White Rodgers 775 User's Manual
Contents
1. Possible short in wiring Possible short in thermostat Possible short in heat cool fan system 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 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 1 narrow or wide temperature swing 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 change the cycle rate to SL in the configuration menu It is not possible to shorten the cycle time If an acceptable cycle rate is not achieved as received or by changing the cycle rate Contact a local service person for additional suggestions Cooling Cycles Too Fast or Too Slow 1 narrow or wide temperature swing The location of the thermostat and the size of the Cooling System can influence the cycle rate Th2. AAA batteries are low and should be replaced Nothing else will be displayed E Displays currently programmed set temperature this is blank when SYSTEM switch is in the OFF position The word HOLD is displayed when the thermostat is in the HOLD mode OPERATING 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 AA or 7 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 WHITE RODGERS TIME PRGM RUN HOLD FAN SYSTEM Figure 8 Thermostat display buttons and switches HOLD TEMPERATURE The thermostat can hold any tem perature within its range for an indefinate period without reverting to the programmed temperature Press HOLD button HOLD will be displayed Then choose the desired hold temperature by pressing 7 or Ts The thermostat will hold the room temperature at the selected setting until you press RUN button to start progr
3. temperature 4 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 built in 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 vighe for about five minutes then turn on the compressor 5 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 6 Select F or C Readout Changes the display readout to Centigrade or Fahrenheit as required Q 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 e When heating cooling your building program the tempera tures to be cooler warmer when the building is vacant or during periods of low activity e During early morning hours the need for cooling is usually minimal Look at the factory
4. EC 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 the 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 by changing the first 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 RH RH M R V G F W H Y Cc These are four wire sin
5. 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 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 A GZ and TIME at the same time This also resets 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 with fresh AAA 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 2 System Switch not set to Heat Set System Switch to Heat and raise temp above room temp 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 condi
6. TAT OPERATION NOTE To prevent static discharge problems touch side of ther mostat 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 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 This thermostat has a time delay between cooling cycles to allow the head pressure in the compressor to stabilize If the tempera ture is adjusted to call for cool within 5 minutes of the last cycle the snowflake icon will blink indicating the thermostat is locked out After 3 to 5 minutes the compressor will start and the snowflake icon will stop flashing This helps prevent the compressor from cycling too quickly and is normal operation for the thermostat 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 AA to adjust temperature setting above room tem perature The cooling system should stop operating Heating Syst
7. 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 1 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 5F 2 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 3 Select 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 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
8. WHITE RODGERS Installation Instructions for Heating amp Air Conditioning MODEL 775 7 Day Programmable Thermostat YOUR THERMOSTAT REPLACES Typical System Compatibility Chart Standard Heat Only Two Wire Gas or Oil Fired Systems 24 volt Electronic Ignition Heat Only Two Wire Systems 24 volt Electronic Ignition Heat Only Gas or Oil Fired Systems 24 volt Standard Heat Cool Systems 24 volt Heat Cool Systems Electric Heat 24 volt Heat Only Electric Heat Systems 24 volt Cool Only Systems 24 volt Heat Pump Systems No Aux or Emergency Heat Hot Water Zone Heat Only Two Wire Systems Hot Water Zone Heat Only Three Wire Systems Line Voltage Heating or Baseboard 110 240 Volt Systems Millivolt Systems Floor or Wall Furnaces 12 VDC Mobile Home Application Multistage Systems Systems Exceding 30VAC 1 5 Amp 2 THERMOSTAT DETAILS Mounting Mounting hole Electric Gas Switch Figure 1 Thermostat base hole WHITE RODGERS EMERSON ELECTRIC CO 9797 REAVIS ROAD ST LOUIS MISSOURI 63123 5398 www white rodgers com CONTENTS Preparations eeee Thermostat Details Removing Old Thermostat cceeeee 1 Mounting and Wiring seeen 2 Check Thermostat Operation eee 3 Programming your Thermostat 2 00 4 Specifications cccccecscceeeeeeeeesneeessneeeeeseees 6 Trouble
