Emerson 850 User's Manual
Contents
1. Press HOLD to advance to next item or TIME to move backwards to previous item www white rodgers com CHECK THERMOSTAT OPERATION CONTINUED FROM FIFTH PAGE HOLD TEMPERATURE The thermostat can hold any temperature within its range for an indefinite period without reverting to the programmed temperature Momentarily press HOLD button HOLD will be displayed Then choose the desired temperature by pressing O or The thermostat will hold the room temperature at the selected setting until you press RUN button to start program operation again e CONFIGURATION MENU Allows you to customize cer tain thermostat options O 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 tempera tures 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 Look at the factory preprogrammed times and temperatures shown below 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 tempera tures follow these steps Determine the time periods and temperatures for your weekday and weekend programs You must program four periods fo2. 4 Press and hold either O or until you reach the correct minutes 5 Press TIME once The display will show the day of the week Press O or until you reach the current day of the week 7 Press RUN once The display will show the correct time and room temperature alternately D Enter Heating Program 1 Move the SYSTEM switch to HEAT 2 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 70 is the programmed tempera ture this example reflects factory preprogramming 3 Press O or to change the displayed temperature to your selected temperature for the 1st heating program period 4 Press TIME once the programmed time will flash Press or until your selected time appears The time will change in 15 minute increments When your selected time is dis played press TIME again to return to the change temperature mode 5 Press PRGM once The currently programmed start time and setpoint temperature for the 2nd heating program period will appear 6 Repeat steps 3 through 5 to select the start time and heating temperature for the 2nd heating program period SAMPLE Heating Cooling Schedule Plan Factory Program Re WEEKDAY 5
3. program button HOLD temperature button T FAN switch ON AUTO 8 SYSTEM switch COOL OFF HEAT FAN SYSTEM ON AUTO COOL OFF HEAT MO TU WE TH FR SASU rt Eee U1 F LVLi_i tem AI HOLD BATT amp Figure 8 Thermostat display buttons and switches The Display Indicates day of the week 9 Flame icon is displayed when the SYSTEM switch is in the HEAT position Snowflake icon is displayed non flashing when the SYSTEM switch is in the COOL position Snowflake is displayed flashing if the thermostat is in lockout mode to prevent the compressor from cycling too quickly Displays BATT when the 2 AA batteries are low and should be replaced Only BATT with LO in the minutes 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 The word HOLD is displayed when the thermostat is in the HOLD mode HOLD is displayed flashing when the ther mostat is in a temporary HOLD Mode Displays currently programmed set temperature this is blank when SYSTEM switch is in the OFF position 5 Displays FLTR when the system has run for the programmed filter time period as a reminder to change or clean your air filter CONFIGURATION MENU The configuration menu allows you to set certain thermostat operating characteristics to your s
4. DAY SATURDAY 1 DAY SUNDAY 1 DAY Start Start Start Period Time Temperature Time Temperature Time Temperature 2N 3R aT 1s 2N 3R 4T www white rodgers com PROGRAMMING YOUR THERMOSTAT CONTINUED FROM SIXTH PAGE 7 Repeat steps 3 through 5 for the 3rd and 4th heating program periods Weekday heating programs are now complete 8 Press PRGM once SA will appear in the display along with the start time for the 1st heating period and the currently programmed temperature for Saturday 9 Repeat steps 3 through 7 to complete Saturday heating programming 10 Press PRGM once SU will appear on the display along with start time and currently programmed temperature for the 1st heating period for Sunday Repeat steps 3 through 7 to complete Sunday heating programming 11 When you have completed entering your heating program press RUN Enter Cooling Program If the outside temperature is below 50 F disconnect power to the cooling system before programming En ergizing the air conditioner compressor during cold weather may cause personal injury or property damage 1 Move SYSTEM switch to COOL position 2 Followthe procedure for entering your heating 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 1 Move SYSTEM switch to HEAT positi
5. ERMOSTAT CONTINUED FROM FIRST PAGE 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 for proper disposal 4 MOUNTING AND WIRING A 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 sys tem shall conform to Class II circuits per the NEC code Electric Heat or Single Stage Heat Pump Systems This thermostat is configured from the factory to operate a heat cool fossil fuel gas oil etc forced air system It is configured correctly for any system that DOES NOT require the thermostat to energize the fan on a call for heat If your system is an electric or heat pump system that REQUIRES the thermostat to turn on the fan on a call for heat locate th
