White Rodgers 1F85-275 User Manual
1F85-2751F85-275
1F85-275
1F85-2751F85-275
Heating & Air Conditioning
5-1-1 Programmable/Non-programmable, Auto
Changeover, Multi-Stage/Heat Pump Thermostat
INSTALLATION INSTRUCTIONSINSTALLATION INSTRUCTIONS
INSTALLATION INSTRUCTIONS
INSTALLATION INSTRUCTIONSINSTALLATION INSTRUCTIONS
OperOper
Oper
OperOper
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BE-FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BE-
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BE-
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BE-FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PER-FORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PER-
FORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PER-
FORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PER-FORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.SONAL INJURY AND/OR PROPERTY DAMAGE.
SONAL INJURY AND/OR PROPERTY DAMAGE.
SONAL INJURY AND/OR PROPERTY DAMAGE.SONAL INJURY AND/OR PROPERTY DAMAGE.
YOUR THERMOSTAT REPLACESYOUR THERMOSTAT REPLACES
YOUR THERMOSTAT REPLACES
YOUR THERMOSTAT REPLACESYOUR THERMOSTAT REPLACES
DescriptionDescription
Description
DescriptionDescription
Heat Pump (No Aux. or Emergency Heat) Yes
Heat Pump (with Aux. or Emergency Heat) Yes
Standard Heat & Cooling Systems Yes
Two Stage Heat & Two Stage Cool Yes
Standard Heat Only Systems Yes
Millivolt Heat Only Systems – Floor or Wall Furnaces Yes
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
!
To prevent electrical shock and/or equipment damage,To prevent electrical shock and/or equipment damage,
To prevent electrical shock and/or equipment damage,
To prevent electrical shock and/or equipment damage,To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse ordisconnect electric power to system at main fuse or
disconnect electric power to system at main fuse or
disconnect electric power to system at main fuse ordisconnect electric power to system at main fuse or
circuit breaker box until installation is complete.circuit breaker box until installation is complete.
circuit breaker box until installation is complete.
circuit breaker box until installation is complete.circuit breaker box until installation is complete.
aa
tortor
::
a
tor
:
aa
tortor
::
CAUTION
Sa Sa
Sa
Sa Sa
vv
e these instre these instr
v
e these instr
vv
e these instre these instr
1F85-2751F85-275
1F85-275
1F85-2751F85-275
uctions fuctions f
uctions f
uctions fuctions f
Assemble tools required as shown below.
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
REMOREMO
REMO
REMOREMO
or futuror futur
or futur
or futuror futur
FLAT BLADE SCREWDRIVER
VING OLD VING OLD
VING OLD
VING OLD VING OLD
e use!e use!
e use!
e use!e use!
PREPPREP
PREP
PREPPREP
ARAARA
TIONSTIONS
ARA
TIONS
ARAARA
TIONSTIONS
WIRE CUTTER/STRIPPER
THERMOSTTHERMOST
THERMOST
THERMOSTTHERMOST
AA
A
AA
TT
T
TT
Before removing wires from old thermostat's switching sub-
label each wirelabel each wire
base,
label each wire with the terminal designation it was
label each wirelabel each wire
removed from.
1. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
Remove Old ThermostatRemove Old Thermostat
2.
Remove Old Thermostat: A standard heat/cool
Remove Old ThermostatRemove Old Thermostat
thermostat consists of three basic parts:
a. The cover, which may be either a snap-on or
hinge type.
b. The base, which is removed by loosening all
captive screws.
c. The switching subbase, which is removed by
unscrewing the mounting screws that hold it on
the wall or adaptor plate.
3. Remove the front cover of the old thermostat.
wireswires
still attachedstill attached
wires
still attached, remove wall plate from the wall. If
wireswires
still attachedstill attached
the old thermostat has a wall mounting plate, remove the
thermostat and the wall mounting plate as an assembly.
4. Identify each wire attached to the old thermostat.
5. Disconnect the wires from the old thermostat one at a
DO NOT LET WIRES FALL BACK INTO THEDO NOT LET WIRES FALL BACK INTO THE
time.
DO NOT LET WIRES FALL BACK INTO THE
DO NOT LET WIRES FALL BACK INTO THEDO NOT LET WIRES FALL BACK INTO THE
WALLWALL
WALL.