9. actory Program ALL DAYS OF THE WEEK C same Tempore Start Time 8 00 AM 5 00 PM 10 00 PM 6 00 AM w D Press TIME once The display window will show the minutes only Press and hold either AA or amp 7 until you reach the correct minutes Press TIME once The display will show the day of the week Press AA or amp 7 until you reach the current day of the week Press RUN once The display will show the correct time and room temperature alternately Enter Heating Cooling Times and Heating Temperatures Move the SYSTEM switch to HEAT Press PRGM once MO the abbreviation for Monday will be displayed Also displayed are the currently programmed start time for the 1st heating period and the currently programmed temperature fo rthe 1st heating period flashing EXAMPLE This example shows that for the 1st Monday heating period the start time is 6 00 AM and 70 is the programmed tempera ture this example reflects factory preprogramming If the temperature displayed in not the temperature you want for Monday s period 1 press eA or amp until the correct temperature is displayed To change the displayed start time to the time you have selected for Monday s heating period 1 press TIME once the programmed time will flash Press eA or amp until your selected time is displayed The time will change in 15 minute increments Press PRGM once The currently programmed start time and heating setpoin
10. am operation again LOW BATTERY INDICATOR If the 2 AAA alkaline batter ies are low and should be replaced the display will be blank except for LO BATT When the batteries are low pressing any button will cause the display to operate for ten seconds After ten seconds the display will be blank except for LO BATT You cannot program with low batteries but you can override setpoint temperature When LO BATT occurs the thermostat will raise the temperature 10 degrees above your setpoint on COOL mode and will drop temperature 10 degrees below your setpoint on HEAT mode SIMPLIFIED COPY DAY FUNCTION This feature allows Monday s program to be copied into the rest of the week s programming This feature is only available the first time you program your thermostat To use this feature simply enter the program for Monday as described in PROGRAM MING YOUR THERMOSTAT and then press RUN or HOLD www white rodgers com Configuration Menu Press Button s Displayed Factory Default Press or to select Comments PRGM and RUN FA SL HOLD d L ON OFF HOLD E ON OFF HOLD LOC OFF ON HOLD 0 HI 0 4LOto4HI HOLD F C Select FA or SL Fast or Slow heating cycle rate Select display backlight OFF or ON Select Energy Management Recovery OFF or ON Select compressor lockout OFF or ON Select temperature display adjustment higher or lower Select temperature displa
11. e cycle rate for cooling is fixed and can not be adjusted Contact a local service person for suggestions Thermostat Setting and Thermostat 1 Thermometer Disagree Thermostat thermometer setting requires adjustment The thermometer can be adjusted 4 degrees See Temperature Display Adjustment in the Configuration menu Thermostat Does Not Follow Program 1 AM or PM set incorrectly on the clock Voltage spike or static discharge AM or PM set incorrectly in program Check current clock and program settings including the AM or PM designations for each time period If a voltage spike or a static discharge occurs use the Reset Operation listed above i 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 above Clock Loses or Gains Time 1 Loss of power to thermostat and low batteries The thermostat will maintain its program in memory even with no power no batteries but the Clock time will be incorrect when power is restored See No Heat No Cool No Fan common problems above for items to check in the system Heat or Cool Starts Early 1 EMR activated www white rodgers com See Configuration Menu Item 4
12. em 1 Move SYSTEM switch to HEAT position If the heating system has a standing pilot be sure to light it 2 Press A to adjust thermostat setting above room tempera ture The heating system should begin to operate 3 Press amp to adjust temperature setting below room tem perature The heating system should stop operating www white rodgers com CHECK THERMOSTAT OPERATION CONTINUED FROM THIRD PAGE 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 gently pull it straight out from the base To replace the cover line up the cover with the base and press gently until the cover snaps onto the base The Thermostat Buttons and Switches Up arrow Raises temperature setting Down arrow Lowers temperature setting 8 TIME button PRGM program button RUN program button HOLD button T FAN switch ON AUTO SYSTEM switch COOL OFF HEAT THE DISPLAY Indicates day of the week Q is displayed when the SYSTEM switch is in the HEAT position i is displayed non flashing when the SYSTEM switch is in the COOL position is displayed flashing when the compressor is in lockout mode Alternately displays current time and temperature LO BATT is displayed when the 2
13. gle 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 on 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 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 Battery Location This thermostat requires 2 AAA alkaline batteries to operate If the word low LO BATT is displayed the batteries are low and should be replaced with fresh AAA Energizer alkaline batteries To replace the ba
14. ng Energizing the air conditioner compressor during cold weather may cause personal injury or property damage 1 Move SYSTEM switch to COOL position 2 Follow the procedure for entering your heating program using your selected cooling times and temperature Check your programming Follow these steps to check your thermostat programming one final time before beginning thermostat operation 1 Move the SYSTEM switch to HEAT position 2 Press PRGM to view the 1st Monday heating period time and temperature Each time you press PRGM the next heating period time and temperature for Monday will be displayed in sequence Press HOLD to display Tuesday s 1st heating period program Press PRGM to check the remaining Tues day heating period times and temperatures To check each day s heating program press HOLD to change days then press PRGM to look at each programming period for the day you may change any time or temperature during this proce dure Press RUN Move SYSTEM switch to COOL position Repeat step 2 to check cooling temperatures 6 Press RUN to beging program operation YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND READY TO AUTOMATICALLY PROVIDE MAXIMUM COM FORT AND EFFICIENCY a mae 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
