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Manual Universal Electronics 975

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  • Universal Electronics 975 - page 1

    Comfor t-Set ® 90 Series 90 Series 90 Series 90 Series 90 Series TM PREMIUM Model 975 Model 975 Model 975 Model 975 Model 975 Installation and Operating Installation and Operating Installation and Operating Installation and Operating Installation and Operating Instructions Instructions Instructions Instructions Instructions Retain for Future Use U ...

  • Universal Electronics 975 - page 2

    17 16 4 3 5 6 2 1 7 8 9 10 11 12 13 14 15 Easy, Menu-Driven Set-Up Easy, Menu-Driven Set-Up Easy, Menu-Driven Set-Up Easy, Menu-Driven Set-Up Easy, Menu-Driven Set-Up and Programming and Programming and Programming and Programming and Programming Premium options to customize the thermosta t to fit your applica tion. ...

  • Universal Electronics 975 - page 3

    1 INTR ODUCTION Thank you for purchasing your new Model 975 thermo- stat. White-Rodgers has been producing energy sa ving controls for ov er 60 years. W e ha ve been designing and producing the Comfort-Set family of electronic program- mable thermostats since 1982. Model 975 is the third generation of the electronic programmable family . W e believ ...

  • Universal Electronics 975 - page 4

    2 THE THERMOSTAT BUTTONS THE THERMOSTAT BUTTONS THE THERMOSTAT BUTTONS THE THERMOSTAT BUTTONS THE THERMOSTAT BUTTONS See inside front cov er for illustration showing button locations. 1 (Blue arrow) Lo wers temperature setting (45°F or 7°C minimum) 2 (Red arrow) Raises temperature setting (99°F or 37°C maximum) 3 The yellow indicator glo ws whe ...

  • Universal Electronics 975 - page 5

    3 FAN AUTO HRS CHECK BATTERY STAT SYSTEM ° F AM MON PRG FAN ON HEAT HEAT HRS CHECK BATTERY ° F AM MON WED THU FRI SAT SUN TUE WED THU FRI SAT SUN TUE 18 18 19 20 21 21 22 25 23 24 Figure 1. The Display Orientation THE DISPLAY THE DISPLAY THE DISPLAY THE DISPLAY THE DISPLAY 18 Displays system mode ( HEA HEA HEA HEA HEA T T T T T, OFF OFF OFF OFF O ...

  • Universal Electronics 975 - page 6

    4 INST ALLA TION Model 975 : 7 Day programming ELECTRICAL DATA ELECTRICAL DATA ELECTRICAL DATA ELECTRICAL DATA ELECTRICAL DATA Electrical Rating: 17 to 30 V AC, 50/60 Hz 0.05 to 1.5 Amps 1.5 Amps maximum total load (all terminals combined) Standard Systems: Fuel : gas, oil, electric. T ype : Heating/Cooling, Heat Only , Hot W ater or Steam Systems, ...

  • Universal Electronics 975 - page 7

    5 Installation PRECAUTIONS PRECAUTIONS PRECAUTIONS PRECAUTIONS PRECAUTIONS ▲ ! WARNING WARNING WARNING WARNING WARNING Do not shor t out ter minals on gas valv e or primar y control to test. Shor t or incor rect wiring will damage ther mostat and could cause personal injur y and/or proper ty damage . Do not use on circuits ex ceeding specified v ...

  • Universal Electronics 975 - page 8

    6 ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! This product does not contain mercury . Howe ver , 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 . W earing non- absorbent glov es, take up the spilled mercury with sand or other absorbent materi ...

  • Universal Electronics 975 - page 9

    7 Installation Insert the wires into the terminals on the base using the appropriate wiring diagram and tighten the terminal screws. CONFIGURING CONFIGURING CONFIGURING CONFIGURING CONFIGURING AND PROGRAMMING AND PROGRAMMING AND PROGRAMMING AND PROGRAMMING AND PROGRAMMING Befor e the power is turned on , the thermostat must be configured to operate ...

