White Rodgers 1F85RF-275 Installation and Operation Instructions
IMPORTANT
Do not apply power to the thermostat or wireless
sensor until instructed to do so.
QUICK INSTALLATION GUIDE
Any of the above can diminish or prevent proper
RF communication for this kit. Be sure to perform
a thorough checkout and confirm signal strength
between thermostat and wireless sensor.
Read Installer Notes
before removing cover
from Thermostat.
For proper operation of the RF wireless
communication, when installing:
z Avoid locating thermostat or sensor near any
wireless or noise generating devices, particularly
radio devices that operate in the range of 418 to
428 MHz.
z Be sure that there are no electrical wires, metal
pipes or ductwork in the part of the wall chosen for
thermostat or sensor location
1F85RF-275
Wireless Remote Kit
INSTALLER NOTES
System Power
Thermostat is received from the factory for system
power to be hardwired with a common wire connected to
terminal C. If no common wire is available, the thermostat will use Power Stealing and must be configured.
See Thermostat 24VAC Requirement on page 5.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
z Avoid locating the thermostat or sensor on a
concrete wall, metal junction box or metal plate.
z Thermostat antenna wire must be installed into the
wall. Do not allow the antenna wire to be between
the thermostat and the wall.
z Thermostat must have uninterrupted 24VAC for
proper communication.
FAILURE TO READ AND FOLLOW ALL
!
CONTROL COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS
Index Page
Wireless Remote Kit Installation 2
Applications 4
Specifications 4
Installation 5
Wiring Connections 6
Thermostat/Sensor Quick Reference 8
Installer Configuration Menu 10
Operating Your Thermostat and Sensor 14
Programming 17
Troubleshooting 18
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www.emersonclimate.com
PART NO. 37-6841E
Replaces 37-6841C and D
1039
1
Antenna Wire – When installing the thermostat,
antenna wire must be installed into the wall for
proper communication between the thermostat
and the remote sensor.
QUICK INSTALLATION GUIDE
WIRELESS REMOTE KIT INSTALLATION
Power Stealing – If the HVAC system does not
provide enough power, we recommend connecting
a 150 Ohm, 10 Watt resistor between terminals W
and C of the furnace or Y and C on the air
conditioner or both to increase the power provided.
System power must be turned off before
beginning installation
Mount thermostat
1
Position and mount thermostat on wall following
standard installation procedures. Questions on
installation, see Guidelines for Thermostat/Sensor
Locations and Mounting Thermostat and Sensor on
page 5.
Thermostat Antenna Wire
When system power is turned on, if the display is
blank, the thermostat is not receiving 24VAC.
Provide battery power to remote sensor
3
and check sensor transmission
Now, remove Battery Tag from remote sensor to
provide power.
The remote sensor will transmit once every 10
seconds for one hour.
Place the sensor on the thermostat for the best
transmitting-receiving conditions.
installed through wall
Connect wires to thermostat
2
Connect wires following standard wiring procedures.
Questions on wiring, see system diagrams on page 7.
24 VAC Requirement
The thermostat must have 24VAC to operate. If a
common wire is connected to terminal C, the
system is providing 24VAC to the thermostat and
the RC/PS switch (S7) should be in the RC position. (See Figure 1 on page 5) Proceed to step 3.
If the thermostat does not have a common wire
connected to terminal C, the RC/PS switch must be
in the PS position to allow Power Stealing.
2
Indicates
sensor is
transmitting
signal
Indicates
sensor is
receiving
signal
Signal
strength
WIRELESS REMOTE KIT INSTALLATION
QUICK INSTALLATION GUIDE
Confirm that thermostat is receiving
4
The thermostat receiving icon and the sensor
transmitting icon will appear at the same time. The
thermostat display will show SIGNAL and the
strength of the signal, 3 bars high signal strength, 2
bars medium signal strength, and 1 bar low signal
strength. The display will also show the temperature
sensed by the remote sensor.
During the one hour after remote sensor power-up,
the thermostat should be receiving signals consis-
tently (6 signals in one minute).
Position Remote Sensor at installation
5
location
Once communication has been confirmed, move
remote sensor to permanent location. Do not mount
remote sensor or drill holes to mount sensor yet.
