White Rodgers 37 5086A Thermostat User Manual

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1F90-71  
5-Day/2-Day Electronic Digital Thermostat  
WHITE-RODGERS  
INSTALLATION INSTRUCTIONS  
Operator: Save these insructions 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  
and cooling systems. The user may program up to four  
time/temperature settings per 24 hour period. The ther-  
mostat stores independent heating and cooling programs  
for 5-day (weekday) and 2-day (weekend) periods. The  
thermostat will store both heating and cooling programs  
simultaneously.Three“AA”Energizer® batterieswillmain-  
tain the stored program for approximately one year, if  
incoming power should fail. If power failure is extensive  
and the program is lost, after power restoration, the  
thermostat will automatically maintain a factory  
preprogrammed heating temperature of 64°F or a cooling  
temperature of 82°F.  
PRECAUTIONS  
Ifindoubtaboutwhetheryourwiringismillivolt,line,orlow Do not exceed the specification ratings.  
voltage, have it inspected by a qualified heating and air  
All wiring must conform to local and national electrical  
codes and ordinances.  
conditioning contractor, electrician, or someone familiar  
with basic electricity and wiring.  
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  
main fuse or circuit breaker box, until installation  
is complete.  
Select Thermostat Location  
Route Wires to Location  
Replacement Installation  
WARNING  
!
Remove Old Thermostat  
Attach Subbase to Wall  
Attach Thermostat to Subbase  
Operation ........................................................... 6  
System Configuration  
Do not use on circuits exceeding specified volt-  
age. Higher voltage will damage the control and  
could cause shock or fire hazard.  
A. Set Group A Option Switches  
B. Set Group B Option Switches  
C. Electric Heat Systems  
Donotshortoutterminalsongasvalveorprimary  
control to test. Short or incorrect wiring will burn  
out thermostat and could cause personal injury  
and/or property damage.  
Check Thermostat Operation  
Fan Operation  
Heating System  
Cooling System  
Troubleshooting  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
PART NO. 37-5086B  
Printed in U.S.A.  
Replaces 37-5086A  
9517  
ST. LOUIS, MISSOURI 63123-5398  
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SPECIFICATIONS  
ELECTRICAL DATA  
Electrical Rating:  
APPLICATIONS  
For use with:  
• Standard heat/cool or heat-only systems  
• Three-wire zone valve systems  
• Millivolt systems  
• 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  
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  
Reference Values  
}
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  
• Systems exceeding 30 VAC and 1.5 Amps  
ACCESSORIES  
Remote Sense Kit W. R. Part No. F145-1049  
Thermostat Guard W. R. Part No. F29-0198 (clear)  
or F29-0238 (opaque)  
INSTALLATION  
1. Probe for obstructions in partition before drilling 1⁄  
”
2
NEW INSTALLATION  
hole in wall at selected location. Take up quarter  
You should program the thermostat with batteries  
installed before attaching on subbase. See OPERA-  
TION GUIDE for programming instructions.  
round and drill a small guide hole for sighting (see  
3
fig. 1). From basement, drill ⁄  
4
” hole in partition  
floor next to guide hole. In buildings without base-  
ments, drill 1⁄  
2
” hole through ceiling and into parti-  
SELECT THERMOSTAT LOCATION  
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.  
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. Attach thermostat wire to cord and pull wire through  
hole in wall so that 6” of wire protrudes.  
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.  
1
⁄ ” hole for  
2
thermostat wire  
5. Avoid locations close to air registers or in the direct  
path of air from them.  
Stout cord with 6”  
chain attached  
6. Make sure there are no pipes or duct work in that part  
of the wall chosen for the thermostat location.  
Approximately  
5 feet from floor  
Baseboard  
strip moulding  
1
⁄ ” guide hole  
4
7. Never locate thermostat in a room that normally  
warmer or cooler than the rest of the building.  
for sighting  
Quarter round  
removed  
8. Avoid locations with poor air circulation, such as  
behind doors or in alcoves.  
ROUTE WIRES TO LOCATION  
3
⁄ ” hole in floor of partition  
4
NOTE  
Hooked wire for snagging chain  
All wiring must conform with local and national electrical  
codes and ordinances.  
Figure 1. Routing thermostat wires  
2
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TABLE 1. OLD THERMOSTAT IDENTIFICATION  
REPLACEMENT INSTALLATION  
OLD  
OLD THERMOSTAT  
THERMOSTAT  
REMOVE OLD THERMOSTAT  
TERMINAL IDENTIFICATION  
TYPE  
1. Shut off electricity at the main fuse box until installa-  
tion is complete. Verify power is off with a voltmeter.  