  • Universal Electronics 975 - page 10

    8 WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS All wiring diagrams are for typical systems only . Refer to equipment manufacturers’ instructions for specific system wiring information. MV 6 Y G W O B RC RH H M V W R H R C GYOB 6 W RH 1 2 3 E L M K J I Figure 2. Typical wiring diagram for heating only, two-wire, ...

  • Universal Electronics 975 - page 11

    9 Installation MV 6 Y G W O B RC RH H M V W R H R C GYO B 6 G Y 5 3 C 2 D E 4 RH W 1 L M K J I Figure 3. Typical wiring diagram for heat only, cool only, & heat/cool single transformer system Figure 3. Typical wiring diagram for heat only, cool only, & heat/cool single transformer system Figure 3. Typical wiring diagram for heat only, cool ...

  • Universal Electronics 975 - page 12

    10 MV 6 Y G W O B RC RH M V W R H R C GYO B 6 MV RH 1 A WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS 1 F r om milliv olt system NO TE: Ther mostat must ha ve batteries installed. A Milliv olt System B Zone V alve C Cooling System D Fan R elay E Hea ting System F Changeov er Relay Energized in Cooling (Single Stage ...

  • Universal Electronics 975 - page 13

    11 Installation 1 F rom heating system 2 F rom 24 V AC transformer 3 F rom fan relay 4 F rom cooling system NO TE: Thermosta t must have batteries installed. MV 6 Y G W O B RC RH M V W R H R C GYOB 6 M V RH A G Y 4 C D 3 RC 2 1 L M K J 1 I Figure 5. Typical wiring diagram for two-wire millivolt heating & three-wire cooling system Figure 5. Typi ...

  • Universal Electronics 975 - page 14

    12 WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS H MV W RH RC G Y O B 6 W R H 1 2 6 1 3 B MV 6 Y G W O B RC RH 64 5 2 1 L M K J I 1 F rom zone valve 2 F rom 24 V AC transformer (through zone valve) 3 Red jumper wire (provided) NO TE: Ther mostat must have batteries installed. NO TE: Ensure that RED RH/RC jumper wir ...

  • Universal Electronics 975 - page 15

    13 MV 6 Y G W O B RC RH M V W R H R C GYO B 6 W RH 1 2 E N O C D RC G Y 5 3 4 L M K J L M K J Figure 7. Typical wiring diagram for heat/cool, five-wire, two-transformer system Figure 7. Typical wiring diagram for heat/cool, five-wire, two-transformer system Figure 7. Typical wiring diagram for heat/cool, five-wire, two-transformer system Figure 7. ...

  • Universal Electronics 975 - page 16

    14 MV 6 Y G W O B RC RH H P MV W RH RC G Y O B 6 RC G Y 5 2 C 1 D 4 3 L M K J I F G WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS WIRING DIAGRAMS Figure 8. Typical wiring diagram for single stage heat pump, four-wire, single transformer system Figure 8. Typical wiring diagram for single stage heat pump, four-wire, single transform ...

  • Universal Electronics 975 - page 17

    15 Installation JUMPERS JUMPERS JUMPERS JUMPERS JUMPERS Before turning power on to the system, the jumpers on the back of the thermostat must be configured to operate correctly with the system equipment. This thermostat is configured from the factory to operate a standard fossil fuel (gas, oil, etc.), forced hot air system with a single stage air c ...

  • Universal Electronics 975 - page 18

    16 Step Press Button(s) Displayed (F actory Default) Press or to select: COMMENTS 1 EMR (ON) OFF 2 SET CYCL HEA T (05) 02 - 40 Adjusts heat anticipation value (2 through 40) 3 SET CYCL COOL (14) 09 - 40 4 COOL F AN DELA OFF (01) 01 - 127 5 COOL F AN DELA ON (04) 01 - 05 6 COMP LOCK (ON) OFF 7 SYSTEM (HEA T -OFF-COOL-A UT O) HEA T -OFF , COOL-OFF , ...

