White Rodgers 1F56N 911 Thermostat User Manual

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1F56N-911  
Low Voltage Heating/Cooling Thermostat  
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  
M
SYSTE  
OFF  
FAN  
TO  
This low voltage thermostat is designed to provide conve-  
nient control of the heating/cooling system. To provide  
greater room comfort, the sensitive spiral bimetal is com-  
bined with an adjustable heating anticipator and a fixed  
cooling anticipator to provide maximum comfort.  
H
EAT  
ON  
COOL  
AU  
°C  
32  
°C  
32  
90  
90  
80  
70  
60  
80  
70  
60  
21  
10  
21  
10  
50  
50  
PRECAUTIONS  
Ifindoubtaboutwhetheryourwiringismillivolt,line,orlow This control is a precision instrument, and should be  
voltage, have it inspected by a qualified heating and air handled carefully. Rough handling or distorting compo-  
conditioning contractor, electrician, or someone familiar nents could cause the control to malfunction.  
with basic electricity and wiring.  
CAUTION  
!
Do not exceed the specification ratings.  
To prevent electrical shock and/or equipment  
damage, disconnect electric power to system at  
main fuse or circuit breaker box until installation  
is complete.  
All wiring must conform to local and national electrical  
codes and ordinances.  
CONTENTS  
Do not short out terminals on gas valve or pri-  
marycontroltotest. Shortorincorrectwiringwill  
burn out heat anticipator and could cause per-  
sonal injury and/or property damage.  
Description ........................................................ 1  
Precautions ....................................................... 1  
Specifications .................................................... 2  
Installation ......................................................... 2  
Select Thermostat Location  
WARNING  
!
Route Wires to Location  
Attach Subbase to Wall  
Donotuseoncircuitsexceeding30volts. Higher  
voltage will damage control and could cause  
shock or fire hazard.  
Special System Configurations  
Electric Heat Furnaces (Single Trans-  
former Systems Only)  
Two-Transformer Systems  
Heat Pump Applications  
Special Application Terminals  
Thermostat installation and all components of  
the system shall conform to Class II circuits per  
the NEC code.  
Attach Thermostat to Subbase  
Operation & Maintenance ................................. 5  
Adjusting Heat Anticipator  
Calibrating Thermostat  
PART NO. 37-6923A  
White-Rodgers is a division  
of Emerson Electric Co.  
0807  
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SPECIFICATIONS  
ELECTRICAL DATA  
APPLICATIONS  
Switch Rating: 24 VAC (30 VAC max.)  
Heating - 0.15 to 1.2 Amps  
Cooling - 0 to 1.5 Amps  
Switch Action: SPST - Snap Action  
Anticipator Rating:  
The 1F56N is designed for use with  
• Standard heating and cooling systems  
• Electric heating and cooling systems  
• Single stage heat pump systems  
• Two-transformer systems  
• Electronic air cleaners  
Heating - Adjustable from 0.15 to 1.2 Amps  
Cooling - Fixed 24 VAC  
• Humidifiers  
• Zone dampers  
THERMAL DATA  
Temperature Range: 50°F to 90°F (10°C to 32°C)  
Differential: 1°F  
This thermostat CANNOT BE USED with:  
• Millivolt systems  
• Multi-stage applications  
INSTALLATION  
ATTENTION: This product does not contain mercury.  
However, t his product may replace a unit which contains  
mercury.  
ROUTE WIRES TO LOCATION  
NOTE  
Donotopenmercurycells. Ifacellbecomesdamaged, do  
not touch any spilled mercury. Wearing non-absorbent  
gloves, take up the spilled mercury and place into a  
container which can be sealed. If a cell becomes dam-  
aged, the unit should be discarded.  
All wiring must conform with local and national electrical  
codes and ordinances.  
1. If an old thermostat being replaced is in a satisfactory  
location, and the wiring appears to be in good condi-  
tion, use existing wiring. If in doubt, re-wire.  
Mercury must not be discarded in household trash. When  
the unit this product is replacing is to be discarded, place  
in a suitable container and return to White-Rodgers at  
2895 Harrison Street, Batesville, AR 72501-2117 for  
proper disposal.  
2. If a new location is chosen or if this is a new installa-  
tion, thermostat wiring must first be run to the location  
selected.  
