Emerson 1F73 User Manual

Installation Instructions for
Heating & Air Conditioning
1F73
Non- Programmable, Auto Changeover
Multi-stage/Heat Pump Thermostat
CONTENTS
Preparations .................................................. 1
Thermostat Details ........................................ 1
Mounting and Wiring .................................. 2-4
Specifications ................................................ 6
Operation ...................................................... 6
Troubleshooting ......................................... 7-8
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 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
* Requires common for 24 VAC at the thermostat
THERMOSTAT DETAILS
2
O/B Terminal
Switches Selection
B
O
Mounting
Hole
(O/B)Y2 E/W1 R
L
GASELEC
Elec – Gas
Switch
Figure 1. Thermostat Base
C
Y1
G
W2
Mounting
Hole
PREPARATIONS
1
Assemble tools required as shown below.
HAND OR POWER DRILL WITH 3/16 INCH DRILL BIT, IF NEEDED
FLAT BLADE SCREWDRIVER
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL
THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY
WIRE CUTTER/STRIPPER
Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury and/or property damage.
REMOVING OLD THERMOSTAT
3
CAUTION
!
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
REMOVING OLD THERMOSTAT
3
CONTINUED FROM PAGE 1
ATTENTION! This product does not contain mercury. How-
ever, 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.
MOUNTING AND WIRING
4
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.
Thermostat installation and all components of the sys­tem shall conform to Class II circuits per the NEC code.
CAUTION
!
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.
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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MOUNTING AND WIRING
4
CONTINUED FROM PAGE 2
See Note **
Emergency
E/W1
Relay
CY1
L
SYSTEM
MONITOR
SWITCH
24 VAC
(Class II Current Limited)
THERMOSTAT
R
SYSTEM
120 VAC
TRANSFORMER
Hot
Neutral
O/B/Y2
G W2
Changeover
Relay*
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
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
Fan
Relay
Aux
Relay
(Stage 2)
Figure 2. Typical wiring diagram for single transformer heat pump systems
If safety circuits are in only one of the systems, remove the transformer of the system with NO safety circuits.
O/B/Y2
CUT AND
TAPE OFF!
HOT
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
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
24 VAC
Changeover
Relay*
Compressor
Contactor
G W2
Fan
Relay
NOTE
See Note **
Emergency
Aux
Relay
(Stage 2)
Relay
TWO COMMONS MUST BE JUMPERED TOGETHER!
E/W1
CY1
SYSTEM
MONITOR
SWITCH
L
THERMOSTAT
R
SYSTEM
Limit or
Safety
Switches
24 VAC
TRANSFORMER
(Class II Current Limited)
Figure 3. Typical wiring diagram for two transformer heat pump systems with NO safety circuits
Hot
120 VAC
Neutral
CY1
SYSTEM
MONITOR
SWITCH
NOTE
L
COMMON
R
Switches
Limit or
Safety
Switches
THERMOSTAT
Limit or
Safety
24 VAC
24 VAC
ACCESSORY
RELAY N.O.
CONTACT
COMMON
Current Limited)
24 VAC 120 VAC
Heat Pump Transformer
(Class II Current Limited)
SYSTEM
Auxiliary
Heating
Transformer
(Class II
Limit or
Safety
Switches
120 VAC
The accessory relay scheme is required when safety circuits exist in both systems.
Limit or
Safety
Switches
NEUTRAL
NOTE
HOT
NEUTRAL
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
Changeover
Relay*
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
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
G W2
Fan
Relay
Aux
Relay
(Stage 2)
E/W1
See Note **
Emergency
Relay
TWO COMMONS MUST BE JUMPERED TOGETHER!
Figure 4. Typical wiring diagram for two transformer heat pump systems with safety circuits in BOTH systems
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HOT
MOUNTING AND WIRING
4
CONTINUED FROM PAGE 3
O/B/Y2*
Y1
Compressor
Contactor
Stage 2
Compressor
Contactor
Stage 1
E/W1
G
Heat
Relay
Stage 1
Fan
Relay
*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
W2
Heat
Relay
Stage 2
C* R
THERMOSTAT
SYSTEM
Hot
24 VAC 120 VAC
Neutral
TRANSFORMER
(Class II, Current Limited)
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
Multi-Stage
*O/B switch must be in O position
Malfunction
Light
24 Volt
(Common)
24 Volt
(Hot)
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)
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
THERMOSTAT TERMINALS
SYSTEM L C R W2 E/W1 (O/B)Y2 Y1 G
Single-stage compressor system; gas or electric backup
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.
