EMERSON White-Rodgers 1F85-275 Auto Changeover, Multi-Stage/Heat Pump Thermostat
Operator
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YOUR THERMOSTAT REPLACES
Description | 1F85 |
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 |
CAUTION To prevent electrical shock and/or equipment dam-To prevent electrical shock and/or equipment damage disconnect electric power to system at main fuseage, disconnect electric power to system at main fuse or circuit breaker box until installation is complete.
Before removing wires from old thermostat’s switching sub-base, label each wirelabel each wirelabel each wirelabel each wirelabel each wire with the terminal designation it was removed from.
- Shut off electricity at the main fuse box until installation is complete. Ensure that electrical power is disconnected.
- Remove Old ThermostatRemove Old ThermostatRemove Old ThermostatRemove Old ThermostatRemove Old Thermostat: A standard heat/cool thermostat consists of three basic parts:
- The cover, which may be either a snap-on or hinge type.
- The base, which is removed by loosening all captive screws.
- The switching subbase, which is removed by unscrewing the mounting screws that hold it on the wall or adaptor plate.
- Remove the front cover of the old thermostat. WithWithWithWithWith wireswireswireswireswires still attachedstill attachedstill attachedstill attachedstill 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.
- Identify each wire attached to the old thermostat.
- Disconnect the wires from the old thermostat one at a time. DO NOT LET WIRES FALL BACK INTO THEDO NOT LET WIRES FALL BACK INTO THEDO NOT LET WIRES FALL BACK INTO THEDO NOT LET WIRES FALL BACK INTO THEDO NOT LET WIRES FALL BACK INTO THE WALLWALLWALLWALLWALL.
- Install new thermostat using the following procedures.
PREPARATIONS
Assemble tools required as shown below.
REMOVING OLD THERMOSTAT
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 notnotnotnotnot 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 and return to White-Rodgers at 2895 Harrison Street, Batesville, AR 72501 for proper disposal.
Warning:
- Do not use on circuits exceeding specified voltage. Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard. 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. 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)
The ELEC/GAS switch 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 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 thermo-stat 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 wir-ing information.
Caution Take 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. Personal injury and/or property damage may occur. Personal injury and/or property damage may occur.
Attach Thermostat Base to Wall
- 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.
- Connect wires beneath terminal screws on base using appropriate wiring schematic (see figs. 2 through 4).
- Place base over hole in wall and mark mounting hole locations on wall using base as a template.
- Move base out of the way. Drill mounting holes.
- 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.
- Push excess wire into wall and plug hole with a fire-resistant 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 with fresh “AA” Energizer® alkaline batteries. To replace batteries, set system 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.
Note: If safety circuits are in only one of the systems, remove the transformer of the system 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.
Heat Pump Terminal Outputs
Refer to equipment manufacturers’ instructions for specific system wiring information. You can configure the thermostat for use with the following heat pump system types:
HEAT PUMP TYPE 1HEAT PUMP TYPE 1HEAT PUMP TYPE 1HEAT PUMP TYPE 1HEAT 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 off 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 trans-former, 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 (HEAT PUMP) | ||||||||||
SYSTEM | L | C | R | W2 | E/W1 | Y2 | Y1 | G | O | B |
Heat Pump 1 | Malfunction Light | 24 Volt (Common) | 24 Volt (Hot) | Heat Mode 3rd stage Emergency mode
2nd stage |
Heat mode 2nd stage or Emergency Mode
1st stage |
No Output | Heat and Cool mode 1st stage (compressor) | Blower/Fan Energized on call for Heat
and Cool Set GAS/ELEC switch for Emergency mode |
Energized in Cool Mode | Energized in Heat OFF
Emergency mode |
Heat Pump 2 | 2nd stage
compressor |
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 con-figured for electric electric electric electric electric heat, the GGGGG 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 off 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 trans-former, 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 CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION section for proper thermostat configuration.
THERMOSTAT TERMINALS (MULTI-STAGE) | ||||||||||
SYSTEM | L | C | R | W2 | E/W1 | Y2 | Y1 | G | O | B |
Multi-stage | 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) |
Energized in Cool Mode | Energized in Heat, Off, Emergency Modes |
CHECK THERMOSTAT OPERATION
Note: To prevent static discharge problems, touch side of To prevent static discharge problems, touch side of thermostat to release static build-up before touching 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 GG G G G terminal connection, skip to Heating SystemHeating SystemHeating SystemHeating SystemHeating System.