  • Universal Electronics 975 - page 19

    17 8 0 ˚ F (0) 5 LO to 5 HI 9 ( ˚ F) C 11 REMT SEN (OFF) ON Selects remote sensor OFF or ON 12 P AR T LOCK (OFF) ON Selects partial keypad lock out OFF or ON 13 LOCK (OFF) ON Selects total keypad lock out OFF or ON 14 Returns to normal operation 10 BEEP (ON) OFF T urns beeper ON or OFF Adjusts temperature display higher or lower Adjusts temperatu ...

  • Universal Electronics 975 - page 20

    18 CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION INSTALLER INSTALLER INSTALLER INSTALLER INSTALLER CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION The configuration settings can be changed at any time to meet system or personal requirements. Press PROGRAM RUN to make certain the thermostat is in the run ...

  • Universal Electronics 975 - page 21

    19 Installation COOLING is from 9 to 40. The factory preset is 14. The recom- mended initial setting for hydronic systems is 35. The cooling will not go below 9 because compressors require a longer cycle. The chart below sho ws how this adjustment range affects thermostat performance. HEA TING COOLING Anticipation V alue Cycle Length Differential T ...

  • Universal Electronics 975 - page 22

    20 CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION would be set so the fan shuts of f just as the cool air is exhausted. If this timing is set too long the fan may begin blo wing warm air before it shuts off. Shortening the f an-off delay will prev ent this. COMPRESSOR LOCKOUT COMPRESSOR LOCKOUT COMPRESSOR LOCKOUT COMPRESSOR L ...

  • Universal Electronics 975 - page 23

    21 temperature display . This is an excellent feature if the thermostat is in a poor location for sensing temperature or the thermo- stat is in a separate room to prev ent tampering. NOTE The remote sense featur e will not work if the system does not pro vide 24V to the thermostat (example: millivolt heating-only systems or 3-wire zone valv es). T ...

  • Universal Electronics 975 - page 24

    22 COOLING SYSTEM COOLING SYSTEM COOLING SYSTEM COOLING SYSTEM COOLING SYSTEM CHECK THERMOSTAT OPERATION CHECK THERMOSTAT OPERATION CHECK THERMOSTAT OPERATION CHECK THERMOSTAT OPERATION CHECK THERMOSTAT OPERATION T o pr event compressor and/ or property damage, if the outdoor temperature is below 50°F (10°C), DO NO T operate the cooling system. 1 ...

  • Universal Electronics 975 - page 25

    23 The configuration menus allo w you to set certain thermostat operating characteristics to your system or personal requirements. T o enter the User Configuration menu, press PROGRAM RUN to make sure the thermostat is in the run program mode, then press TIME FWD and TIME BACK at the same time to enter the configuration menu. The display will show ...

  • Universal Electronics 975 - page 26

    24 CONFIGURATION MENU CONFIGURATION MENU CONFIGURATION MENU CONFIGURATION MENU CONFIGURATION MENU Step Press Button(s) Displayed (F actory Default) Press or to select: COMMENTS 1 EMR (ON) OFF 2 SET CYCL HEA T 3 SET CYCL COOL 4 COOL F AN DELA OFF 5 COOL F AN DELA ON 6 COMP LOCK 7 SYSTEM Selects EMR option ON or OFF TIME FWD TIME FWD TIME FWD TIME FW ...

  • Universal Electronics 975 - page 27

    25 Configuration 8 0 ˚ F (0) 5 LO to 5 HI 9 ( ˚ F) ˚ C 11 REMT SEN 12 P AR T LOCK (OFF) ON Selects partial keypad lock out OFF or ON 13 LOCK (OFF) ON Selects total keypad lock out OFF or ON 14 Returns to normal operation 10 BEEP (ON) OFF T urns beeper ON or OFF Adjusts temperature display higher or lower Adjusts temperature display to ˚ F or ˚ ...

