
with basic electricity and wiring.
Do not exceed the specification ratings.
CAUTION
!
WARNING
!

2
SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
17 to 30 VAC 50/60 Hz.
0.05 to 1.5 Amps
1.5 Amps Maximum Total Load (All terminals
combined)
Anticipation:
Heating 2 to 40
Cooling 4 to 40
THERMAL DATA
Setpoint Temperature Range:
40°F to 99°F (4°C to 37°C)
Operating Ambient Temperature Range:
32°F to 105°F
Operating Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature Range:
-40°F to 150°F
APPLICATIONS
For use with:
• Standard heat/cool, heat-only, or cool-only sys-
tems
• Electric heat systems
• Gas or oil fired systems
• Gas systems with intermittent ignition devices
(I.I.D.) and/or vent dampers
Do not use with:
• Multi-stage systems
• Heat pump systems
• Systems exceeding 30 VAC and 1.5 Amps
ACCESSORIES
Thermostat Guard W. R. Part No. F29-0198 (clear) or
F29-0238 (opaque)
INSTALLATION
}Reference Values
NEW INSTALLATION
You should program the thermostat with batteries
installed before attaching on subbase. See OPERA-
TION GUIDE for programming instructions.
SELECT THERMOSTAT LOCATION
Proper location insures that the thermostat will provide a
comfortable building temperature. Observe the following
general rules when selecting a location:
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.
4. Avoid locations close to windows, adjoining outside
walls, or doors that lead outside.
5. Avoid locations close to air registers or in the direct
path of air from them.
6. Makesuretherearenopipes or ductworkinthatpart
of the wall chosen for the thermostat location.
7. Never locate thermostat in a room that normally
warmer or cooler than the rest of the building.
8. Avoid locations with poor air circulation, such as
behind doors or in alcoves.
ROUTE WIRES TO LOCATION
All wiring must conform with local and national electrical
codes and ordinances.
1. Probeforobstructionsinpartitionbeforedrilling1⁄2”
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 buildings without base-
ments, drill 1⁄2” hole through ceiling and into parti-
tion from above.
2. Through this hole drop a light chain, or 6” chain
attachedtoastrongcord.Snagcordinbasementwith
hooked wire. In buildings without basements, drop
cord through hole in ceiling and down partitioning;
snag cord at the thermostat location.
3. Attach thermostat wire to cord and pull wire through
hole in wall so that 6” of wire protrudes.
NOTE
Approximately
5 feet from floor
1
⁄
2
” hole for
thermostat wire
Stout cord with 6”
chain attached
Baseboard
strip moulding
1
⁄
4
” guide hole
for sighting
Quarter round
removed
3
⁄
4
” hole in floor of partition
Hooked wire for snagging chain
Figure 1. Routing thermostat wires

3
TABLE 1. OLD THERMOSTAT IDENTIFICATION
Type
1
Type
2
Type
3
Type
4
Type
5
4
RH
M
R5
R
W
W
H
4
W
RC
RC
V
Y
Y
C
Y6
Y
G
G
F
G
G
OLD
THERMOSTAT
TYPE
OLD THERMOSTAT
TERMINAL IDENTIFICATION
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
wiresstillattached,removewallplatefromthewall.
3. If the old thermostat has a wall mounting plate,
removethethermostatandthewallmountingplateas
an assembly.
4. FOR HEATING ONLY SYSTEMS — Disconnect the
two wires from the old thermostat. Skip steps 5
through7belowandproceedtoATTACHSUBBASE
TO WALL.
5. FOR HEATING/COOLING SYSTEMS — Before re-
moving wires from old thermostat, identify the termi-
nals that have wires attached on the old thermostat.
ThenuseTable1toidentifythetypeofthermostatyou
are replacing. For example, if the old thermostat has
wires attached to terminals R, W, Y, and G, the old
thermostat is a type 5 (note that the old thermostat
may not have wires attached to all the terminals
identified in Table 1).
6. Use the self-adhesive labels enclosed with your
new thermostat to identify the wires attached to
the old thermostat. The labels correspond to the
thermostattypenumberyouidentifiedinstep5above
(seeTable2).Forexample,ifyoudeterminedthatthe
old thermostat is a type 5, use the labels for the type
5 thermostat (you may not use all the labels for the
typenumberyou’veidentifiediftheoldthermostatdid
not have wires attached to all the terminals).
7. Labeleachwireasyoudisconnectit.Thelabelshave
both the old terminal markings and the new terminal
identification. Discard any unused labels. 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.
2. Pull wires through opening in the center of the sub-
base. DO NOT LET WIRES FALL BACK INTO
WALL.
3. Connect wires beneath terminal screws on sub-
base using appropriate wiring schematic (see figs.
3 through 8).
4. Place subbase over hole in wall and mark mounting
hole locations on wall using subbase as a template.
(Installation instructions continue on page 5.)
TABLE 2. WIRE IDENTIFICATION LABELS
Type
1
Type
2
Type
3
Type
4
Type
5
New Old
RH 4
New Old
RH RH
New Old
RH M
New Old
RH R5
New Old
RH R
New Old
W W
New Old
W W
New Old
W H
New Old
W 4
New Old
W W
New Old
RC RC
New Old
RC RC
New Old
RC V
New Old
Y Y
New Old
Y Y
New Old
Y C
New Old
Y Y6
New Old
Y Y
New Old
G G
New Old
G G
New Old
G F
New Old
G G
New Old
G G
G
RC
Mounting
hole
Pull wires through
this opening
Connect wires under
terminal screws
Mounting
hole
6-pin connector
2-pin connector
Y
W
Screw
anchors
Figure 3. Subbase
Activity
light
RH
PULL STRAIGHT OUT
Figure 2. Removing thermostat from subbase