WALLWALL
6. Install new thermostat using the following procedures.
WithWith
With
WithWith
Y2
C
R
E/W1
Y1
Mounting
Hole
Figure 1 – Thermostat baseFigure 1 – Thermostat base
Figure 1 – Thermostat base
Figure 1 – Thermostat baseFigure 1 – Thermostat base
ATTENTION!ATTENTION!
ATTENTION! This product does not contain mercury. How-
ATTENTION!ATTENTION!
ever, this product may replace a unit which contains mercury.
Do not open mercury cells. If a cell becomes damaged, do
touch any spilled mercury. Wearing non-absorbent gloves,
clean 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. Refer to www.white-rodgers.com for location to send the product containing mercury.
OBLW2G
ELEC. GAS
AUTOON
Mounting
Hole
Elec-Gas
Switch
notnot
not
notnot
White-Rodgers is a division
of Emerson Electric Co.
www.white-rodgers.com
PART NO. 37-6488CPART NO. 37-6488C
PART NO. 37-6488C
PART NO. 37-6488CPART NO. 37-6488C
Replaces 37-6488B
0838
MOUNTING AND WIRINGMOUNTING AND WIRING
MOUNTING AND WIRING
MOUNTING AND WIRINGMOUNTING AND WIRING
WARNING
!
Do not use on circuits exceeding specified voltage.Do not use on circuits exceeding specified voltage.
Do not use on circuits exceeding specified voltage.
Do not use on circuits exceeding specified voltage.Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could causeHigher voltage will damage control and could cause
Higher voltage will damage control and could cause
Higher voltage will damage control and could causeHigher voltage will damage control and could cause
shock or fire hazard.shock or fire hazard.
shock or fire hazard.
shock or fire hazard.shock or fire hazard.
Do not short out terminals on gas valve or primaryDo not short out terminals on gas valve or primary
Do not short out terminals on gas valve or primary
Do not short out terminals on gas valve or primaryDo not short out terminals on gas valve or primary
control to test. Short or incorrect wiring will damagecontrol to test. Short or incorrect wiring will damage
control to test. Short or incorrect wiring will damage
control to test. Short or incorrect wiring will damagecontrol to test. Short or incorrect wiring will damage
thermostat and could cause personal injury and/orthermostat and could cause personal injury and/or
thermostat and could cause personal injury and/or
thermostat and could cause personal injury and/orthermostat and could cause personal injury and/or
property damage.property damage.
property damage.
property damage.property damage.
Thermostat installation and all components of the
system shall conform to Class II circuits per the NEC
code.
Electric/Gas Switch (Fan Option)Electric/Gas Switch (Fan Option)
Electric/Gas Switch (Fan Option)
Electric/Gas Switch (Fan Option)Electric/Gas Switch (Fan Option)
This thermostat is configured from the factory to operate a heat/
cool, fossil fuel (gas, oil, etc.), forced air system. It is configured
correctly for any system that DOES NOT require the thermostat
to energize the fan on a call for heat. If you system is an electric
heat or heat-pump system that REQUIRES the thermostat to
turn on the fan on a call for heat, locate the ELEC/GAS switch
on the back of the thermostat (see fig. 1) and switch it to the
ELEC position. This will allow the thermostat to energize the fan
immediately on a call for heat. If you are unsure if the heating/
cooling system requires the thermostat to control the fan,
contact a qualified heating and air conditioning service person.
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.
All wiring diagrams are for typical systems only. Refer to
equipment manufacturers’ instructions for specific system wiring information.
CAUTION
!
Take care when securing and routing wires so they doTake care when securing and routing wires so they do
Take care when securing and routing wires so they do
Take care when securing and routing wires so they doTake care when securing and routing wires so they do
not short to adjacent terminals or rear of thermostat.not short to adjacent terminals or rear of thermostat.
not short to adjacent terminals or rear of thermostat.
not short to adjacent terminals or rear of thermostat.not short to adjacent terminals or rear of thermostat.
Personal injury and/or property damage may occur.Personal injury and/or property damage may occur.
Personal injury and/or property damage may occur.
Personal injury and/or property damage may occur.Personal injury and/or property damage may occur.
Attach Thermostat Base to Wall
1. Remove the packing material from the thermostat. Gently
pull the cover straight off the base. Forcing or prying on
the thermostat will cause damage to the unit.
2. Connect wires beneath terminal screws on base using
appropriate wiring schematic (see figs. 2 through 3).