Type  
4
RH  
M
W
W
H
RC  
RC  
V
Y
Y
G
G
F
1
Type  
2
2. Remove the front cover of the old thermostat. With  
wires still attached, remove wall plate from the wall.  
Type  
3
3. If the old thermostat has a wall mounting plate,  
removethethermostatandthewallmountingplateas  
an assembly.  
C
Type  
4
R5  
R
4
Y6  
Y
G
G
4. FOR HEATING ONLY SYSTEMS — Disconnect the  
two wires from the old thermostat. Skip steps 5  
through7belowandproceedtoATTACHSUBBASE  
TO WALL.  
Type  
5
W
TABLE 2. WIRE IDENTIFICATION LABELS  
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).  
Type New Old New Old New Old New Old New Old  
1
RH  
4
W
W
RC RC  
Y
Y
G
G
Type New Old New Old New Old New Old New Old  
RH RH RC RC  
2
W
W
Y
Y
G
G
Type New Old New Old New Old New Old New Old  
RH RC  
3
M
W
H
V
Y
C
G
F
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  
type number you’ve identified if the old thermostat did  
not have wires attached to all the terminals).  
Type New Old New Old  
RH R5  
New Old New Old  
Y6  
4
W
4
Y
G
G
Type New Old New Old  
RH  
New Old New Old  
5
R
W
W
Y
Y
G
G
7. Label each wire as you disconnect it. The labels have  
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.  
PULL STRAIGHT OUT  
ATTACH SUBBASE TO WALL  
Figure 2. Removing thermostat from subbase  
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.  
Screw  
anchors  
Connect wires under  
terminal screws  
Activity  
light  
Mounting  
hole  
Mounting  
hole  
6
W
RC  
G
6-pin connector  
MV  
2. Pull wires through opening in the center of the sub-  
base. DO NOT LET WIRES FALL BACK INTO  
WALL.  
Y
RH  
3-pin connector  
3. Connect wires beneath terminal screws on sub-  
base using appropriate wiring schematic (see figs.  
3 through 11).  
Pull wires through  
this opening  
(Installation instructions continue on page 5.)  
Figure 3. Subbase  
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CAUTION  
NOTE  
!
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 24 VAC transformer  
THERMOSTAT  
Y
6
MV  
G
W
RC  
RH  
6
W
RC  
G
SYSTEM  
MV  
Heating  
System  
Hot  
Y
24 VAC  
120 VAC  
RH  
Neutral  
TRANSFORMER  
Thermostat Terminal Connections  
Figure 4. Typical wiring diagram for heat only, 2-wire, single transformer systems  
From 24 VAC  
transformer  
From heating system  
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
6
W
RC  
G
Y
6
MV  
G
W
RC  
RH  
MV  
NOTE  
Fan  
Heating  
System  
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.  
Relay  
Hot  
Y
24 VAC  
120 VAC  
RH  
From fan relay  
Neutral  
CONNECT red jumper  
wire (provided)  
TRANSFORMER  
Thermostat Terminal Connections  
Figure 5. Typical wiring diagram for heat only, 3-wire, single transformer systems  
From 24 VAC  
transformer  
THERMOSTAT  
Y
6
MV  
G
W
RC  
RH  
6
W
RC  
G
SYSTEM  
MV  
Cooling  
System  
Fan  
Relay  
Hot  
Y
24 VAC  
120 VAC  
From fan relay  
From cooling system  
RH  
Neutral  
TRANSFORMER  
Thermostat Terminal Connections  
Figure 6. Typical wiring diagram for cool only, 3-wire, single transformer systems  
From heating system  
CONNECT red jumper  
wire (provided)  
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
Y
6
MV  
G
W
RC  
RH  
6
W
RC  
G
W
MV  
RH  
NOTE  
Cooling  
System  
Fan  
Heating  
System  
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.  