3. 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  
SELECT THERMOSTAT LOCATION  
next to guide hole. In houses without basements, drill  
1
Proper location insures that the thermostat will provide a  
comfortable home temperature. Observe the following  
general rules when selecting a location:  
¦2” hole through ceiling and into partition from above  
(see fig. 1).  
4. Through this hole drop a light chain, or 6” chain  
attachedtoastrongcord.Snagcordinbasementwith  
hookedwire.Inhouseswithoutbasements,dropcord  
through hole in ceiling and down partitioning; snag  
cord at the thermostat 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.  
5. Attach thermostat wires to cord and pull thermostat  
wires through hole in wall so that 6” of wire protrudes.  
1
⁄ ” hole for  
2
4. Avoid locations close to windows, adjoining outside  
walls, or doors that lead outside.  
thermostat wire  
5. Avoid locations close to air registers or in the direct  
path of air from them.  
Stout cord with 6”  
chain attached  
Approximately  
5 feet from floor  
6. Make sure there are no pipes or duct work in that part  
of the wall chosen for the thermostat location.  
Baseboard  
strip moulding  
1
⁄ ” guide hole  
4
for sighting  
7. Never locate thermostat in a room that is warmer or  
cooler than the rest of the home, such as the kitchen.  
Quarter round  
removed  
8. Avoid locations with poor air circulation, such as  
behind doors or in alcoves.  
9. The living or dining room is normally a good location,  
provided there is no cooking range or refrigerator on  
opposite side of wall.  
3
⁄ ” hole in floor of partition  
4
Hooked wire for snagging chain  
Figure 1. Routing thermostat wires  
2
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Heat Pump Applications  
ATTACH SUBBASE TO WALL  
This subbase WILL NOT provide multi-stage heating or  
cooling operation. For single-stage heat pump applica-  
tions, install a short jumper wire across terminals W and  
Y. If the old thermostat has a terminal that is continuously  
energized, disconnect the wire from the old thermostat's  
terminal and connect it either to the: 1) B terminal, if the  
reversing valve is energized on a call for heat; or to the 2)  
O terminal, if the reversing valve is energized on a call for  
cool. If the system heats on a call for cool, or vice versa,  
this wire has been connected to the wrong terminal.  
CAUTION  
!
To prevent electrical shock and/or equipment  
damage, disconnect electric power to system at  
main fuse or circuit breaker box until installation  
is complete.  
1. Disconnect electrical power at main fuse or circuit  
breaker.  
2. Pull wires through opening near center of subbase  
and connect wires beneath terminal screws (see figs.  
2through6fortypicalwiringforeachapplication.Also  
refertosubsectionsbelowforspecialsystemconfigu-  
rations).  
NOTE  
RH and RC must be jumpered for single transformer heat  
pump systems.  
3. Push excess wiring into wall and plug hole with fire-  
resistant material (such as fiberglass insulation) to  
prevent drafts from affecting thermostat operation.  
Special Application Terminals  
The B and O terminals can provide switching for special  
functions other than heat pump operation. When the  
system switch is in the HEAT position, the B terminal is  
energized. When the system switch is in the COOL  
position, the O terminal is energized.  
4. Positionsubbaseoverholeinwallandmarkmounting  
hole locations on wall.  
5. Drill mounting holes.  
6. Fasten subbase loosely to wall, as shown, using two  
mounting screws. Place a level against bottom of  
subbase, adjust until level, and then tighten mounting  
screws to secure subbase. If holes in wall are too  
large and do not allow you to tighten subbase snugly,  
use plastic expansion plugs to secure subbase.  
ATTACH THERMOSTAT TO SUBBASE  
1. Remove cover from thermostat base by gripping the  
base in one hand. Use the other hand to pull gently at  
the top or bottom of the cover.  
SPECIAL SYSTEM CONFIGURATIONS  
2. Carefully remove the shipping protective packing  
from the switch.  
Electric Heat Furnaces (Single Transformer Systems  
Only)  
3. Attachthermostatbasetosubbase,beingsurethatall  
captivescrewsaretightenedsnugly, sincetheyserve  
as electrical connections between thermostat and  
subbase (see fig. 7).  
The subbase as shipped may not operate the fan cor-  
rectly. If both the heating and cooling system must oper-  
ate the fan relay, remove the yellow factory-installed  
jumper wire from the Y terminal and connect it to the A  
terminal. The fan should now cycle when the thermostat  
calls for either heat or cool.  
