White Rodgers 1F89-11 User manual

Printed in U.S.A.
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE. DESCRIPTION
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
WHITE-RODGERS
1F89-11
Non-Programmable Electronic Digital
Heat Pump Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
PART NO. 37-5741A
Replaces 37-5612B
9636
Operator: Save these instructions for future use!
ELECTRICAL DATA
Electrical Rating:
20 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.5 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals
combined)
THERMAL DATA
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°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
APPLICATIONS
For use with:
• Heat pump systems with up to two stages heat,
one stage cool
DO NOT USE WITH:
• Millivolt systems
• Systems exceeding 30 VAC and 1.5 amps
• 3-wire zoned hydronic heating systems
SPECIFICATIONS
Your new White-Rodgers Digital Heat Pump Thermostat
uses the technology of a solid-state microcomputer to
provide precise temperature control. This thermostat of-
fersyoutheflexibilitytosetheatingandcoolingtempera-
tures that fit your needs.
Features:
• Simultaneous heat and cool temperature storage
• LCD continuously displays set point and room tem-
perature
•°F/°C convertibility
• Temperature range 45°to 90°F
• Eightterminalsforsingleortwo-transformersystems
• O/B terminal for heat pump systems
• Armchair Demonstration Capability
CAUTION
!
To prevent electrical shock and/or equipment
damage disconnect electric power to system at
mainfuse orcircuitbreakerboxuntil installation
is complete.
Do not use on circuits exceeding specified volt-
age. Higher voltage will damage control and
could cause shock or fire hazard.
Do not short out terminals on gas valve or pri-
marycontroltotest. Shortorincorrectwiringwill
damage thermostat and could cause personal
injury and/or property damage.
WARNING
!
Thisthermostatisintendedfor use with a 24-volt system;
do not use this thermostat with a millivolt or line voltage
system. If in doubt about whether your wiring is millivolt,
line, or low voltage, have it inspected by a qualified
heating and air conditioning contractor or electrician.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical
codes and ordinances.
This control is a precision instrument, and should be
handled carefully. Rough handling or distorting compo-
nents could cause the control to malfunction.
PRECAUTIONS

2
INSTALLATION
REMOVE OLD THERMOSTAT
1. Shutoffelectricityatthemainfuseboxuntilinstallation
is complete. Ensure that electrical power is discon-
nected.
2. Remove the front cover of the old thermostat. With
wires still attached, remove wall plate from the wall.
Iftheoldthermostathasawallmountingplate,remove
the thermostat and the wall mounting plate as an
assembly.
3. Identify each wire attached to the old thermostat
usingthelabelsenclosedwiththenewthermostat.
4. Disconnectthewiresfromoldthermostatoneatatime.
DONOT LETWIRESFALLBACKINTO THEWALL.
5. Installnewthermostatusingthefollowingprocedures.
ATTACH THERMOSTAT BASE TO WALL
1. Remove the packing material from the thermostat.
2. If necessary, cut the non-electric heat jumper (see
NON-ELECTRIC HEAT SYSTEMS). Check the set-
ting of the O/B switch (see O/B TERMINAL SWITCH
SELECTION).
3. If you want to review the thermostat features before
mountingthethermostatonthe wall, see ARMCHAIR
DEMONSTRATION.
4. Gently pull the thermostat cover straight off the base.
Forcingorpryingonthethermostatwillcausedamage
to the unit.
5. Check that the system switch is in the OFF position.
Connectwiresbeneathterminalscrewsonbaseusing
appropriate wiring schematic (see figs. 3 through 5).
6. Place base over hole in wall and mark mounting hole
locations on wall using base as a template.
7. Move base out of the way. Drill mounting holes.
8. Fasten base loosely to wall, as shown in fig. 2, using
two mounting screws. Place a level against bottom of
base,adjust until level, and then tighten screws. (Lev-
elingisfor appearance onlyandwillnot affect thermo-
stat 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.
9. Push excess wire into wall and plug hole with a fire-
resistant material (such as fiberglass insulation) to
prevent drafts from affecting thermostat operation.
NON-ELECTRIC HEAT SYSTEMS
Read the following information before clipping the non-
electricheatjumper.Ifyouareunsureofyourapplication,
contact a qualified serviceperson.
Ifyouremergencyorauxiliarysystemisnon-electric(gas,
oil,etc.)andwillenergizetheblower,thenjumper,W904,
onthebackofthethermostatbasemustbecut(seefig. 1).
If your emergency or auxiliary heat system is electric and
requires that the thermostat energize the fan circuit, do
not cut jumper W904.
O/B TERMINAL SWITCH SELECTION
TheO/Bswitchonthisthermostatisfactoryset to the “O”
position.Thiswillaccommodatethemajorityofheatpump
applications, which require the changeover relay to be
energizedin COOL.Ifthethermostatyouarereplacingor
theheatpumpbeinginstalledwiththisthermostatrequire
the “B” terminal, to energize the changeover relay in
HEAT, the O/B switch must be moved to the “B” position.
ARMCHAIR DEMONSTRATION
Armchair Demonstration is a unique feature that allows
you to review your thermostat features before being
mounted on the wall.
If you wish an Armchair Demonstration of your thermo-
stat, temporarily hold a new 9-volt battery against the
wires in the battery cutout on the back of the thermostat
base for approximately 45 seconds. This will provide a
charge that will last approximately 30 to 45 minutes to
allow the thermostat to be observed.
Figure 1. Back of thermostat base
W904
CUT FOR
NON-ELECTRIC
AUX.
O
B
BATTERY CUTOUT FOR
ARMCHAIR DEMONSTRATION
Figure 2. Thermostat base
AUTO
FAN ON
COOL
OFF HEAT
EMER
Reset Button
Mounting
holes
Screw anchors
LE
Y
W2
O/B
R
G
C