- Turn on power to system.
- Move fan switch to OON ON ON ON N position. The blower should begin to operate.
- Move fan switch to AUAUTO AUTO AUTO AUTO TO 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 and the system has not been operational for at least 5 minutes. 5 minutes.
Heating System
- Press SYSTEM button to select the Flame icon ( ). If the auxiliary heating system has a standing pilot, be sure to light it.
- Press to adjust thermostat setting to 1° above room temperature. The heat pump system should begin to operate. The display should show STG1. However, if the set point temperature display is flashing, the compressor lockout feature is operating (see Configuration menu, item 5).
- 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 STG 1+2.
- Pressto adjust the thermostat 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.
- Press SYSTEM button to select EMER. EMER will flash on the display.
- Pressto adjust thermostat setting above room temperature. The Aux. heating system will begin to operate. The display will show STG1 flashing EMER and flame icon () to indicate that the Aux. system is operating.
- Adjust temperature setting to 3° above room temperature. The auxiliary heat system should begin to operate and the display should show STG 1+2.
- Press to adjust the thermostat below room tempera-ture. The Aux. heating system should stop operating.
Caution To prevent compressor and/or property damage, if To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system. operate the cooling system.
Cooling System
- Press SYSTEM button to select the Snowflake icon ().
- Press to adjust thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation. The display should show STG1.
- Adjust temperature setting to 3° below room temperature. The second stage cooling should begin to operate and the display should show STG 1+2.
- Pressto adjust the temperature setting above room temperature. The cooling system should stop operating.
Before you begin programming 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, pull it straight out from the base. To replace the cover, line up the cover with the base and press until the cover snaps onto the base.
- Raises temperature setting
- Lowers temperature setting.
- TIME button.
- PRGM (program) button.
- RUN (run program) button.
- HOLD temperature button.
- FAN switch (ONONONONON, AUTOAUTOAUTOAUTOAUTO)
- SYSTEM button (COOL, AUTO, HEAT, EMER, OFF)
The Display - Indicates day of the week.
- Flame icon ( ) is displayed when the system is in HEAT mode. Snowflake icon () is displayed when the system is in COOL mode. Flame icon() and Snowflake icon () are displayed simultaneously when thermostat is in AUTO mode.
- Displays BATT when the 2 “AA” batteries are low and should be replaced. Only BATT and LO in the minutes LO field are displayed when batteries are low with no system power.
- Alternately displays current time and temperature. Displays LO in the minutes field when batteries are low. LO
- The word HOLD is displayed when the thermostat is HOLD in the HOLD mode. HOLD is displayed flashing when the thermostat is in a temporary HOLD mode. when the thermostat is in a temporary HOLD mode.
- Displays currently programmed set temperature (this is blank when SYSTEM is OFF).
- Displays FLTR when the system has run for the programmed filter time period as a reminder to change or clean your filter.
- Display ( ) when in keypad lockout mode.
- EMER is displayed flashing when the system is in EMER mode.
- Indicates a fault in the heating/cooling system. It does not indicate a fault in the thermostat.
- Display (L ) when limited range is activated.
- Stage1 & 2 indicators: The thermostat shall indicate when the first and second stage is energized except in emergency mode. The icon is STG 1for the first stage energized. The icons for the first and second stage energized are STG1+2located in the upper side of the display.
The configuration menu allows you to set certain thermostat operating characteristics to your system or personal require-ments. Set SYSTEM button to OFF, then simultaneously pressandto enter configuration menu. The display will show the first item in the configuration menu. The configuration menu table summarizes the configuration options. An explanation of each option follows.
Press SYSTEM to change to the next menu item. To exit the menu and return to the program operation, press RUN. If no keys are pressed within fifteen minutes, the thermostat will revert to normal operation.
- Single Stage, Multi-stage or Heat Pump System Configuration – Configuration This control can be configured for Heat Pump or two stage heat/two stage cool multi-stage operation. The display indicates MS 2 (default for multi-stage
- Programmable Periods – This control can be configured for 4, 2 or 0 programmable periods. The display indicates PRG 4 in the display as default. The programmable periods can be toggled to 2 or 0 by pressing the or keys. With PRG 4 0 selected for non-programmable, system key selection will skip EMR (item 3) and temporary program over-ride (item 10).
