Emerson 1F73 Range User Manual

CONTENTS
Preparations .................................................. 1
Thermostat Details ........................................ 1
Removing Old Thermostat ......................... 1-2
Mounting and Wiring .................................. 2-4
Check Thermostat Operation ..................... 5-6
Specifications ................................................ 6
Operation ...................................................... 6
Troubleshooting ......................................... 7-8
Installation Instructions for
Heating & Air Conditioning
1F73
Non- Programmable, Auto Changeover
Multi-stage/Heat Pump Thermostat
1
YOUR THERMOSTAT REPLACES
Description
1F73
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
Assemble tools required as shown below.
FLAT BLADE SCREWDRIVER
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
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL—
THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY
Failure to follow and read all instructions carefully
before installing or operating this control could cause
personal injury and/or property damage.
* Requires common for 24 VAC at the thermostat
2
THERMOSTAT DETAILS
3
Mounting
Hole
(O/B)Y2 E/W1
L
Y1
R
C
W2
G
ELEC GAS
Mounting
Hole
B
Elec – Gas
Switch
Figure 1. Thermostat Base
REMOVING OLD THERMOSTAT
! CAUTION
O/B Terminal
Switches Selection
O
WIRE CUTTER/STRIPPER
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
No
Standard Central Air Conditioning
PREPARATIONS
To prevent electrical shock and/or equipment damage,
disconnect electrical power to the system at the main
fuse or circuit breaker until installation is complete.
Before removing wires from old thermostat’s switching subbase,
label each wire with the terminal designation it was removed from.
1. Remove Old Thermostat: A standard heat/cool 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.
2. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
3. Remove the front cover of the old thermostat. With wires still
attached, remove wall plate from the wall. If 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 time. DO
NOT LET WIRES FALL BACK INTO THE WALL.
6. Install new thermostat using the following procedures.
White-Rodgers is a division
of Emerson Electric Co.
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PART NO. 37-6489B
Replaces 37-6489A
0621
3
REMOVING OLD THERMOSTAT
! CAUTION
CONTINUED FROM PAGE 1
ATTENTION! This product does not contain mercury. However, this 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 for proper disposal.
4
MOUNTING AND WIRING
!
WARNING
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
Do not short out terminals on gas valve or primary
control to test. Short or incorrect wiring will damage
thermostat and could cause personal injury and/or property damage.
Take care when securing and routing wires so they do
not short to adjacent terminals or rear of thermostat.
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 4).
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 fire-resistant
material (such as fiberglass insulation) to prevent drafts from
affecting thermostat operation.
Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.
Electric/Gas Switch (Fan Option)
The ELEC/GAS switch is factory set to the GAS position. In this
position, the thermostat will not power the circulator fan on a call
for heat.
If your system requires that the thermostat power the circulator
fan this switch must be set to the ELEC position. On a multi-stage
system, the thermostat will power the circulator fan on a call for
heat. On a Heat Pump system, the thermostat will power the
circulator fan on a call for second stage heat when the thermostat
is in Emergency mode.
O/B Terminal Switch Selection
The O/B switch on this thermostat is factory set to “O” position.
This will accommodate the majority of heat pump applications,
which require the changeover relay to be energized in COOL. If
the thermostat you are replacing or the heat pump being installed
with this thermostat requires a “B” terminal, to energize the
changeover relay in HEAT, the O/B switch must be moved to the
“B” position.
For multi-stage, the switch must be in “O” position for “Y2” to
operate properly.
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4
MOUNTING AND WIRING
CONTINUED FROM PAGE 2
E/W1
O/B/Y2
Y1
G
THERMOSTAT
W2
Fan
Relay
Compressor
Contactor
Emergency
Relay
Aux
Relay
(Stage 2)
R
SYSTEM
SYSTEM
MONITOR
SWITCH
See Note **
Changeover
Relay*
L
C
Hot
24 VAC
120 VAC
Neutral
* 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
TRANSFORMER
(Class II Current Limited)
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
Figure 2. Typical wiring diagram for single transformer heat pump systems
NOTE
If safety circuits are in only one of the systems, remove
the transformer of the system with NO safety circuits.