Have someone hold the remote sensor at the
desired mounting location. Hold remote sensor on
the left side to avoid interference with the transmitting antenna on the right side.
Return to the thermostat and confirm that good
communication with the thermostat can be established as described in step 5. Ideal consistency is 6
signals in 1 minute.
Mount Remote Sensor
6
Once the ideal position is determined, mark mounting holes for the remote sensor. The batteries will
have to be removed from the remote sensor to
access the mounting hole under them.
After mounting the remote sensor, reinstall the
batteries. The remote transmitter will begin transmitting again. Confirm that communication with the
thermostat is still good as describe in step 5.
Complete Installation
7
Perform operation check of thermostat with heating
and cooling systems. Questions on thermostat
operation, see Check Thermostat Operation on
page 13.
Check Remote Sensor operation as described in
Remote Temperature Sensor Information on the
Thermostat Display on page 14.
In normal operation, the remote sensor will transmit
when it senses a temperature change of 3/16 of a
degree from the last transmission or after 10
minutes. The antenna icons will turn on briefly to
indicate the sensor is transmitting and the thermostat is receiving.
3
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.
APPLICATIONS
THERMOSTAT APPLICATION GUIDE
Description
Heat Pump (No Auxiliary or Emergency Heat) Yes
Heat Pump (with Auxiliary or Emergency Heat) Yes
Standard Heat & Cooling Systems Yes
Multi-Stage Systems requiring more than Yes
One Call for Heat or Cool
Standard Heat Only Systems Yes
Millivolt Heat Only Systems – Floor or Wall Furnaces No
Standard Central Air Conditioning Yes
Gas or Oil Heat Yes
Electric Furnace Yes
Hydronic (Hot Water) Zone Heat – 2 Wires * Yes
Hydronic (Hot Water) Zone Heat – 3 Wires No
* Common Connection Required
1F85RF-275 Thermostat and
Wireless Remote Sensor Kit
Automatic Heat/Cool Changeover Thermostat for Single Stage/
Multi-Stage/Heat Pump Systems with Wireless Remote Sensor
Installation and Operating Instructions for Model:
Model Programming Choices
1F85RF-270 5/1/1 Day Non-Programmable
F145RF-1328 Wireless Remote Sensor
1F85RF-270
Thermostat
F145RF-1328 Wireless
Remote Sensor
SPECIFICATIONS
Thermostat:
Electrical Ratings .......................... 20 to 30 VAC 50/60 Hz
0.2 to 0.6 Amps per Load
(Y1, E/W1, G)
1.5 Amps (Y2, W2, O, B
Load per terminal)
1.5 Amps Max
Setpoint Range.............................. 45 to 90°F (7 to 32°C)
Rated Differential (Single Stage) ... Heat 0.6° or 1.5°F, Cool 1.2°F
Rated Differential (Multi-Stage) ..... Heat 0.6° or 1.5°F, Cool 1.2°F
Rated Differential (Heat Pump)..... Heat & Cool 0.75° or 1.2°F
Operating Ambient ........................ 32 to +105°F (0 to +41°C)
Operating Humidity ....................... 90% non-condensing max.
Shipping Temp. Range.................. -4 to +150°F (-20 to +65°C)
Thermostat Dimensions ............... 3-3/4"H x 6"W x 1-1/4"D
WARNING
!
Thermostat installation and all components of the
control system shall conform to Class II circuits per the
NEC code.
(All terminals combined)
Remote Sensor:
This device complies with Part 15 of the FCC Rules, Operation is
subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
Maximum Wireless Remote Sensors .... 1 indoor, 1 outdoor
Operating Range .................................... 45 to 90°F (7 to 32°C)
Operating Humidity Range .....................0 to 90% RH
(non-condensing)
Dimensions .............................................2-5/8"H x 4-1/4"W x 7/8"D
* Max. Distance from Thermostat .......... 200 feet
* Distance shown is for a typical application. Distances may vary in
some applications because obstacles that block the signal path
may affect the strength of the signal.
ATTENTION: MERCURY NOTICE
This product does not contain mercury. However, this product may replace a product which contains mercury.
Mercury and products containing mercury must not be discarded in household trash. Do not touch any spilled mercury.