4. Snap cover on thermostat and set switches and  
temperature lever to desired set point (see OPERA-  
TION section).  
5. Turn on power to the system.  
Two-Transformer Systems  
FAN  
SYSTEM  
AUTO  
ON  
COOL OFF HEAT  
CAUTION  
!
If two transformers are used, they MUST be in  
phase. Failure to do so may result in personal  
injury and/or property damage.  
G
RC  
B
O
NOTE  
Wire color DOES NOT indicate polarity. Polarity is ob-  
W
tained from an oscilloscope or voltmeter.  
RH  
A
Y
Mounting screw  
Mounting screw  
KEEP THIS AREA  
CLEAR OF WIRES  
Hole  
in wall  
Figure 2. Thermostat subbase  
3
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CAUTION  
NOTE  
!
Take care when securing and routing wires so  
they do not short to adjacent terminals or rear of  
thermostat.Personalinjuryand/orpropertydam-  
age may occur.  
These typical wiring diagrams show only the terminal  
identification and wiring hookup. Always refer to wiring  
instructions, provided by equipment manufacturer, for  
system hookup operation.  
Fixed Cooling  
Anticipator  
Adjustable Heating  
Anticipator  
THERMOSTAT  
Captive  
Screws  
Fan  
Switch  
System  
Switch  
COOL  
HEAT  
OFF  
ON  
AUTO  
COOL  
SUBBASE  
H E A T  
System  
Switch  
W
A*  
B
RH  
Y
G
RC  
O
SYSTEM  
Moveable  
Yellow Jumper  
*
Terminal "A" is not for field wiring. See  
Factory-installed Jumper  
SPECIAL SYSTEM CONFIGURATIONS  
section for proper use of terminal "A".  
Figure 3. Typical wiring diagram (see figs. 4, 5, and 6 for typical system/thermostat wiring)  
KEEP THIS  
AREA CLEAR  
OF WIRES!  
G
RC  
B
Factory-installed  
Red Jumper Wire  
O
THERMOSTAT  
WIRING  
W
Factory-installed  
Yellow Jumper Wire  
RH  
A
Y
Factory-Installed Jumper  
RH  
W
B
O
Y
G
RC  
A
Heat  
Relay  
Compressor  
Relay  
Fan  
Relay  
Hot  
* *  
*
SYSTEM  
24 VAC  
120 VAC  
Neutral  
Terminal energized  
in cooling  
Terminal energized  
* *  
in heating  
*
TRANSFORMER  
Figure 4. Typical wiring for single transformer heating/cooling system  
KEEP THIS  
AREA CLEAR  
OF WIRES!  
G
RC  
B
Factory-installed  
Yellow Jumper Wire  
O
THERMOSTAT  
WIRING  
W
NOTE: Remove factory-  
installed jumper between  
RC and RH terminals for  
this application.  
RH  
A
Y
RH  
W
B
A
O
Y
G
RC  
TRANSFORMER  
Hot  
TRANSFORMER  
Hot  
Heat  
Relay  
Compressor  
Relay  
Fan  
Relay  
* *  
*
24 VAC  
24 VAC  
120 VAC  
Neutral  
120 VAC  
SYSTEM  
Neutral  
Terminal energized  
in cooling  
Terminal energized  
* *  
in heating  
*
Figure 5. Typical wiring for two-transformer heating/cooling system  
4
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KEEP THIS  
AREA CLEAR  
OF WIRES!  
G
RC  
Factory-installed  
Red Jumper Wire  
B
O
THERMOSTAT  
WIRING  
W
Factory-installed  
Yellow Jumper Wire  
Field-installed  
Jumper Wire  
RH  
A
Y
Factory-Installed Jumper  
Field-Installed Jumper  
RC  
G
RH  
O
W
Y
B
A
TRANSFORMER  
Hot  
Fan  
Relay  
Compressor  
Relay  
*
* *  
24 VAC  
120 VAC  
Neutral  
SYSTEM  
Terminal energized  
in cooling  
Terminal energized  
in heating  
*
* *  
Figure 6. Typical wiring for single transformer, single stage heat pump system  
F
A
A
N
U
T
O
O
N
S
Y
C
S
O
T
O
E
L
M
O
F
F
H
E
A
T
90  
80  
70  
60  
50  
90  
80  
70  
Subbase  
60  
50  
Thermostat  
Cover  
Figure 7. Attach thermostat to subbase  
OPERATION &  
MAINTENANCE  
This thermostat is easy to operate. Fig. 8  
shows how the heating/cooling system  
and fan operate when the switches are in  
various positions. Use the system switch  
to select either heating or cooling, or to  
turn the heating/cooling system off. Use  
the fan switch to control fan operation.  