- Select Energy Management Recovery OFF or ONSelect Energy Management Recovery OFF or ONSelect Energy Management Recovery OFF or ONSelect Energy Management Recovery OFF or ONSelect Energy Management Recovery OFF or ON –Energy Management Recovery (EMR) causes the thermo-stat to start heating or cooling early to make the building temperature reach the program setpoint at the time you specify. Heating will start 5 minutes early for every 1° of temperature required to reach setpoint.
Press the System button until OFF is displayed, then press the and simultaneously
INSTALLER/CONFIGURATION MENU Step
Press Button(s) Displayed (Factory Default) Press or to select Comments
1 System MS 2 SS1, HP2, HP1 Selects Single stage, Multi-stage, or Heat Pump (Single stage or 2-stage) System Configuration 2 System PRG 4 PRG 0, PRG 2 Selects Programmable Periods 3 System EMR (ON)
OFF Selects Energy Management Recovery OFF or ON 4 System FA SL Selects Fast or Slow Cycle Selection 5 System CL (OFF)
CL (ON)
Selects Compressor Lockout CL OFF or ON 6 System CDL (ON)
CDL (OFF)
Selects Backlight Display 7 System FA (ON)
FA (OFF)
Selects Fast Second Stage ON or OFF 8 System 0 FLTR 50-1950 (increments of 50) Selects filter replacement run time 9 System 0°F (Room Temperature)
4 LO to 4 HI Selects Temperature Display Adjustment 4 LO to 4 HI 10 System 4:00 HOLD 0:15 to 8:00 (increments of 15 minutes)
Selects Temporary Program Override Time 11 System °F °C For °C selection 12 System LR (90)
LR 62 to LR89 Selects Limited HEAT range 13 System LR (45)
LR 46 to LR 82 Selects Limited COOL range 14 System CA (OFF)
CA (ON)
Feature Not Available 15 System (OFF) (ON) Selects Keypad Lockout 16 0 001 to 999 Selects Keypad lockout combination number Press System to set code
17 Run Returns to the OFF position Example: You select EMR and have your heating program-med to 65° at night and 70° at 7 AM. If the building temp-erature is 65° the difference between 65° and 70° is 5°. Allowing 5 minutes per degree the thermostat setpoint will change to 70° at 6:35 AM. Cooling allows more time per degree because it takes longer to reach temperature.
- 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.
- 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 compres-sors 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 setpoint for about five minutes.
- Select Backlight Display – The display backlight improves display contrast in low lighting conditions. When the “C” terminal is powered, selecting backlight CdL ON will keep the light on continuously. Select backlight OFF will keep the light on momentarily after any key is pressed. When the “C” terminal is not powered, the light will be on momentarily after any key is pressed no matter the backlight is selected ON or OFF.
- Select (Fast) Second Stage ON or OFF– In the run mode, if the setpoint temperature is manually raised by 3°F (2°C) or more above the actual temperature with the , 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 min-utes.
- Select filter replacement run time – The thermostat will display FLTR after a set time of operation. This is a remind-er to change or clean your air filter. This time can be set from 0 to 1950 hours in 50 hour increments. A selection of 000A selection of 000A selection of 000A selection of 000A selection of 000 will cancel this featurewill cancel this featurewill cancel this featurewill cancel this featurewill cancel this feature. When FLTR is displayed, you can clear it by pressing HOLD and RUN at the same time. This resets the timer and starts counting the hours until the next filter change. Contact your system manufacturer for a specific replacement/maintenance interval.
- Select Temperature Display Adjustment 4 LO to 4 HI–Allows you to adjust the room temperature display up to 4°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 cur-rent or adjusted room temperature will be displayed on the left side of the display.
- Select Temporary Program Override Time – The thermostat can hold any temperature you set it to for the amount of time you select on this option. Your choices are 0:15 to 8:00 hours in 15 minute increments.
Example:- You have selected 3:00 hours for the Temporary Pro-gram Override time period.
- With the thermostat set to Heat or Cool, press HOLD for approximately 5 secondsfor approximately 5 secondsfor approximately 5 secondsfor approximately 5 secondsfor approximately 5 seconds until HOLD time (3:00 indicating 3 hours) appears as a setting reminder.