6. FEATURES Now that you are familiar with the thermostat buttons and display read the following information to learn about the many features of the thermostat SIMULTANEOUS HEATING COOLING PROGRAM STOR AGE When programming you can enter both your heating and cooling programs at the same time There is no need to reprogram the thermostat at the beginning of each season TEMPERATURE OVERRIDE Press O or until the display shows the temperature you want The thermostat will override current programming and keep the room tempera ture atthe selected temperature until the next program period begins Then the thermostat will automatically revert to the program Configuration Menu Press Button s Displayed Press or to select Comments Factory Default PRGM and RUN HOLD 0 00 0 to 8 hrs in 15 minute increments Select temporary Hold time HOLD FA SL Select FA or SL Fast or Slow heating cycle rate HOLD d L ON OFF Select display backlight OFF or ON HOLD E ON OFF Select Energy Management Recovery OFF or ON HOLD Filter 000 0 to 1950 hours in 50 hour increments Select filter replacement run time HOLD LOC OFF ON Select compressor lockout OFF or ON HOLD 0 HI 0 4 LO to 4 HI Select temperature display adjustment higher or lower HOLD F Cc Select temperature display to F or C 2 3 4 5 6 7 8 9 RUN Returns to normal operation
7. White y CONTENTS Rodgers Preparations s cciec euclidean 1 Installation Instructions for ue E l Heating amp Cooling m Mounting and Wiring seee 2 ae F Check Thermostat Operation cccccccccees 4 INi i Specifications cecececeeeececeeeeeeeseeeeeeeeeeeees 7 Digital Model 850 Troubleshooting 0 00 ee eeeeeeeeeeeeneeeteneeeeetneeeeeee 7 5 1 1 Day Programmable Thermostat YOUR THERMOSTAT REPLACES 9 PREPARATIONS Description Assemble tools required as shown below Standard Heat amp Cooling Systems 4 or 5 wires Standard Heat Only Systems ceod Millivolt Heat Only Systems Floor or Wall Furnaces FLAT BLADE SCREWDRIVER WIRE CUTTER STRIPPER Standard Central Air Conditioning ESEJE Gas or Oil Heat SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL HAND OR POWER DRILL WITH 3 16 INCH DRILL BIT IF NEEDED Electric Furnace Hydronic Hot Water Zone Heat 2 Wires Hydronic Hot Water Zone Heat 3 Wires Heat Pump No Aux or Emergency Heat Heat Pump with Aux or Emergency Heat Baseboard Electric Heating or Line Voltage 120 or 240 volt Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury and or property damage THERMOSTAT DETAILS REMOVING OLD THERMOSTAT A CAUTION To prevent electrical shock and or equipment damage Screw anchors o prevent e quip d
8. cal wiring diagram for cool only 3 wire single transformer systems RED jumper wire provided with thermostat must be connected between thermostat RH and RC terminals 4 JUMPER for proper thermostat operation with this system Neutral TRANSFORMER Figure 4 Typical wiring diagram for heat cool 4 wire single transformer systems The 24 Volt neutral connection to terminal C on the thermostat is not required if the batteries are replaced once a year with fresh AA Energizer alkaline batteries HEATING TRANSFORMER COOLING TRANSFORMER Figure 5 Typical wiring diagram for heat cool 5 wire two transformer systems JUMPER JUMPER WIRE WIRE COO O OOOO Seca Valve Reversing valve is energized when the system switch is in the COOL position TRANSFORMER Figure 6 Typical wiring diagram for heat pump with reversing valve energized in COOL JUMPER JUMPER WIRE WIRE Reversing valve is energized when the Neutral system switch is in the HEAT position TRANSFORMER Figure 7 Typical wiring diagram for heat pump with reversing valve energized in HEAT www white rodgers com CHECK THERMOSTAT OPERATION If at any time during testing your system does not operate properly contact a qualified service person Turn on power to the system Fan Operation If your system does not have a G terminal connection skip to Heating System 1 Move FAN switch to ON position The blower sho
9. charge occurs use the Reset Operation listed below Blank Display and or Keypad Not Responding Voltage spike or static discharge 2 Battery change required Replace batteries and check heat cool system for proper operation If a voltage spike occurs use the Reset Operation listed below The Emerson logo is a trademark and a service mark of Emerson Electric Co www white rodgers com
10. e GAS ELECTRIC switch see fig 1 and switch it to the ELECTRIC position This will allow the thermostat to energize the fan immediately on a call for heat If you are unsure if the heating cooling system requires the thermostat to control the fan contact a qualified heating and air conditioning service person Hydronic Hot Water or Steam Heating Systems This thermostat is set to operate properly with a forced air heating system If you have a hydronic heating system a system that heats with hot water or steam you must set the thermostat to operate properly with your system Change the second option in the configuration menu to SL see CONFIGURATION MENU page 5 A 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 TERMINAL CROSS REFERENCE CHART New Thermostat Other Manufacturers Terminal Designation Terminal Designation R RH RH M R V G F W H Y Y Cc These are four wire single transformer systems Factory installed jumper wire between the RH and RC terminals must remain in place 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 If necessary move the electric heat switch see ELECTRIC HEAT SYSTEMS above 2 Connect wires beneath terminal screws o