4
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.
NOTE
CAUTION
!
RH
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 4. Typical wiring diagram for heat only, 2-wire, single transformer systems
TRANSFORMER
Heating
System
RC
G
RC
Y
W
RH
W
RH
Thermostat Terminal Connections
From heating system
From 24 VAC transformer
RH
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 5. Typical wiring diagram for heat only, 3-wire, single transformer systems
TRANSFORMER
RC
Fan
Relay Heating
System
JUMPER
WIRE
G
RC
Y
W
RH
W
RH
Thermostat Terminal Connections
G
From heating system
From 24 VAC
transformer
From fan relay
CONNECT red jumper
wire (provided)
NOTE
RED jumper wire (pro-
vided with thermostat)
must be connected be-
tween thermostat's RH
and RC terminals for pro-
per thermostat operation
with this system.
RC
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 6. Typical wiring diagram for cool only, 3-wire, single transformer systems
Fan
Relay
Cooling
System
RH
TRANSFORMER
G
RC
Y
W
RH
Thermostat Terminal Connections
G
From 24 VAC
transformer
From fan relay
From cooling system
RC
Y

5
5. Move subbase out of the way. Drill mounting holes.
6. Fasten subbase loosely to wall, as shown in fig. 3,
using two mounting screws. Place a level against
bottomofsubbase,adjustuntillevel,andthentighten
screws. (Leveling is for appearance only and will not
affectthermostatoperation.) Ifyouareusingexisting
mountingholes,orifholesdrilledaretoolargeanddo
not allow you to tighten subbase snugly, use plastic
expansion plugs to secure subbase.
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.
ATTACH THERMOSTAT TO SUBBASE
USE
SYSTEM
HEAT - OFF - COOL
TO TURN THERMOSTAT OFF BE-
FORE ATTACHING THERMOSTAT TO WALL.
FAILURETOTURNOFFTHERMOSTATBEFORE
ATTACHINGMAYCAUSEEQUIPMENTDAMAGE
DUE TO RAPID COMPRESSOR CYCLING.
CAUTION
!
To attach thermostat to subbase, line up the plastic snap
guides at the bottom of the thermostat and the two
connector pins on the thermostat with the connectors
nearthe bottom leftsection ofthe subbase(when viewed
fromthefront).Gentlypivotthethermostatup until thesix
pin connectors and the plastic snaps lock into place (see
fig. 9). Be gentle when attaching thermostat. If the
thermostatdoes not seemto be attachingto 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.
RH
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 7. Typical wiring diagram for heat/cool, 4-wire, single transformer systems
TRANSFORMER
Cooling
System Fan
Relay Heating System
RC
JUMPER
WIRE
G
RC
Y
W
RH
Thermostat Terminal Connections
G
From 24 VAC
transformer
From fan relay
From cooling system
Y
CONNECT red jumper
wire (provided)
W
RH
From heating system
NOTE
RED jumper wire (pro-
vided with thermostat)
must be connected be-
tween thermostat's RH
and RC terminals for pro-
per thermostat operation
with this system.
RH
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
HEATING TRANSFORMER
24 VAC 120 VAC
Hot
Neutral
COOLING TRANSFORMER
Cooling
System Fan Relay Heating System
RC
G
RC
Y
W
RH
Thermostat Terminal Connections
From fan relay
From heating
system
From 24 VAC
cooling transformer
From cooling
system
From 24 VAC
heating transformer
Figure 8. Typical wiring diagram for heat/cool, 5-wire, two-transformer system
RH
W
RC
G
Y
NOTE
This system does not
require RED jumper
wire (provided with
thermostat).
ENGAGE TWO LOWER GUIDES;
PIVOT UP
Figure 9. Attaching thermostat to subbase