- After releasing the button, HOLD on the display will blink.
- Use or to set the temperature to your preference. The thermostat will maintain this temperature setting for 3 hours with HOLD blinking to remind you it is in Temporary Hold. After 3 hours, the thermostat will go back to the program temperature and HOLD will no longer blink or display.
- Select F° or C° Readout – Changes the display readout to Centigrade or Fahrenheit as required.
- Limited Heat Range This feature provides a maximum setpoint temperature for heat. The default setting is 90°F. It can be changed between 62°F and 89°F by pressing the temperature uptemperature uptemperature uptemperature uptemperature up or temperature downtemperature downtemperature downtemperature downtemperature down key.
- Limited Cool Range– This feature provides a minimum setpoint temperature for cool. The default setting is 45°F. It can be changed between 46°F and 82°F by pressing the temperature up or temperature down key.
- This feature not available
- Keypad Lockout– This menu selection will display lock icon. The and are used to toggle the function and display the lock icon and OFF (keypad not locked out, default) indicating in the time digits to the lock icon and NO (keypad locked out). When the keypad lockout function is enabled (ON), and the SYSTEM key is pressed again, the display will indicate the number 0 (default, still disabled) in the time digits. The and are used to set the combina-tion number from 0 to 999. “0” will not be a valid combination. If a combination of 00000 is selected and the system key is pressed the menu will be exited and keypad lockout will not be evoked. If 1 to 999 is selected and the SYSTEM key is pressed again, the combination is locked into non-volatile memory and the menu is exited. The lock icon (to designate keypad locked with a valid combination) will display when the menu is exited. The system key will operate for 10 seconds after the menu mode is exited to allow the user to change the mode from OFF to the desired system mode. While the keypad is locked out, a simultaneous press of the temperature and will enter the menu item from any mode instead of only OFF mode. When the menu is entered with the keypad lockout feature enabled, the first menu item displayed is the combination code 0. Theor keys are used to set the combination unlock number from 0 to 999. If the unlock number matches exactly with the combination lock number stored in memory when the SYSTEM key is pressed, the keypad is unlocked and the lock icon is removed. If the unlock number does not match when the SYSTEM key is pressed, menu is exited and the keypad remains disabled. To reset the combination code and unlock the keypad if the code is forgotten, see troubleshooting section.
SPECIFICATIONS
ELECTRICAL DATA
- Electrical Rating:
- 20 to 30 VAC 50/60 Hz or DC
- 0.05 to 1.5 Amps (Load per terminal)
- 2.5 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
The system “mode” is selected by pressing the SYSTEM button. Icons on the bottom right corner of the display will indicate the mode: COOL (), AUTO ( ), HEAT ( ), EMER, or OFF. In any mode except OFF OFF, the setpoint temperature will OFF be shown on the right side of the display. In OFF, this area will OFF 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.
Automatic System Changeover
When the thermostat is in the AUTO mode, both the AUTO Flame and Flame Snowflake 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 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.
OPERATION
Second Stage Time Delay
Your thermostat is designed to determine the optimum time to activate the second stage. Simply raising the temperature in heating or lowering it in cooling will not always force the thermostat to bring the second stage on quickly. There is a time delay from 0-30 minutes depending on the performance of the first stage of the system.
EXAMPLE: For the last 2 hours the thermostat is set on 70° and the room temperature is 70° with the equipment using only the first stage of heat. Since the equipment is keeping the temperature within 1 degree of setpoint, the thermostat will delay second stage for a longer time if you manually raise the temperature or if the room temperature quickly changes. Once the second stage comes on, it will come on sooner the next time there is a difference between the setpoint and the room temperature. The net effect of the staging program is that when the first stage is capable of making temperature the second stage will delay longer. When the thermostat calculates that first stage cannot make temperature in a reasonable time, the second stage will come on sooner. This built in function automatically optimizes the use of additional stages of heat or cool.
Manual Operation
Permanent Program Override (HOLD)–With the SYSTEM button set to HEAT or COOL, press the HOLD button once and release. HOLD will be displayed. Use orto adjust the temperature. The thermostat will hold the room temperature at the selected setting until you press RUN button to start program operation again.
