White Rodgers 1F56N-911 User Manual
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.
This low voltage thermostat is designed to provide convenient control of the heating/cooling system. To provide
greater room comfort, the sensitive spiral bimetal is combined with an adjustable heating anticipator and a fixed
cooling anticipator to provide maximum comfort.
1F56N-911
Low Voltage Heating/Cooling Thermostat
INSTALLATION INSTRUCTIONS
DESCRIPTION
M
E
T
S
Y
S
N
FA
N
O
O
T
U
A
°C
32
90
80
70
21
60
50
10
T
A
E
H
F
F
O
L
O
O
C
°C
90
32
80
70
21
60
50
10
If in doubt about whether your wiring is millivolt, line, or low
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.
All wiring must conform to local and national electrical
codes and ordinances.
CONTENTS
Description ........................................................ 1
Precautions ....................................................... 1
Specifications .................................................... 2
Installation ......................................................... 2
Select Thermostat Location
Route Wires to Location
Attach Subbase to Wall
Special System Configurations
Electric Heat Furnaces (Single Trans-
former Systems Only)
Two-Transformer Systems
Heat Pump Applications
Special Application Terminals
Attach Thermostat to Subbase
Operation & Maintenance ................................. 5
Adjusting Heat Anticipator
Calibrating Thermostat
PRECAUTIONS
This control is a precision instrument, and should be
handled carefully. Rough handling or distorting components could cause the control to malfunction.
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.
Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will
burn out heat anticipator and could cause personal injury and/or property damage.
WARNING
!
Do not use on circuits exceeding 30 volts. Higher
voltage will damage control and could cause
shock or fire hazard.
Thermostat installation and all components of
the system shall conform to Class II circuits per
the NEC code.
White-Rodgers is a division
of Emerson Electric Co.
www.white-rodgers.com
PART NO. 37-6923A
0807
SPECIFICATIONS
ELECTRICAL DATA
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:
Heating - Adjustable from 0.15 to 1.2 Amps
Cooling - Fixed 24 VAC
THERMAL DATA
Temperature Range: 50°F to 90°F (10°C to 32°C)
Differential: 1°F
INSTALLATION
ATTENTION: This product does not contain mercury.
However, t his 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. If a cell becomes damaged, the unit should be discarded.
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.
SELECT THERMOSTAT LOCATION
Proper location insures that the thermostat will provide a
comfortable home 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 equipment.
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. Make sure there are no pipes or duct work in that part
of the wall chosen for the thermostat location.
7. Never locate thermostat in a room that is warmer or
cooler than the rest of the home, such as the kitchen.
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.
APPLICATIONS
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
• Humidifiers
• Zone dampers
This thermostat CANNOT BE USED with:
• Millivolt systems
• Multi-stage applications
ROUTE WIRES TO LOCATION
NOTE
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 condition, use existing wiring. If in doubt, re-wire.
2. If a new location is chosen or if this is a new installation, 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
next to guide hole. In houses without basements, drill
1
¦2” hole through ceiling and into partition from above
(see fig. 1).
4. Through this hole drop a light chain, or 6” chain
attached to a strong cord. Snag cord in basement with
hooked wire. In houses without basements, drop cord
through hole in ceiling and down partitioning; snag
cord at the thermostat location.
5. Attach thermostat wires to cord and pull thermostat
wires through hole in wall so that 6” of wire protrudes.
1
⁄2” hole for
thermostat wire
Stout cord with 6”
chain attached
Baseboard
strip moulding
Quarter round
removed
Figure 1. Routing thermostat wires
1
⁄4” guide hole
for sighting
Hooked wire for snagging chain
Approximately
5 feet from floor
3
⁄4” hole in floor of partition
2
ATTACH SUBBASE TO WALL
Heat Pump Applications
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.
2 through 6 for typical wiring for each application. Also
refer to subsections below for special system configurations).
3. Push excess wiring into wall and plug hole with fireresistant material (such as fiberglass insulation) to
prevent drafts from affecting thermostat operation.
4. Position subbase over hole in wall and mark mounting
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.
SPECIAL SYSTEM CONFIGURATIONS
Electric Heat Furnaces (Single Transformer Systems
Only)
The subbase as shipped may not operate the fan correctly. If both the heating and cooling system must operate 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.
This subbase WILL NOT provide multi-stage heating or
cooling operation. For single-stage heat pump applications, 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.
NOTE
RH and RC must be jumpered for single transformer heat
pump systems.
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.
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.
2. Carefully remove the shipping protective packing
from the switch.
3. Attach thermostat base to subbase, being sure that all
captive screws are tightened snugly, since they serve
as electrical connections between thermostat and
subbase (see fig. 7).
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
CAUTION
!
If two transformers are used, they MUST be in
phase. Failure to do so may result in personal
injury and/or property damage.
NOTE
Wire color DOES NOT indicate polarity. Polarity is obtained from an oscilloscope or voltmeter.
AUTO ON
O
Mounting screw KEEP THIS AREA
CLEAR OF WIRES
Figure 2. Thermostat subbase
3
FAN
COOL HEAT
GRC
ARH
SYSTEM
OFF
Y
W
Hole
in wall
B
Mounting screw
Loading...