E/W1
O/B/Y2
Y1
G
CUT AND
TAPE OFF!
Changeover
Relay*
HOT
24 VAC
120 VAC
NEUTRAL
THERMOSTAT
W2
L
C
See Note **
Fan
Relay
SYSTEM
MONITOR
SWITCH
Emergency
Relay
R
SYSTEM
Limit or
Safety
Switches
Aux
Relay
(Stage 2)
Compressor
Contactor
Hot
24 VAC
120 VAC
Neutral
TWO COMMONS MUST
BE JUMPERED TOGETHER!
* 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
TRANSFORMER
(Class II Current Limited)
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
Figure 3. Typical wiring diagram for two transformer heat pump systems with NO safety circuits
NOTE
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.
O/B/Y2
E/W1
Y1
G
THERMOSTAT
W2
L
C
R
SYSTEM
Limit or
Safety
Switches
See Note **
Changeover
Relay*
Compressor
Contactor
Fan
Relay
Emergency
Relay
SYSTEM
MONITOR
SWITCH
24 VAC
120 VAC
NEUTRAL
24 VAC
ACCESSORY
RELAY N.O.
CONTACT
Aux
Relay
(Stage 2)
Auxiliary
NOTE
Heating
Transformer The accessory relay scheme
(Class II
is required when safety
Current Limited)
circuits exist in both systems.
COMMON
Limit or
Safety
Switches
TWO COMMONS MUST
BE JUMPERED TOGETHER!
* 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
Limit or
Safety
HOT
Switches
COMMON
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
Limit or
Safety
Switches
24 VAC
HOT
120 VAC
NEUTRAL
Heat Pump Transformer
(Class II Current Limited)
Figure 4. Typical wiring diagram for two transformer heat pump systems with safety circuits in BOTH systems
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4
MOUNTING AND WIRING
CONTINUED FROM PAGE 3
O/B/Y2*
E/W1
Y1
THERMOSTAT
C*
W2
G
R
SYSTEM
Heat
Compressor
Contactor
Relay
Stage 1
Stage 2
Hot
24 VAC
Compressor
Contactor
Stage 1
Heat
Relay
Stage 2
Fan
Relay
120 VAC
Neutral
TRANSFORMER
(Class II, Current Limited)
*O/B Switch must be in “O” position
Figure 5. Typical wiring diagram for single transformer multi-stage systems
Multi-stage Terminal Outputs
Refer to equipment manufacturers’ instructions for specific system wiring information.
You can configure the thermostat for use with either multi-stage
electric heat systems or multi-stage gas systems. When configured for electric heat, the G terminal (blower/fan) will be energized on a call for heat.
This thermostat is designed to operate a single-transformer
system. If you have a two-transformer system, cut and tape of one
transformer. If transformer safety circuits are in only one of the
systems, remove the transformer of the system with NO safety
circuits. If required, replace remaining transformer with a 75VA
Class II transformer. After disconnecting one transformer, the two
commons must be jumpered together.
Use the terminal output information below to help you wire the
thermostat properly for your multi-stage system. After wiring, see
CONFIGURATION section for proper thermostat configuration.
THERMOSTAT TERMINALS
SYSTEM
Multi-Stage
L
C
R
Malfunction
24 Volt
24 Volt
Light
(Common) (Hot)
W2
E/W1
(O/B)Y2*
Y1
G
Heat mode
2nd stage
Heat mode
1st stage
Cool Mode
2nd stage
Cool mode
1st stage
Blower/Fan Energized
on call for Cool (and
Heat if configured
to Electric Heat)
*O/B switch must be in “O” position
Heat Pump Terminal Outputs
Refer to equipment manufacturers’ instructions for specific system wiring informtion.
You can configure the thermostat for use with the following heat
pump system types:
HEAT PUMP TYPE 1. Single-stage compressor system; gas or
electric backup.
This thermostat is designed to operate a single-transformer
system. If you have a two-transformer system, cut and tape of one
transformer. If transformer safety circuits are in only one of the
systems, remove the transformer of the system with NO safety
circuits. If required, replace remaining transformer with a 75VA
Class II transformer. After disconnecting one transformer, the two
commons must be jumpered together.