Heat Pump 1 24 Volt
Malfunction
Light
(Common)
24 Volt
(Hot)
Heat mode
Emergency
2nd stage
(Aux.)
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Mode
Heat
B: Energized in Heat, Off,
Emergency Mode
O: Energized in Cool Mode
Heat and
Cool mode
1st stage
(compressor)
Blower/Fan Energized
on call for Heat
and Cool
CHECK THERMOSTAT OPERATION
5
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.
CAUTION
!
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
) will be flashing.
icon (
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.
Cooling System
1. Press SYSTEM key to select the Snowflake icon ( ).
2. Press ture. 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.
to adjust thermostat setting below room tempera-
The Thermostat Buttons and Switches
1
(Up arrow) Raises temperature setting.
(Down arrow) Lowers temperature setting.
2
3
FAN switch (ON, AUTO).
SYSTEM key (HEAT ( ), EMER*, OFF, COOL ( ),
4
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.
Displays current temperature.
8
SYSTEM
MODE
FAN
AUTO
ON
)
CAUTION
!
To prevent compressor and/or property damage, if the outdoor temperature is below 50 cooling system
°F, DO NOT operate the
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EMER
STG1+2
6
CHECK THERMOSTAT OPERATION
5
CONTINUED FROM PAGE 4
9
Displays currently programmed set temperature (this is blank when SYSTEM switch is in the OFF position).
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.
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.
Configuration Menu
Step Press Button(s) Displayed Press
1
2
3
4*
5
6
7
8
* Not available on earlier models.
SPECIFICATIONS
6
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
OPERATION
7
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.
Set SYSTEM switch to OFF
and
for at least 2 seconds
and
momentarily
and
momentarily
and
momentarily
and
momentarily
and
momentarily
and
momentarily
(Factory Default) to select:
no HP
L
(ON)
FA
(ON)
CL
(OFF)
0 HI
(0)
HP
SLFA
OFF
OFF
ON
3 LO TO
3 HI
˚C˚F
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OPERATION
7
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
TROUBLESHOOTING
8
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.
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.
Symptom Possible Cause Corrective Action
No Heat/No Cool/No Fan 1. Blown fuse or tripped circuit breaker. Replace fuse or reset breaker. (common problems) 2. Furnace power switch to OFF. Turn switch to ON.
3. Furnace blower compartment door or Replace door panel in proper position to engage panel loose or not properly installed. safety interlock or door switch.
No Heat 1. Pilot light not lit. Re-light pilot.
2. System Switch not set to HEAT. Set System Switch to HEAT and raise setpoint
above room temperature.
3. Loose connection to thermostat or system. Verify thermostat and system wires are securely
attached.
4. Furnace Lock-Out Condition. Heat may also Many furnaces have safety devices that shut be intermittent. down when a lock-out condition occurs. If the
heat works intermittently contact the furnace manufacturer or local service person for assistance.
5. Heating system requires service or Diagonistic: Set System Switch to HEAT and raise thermostat requires replacement. 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.
No Cool 1. System Switch not set to COOL. Set System Switch to COOL and lower setpoint
below room temperature.
2. Loose connection to thermostat or system. Verify thermostat and system wires are securely
attached.
3. Cooling system requires service or Same procedure as diagnostic for No Heat thermostat requires replacement. 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.
Heat, Cool or Fan Runs Constantly. 1. Possible short in wiring. Check each wire connection to verify they are not
2. Possible short in thermostat. shorted or touching together. No bare wire should
3. Possible short in heat/cool/fan system. stick out from under terminal screws. Try resetting
4. Fan Switch set to Fan On. 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.
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TROUBLESHOOTING
8
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 Digital thermostats normally provide precise Too Slow (narrow or wide temperature swing) size of the Heating/Cooling System may be temperature control and may cycle faster than
influencing the cycle rate. 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 1. Thermostat thermometer setting requires The thermometer can be adjusted +/- 3 degrees. Thermometer Disagree adjustment. See Temperature Display Adjustment in the
Operation section.
Blank Display and/or Keypad Not 1. Voltage spike or static discharge. Use the Reset Operation listed above. Responding
Heat Setpoint Will Not Respond 1. The desired setpoint conflicts with the Change system mode to COOL. Raise the Cool to the Temperature Up Key setpoint of the COOL mode. setpoint. Return to HEAT mode and set desired
temperature.
Cool Setpoint Will Not Respond 1. The desired setpoint conflicts with the Change system mode to HEAT. Lower the Heat to the Temperature Down Key setpoint of the HEAT mode. setpoint. Return to COOL mode and set desired
temperature.
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