3. Place base over hole in wall and mark mounting hole
locations on wall using base as a template.
4. Move base out of the way. Drill mounting holes.
5. Fasten base loosely to wall, as shown in fig. 1, using two
mounting screws. Place a level against bottom of base,
adjust until level, and then tighten screws. (Leveling is for
appearance only and will not affect thermostat operation.)
If you are using existing mounting holes, or if holes drilled
are too large and do not allow you to tighten base snugly,
use plastic screw anchors to secure subbase.
6. Push excess wire into wall and plug hole with a fireresistant material (such as fiberglass insulation) to
prevent drafts from affecting thermostat operation.
Battery Location
2 “AA” alkaline batteries are included in the thermostat at the
factory with a battery tag to prevent power drainage. You
must remove the battery tag to engage the batteries.
If “BATT” is displayed, the batteries are low and should be
replaced. For best results, replace all batteries with new
premium brand alkaline batteries such as Duracell® or
Energizer®. To replace batteries, press system button to
OFF, install the batteries along the top of the base (see Fig.
1). The batteries must be installed with the positive (+) end to
the left.
2
Heat Pump ConnectionsHeat Pump Connections
Heat Pump Connections
Heat Pump ConnectionsHeat Pump Connections
WIRING DIAWIRING DIA
WIRING DIA
WIRING DIAWIRING DIA
GRAMSGRAMS
GRAMS
GRAMSGRAMS
Refer to equipment manufacturers' instructions for specific system wiring information. The thermostat can be configured for use
with the following heat pump systems:
HEAT PUMP TYPE 1 (HP 1). Single Stage compressor system; gas or electric backup, 2-heat/1-cool stages maximum.
HEAT PUMP TYPE 2 (HP 2). Multi-Stage compressor or two compressor system with gas or electric backup, 3-heat/2-cool stages
maximum.
See figure 2 below to help you wire the thermostat properly. After wiring, see CONFIGURATION section for proper thermostat
configuration.
L
W2
Heat Mode
2nd Stage.
Emergency
Mode 2nd
Stage
Heat Mode
3rd Stage.
Emergency
Mode 2nd
Stage
G
Blower/
Circulator
Fan Energized
on Call for
Heat or Cool.
Set Elect/Gas
Switch for
Emergency
Mode
Y1
Heat and
Cool Mode
1st Stage
(Compressor)
E/W1
Emergency
Mode
1st Stage
R
24 Volt
(Hot)
C*
24 Volt
(Common)
Y2
No Output
2nd Stage
(Compressor)
NEUTRAL
24VAC
HOT
NOTE: If your system
does not provide an E
connection, jumper W2 to
E/W1 to use the Auxiliary
Heat in the Emergency
Mode.
120VAC
CLASS II
TRANSFORMER
System
Heat Pump 1
(HP1)
Heat Pump 2
(HP2)
O
Energized in
Cool Mode
B
Energized in
Heat, Off,
Emergency
Mode
Fault
Indicator
or
System
Malfunction
Switch
Figure 2 – Heat Pump Systems
*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” alkaline batteries.
Single Stage/Multi-Stage ConnectionsSingle Stage/Multi-Stage Connections
Single Stage/Multi-Stage Connections
Single Stage/Multi-Stage ConnectionsSingle Stage/Multi-Stage Connections
(No Heat Pump)(No Heat Pump)
(No Heat Pump)
(No Heat Pump)(No Heat Pump)
Refer to equipment manufacturers' instructions for specific system wiring information. The thermostat can be configured for use
with the following Single Stage and Multi-Stage systems:
SINGLE STAGE (SS 1). Gas, oil or electric, 1-heat/1-cool stage maximum.
MULTI-STAGE (MS 2). Gas, oil or electric, 2-heat/2-cool stages maximum.
See figure 3 below to help you wire the thermostat properly. After wiring, see CONFIGURATION section for proper thermostat
configuration.
L
W2
No Output
Heat Mode
2nd Stage
G
Blower/
Circulator
Fan Energized
on Call for
Cool (and
Heat) if
configured
for Electric
Heat
Y1
Cool Mode
1st Stage
E/W1
Heat
Mode
1st Stage
R
24 Volt
(Hot)
C*
24 Volt
(Common)
Y2
No Output
Cool Mode
2nd Stage
NEUTRAL
24VAC
HOT
CLASS II
TRANSFORMER
120VAC
System
Single
Stage 1
(SS1)
MultiStage 2
(MS2)
O
Energized
Constantly
in
Cool Mode
B
Energized
Constantly
in
Heat, Off,
Emergency
Mode
Fault
Indicator
(NOT
USED)
Figure 3 – Single Stage or Multi-Stage System (No Heat Pump)
*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” alkaline batteries.