Wearing non-absorbent gloves, clean up any spilled mercury
and place in a sealed container. For proper disposal of a
product containing mercury or a sealed container of spilled
mercury, place it in a suitable shipping container. Refer to
www.white-rodgers.com for location to send product containing mercury.
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PART NO. 37-6841E
Replaces 37-6841C and D
1039
ANTENNA
MOUNTING HOLE
MOUNTING HOLE
INSTALLATION
CAUTION
!
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until power is required.
MOUNTING
HOLE
ELEC/GAS SWITCH
RC/PS
SWITCH
ANTENNA
WIRE
MOUNTING
HOLE
Remove Old Thermostat
Before disconnecting wires from the old thermostat, mark
wires for terminal identification so the proper wiring connections will be made to the new thermostat.
Guidelines for Thermostat/Sensor Locations
Locate the thermostat/sensor about 5 ft. above floor level on
an interior wall in an area that represents the average room
temperature.
Do not mount directly on or near HVAC equipment or other
sources of electrical noise.
Avoid locations close to windows or near adjoining outside
walls, doors leading outside, areas close to air registers or
their direct air flow or areas with poor circulation like alcoves.
Avoid locating the sensor on a concrete wall, junction box or
metal plate. Make sure there are no electrical wires, metal,
pipes or duct work in the part of the wall chosen for the
sensor location.
For proper RF wireless communication, the antenna wire
MUST be installed into the wall. If the antenna wire is
hanging between the wall and the thermostat the RF
communication may not be reliable
Antenna wire must be installed into the wall, it can not be
between the thermostat and wall.
Thermostat and indoor sensor are not approved for
installation in unconditioned space.
Thermostat 24 VAC Requirement
The thermostat must have 24 VAC supplied for the receiver
to operate. When the system wiring is connected, if a system
common wire is connected to terminal C, the system is
providing 24 VAC to the thermostat. The RC/PS switch (see
Fig 1) must be in the RC position.
If the thermostat does not have a common wire connected to
terminal C, the thermostat can use Power Stealing to get the
required 24 VAC. The RC/PS switch must be in the PS
position.
RC/PS Switch (Thermostat Power Option)
RC/PS
Switch
Position Description
RC For Hardwire Applications. Requires Common Wire
from System Transformer to "C" Terminal on Thermostat
PS For Power Stealing Applications. Use When Common
from the System Transformer is not Available for
Connection to the "C" Terminal on the Thermostat
NOTE: If set to PS (Power Stealing), the thermostat "C" terminal
must not have a wire connected.
Figure 1 – Thermostat base
ANTENNA
WIRE
REMOTE
COMMUNICATION
RECEIVER
Figure 2 – Back of thermostat base
Figure 3 – Remote sensor base
When the system is not providing enough power for the
thermostat, the display will be bright when the system is not
running and dim when the system is running. If the system is
not providing enough power, we recommend connecting a
150 Ohm, 10 Watt resistor between terminals W and C of the
furnace or Y and C of the air conditioner, or both, to increase
the power provided.
Mounting Thermostat and Sensor
Do not remove battery tag to power the sensor with batteries
until instructed to do so. The thermostat requires 24 volt system
power to operate correctly. If the thermostat goes blank, system
power is not reliable and will be corrected in the System Power
section below.
1. Remove the packing material from the thermostat and
sensor.
2. Pull the front cover of the thermostat straight off the base.
Forcing or prying will cause damage to the control.
3. Using the thermostat base as a template, place on the
selected wall locations and mark the location of all
mounting holes (Figure 1), and the hole for the thermostat
antenna wire illustrated in Figure 2.
4. Move base out of the way and drill the holes. If mounting
holes drilled are too large and do not allow you to tighten
base snugly, use the plastic screw anchors (provided) for
secure mounting.
5. Make sure the remote communication receiver is
plugged in properly to the thermostat and that the
antenna wire is routed through the thermostat subbase
as shown in Figure 2.
6. Insert antenna wire into the wall and position base into
mounting position.
7. Fasten base loosely to wall, using two mounting screws.
Place a level against bottom of base (leveling is for
appearance only and will not affect sensor operation)
and then tighten screws.