11. h fresh AA Energizer alkaline batteries 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 be intermittent 2 SYSTEM Switch not set to HEAT 3 Loose connection to thermostat or system Set SYSTEM Switch to HEAT and raise temperature above room temperature Verify thermostat and system wires are securely attached 4 Furnace Lock Out Condition Heat may also 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 www white rodgers com 8 TROUBLESHOOTING CONTINUED FROM SEVENTH PAGE Symptom Possible Cause Corrective Action No Heat continued 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 belo
12. he thermostat will go back to the program temperature and HOLD will no longer blink or display Select FA or SL Fast or Slow Heating Cycle Rate The FA setting is frequently used for gas oil or electric heat The SL setting produces a longer heating cycle which is normally for hot water or steam hydronic systems Both settings produce very accurate temperature control and can be set to your personal preference FA cycles the system just under 1 F and the SL setting cycles at approximately 1 5 F Select backlit display The display backlight improves display contrast in low lighting conditions Selecting backlight ON will keep the light on for a short period of time after any key is pressed Selecting OFF will keep the light off Select Energy Management Recovery OFF or ON Energy Management Recovery EMR causes the thermostat 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 Example You select EMR and have your heating pro grammed to 65 at night and 70 at 7 AM If the building temperature 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 5 Select filter replacement run time The
13. isconnect 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 M i noe Electric Gas switch S g 3 Remove the front cover of the old thermostat With wires still Mounting attached remove wall plate from the wall If the old thermostat holes has a wall mounting plate remove the thermostat and the wall mounting plate as an assembly Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat 5 Disconnect the wires from the old thermostat one at atime DO NOT LET WIRES FALL BACK INTO THE WALL 6 Install new thermostat using the following procedures Figure 1 Thermostat base 4 A oo bcs PART NO 37 6295B S White Rodgers is a division Replaces 37 6295A fE Electri EMERSON of Emerson Electric Co nap www white rodgers com REMOVING OLD TH
14. n base using appro priate wiring schematic see figs 2 through 7 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 appear ance 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 base 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 Battery Location This thermostat requires 2 AA alkaline batteries to operate If the word LO BATTERY is displayed the batteries are low and should be replaced with fresh AA Energizer alkaline batteries To replace the batteries install the batteries along the top of the base see fig 1 The batteries must be installed with the positive ends to the right www white rodgers com MOUNTING AND WIRING CONTINUED FROM SECOND PAGE JUMPER WIRE NOTE For 2 wire Heat only Neutral attach to RH and W TRANSFORMER Figure 2 Typical wiring diagram for heat only 3 wire single transformer systems JUMPER WIRE TRANSFORMER Figure 3 Typi
15. on 2 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 weekend program periods you may change any time or temperature during this procedure Press RUN Move SYSTEM switch to COOL position Repeat step 2 to check cooling temperatures 6 Press RUN to begin program operation YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND READY TO AUTOMATICALLY PROVIDE MAXIMUM COM FORT AND EFFICIENCY OB 8 SPECIFICATIONS ELECTRICAL DATA Electrical Rating 0 to 30 VAC 50 60 Hz or D C 0 05 to 1 2 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 8 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 pressing O and TIME at the same time This resets the thermostat to the factory defaults If the thermostat has power has been reset and still does not function correctly contact your heating cooling service person or place of purchase Batteries For optimum performance we recommend replacing batteries once a year wit
16. r both the weekday and weekend program 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 both weekday and week end programs for example you may select 5 00 AM and 70 as the weekday 1st period heating start time and temperature and also choose 7 00 AM and 76 as the weekday 1st period cooling start time and temperature Use the table at the bottom of the page to plan your program time periods and the temperatures you want during each period You may also want to look at the sample program table to get an idea of how the thermostat can be programmed Entering Your Program Follow these steps to enter the heating and cooling programs you have selected SAMPLE Heating Cooling Schedule Plan Factory Program etl WEEKDAY 5 DAY SATURDAY 1 DAY SUNDAY 1 DAY Start Start Start Period Time Temperature Time Temperature Time Temperature ist sooam zor 6 ano sooam ezr a aro soopm zor 5 Fe ee Per femm zer ona oer forom oer ao oon es a ao soopm zer 5 are er Set Current Time and Day 1 Press TIME button once The display will show the hour only 2 Press and hold either O or until you reach the correct hour and AM PM designation AM begins at midnight PM begins at noon 3 Press TIME once The display window will show the minutes only