Relay  
Hot  
Y
24 VAC  
120 VAC  
From fan relay  
Neutral  
From cooling system  
From 24 VAC  
transformer  
TRANSFORMER  
Thermostat Terminal Connections  
Figure 7. Typical wiring diagram for heat/cool, 4-wire, single transformer systems  
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From millivolt system  
THERMOSTAT  
SYSTEM  
Y
6
MV  
G
W
RC  
RH  
6
W
RC  
G
MV  
Millivolt  
System  
Y
RH  
From millivolt system  
Thermostat Terminal Connections  
Figure 8. Typical wiring diagram for millivolt systems  
From millivolt system  
From 24 VAC  
transformer  
THERMOSTAT  
Y
6
MV  
G
W
RC  
RH  
6
W
SYSTEM  
MV  
RC  
G
Millivolt  
System  
Cooling  
System  
Fan  
Hot  
Relay  
24 VAC  
120 VAC  
Y
Neutral  
RH  
TRANSFORMER  
From fan relay  
From cooling system  
Thermostat Terminal Connections  
Figure 9. Typical wiring diagram for millivolt systems + cool only, 3-wire systems  
From zone valve  
THERMOSTAT  
SYSTEM  
6
W
RC  
G
Y
6
MV  
G
W
RC  
RH  
MV  
6
1
4
2
5
Zone  
Valve  
Hot  
Y
24 VAC  
120 VAC  
RH  
From 24 VAC transformer  
(through zone valve)  
Neutral  
TRANSFORMER  
Thermostat Terminal Connections  
Figure 10. Typical wiring diagram for heat only, 3-wire, zone valve systems  
From heating  
system  
From 24 VAC  
cooling transformer  
THERMOSTAT  
Y
6
MV  
G
W
RC  
RH  
SYSTEM  
Hot  
6
W
MV  
RC  
G
24 VAC  
Cooling  
System  
Fan  
Heating  
System  
120 VAC  
Relay  
Neutral  
HEATING TRANSFORMER  
Hot  
Y
From fan relay  
RH  
From cooling  
system  
24 VAC  
120 VAC  
From 24 VAC  
heating transformer  
Neutral  
COOLING TRANSFORMER  
Thermostat Terminal Connections  
Figure 11. Typical wiring diagram for heat/cool, 5-wire, two-transformer system  
4. Place subbase over hole in wall and mark mounting  
hole locations on wall using subbase as a template.  
mounting holes, or if holes drilled are too large and do  
not allow you to tighten subbase snugly, use plastic  
screw anchors to secure subbase.  
5. Move subbase out of the way. Drill mounting holes.  
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.  
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  
5
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from the front). Gently pivot the thermostat up until the six  
pin connectors and the plastic snaps lock into place (see  
fig. 12). 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.  
ATTACH THERMOSTAT TO SUBBASE  
IT IS RECOMMENDED THAT YOU SET OPTION  
SWITCHESTODESIREDPOSITIONBEFOREATTACH-  
ING ON SUBBASE (see OPERATION). IT IS ALSO  
RECOMMENDED THAT YOU PROGRAM THE  
THERMOSTAT WITH BATTERIES INSTALLED BE-  
FORE ATTACHING ON SUBBASE (see OPERATION  
GUIDE for programming instructions).  
CAUTION  
!
SYSTEM  
SWITCH  
USE  
TO TURN THERMOSTAT OFF BE-  
FORE ATTACHING THERMOSTAT TO WALL.  
FAILURE TO TURN THERMOSTAT OFF BEFORE  
ATTACHING TO WALL MAY CAUSE EQUIPMENT  
DAMAGE DUE TO RAPID COMPRESSOR CY-  
CLING.  
To attach thermostat to subbase, line up the plastic snap  
guides at the bottom of the thermostat and the three  
connector pins on the thermostat with the connectors  
near the bottom left section of the subbase (when viewed  
ENGAGE TWO LOWER GUIDES;  
PIVOT UP  
Figure 12. Attaching thermostat to subbase  
OPERATION  
Batteries  
6-pin connector  
SYSTEM CONFIGURATION  
A. SET GROUP A OPTION SWITCHES  
NOTE  
DO NOT REMOVE THE “AA” BATTERIES WHEN  
CHANGING GROUP A OPTION SWITCHES. Any  
time Group B option switches are changed, the bat-  
teriesmustberemovedforaminimumoftwominutes.  
(Group A)  
(Group B)  
1. Total Keypad Activity  
Option switches  
3-pin connector  
ON  
Figure 13. Back of thermostat  
Switch #1 OFF  
Switch #2 OFF  
B. SET GROUP B OPTION SWITCHES  
1
2
2. Total Keypad Lockout — All thermostat buttons are  
NOTE  
disabled.  
ANY TIME GROUP B OPTION SWITCHES ARE  
CHANGED,THE“AA”BATTERIESMUSTBEREMOVED  
FOR A MINIMUM OF 2 MINUTES. DO NOT REMOVE  
THE BATTERIES WHEN CHANGING GROUP A OP-  
TION SWITCHES.  
ON  
Switch #1 ON  
Switch #2 OFF  
1
2
3. Limited Temperature Range — Temperature may  
beraisedorloweredwithinprogrammedtemperature  
limits (temperature adjustment cannot exceed the  
lowest cooling or highest heating program tempera-  
tures).  
1. AutomaticChangeover(Heating/CoolingSystems  
Only) — enables thermostat to automatically switch  
between heating and cooling programs to maintain  
desired room temperature.  