3
LR
E
MALF
FAN ON
SYSTEM
MONITOR
SWITCH
FAN
AUTO
Heat
or Cool
FAN
AUTO
Emer
G W2
Figure 5. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems
Changeover
Relay*
CYO/B
Compressor
Contactor
* Changeover Relay is energized in COOL when O/B switch is in the “O” position
Changeover Relay is energized in HEAT when O/B switch is in the “B” position
Aux/Emer
Relay
(Stage 2)
Fan
Relay
Thermostat
Control
Circuit
Emergency
Relay
TWO COMMONS MUST
BE JUMPERED TOGETHER!
24 VAC 120 VAC
HOT
NEUTRAL
THERMOSTAT
SYSTEM
HOT
NEUTRAL
120 VAC
Limit or
Safety
Switches
Limit or
Safety
Switches
Limit or
Safety
Switches
24 VAC
Limit or
Safety
Switches
COMMON
COMMON
Auxiliary
Heating
Transformer
Heat Pump Transformer
24 VAC
ACCESSORY
RELAY N.O.
CONTACT
Polarity must be observed. If the HOT side of
the second transformer is jumpered to the
COMMON side of the first transformer a short
will be made. Damage to equipment will occur
when power is restored.
NOTE
The accessory relay scheme
is required when safety
circuits exist in both systems.
NOTE
EMERGENCY
LR
E
24 VAC 120 VAC
Hot
MALF
FAN ON
SYSTEM
MONITOR
SWITCH
FAN
AUTO
Heat
or Cool
FAN
AUTO
Emer
Neutral
THERMOSTAT
SYSTEM
G W2
Figure 4. Typical wiring diagram for two transformer systems with NO safety circuits
TRANSFORMER
Changeover
Relay*
CYO/B
Compressor
Contactor
* Changeover Relay is energized in COOL when O/B switch is in the “O” position
Changeover Relay is energized in HEAT when O/B switch is in the “B” position
Aux/Emer
Relay
(Stage 2)
Fan
Relay
Thermostat
Control
Circuit
Emergency
Relay Limit or
Safety
Switches
TWO COMMONS MUST
BE JUMPERED TOGETHER!
HOT
NEUTRAL
120 VAC 24 VAC
CUT AND
TAPE OFF!
If safety circuits are in
only one of the systems,
remove the transformer
of the system with NO
safety circuits.
NOTE
EMERGENCY
LR
E
24 VAC 120 VAC
Hot
MALF
FAN ON
EMERGENCY
SYSTEM
MONITOR
SWITCH
FAN
AUTO
Heat
or Cool
FAN
AUTO
Emer
Neutral
THERMOSTAT
SYSTEM
G W2
Figure 3. Typical wiring diagram for single transformer systems
TRANSFORMER
Changeover
Relay*
CYO/B
Compressor
Contactor
* Changeover Relay is energized in COOL when O/B switch is in the “O” position
Changeover Relay is energized in HEAT when O/B switch is in the “B” position
Aux/Emer
Relay
(Stage 2)
Fan
Relay
Thermostat
Control
Circuit
Emergency
Relay
NOTE
The following wiring diagrams show typical terminal
identification and wiring. For proper installation, refer to the original manufacturer's instructions.
Relay contacts shown are thermostatically operated.