15. ostat and the wall mounting plate as an assembly Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat Disconnect the wires from the old thermostat one at atime DO NOT LET WIRES FALL BACK INTO THE WALL Install new thermostat using the following procedures PART NO 37 6384A Printed in U S A 0212 REMOVING OLD THERMOSTAT 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 at 9797 Reavis Road St Louis MO 63123 5398 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 Il circuits per the N
16. 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 each day programs You must program four periods for each day program www white rodgers com PROGRAMMING YOUR THERMOSTAT CONTINUED FROM FIFTH PAGE However you may use the same heating and cooling tempera tures for consecutive time periods You can choose start times heating temperatures and cooling temperatures independently for each day programs for example you may select 5 00 AM and 70 as the 1st period heating start time and temperature on Monday then select 7 00 AM and 76 as the 1st period cooling start time and temperature on Monday 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 Set Current Time and Day 1 Press TIME button once The display will show the hour only 2 Press and hold either AA or lt 7 until you reach the correct hour and AM PM designation AM begins at midnight PM begins at noon SAMPLE Heating Cooling Schedule Plan F
17. shooting 00 2 eeeeeeseeeeeseeeeeneeeteneeeeeaes 6 PREPARATIONS Assemble tools required as shown below r SK FLAT BLADE SCREWDRIVER WIRE CUTTER STRIPPER SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY HAND OR POWER DRILL WITH 3 16 INCH DRILL BIT IF NEEDED 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 A 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 Shut off electricity at the main fuse box until installation is complete Ensure that electrical power is disconnected 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 therm
18. t temperature for Monday s heating period 2 will be displayed Repeat steps 3 and 4 to select the start time and heating temperature for Monday s 2nd heating period Repeat steps 3 through 5 for Monday s 3rd and 4th heating period Monday s heating program is now complete Heating Cooling Schedule Plan www white rodgers com If you are programming your thermostat for the first time and you want programming for all days of the week to be the same as Monday s program press RUN or HOLD at this point and proceed to the SELECT COOLING TEMPERATURES section this simplified COPY DAY feature only works the first time you program your thermostat refer to COPY DAY FUNCTION if you want to copy one day s programming to a specific day program ming if you are changing your thermostat s programming you must program each day separately 8 Press HOLD once TU indicating Tuesday s program will be displayed along with the start time for the ist heating period and the currently programmed heating setpoint tem perature 9 Repeat steps 3 through 7 to complete Tuesday s heating program 10 Continue entering each day s programming until all heating periods temperatures have been selected 11 Press RUN to end heating programming Proceed to the SELECT COOLING TEMPERATURES section Enter Cooling Temperatures If the outside temperature is below 50 F disconnect power to the cooling system before programmi
19. tion occurs If the heat works intermittently contact the furnace manufacturer or local service person for assistance www white rodgers com 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 thermo stat 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 Ti 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 temp below room temp 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 ROM
20. tteries install the batteries along the top of the base see fig 1 The batteries must be installed with the posi tive ends to the right www white rodgers com MOUNTING AND WIRING CONTINUED FROM SECOND PAGE JUMPER WIRE 20 NOTE For 2 wire Heat only attach to RH and W TRANSFORMER Figure 2 Typical wiring diagram for heat only 3 wire single transformer systems JUMPER WIRE TRANSFORMER Figure 3 Typical wiring diagram for cool only 3 wire single transformer systems NOTE RED jumper wire provided with thermostat must be connected between thermostat RH and RC terminals JUMPER for proper thermostat operation with this system WIRE Neutral TRANSFORMER Figure 4 Typical wiring diagram for heat cool 4 wire single transformer systems HEATING TRANSFORMER COOLING TRANSFORMER Figure 5 Typical wiring diagram for heat cool 5 wire two transformer systems JUMPER JUMPER WIRE WIRE Reversing Compressor Fan Valve Contactor Relay 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 O CHECK THERMOS
21. y to F or C RUN Returns to normal operation Press HOLD to advance to next item or TIME to move backwards to previous item The only way to restore this feature is to complete a software reset see reset operation under TROUBLESHOOTING section e COPY DAY FUNCTION This feature allows a selected day s program to be copied to the desired days program ming To use this feature in view PRGM mode select the day to be copied from by pressing HOLD key Enter the program for the selected day as described in PROGRAMMING YOUR THERMOSTAT To enter the copy mode press the TIME key for greater than 4 seconds The LCD should display COPY the selected day of the week and the day flashing to be copied to Press the HOLD key to select the day to be copied to Press TIME to execute copy day operation and return to view program mode Press RUN key to exit O CONFIGURATION MENU The configuration menu allows you to set certain thermostat operating characteristics to your system 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 op tions 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
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