6
Figure 10. Back of thermostat
2-pin Connector
6-pin Connector Batteries
W14 S3
OPERATION
SYSTEM CONFIGURATION
ELECTRIC HEAT SYSTEMS
For central electric heat systems where the blower is
energized by a separate circuit through the fan relay
(meaning that the fan turns on immediately on call for
heat),clipwireW14onthebackofthethermostat(seefig.
10).If the thermostat is energizingelectric heat sequenc-
ers, DO NOT clip wire W14.
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 energize the heating or
cooling 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 microcom-
puter calculates 15 minutes for every 2°F temperature
change). For example, assume that the thermostat is
programmedtoprovideanovernightheatingtemperature
of62°F,andduringthenextprogramperiod,scheduledto
begin at 6:00 AM, the programmed temperature is 70°F.
With EMR activated, the thermostat will automatically
energize the heating system at 5:00 AM, so that the
programmed temperature of 70°F is reached by about
6:00 AM.
ThethermostatisshippedwiththeEMRfeatureinactive,
whichmeansthatthethermostatwillenergizetheheating
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. 10).
CHECK THERMOSTAT OPERATION
If at any time during testing the system does not function
correctly, disconnect electrical power at the main fuse or
circuit breaker and check that all wiring is correct.
FAN OPERATION
1. Turn on power to the system. If the heat source has
a standing pilot, be sure to light it.
2. Press
FAN
ON - AUTO
until FAN ON is displayed. The blower
should begin to operate (this will work only on sys-
temswheretheGterminalisconnectedtotheblower
relay).
3. Press
FAN
ON - AUTO
until FAN AUTO is displayed. The
blower should stop operating within approximately
one minute.
HEATING SYSTEM OPERATION
1. Press
SYSTEM
HEAT - OFF - COOL
until HEAT isdisplayed (it mayalready
be displayed).
2. Press to adjust thermostat above room tem-
perature to call for heat. The heating system should
begin to operate.
NOTE

7
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNICIANS’ USE
ONLY.OPERATORSSHOULDNOTUSETHISFEA-
TURE DUE TO POSSIBILITY OF EQUIPMENT OR
PROPERTY DAMAGE, OR PERSONAL INJURY.
COMPRESSOR SHORT TERM
CYCLE PROTECTION
This thermostat has a built-in short term (5-minute)
time delay. During this 5-minute period, the thermo-
stat will lock out the compressor to allow head pres-
sure to stabilize. If you want to override this feature
whiletestingthermostatoperation, simplypress
VIEW
TEMP
and
VIEW
PRGM
buttons at the same time at initial startup.
DO NOT USE THE LOCKOUT BYPASS OPTION
UNLESSTHECOMPRESSOROILHEATERSHAVE
BEEN OPERATIONAL FOR 6 HOURS AND THE
SYSTEMHASNOT BEEN OPERATIONAL FOR AT
LEAST 5 MINUTES.
COOLING SYSTEM OPERATION
Topreventcompressorand/orpropertydamage,
if power to the compressor has been off or
interruptedformorethan 1 hour and the outdoor
temperature is below 50°F, DO NOT operate the
system for at least the amount of time the com-
pressor was off! This will allow the compressor
heaters to warm the compressor oils to avoid
damage due to slugging.
1. Press
SYSTEM
HEAT - OFF - COOL
until COOL is displayed.
2. Press to adjust thermostat below room tem-
perature to call for cool. The blower should come on
immediately, followed by cold air circulation. How-
ever, if the blower does not come on and the word
COOL is flashing, the compressor lockout feature is
operating (see Lockout Bypass Option to tempo-
rarily override the compressor lockout feature during
testing).
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.
CAUTION
!

If you need further information about this product, please write to:
WHITE-RODGERS
Division of Emerson Electric Co.
9797 Reavis Road
St. Louis, MO 63123-5398
ATTN: Technical Service Department