17. 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 clip Jumper W 905 as mentioned in the instructions for Hydronic Heating Systems It is not possible to shorten the cycle time If an acceptable cycle rate is not achieved as received or by clipping W 905 contact a local service person for additional suggestions Cooling Cycles Too Fast or Too Slow narrow or wide temperature swing The location of the thermostat and the size of the Cooling System can influence the cycle rate The cycle rate for cooling is fixed and can not be adjusted Contact a local service person for suggestions Thermostat Setting and Thermostat Thermometer Disagree Thermostat thermometer setting requires adjustment The thermometer can be adjusted 3 degrees See Temperature Display Adjustment in the Operation section Thermostat Does Not Follow Program AM or PM set incorrectly in program AM or PM set incorrectly on the clock Voltage spike or static discharge Check current clock and program settings including the AM or PM designations for each time period If a voltage spike or a static dis
18. thermostat will display FLTR after a set time of operation This is a reminder to change or clean your air filter This time can be set from 0 to 1950 hours in 50 hour increments A selection of 000 will 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 Changing the time in the menu also resets the timer 6 Select Compressor Lockout LOC OFF or ON Selecting LOC 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 cycles This is intended to help protect the compres sor from short cycling Some newer compressors already have atime delay builtin and do not require this feature Your compressor manufacturer can tell you if the feature is already present in their system When the compressor time delay occurs it will flash the snowflake icon for about five minutes then turn on the compressor 7 Select Temperature Display Adjustment 4 LO to 4 HI Allows you to adjust the room temperature display 4 higher or lower Your thermostat was accurately calibrated at the factory but you have the option to change the display tem perature to match your previous thermostat 8 Select F or C Readout Changes the display readout to Centigrade or Fahrenheit as required OPERATING
19. uld begin to operate 2 Move FAN switch to AUTO position The blower should stop immediately Heating System 1 Move SYSTEM switch to HEAT position If the heating system has a standing pilot be sure to light it 2 Press O to adjust thermostat setting above room tempera ture The heating system should begin to operate 3 Press to adjust temperature setting below room tempera ture The heating system should stop operating Cooling System A CAUTION To prevent compressor and or property damage 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 tempera ture The blower should come on immediately on high speed followed by cold air circulation 3 Press O to adjust temperature setting above room tempera ture 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 The Thermostat Buttons and Switches Raises temperature setting Lowers temperature setting 8 TIME button PRGM program button RUN run
20. w 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 SYSTEM Switch not set to COOL Loose connection to thermostat or system Cooling system requires service or thermostat requires replacement Set SYSTEM Switch to COOL and lower temperature 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 Heat Cool or Fan Runs Constantly AUN FAN Switch set to Fan ON Possible short in wiring Possible short in thermostat Possible short in heat cool fan system 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 below 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 Cycles Too Fast or Too Slow narrow or wide temperature swing The location of the
21. ystem or personal require ments Press RUN to make sure the thermostat is in the run program mode then press PRGM and RUN at the same time to enter the 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 HOLD to change to the next menu item or press TIME to go backwards to the previous item in the menu 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 www white rodgers com CHECK THERMOSTAT OPERATION 1 2 3 4 CONTINUED FROM FOURTH PAGE Select Temporary Hold 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 00 to 8 00 hours in 15 minute increments 0 00 disables the function Example 1 Youhave selected 3 00 hours for the Temporary Hold time period 2 With the thermostat set to HEAT or COOL press HOLD for approximately five seconds until HOLD time 3 00 indicating 3 hours appears as a setting reminder 3 After releasing the button HOLD on the display will blink 4 Use O 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 Tempo rary Hold After 3 hours t
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