3
CHECK CHECK
CHECK
CHECK CHECK
THERMOSTTHERMOST
THERMOST
THERMOSTTHERMOST
AA
T OPERAT OPERA
A
T OPERA
AA
T OPERAT OPERA
TIONTION
TION
TIONTION
NOTE
To prevent static discharge problems, touch side ofTo prevent static discharge problems, touch side of
To prevent static discharge problems, touch side of
To prevent static discharge problems, touch side ofTo prevent static discharge problems, touch side of
thermostat to release static build-up before touchingthermostat to release static build-up before touching
thermostat to release static build-up before touching
thermostat to release static build-up before touchingthermostat to release static build-up before touching
any keys.any keys.
any keys.
any keys.any keys.
If at any time during testing your system does not operate
properly, contact a qualified serviceperson.
Fan Operation
If your system does not have a G terminal connection, skip to
Heating System.
1. Turn on power to system.
2. Move FAN switch to ON position. The blower should be gin to operate.
3. Move FAN switch to AUTO position. The blower should
stop immediately.
CAUTION
!
Do not allow the compressor to run unless the com-Do not allow the compressor to run unless the com-
Do not allow the compressor to run unless the com-
Do not allow the compressor to run unless the com-Do not allow the compressor to run unless the compressor oil heaters have been operational for 6 hourspressor oil heaters have been operational for 6 hours
pressor oil heaters have been operational for 6 hours
pressor oil heaters have been operational for 6 hourspressor oil heaters have been operational for 6 hours
and the system has not been operational for at least 5and the system has not been operational for at least 5
and the system has not been operational for at least 5
and the system has not been operational for at least 5and the system has not been operational for at least 5
minutes.minutes.
minutes.
minutes.minutes.
Heating System
1. Press SYSTEM button to select the Flame icon ( ). If
the auxiliary heating system has a standing pilot, be sure
to light it.
2. Press
temperature. The heating system should begin to
operate. The display should show “STG1”. However, if
the setpoint temperature display is flashing, the compressor lockout feature is operating (see Configuration menu,
item 5).
3. Adjust temperature setting to 3° above room temperature.
If your system configuration is set at MS2, HP2 or HP1,
the auxiliary heat system should begin to operate and the
display should show “STG1+2”.
4. Press
ture. The heating system should stop operating.
to adjust thermostat setting to 1° above room
to adjust the thermostat below room tempera-
Emergency System
EMER bypasses the Heat Pump to use the heat source wired
to terminal E on the thermostat. EMER is typically used when
compressor operation is not desired, or you prefer back-up
heat only.
1. Press SYSTEM button to select EMER. “EMER” will flash
on the display.
2. Press
temperature. The Aux. heating system will begin to
operate. The display will show “STG1” flashing “EMER”
and Flame icon (
operating.
3. Adjust temperature setting to 3° above room temperature.
The auxiliary heat system should begin to operate and
the display should show “STG1+2”.
4. Press
ture. The Aux. heating system should stop operating.
To prevent compressor and/or property damage, if theTo prevent compressor and/or property damage, if the
To prevent compressor and/or property damage, if the
To prevent compressor and/or property damage, if theTo prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operateoutdoor temperature is below 50°F, DO NOT operate
outdoor temperature is below 50°F, DO NOT operate
outdoor temperature is below 50°F, DO NOT operateoutdoor temperature is below 50°F, DO NOT operate
the cooling system.the cooling system.
the cooling system.
the cooling system.the cooling system.
to adjust thermostat setting above room
) to indicate that the Aux. system is
to adjust the thermostat below room tempera-
CAUTION
!
Cooling System
1. Press SYSTEM button to select the Snowflake icon ( ).
2. Press
temperature. The blower should come on immediately on
high speed, followed by cold air circulation. The display
should show “STG1”.
3. Adjust temperature setting to 3° below room temperature.
The second stage cooling should begin to operate and
the display should show “STG1+2”.
4. Press
temperature. The cooling system should stop operating.
to adjust thermostat setting below room
to adjust the temperature setting above room
4
Loading...