4
ADJUSTABLE ANTICIPATION
The first stage has anticipation that can be set to 2.5 or
4cyclesperhourforheatingorcooling.Thesecondstage
heat has a fixed anticipation. To change the first stage
anticipationintheHEATmode,placetheSYSTEMswitch
intheOFFposition.Whileholdingthe button,movethe
SYSTEM switch to HEAT. The display will show Sfor
slow (factory setting) or Ffor fast. Release the button
when the desired anticipation setting is displayed.
CHECK THERMOSTAT OPERATION
Ifat anytimeduring testingyoursystemdoesnot operate
properly, contact a qualified serviceperson.
Fan Operation
1. Turn on power to the system.
2. Move SYSTEM switch to OFF position.
3. Move FAN switch to ON. The blower should begin to
operate.
4. MoveFANswitchtoAUTOposition.Theblowershould
stop within a short period of time.
Heating System
1. Move SYSTEM switch to HEAT position. If the auxil-
iary heating system has a standing pilot, be sure to
light it.
2. Press to adjust thermostat setting to 90°and hold
for five seconds. Both stages of the heating system
shouldbegintooperate.However,ifthewordHEATis
flashing, the compressor lockout feature is operating
(seeLockout Bypass Option totemporarilyoverride
the compressor lockout feature during testing).
3. Press to adjust temperature setting below room
temperature. The auxiliary heating system will stop
immediately,andthefirststagewillstopwithinthree
to four minutes.
Cooling System
To prevent compressor and/or property dam-
age, if the outdoor temperature is below 50°F,
DO NOT operate the cooling system.
1. Move SYSTEM switch to COOL position.
2. Press to adjust thermostat setting below room
temperature.Theblowershouldcomeonimmediately
on high speed, followed by cold air circulation. How-
ever, if the fan is running but the compressor is not
running and the word COOL is flashing, the compres-
sorlockoutfeatureisoperating(seeLockout Bypass
Optiontotemporarilyoverridethecompressorlockout
feature during testing).
3. Press to adjust temperature setting above room
temperature. The cooling system should stop oper-
ating.
CAUTION
!
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNICIANS’ USE
ONLY.OPERATORSSHOULDNOTUSETHISFEA-
TURE DUE TO POSSIBILITY OF EQUIPMENT OR
PROPERTY DAMAGE, OR PERSONAL INJURY.
COMPRESSOR SHORT TERM
CYCLE PROTECTION
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
while testing thermostat operation, move the SYS-
TEM switch to OFF position for 6 to 10 seconds then
back to the desired mode.
DO NOT USE THE LOCKOUT BYPASS OPTION
UNLESSTHECOMPRESSOROILHEATERSHAVE
BEEN OPERATIONAL FOR 6 HOURS AND THE
SYSTEMHAS NOTBEEN OPERATIONALFOR AT
LEAST 5 MINUTES.

5
Before you begin operating your thermostat, you should
be familiar with its features and with the display and the
location and operation of the thermostat buttons. Your
thermostat consists of two parts: the thermostat cover
and the base. To remove the cover, gently pull it straight
outfrom the base. To replace the cover, line upthe cover
with the base and press gently until the cover snaps onto
the base.
THE THERMOSTAT BASE
Other than the and buttons, the following are
located behind the door on the bottom of the thermostat
cover (see fig. 6). Pull the door down to open it.
The Thermostat Buttons and Switches
1
(Red arrow) Raises temperature setting.
2
(Blue arrow) Lowers temperature setting.
3
FAN switch (ON, AUTO).
4
SYSTEM switch (COOL, OFF, HEAT, EMER).
The Display
5
HEATisdisplayedwhentheSYSTEMswitchisinthe
HEAT position. COOL is displayed when the SYS-
TEM switch is in the COOL position. COOL or HEAT
is displayed (flashing) when the compressor is in
lockout mode. OFF is displayed when the SYSTEM
switch is in the OFF position.
6
Displays current room temperature.
7
EMERGENCY is displayed when the system switch
is in the EMER position.
8
Displays current set temperature.
OPERATING FEATURES
Nowthatyouare familiar withthethermostatbuttonsand
display, read the following information to learn about the
many features of the thermostat.
•TEMPERATURESETPOINT—Press or until
the display shows the temperature you want.
•°F/°C CONVERTIBILITY — Press and but-
tons until the temperature display is in Celsius (°C).
To display Fahrenheit (°F), repeat the process.
•TEMPERATURE DISPLAY ADJUSTMENT — Your
new thermostat has been accurately set in our fac-
tory. However, if you wish, you may adjust your new
thermostat temperature display to match your old
thermostat. This can be accomplished (within a ±4°
range) as follows:
OPERATION
Figure 6. Thermostat display, buttons, and switches
2
1
34
OFF
HEAT
COOL
EMERGENCY
56
87
EMER MALF AUX
WHITE-RODGERS
COOL EMER
OFF HEAT
AUTOFAN ON
1. Place the SYSTEM switch in the OFF position.
2. Whileholdingthe button,movetheSYSTEM
switchtoHEATorCOOL.Releasethe button
when the display shows only the current tem-
perature.
3. Press or toadjustthedisplayedtemperature
to your desired setting.
4. Thethermostatwillresumenormaloperationwithin
two minutes.
•RESET BUTTON - (see fig. 2) resets the thermostat
tothefactorysetting.Thisbuttoncanbeusedtoreset
the thermostat if it has been subjected to a voltage
spike and has become scrambled or frozen.
SETTING YOUR THERMOSTAT
This thermostat is easy to operate. Set the SYSTEM
switch to HEAT, COOL or EMERgency. Press or
untilthetemperaturetomaintainisshownontherightside
of the display. To turn the system off, move the SYSTEM
switch to OFF.
TheFANswitchcontrolsthefanoperation.WhentheFAN
switch is set to AUTO, the fan will cycle with the Heat
Pump. When the FAN switch is set to ON, the fan will run
continuously, regardless of SYSTEM switch position.