ON  
ON  
Switch #1 ON  
Switch #1 OFF  
Switch #2 ON  
Switch #2 OFF  
Switch #3 (see step B5)  
1
2
3
1
2
When thermostat is in Limited Temperature Range  
only the following buttons are disabled:  
ADV  
HOLD  
TEMP  
SET  
DAY  
PRGM  
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2. Manual Changeover (Heating/Cooling Systems  
FAN  
SWITCH  
2. Press  
until FAN ON is displayed. The blower  
Only)  
should begin to operate (this will work only on sys-  
tems with a G terminal).  
ON  
Switch #1 OFF  
Switch #2 OFF  
Switch #3 (see step B5)  
1
2
3
Onthree-wireheatonlysystems,oronfour-wireheat/  
cool systems, if the thermostat display is operating  
3. Heat Only Systems  
FAN  
SWITCH  
ON  
properly, but the fan does not operate when  
Switch #1 OFF  
Switch #2 ON  
ispressed,theredjumperwire(providedwiththermo-  
stat) may not be properly installed between the RH  
and RC terminals. Disconnect electrical power to  
system and properly install the jumper wire per the  
appropriate wiring diagram.  
Switch #3 (see step B5)  
1
2
3
4. Cool Only Systems  
ON  
Switch #1 ON  
Switch #2 ON  
Switch #3 (see step B5)  
1
2
3
FAN  
3. Press  
until FAN AUTO is displayed. The  
SWITCH  
blower should stop operating within approximately  
one minute.  
5. Computed Energy Management Recovery  
(EMR) — With EMR enabled, system will be ener-  
gized before the next program period begins, to  
achieve programmed temperature by the beginning  
of the next program period (the thermostat’s micro-  
computer calculates 15 minutes for every 2°F tem-  
perature change). For example, assume that the  
thermostat is programmed to provide an overnight  
heating temperature of 62°F, and during the next  
programperiod,programmedtobeginat6:00AM,the  
programmed temperature is 70°F. With EMR acti-  
vated, 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.  
HEATING SYSTEM  
SYSTEM  
SWITCH  
1. Press  
untilHEATisdisplayed(itmayalready  
be displayed).  
2. Press  
to adjust thermostat above room tem-  
perature to call for heat. The heating system should  
begin to operate.  
(Instructions continue on next page.)  
ON  
Switch #1 (see steps B1–B4)  
Switch #2 (see steps B1–B4)  
Switch #3 OFF  
1
2
3
C. ELECTRIC HEAT SYSTEMS  
LOCKOUT BYPASS OPTION  
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.  
13). If the thermostat is energizing electric heat sequenc-  
ers, DO NOT clip wire W14.  
FOR QUALIFIED SERVICE TECHNICIANS’ USE  
ONLY.OPERATORSSHOULDNOTUSETHISFEA-  
TURE DUE TO POSSIBILITY OF EQUIPMENT OR  
PROPERTY DAMAGE, OR PERSONAL INJURY.  
COMPRESSOR SHORT TERM  
CYCLE PROTECTION  
CHECK THERMOSTAT OPERATION  
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  
ADV  
NOTE  
When checking thermostat, Group B option switches #1  
and #2 for automatic changeover must be in the OFF  
position.Thiswillallowtemporarysettingofheatsetpoints  
above cool setpoints. After system checkout, reset Group  
Boptionswitch#1to ONpositionifautomaticchangeover  
is desired (see SET GROUP B OPTION SWITCHES).  
while testing thermostat operation, simply press  
PRGM  
HOLD  
and  
buttons at the same time at initial startup.  
TEMP  
FAN OPERATION  
DO NOT USE THE LOCKOUT BYPASS OPTION  
UNLESSTHECOMPRESSOROILHEATERSHAVE  
BEEN OPERATIONAL FOR 6 HOURS AND THE  
SYSTEM HAS NOT BEEN OPERATIONAL FOR AT  
LEAST 5 MINUTES.  
1. Turn on power to the system. If the heat source has  
a standing pilot, be sure to light it.  
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After the system has been checked and is running prop-  
erly, determine if automatic changeover is desired (see  
SYSTEM CONFIGURATION).  
COOLING SYSTEM  
CAUTION  
!
Refer to the OPERATION GUIDE if you need additional  
To prevent compressor and/or property damage,  
if power to the compressor has been off or inter-  
rupted for more than 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.  
information on thermostat operation.  
TROUBLESHOOTING  
Refer to the Question & Answer section of the OPERA-  
TION GUIDE for information on troubleshooting the ther-  
mostat.  
SYSTEM  
SWITCH  
1. Press  
2. Press  
until COOL is displayed.  
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).  
If the thermostat display is operating properly, but the  
cooling system does not operate when the above  
steps are performed, the red jumper wire (provided  
with thermostat) may not be properly installed be-  
tween the RH and RC terminals. Disconnect electri-  
cal power to system and properly install the jumper  
wire per the appropriate wiring diagram.  
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  

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