Use the terminal output information below to help you wire the
thermostat properly for your multi-stage system. After wiring, see
CONFIGURATION section for proper thermostat configuration.
THERMOSTAT TERMINALS
SYSTEM
L
C
R
W2
E/W1
(O/B)Y2
Y1
G
Single-stage compressor system; gas or electric backup
Heat Pump 1
Malfunction
24 Volt
24 Volt
Light
(Common) (Hot)
Heat mode
2nd stage
(Aux.)
Emergency B: Energized in Heat, Off,
Mode
Emergency Mode
Heat
O: Energized in Cool Mode
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Heat and
Blower/Fan Energized
Cool mode
on call for Heat
1st stage
and Cool
(compressor)
5
Cooling System
CHECK THERMOSTAT OPERATION
NOTE
To prevent static discharge problems, touch side of thermostat to release static build-up before touching 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 the system.
2. Move fan switch to ON position. The blower should begin to
operate.
3. Move fan switch to AUTO position. The blower should stop
immediately.
1. Press SYSTEM key to select the Snowflake icon ( ).
2. Press
to adjust thermostat setting below room temperature. The blower should come on immediately on high speed,
followed by cold air circulation.
3. Press
to adjust temperature setting above room temperature. The cooling system should stop operating.
Before you begin configuring 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 out from the base. To replace the
cover, line up the cover with the base and press gently until the
cover snaps onto the base.
The Thermostat Buttons and Switches
1 (Up arrow) Raises temperature setting.
! CAUTION
2 (Down arrow) Lowers temperature setting.
Do not allow the compressor to run unless the compressor oil heaters have been operational for 6 hours and the
system has not been operational for at least 5 minutes.
Heating System
1. Press SYSTEM key to select the Flame icon ( ). If the auxiliary
heating system has a standing pilot, be sure to light it.
2. Press
to adjust thermostat setting to 1° above room
temperature. The heat pump system should begin to operate.
However, if the Flame icon ( ) and Snowflake icon ( ) are
flashing, the compressor lockout feature is operating (see
Configuration menu, item 3.)
3. Adjust temperature setting to 4° above room temperature. The
auxiliary heat system should begin to operate and the Flame
icon ( ) will be flashing.
4. Press
to adjust thermostat setting below room temperature. The heating system should stop operating.
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 key to select EMER. EMER will flash on the
display.
2. Press
to adjust thermostat setting above room temperature. The Aux heating system will begin to operate. The
Flame icon ( ) will display flashing to indicate that the Aux
system is operating.
3. Press
to adjust the thermostat below room temperature.
The Aux heating system should stop operating.
3 FAN switch (ON, AUTO).
4 SYSTEM key (HEAT ( ), EMER*, OFF, COOL ( ),
AUTO (
).
* EMER is available when H.P. is selected in the configuration
menu.
The Display
5 Indicates a malfunction with the system.
6 Flame icon ( ) is displayed when the SYSTEM mode is in
HEAT. Flame icon ( ) is displayed flashing when 2nd-stage
heat (Aux or Emergency) is energized. Snowflake icon ( )
is displayed (non-flashing) when the SYSTEM mode is in
COOL. Snowflake and Flame icons are displayed when the
SYSTEM mode is in AUTO. Snowflake and Flame icons
are displayed (flashing) if the thermostat is in lockout mode
to prevent the compressor from cycling too quickly.
7 EMER is displayed flashing when the system switch is in
EMER position.
8 Displays current temperature.
SYSTEM
FAN
MODE
ON AUTO
! CAUTION
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate the
cooling system
EMER
STG1+2
6
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5
CHECK THERMOSTAT OPERATION
Configuration Menu
CONTINUED FROM PAGE 4
Step
9 Displays currently programmed set temperature (this is blank
when SYSTEM switch is in the OFF position).
1
10 Stage 1 & 2 Indicators: The thermostat shall indicate when
the first and second stage is energized except in emergency
mode. The icon is STG 1 for the first stage energized. The
icons for the first and second stage energized are STG1+2
located in the lower right side of the display.