8. In the thermostat location, push excess wire into wall and
plug hole with a fire resistant material (such as fiberglass
insulation) to prevent drafts from affecting the thermostat
operation.
5
INSTALLATION
9. Connect wires to thermostat terminals as required. Refer
to wiring diagrams Fig. 4 thru 7 for proper wiring.
10. Apply system power and confirm that thermostat display
is on and SYSTEM mode is OFF. Press SYSTEM button
to OFF if necessary.
11. Enter the configuration as described in Thermostat
Configuration Menu on page 10. Configure the thermostat for system operation. While in the configuration
menu, enable the indoor remote wireless sensor (item 4)
by changing OFF to ON.
Confirming Communication of Remote
Sensor to Thermostat
Before finding a good location to mount the remote sensor,
confirm that the thermostat is receiving the remote sensor
signals consistently and at the best strength possible.
Reliable Communication: While the sensor is in the Learn
Mode, to be sure the thermostat and sensor have good communication. The thermostat receiving icon and the sensor transmitting icon will appear and turn off at about the same time. The
thermostat will display SIGNAL and the strength of the signal.
3 bars indicates a strong signal and the most desirable, 2 bars
indicates a medium strength signal and 1 bar indicates a weak
signal which is acceptable if it can not be improved. The
thermostat display will also show the temperature sensed by the
remote. The thermostat should receive 6 signals in 1 minute and
the signal strength should be 3 bars if possible.
1. Remove the battery tag from only the remote sensor. The
battery tag must still be in the thermostat. The remote sensor
will begin transmitting a signal once every 10 seconds for
one hour.
2. Place the remote sensor on the thermostat and check that
the thermostat is receiving signals from the sensor. Confirm
that the sensor and thermostat have reliable communication
as described above in Reliable Communication.
3. Move the remote sensor to the room where it is to be
installed. Do not mark a mounting location or drill holes yet.
4. Have someone hold the remote sensor at the location
selected for the remote sensor. Hold the remote sensor on
the left side to avoid interference with the transmitting
antenna on the right side of the sensor.
6. Return to the sensor and confirm that reliable communication with the sensor can be established again as described
in Reliable Communication. Have the sensor moved, if
necessary to improve the signal strength if it is not a consistent signal with signal strength of 3 bars.
7. Once the ideal position for the sensor is determined, mark
mounting holes using the sensor base as a template (Figure
3). The batteries will have to be removed to access a
mounting under them.
8. After the sensor is firmly attached to the wall and the batteries
are reinstalled, the remote sensor will begin transmitting
again for one hour. Return to the thermostat and once again
confirm that communication is still good as described in
Reliable Communication.
Battery Location
The sensor requires 2 "AAA" alkaline batteries. Batteries are
included at the factory with a battery tag to prevent power
drainage. The battery tag must be removed to engage the
batteries. For best results, replace batteries once a year with
new premium brand alkaline batteries such as Duracell
Energizer®.
®
or
Electric/Gas Switch (Fan Option)
The ELEC/GAS switch on the thermostat (Fig. 1) is factory
set to the ELEC position. In this position, the thermostat will
power the circulator fan on a call for heat. Electric heat
systems may require the switch to be in the ELEC position.
If your system does not require that the thermostat power the
circulator fan, this switch should be set to the GAS position.
Typically, gas and oil heating systems do not require the
thermostat to power the circulator fan during a call for heat. If
your heat is gas or oil, the switch should be set to the GAS
position.
When the thermostat is configured for Heat Pump, the
thermostat will always power the circulator fan on a call for
heat in the HEAT mode. The ELEC/GAS switch must be set
to match the type of Auxiliary heat your system uses for
proper operation in the EMERgency mode.
WIRING CONNECTIONS
Typical wiring diagrams are provided below for the following systems:
Single Stage Heat/Cool systems
Multi-Stage Heat/Cool systems (No Heat Pump)
Heat Pump system, one compressor or one speed compressor with Aux. Heat
Heat Pump systems, two compressors or two speed compressor with Aux. Heat
Refer to the equipment manufacturers instructions for specific wiring information. After completing the connections configure
the thermostat in the Installer Configuration Menu to match your system type.
6
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