Temperature Override – Press or until the display shows the temperature you want. The thermostat will override current programming and keep the room temperature at the selected temperature until the next program period begins. Then the thermostat will automatically revert to the program.
Temporary Program Override – The thermostat will override current programming and keep the room temperature at the selected temperature for a programmed time period whenever or keys are pressed. Once in the menu mode, press or to change the time period.
PROGRAMMING YOUR THERMOSTAT
This section will help you plan your thermostat’s program to meet your needs. For maximum comfort and efficiency, keep the following guidelines in mind when planning your program.
- When heating (cooling) your building, program the temperatures to be cooler (warmer) when the building is vacant or during periods of low activity.
- During early morning hours, the need for cooling is usually minimal
Planning Your Program
Look at the factory preprogrammed times and temperatures shown in the sample schedule. If this program will suit your needs, simply press the RUN button to begin running the factory preset program.
If you want to change the preprogrammed times and temperatures, follow these steps. Determine the time periods and temperatures for your program. You must program four periods for each day. However,
you may use the same heating and cooling temperatures for consecutive time periods. You can choose start times, heating temperatures, and cooling temperatures independently (for example, you may select 5:00 AM and 70° as the weekday 1st period heating period heating start time and temperature and also choose 7:00 AM and 76° as the weekday 1st period cooling 1st period cooling start time and temperature).
Use the table to plan your program time periods and the temperatures you want during each period. Fill in the complete table to have a record of your programs
SAMPLE
Heating/Cooling Schedule Plan (Factory Program)
Period |
WEEKDAYS
(5 Day) |
SATURDAY
(1 Day) |
SUNDAY
(1 Day) |
||||
Start Time |
Temp |
Start Time |
Temp |
Start Time |
Temp |
||
HEAT | 1ST | 6:00 AM | 70 F | 6:00 AM | 70 F | 6:00 AM | 70 F |
2ND | 8:00 AM | 62 F | 8:00 AM | 62 F | 8:00 AM | 62 F | |
3RD | 5:00 PM | 70 F | 5:00 PM | 70 F | 5:00 PM | 70 F | |
4TH | 10:00 PM | 62 F | 10:00 PM | 62 F | 10:00 PM | 62 F | |
COOL | 1ST | 6:00 AM | 78 F | 6:00 AM | 78 F | 6:00 AM | 78 F |
2ND | 8:00 AM | 85 F | 8:00 AM | 85 F | 8:00 AM | 85 F | |
3RD | 5:00 PM | 78 F | 5:00 PM | 78 F | 5:00 PM | 78 F | |
4TH | 10:00 PM | 82 F | 10:00 PM | 82 F | 10:00 PM | 82 F |
Heating/Cooling Schedule Plan
Period |
WEEKDAYS
(5 Day) |
SATURDAY
(1 Day) |
SUNDAY
(1 Day) |
||||
Start Time |
Temp |
Start Time |
Temp |
Start Time |
Temp |
||
HEAT | 1ST | ||||||
2ND | |||||||
3RD | |||||||
4TH | |||||||
COOL | 1ST | ||||||
2ND | |||||||
3RD | |||||||
4TH |
Entering Your Program
Set Current Time and Day
- Press TIME button once. The display will show the hour only.
EXAMPLE: - Press and hold either or until you reach the correct hour and AM/PM designation (AM begins at mid- AM night; PM begins at noon). PM
- Press TIME once again. The display window will show the minutes only.
EXAMPLE: - Press and hold either oruntil you reach the correct minutes.
- Press TIME once again. The display will show the day of the week.
- Press oruntil you reach the current day of the week.
- Press RUN once. The display will show the correct time and room temperature alternately.
Enter Heating Program
- Press the SYSTEM button to HEAT.
- Press PRGM once. “MO TU WE TH FR” (indicating weekday program) will appear in the display. Also displayed are the currently programmed start time for the 1st heating period and the currently programmed temperature (flashing).
EXAMPLE:
This display window shows that for the 1st weekday period, the start time is 6:00 AM and 68° is the programmed temperature (this example reflects factory preprogramming. - Press orto change the displayed temperature to your selected temperature for the 1st heating program period.
- Press TIME once (the programmed time will flash). Press oruntil your selected time appears. The time will change in 15 minute increments. When your selected time is displayed, press TIME again to return to the change temperature mode.