Set SYSTEM
switch to OFF
2
and
for at least 2 seconds
no HP
HP
3
and
momentarily
FA
SL
4*
and
momentarily
L
(ON)
OFF
5
and
momentarily
FA
(ON)
OFF
6
and
momentarily
CL
(OFF)
ON
7
and
momentarily
0 HI
(0)
3 LO TO
3 HI
8
and
momentarily
˚F
˚C
Configuration Menu
The configuration menu allows you to set certain thermostat
operating characteristics to your system or personal requirements.
The menu mode may be exited by pressing the system key to
change from the OFF mode or after 15 minutes has elapsed with
no keypad activity.
2. Multi-stage or Heat Pump Output Configuration – This control
can be configured for Heat Pump or two stage heat/two stage
cool multi-stage operation. The display indicates no HP (default for multi-stage mode) in the display. The Multi-stage
configuration can be toggled to HP (Heat Pump mode) by
pressing the Temperature Up or Temperature Down key. In
Multi-stage configuration, system key selection will skip
EMERgency mode.
3. Fast or Slow Cycle Selection – The factory default setting is
fast cycle, which cycles 1st stage at approximately 1.2˚F and
2nd stage 0.75˚F. If you prefer slow cycle, press the temperature key to change to SL. The 1st stage and 2nd stage would
be 1.5˚F and 1.2˚F respectively.
4. Select backlit display – (Not available on earlier models.) The
display backlight improves display contrast in low lighting
conditions. Selecting backlight ON will keep the light on continuously. Selecting backlight OFF will keep the light off.
5. In the run mode, if the setpoint temperature is manually raised
by 3°F (2°C) or more above the actual temperature with the
TEMPERATURE UP key, and the fast second stage feature is
enabled, FA on, the second stage will energize immediately.
With FA off, second stage will not energize until the setpoint
temperature is 1°F or more above actual temperature for more
than ten minutes.
6. Select Compressor Lockout CL OFF or ON – Selecting CL
ON will cause the thermostat to wait 5 minutes before turning
on the compressor if the heating and cooling system loses
power. It will also wait 5 minutes minimum between cooling and
heating cycles. This is intended to help protect the compressor
from short cycling. Some newer compressors already have a
time delay built in and do not require this feature. Your compressor manufacturer can tell you if the lockout feature is
already present in their system. When the thermostat compressor time delay occurs it will flash the Snowflake and Flame
Icons for about five minutes.
7. Select Temperature Display Adjustment 3 LO to 3 HI –
Allows you to adjust the room temperature display up to 3° higher
or lower. Your thermostat was accurately calibrated at the
factory but you have the option to change the display temperature
to match your previous thermostat. The current or adjusted
room temperature will be displayed on the left side of the display.
8. ˚F or ˚C Selection – The factory default setting for temperature
display is Fahrenheit. If you want the temperature in Celcius,
press temperature key to change to ˚C.
Press Button(s) Displayed
Press
(Factory Default) to select:
* Not available on earlier models.
6
SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
20 to 30 VAC 50/60 Hz.
0.05 to 1.0 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
7
OPERATION
The system “mode” is selected by pressing the system key. Icons
on the bottom right corner of the display will indicate the mode;
COOL ( ), AUTO (
), HEAT ( ), EMER, or OFF. In any mode
except OFF, the setpoint temperature will be shown on the right
side of the display. In OFF, this area will be blank. The current
temperature will be displayed on the left side of the display.
To operate properly in the AUTO mode, the heat setpoint temperature cannot be the same as or higher than the cool setpoint
temperature. The heat setpoint must be at least 1˚ lower than the
cool setpoint. If you are unable to raise the setpoint temperature
in HEAT or lower the setpoint temperature in COOL, you may be
at the 1˚ difference. To obtain the temperature you wish to set,
change to the opposite mode and move that setpoint away from
your temperature.