When the fan switch is in the AUTO  
position,thefanwillcyclewiththeheating  
or cooling system (the fan will not run if  
the system switch is in the OFF position  
and the fan switch is in the AUTO posi-  
tion). When the fan switch is in the ON  
position, the fan will run continuously,  
regardlessofsystemswitchposition(even  
if the system switch is set to OFF, the fan  
will run if the fan switch is in the ON  
position).  
Shows switch position  
FAN  
SYSTEM  
OPERATION  
AUTO ON  
COOL OFF HEAT  
No heating; no cooling; no fan  
No heating; no cooling; fan runs continuously  
Cooling system cycles from thermostat; fan runs  
continuously  
Cooling system and fan cycle from thermostat  
Heating system cycles from thermostat; fan cycles  
from fan control on furnace  
Heating system cycles from thermostat; fan runs  
continuously  
Figure 8. Subbase switching and thermostat/system operation  
5
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1. The anticipator’s heat may adversely affect thermo-  
stat recalibration. To prevent this, disconnect electri-  
cal power to the thermostat at the furnace, main fuse,  
or breaker box.  
ADJUSTING HEAT ANTICIPATOR  
CAUTION  
!
The adjustable heat anticipator WILL BURN OUT  
if 25 VAC is applied directly to the thermostat by  
shorting out the primary control during testing.  
This may cause personal injury and/or property  
damage.  
2. Movetemperatureadjustmentlevertoasettingabout  
5° above room temperature.  
3. Remove thermostat cover. Slip 7¦32” wrench onto hex  
nut beneath bimetal (see fig. 10). While holding  
temperature adjustment lever stationary, turn hex  
nut clockwise until movable contact moves off of  
magnet.  
This thermostat is equipped with an adjustable heat  
anticipator and was preset at the factory to provide  
satisfactoryoperationoftheheatingsystemundernormal  
conditions. If additional adjustments are necessary, they  
may be made as follows (see fig. 9):  
4. Move temperature adjustment lever to lowest setting.  
5. Replace thermostat cover. Wait 10 minutes for bi-  
metal temperature to stabilize. Do not stand near the  
thermostat during this period, as your breath and  
body heat will affect bimetal temperature.  
1. Remove thermostat cover.  
2. If heat cycle is too long, set heat anticipator to a  
slightly lower dial setting (1¦  
division).  
2
6. Move temperature adjustment lever to correspond to  
actual room temperature. Then remove thermostat  
cover.  
3. If heat cycle is too short, set heat anticipator to a  
slightly higher dial setting (1¦  
4. Replace thermostat cover.  
2
division).  
7
7. Slip ¦32” wrench onto hex nut (see fig. 10). While  
holdingtemperatureadjustmentleverstationary, turn  
hex nut counterclockwise until movable contact just  
closes against magnet.  
.25  
.3  
.4  
8. Replace thermostat cover and set temperature ad-  
justment lever to desired temperature. Turn on elec-  
trical power to system.  
.2  
.18  
.5  
.6  
.8  
.15  
1.  
Move this lever to  
adjust heat  
Arrow points to the  
matched current rating  
of the primary control  
anticipator  
Figure 9. Anticipator adjustment  
CALIBRATING THERMOSTAT  
Temperature  
adjustment  
This thermostat has been carefully adjusted at the factory  
and should not require recalibration.  
lever  
Bimetal  
Duetoenvironmentalconditions,duringnormaloperation  
there may be a few degrees of difference between the  
indicator setting of the thermostat and actual room tem-  
perature. If the disagreement is appreciable, however,  
first make sure that the thermostat is properly located and  
leveled. Then, if recalibration still seems necessary, pro-  
ceed as follows:  
7
32”  
Calibration  
wrench  
Figure 10. Calibrating thermostat  
CAUTION  
!
To prevent electrical shock and/or equipment  
damage, disconnect electrical power to the sys-  
tem until recalibration is complete.  
6
7
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HOMEOWNER HELP LINE: 1-800-284-2925  
The Emerson logo is a  
trademark and a service mark  
of Emerson Electric Co.  

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