- Press PRGM once. The currently programmed start time and setpoint temperature for the 2nd heating 2nd heating program period will appear.
- Repeat steps 3 and 4 to select the start time and heating temperature for the 2nd heating program period.
- Repeat steps 3 through 5 for the 3rd and 4th heating program periods.
- Press PRGM once “SA” (indicating Saturday program) SA will appear in the display, along with the start time for the 1st heating period and the currently programmed temperature.
- Repeat steps 3 through 7 to complete Saturday heating programming.
- Press PRGM once to change to SU (Sunday) heating programming and repeat steps 3 through 7 to complete Sunday programming.
- When you have completed entering your heating program, press RUN.
Enter Cooling Program
Caution: If the outside temperature is below 50°F, disconnect If the outside temperature is below 50°F, disconnect power to the cooling system before programming. power to the cooling system before programming. Energizing the air conditioner compressor during cold weather may cause personal injury or property damage.
- Press SYSTEM button to COOL position.
- Follow Enter Heating Program for entering your cooling program, using your selected cooling times and temperatures.
CHECK YOUR PROGRAMMING
Follow these steps to check your thermostat programming one final time before beginning thermostat operation.
- Press SYSTEM button to HEAT position.
- Press PRGM to view the 1st weekday heating period time and temperature. Each time you press PRGM, the next heating period time and temperature will be displayed in sequence for weekday, then Saturday and Sunday program periods (you may change any time or temperature during this procedure.
- Press RUN.
- Press SYSTEM button to COOL position.
- Repeat step 2 to check cooling program.
- Press SYSTEM button to HEAT or HEAT COOL and press RUN to begin program operation.
NOTE: Batteries are not required to keep your programming or menu data. With two optional “AA” batteries installed, your thermostat will maintain time and continuously display the temperature during a loss of AC power. Installed batteries will also allow programming prior to installation.
YOUR THERMOSTAT IS NOW PROGRAMMED AND READY TO PROVIDE MAXIMUM COMFORT AND EFFICIENCY!
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 the wires from terminals R and C and removing batteries for 2 minutes. After resetting the thermostat, replace the wires and batteries. If the thermostat 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.
3. Loose connection to thermostat or system. 4. Furnace Lock-Out Condition. Heat may also be intermittent.
5. Heating system requires service or thermostat requires replacement. |
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. Diagnostic: 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. |
No Cool | 1. System Switch not set to COOL.
2. Loose connection to thermostat or system. 3. Cooling system requires service or thermostat requires replacement. |
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 condi- tion 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.
2. Possible short in thermostat. 3. Possible short in heat/cool/fan system. 4. Fan Switch set to Fan On. |
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. |
Furnace
(Air Conditioner) Cycles Too Fast or Too Slow (narrow or wide temperature swing) |
1. The location of the thermostat and/or the size of the Heating 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, choose SL for slow cycle in the menu, step 4. If an acceptable cycle rate is not achieved as received or by choosing slow cycle, contact a local service person for additional suggestions. |
Symptom | Possible Cause | Corrective Action |
Thermostat Setting & Thermostat Thermometer Disagree | 1. Thermostat thermometer setting requires adjustment. | The thermometer can be adjusted +/- 3 degrees. See Temperature Display Adjustment in the Configuration Menu section. |
Blank Display and/or Keypad Not Responding | 1. Voltage spike or static discharge. | Use the Reset Operation at top of previous page. |
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. |
Forgot Keypad Lockout Code | CAUTION: This resets the thermostat to factory default settings of the configuration menu. After performing this reset, the thermostat will require configuration again. Be sure that you know the required configuration settings before resetting.
With the thermostat in any mode, press and at the same time to enter the configuration menu at the point where the lockout code is to be entered. Press and SYSTEM button at the same time to reset the lockout code, unlock the keypad and reset all configuration menu settings. |
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Why won’t my 2nd or 3rd stage come on? | Your thermostat is designed to determine the optimum time to activate the second stage. Simply raising the temperature in heating or lowering it in cooling will not always force the thermostat to bring the second stage on quickly. There is a time delay from 0-30 minutes depending on the performance of the first stage of the system. |
The Emerson logo is a trademark and service mark of Emerson Electric Co.
Reference
Download manual: EMERSON White-Rodgers 1F85-275 Auto Changeover, Multi-Stage/Heat Pump Thermostat
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