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7
OPERATION
CONTINUED FROM PAGE 5
Automatic System Changeover
When the thermostat is in the AUTO mode, both the Flame and
Snowflake icons are displayed. The thermostat will call for heat
or cool depending on the room temperature. The setpoint temperature displayed will be that of the last mode called. If the last
8
system cycle was heat, the HEAT setpoint will be displayed. If the
room temperature raises above the HEAT setpoint and the COOL
setpoint and a call for cool is required, the temperature displayed
will change to be the COOL setpoint.
TROUBLESHOOTING
Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat by removing
power from R terminal. If the thermostat has power, has been reset and still does not function correctly contact your heating/cooling service
person or place of purchase.
Symptom
Possible Cause
Corrective Action
No Heat/No Cool/No Fan
(common problems)
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage
safety interlock or door switch.
No Heat
1. Pilot light not lit.
2. System Switch not set to HEAT.
Re-light pilot.
Set System Switch to HEAT and raise setpoint
above room temperature.
Verify thermostat and system wires are securely
attached.
Many furnaces have safety devices that shut
down when a lock-out condition occurs. If the
heat works intermittently contact the furnace
manufacturer or local service person for
assistance.
3. Loose connection to thermostat or system.
4. Furnace Lock-Out Condition. Heat may also
be intermittent.
No Cool
5. Heating system requires service or
thermostat requires replacement.
Diagonistic: Set System Switch to HEAT and raise
the setpoint above room temperature. Within a few
seconds the thermostat should make a soft click
sound. This sound usually indicates the thermostat is operating properly. If the thermostat does
not click, try the reset operation listed above. If the
thermostat does not click after being reset contact
your heating and cooling service person or place
of purchase for a replacement. If the thermostat
clicks, contact the furnace manufacturer or a
service person to verify the heating is operating
correctly.
1. System Switch not set to COOL.
Set System Switch to COOL and lower setpoint
below room temperature.
Verify thermostat and system wires are securely
attached.
Same procedure as diagnostic for No Heat
condition except set the thermostat to COOL and
lower the setpoint below the room temperature.
There may be up to a five minute delay before the
thermostat clicks in Cooling.
2. Loose connection to thermostat or system.
3. Cooling system requires service or
thermostat requires replacement.
Heat, Cool or Fan Runs Constantly.
1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan system.
4. Fan Switch set to Fan On.
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Check each wire connection to verify they are not
shorted or touching together. No bare wire should
stick out from under terminal screws. Try resetting
the thermostat as described above. If the condition
persists the manufacturer of your system or
service person can instruct you on how to test the
Heat/Cool system for correct operation. If the
system operates correctly, replace the thermostat.
8
TROUBLESHOOTING
CONTINUED FROM PAGE 7
Symptom
Possible Cause
Corrective Action
Furnace/Air Conditioner Cycles Too Fast or 1. The location of the thermostat and/or the
Too Slow (narrow or wide temperature swing)
size of the Heating/Cooling System may be
influencing the cycle rate.
Digital thermostats normally provide precise
temperature control and may cycle faster than
some older mechanical models. A faster cycle
rate means the unit turns on and off more
frequently but runs for a shorter time so there is
no increase in energy use. If you would like to
increase the cycle time, refer to step 3 on the
Configuration Menu
Thermostat Setting and Thermostat
Thermometer Disagree
1. Thermostat thermometer setting requires
adjustment.
The thermometer can be adjusted +/- 3 degrees.
See Temperature Display Adjustment in the
Operation section.
Blank Display and/or Keypad Not
Responding
1. Voltage spike or static discharge.
Use the Reset Operation listed above.
Heat Setpoint Will Not Respond
to the Temperature Up Key
1. The desired setpoint conflicts with the
setpoint of the COOL mode.
Change system mode to COOL. Raise the Cool
setpoint. Return to HEAT mode and set desired
temperature.
Cool Setpoint Will Not Respond
to the Temperature Down Key
1. The desired setpoint conflicts with the
setpoint of the HEAT mode.
Change system mode to HEAT. Lower the Heat
setpoint. Return to COOL mode and set desired
temperature.
The Emerson logo is a
trademark and a service mark
of Emerson Electric Co.
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