  • Universal Electronics 975 - page 28

    26 PR OGRAMMING MANUAL OPERATION MANUAL OPERATION MANUAL OPERATION MANUAL OPERATION MANUAL OPERATION Y our Comfort-Set 90 thermostat can be used to control temperature manually (without programming). For manual operation, press SYSTEM to select HEAT HEAT HEAT HEAT HEAT or COOL COOL COOL COOL COOL , then press PROGRAM HOLD . Use or to set the temper ...

  • Universal Electronics 975 - page 29

    27 Programming and the settings for time and temperature. 9. If you program Monday the first time you press PROGRAM VIEW it will be copied to the rest of the week. T o program the other days of the week press ADV . / DA Y to until you reach the day you wish to change and follow Steps 10, 11 & 12. Y ou can also copy the program from one day to a ...

  • Universal Electronics 975 - page 30

    28 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ° C) 5:00 PM 5:00 PM 5:00 PM 5:00 PM 5:00 PM 5:00 PM 5:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ° C) 62 ° F (16 ...

  • Universal Electronics 975 - page 31

    29 82 ° F (27 ° C) 82 ° F (27 ° C) 82 ° F (27 ° C) 82 ° F (27 ° C) 82 ° F (27 ° C) 82 ° F (27 ° C) 82 ° F (27 ° C) 5:00 PM 5:00 PM 5:00 PM 5:00 PM 5:00 PM 5:00 PM 5:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 10:00 PM 85 ° F (29 ° C) 85 ° F (29 ° C) 85 ° F (29 ° C) 85 ° F (29 ° C) 85 ° F (29 ° C) 85 ° F (29 ...

  • Universal Electronics 975 - page 32

    30 7 Day Personal HEA T Program Schedule 1 Morning (MOR) 2 Day (DA Y) 3 Evening (EVE) 4 Night (NHT) 5 Start T ime 6 T emperature MON TUE WED THU FRI SA T SUN 1 5 6 5 6 5 6 5 6 2 3 4 ...

  • Universal Electronics 975 - page 33

    31 7 Day Personal COOL Program Schedule MON TUE WED THU FRI SA T SUN 1 5 6 5 6 5 6 5 6 2 3 4 1 Morning (MOR) 2 Day (DA Y) 3 Evening (EVE) 4 Night (NHT) 5 Start T ime 6 T emperature Programming ...

  • Universal Electronics 975 - page 34

    32 FEA TURES Large Lighted Liquid Large Lighted Liquid Large Lighted Liquid Large Lighted Liquid Large Lighted Liquid Crystal Display (LCD). Crystal Display (LCD). Crystal Display (LCD). Crystal Display (LCD). Crystal Display (LCD). The large numbers and letters on your LCD screen make it easy to see. In low light conditions, press the button on to ...

  • Universal Electronics 975 - page 35

    33 is 3 hours and 45 minutes. Cooling can start earlier because it takes longer for cooling systems to reach the desired temperature. T o select or deselect this feature, refer to the CONFIGURA TION section (page 24, step 1). Adjustable Adjustable Adjustable Adjustable Adjustable Temperature Display. Temperature Display. Temperature Display. Temper ...

  • Universal Electronics 975 - page 36

    34 change or clean your air filter . The factory set interv al for CHNG FL TR to be displayed is 200 hours of fan operation. This can be set anywhere from 0 to 1950 hours in 25 hour increments. A selection of 00 will cancel this feature. When CHNG FL TR is displayed, you can clear it by pressing the FIL TER b utton. This resets the timer and starts ...

  • Universal Electronics 975 - page 37

    35 a specific amount of time, press or until the tempera- ture you want is displayed. The display will indicate HOLD , and the number of hours remaining in the hold period will be indicated with the word HRS . T o adjust the length of time for the ov erride, press TIME FWD or TIME BACK . HOLD TILL will be displayed as well as the HOLD period expira ...

  • Universal Electronics 975 - page 38

    36 Daylight Savings Time Button. Daylight Savings Time Button. Daylight Savings Time Button. Daylight Savings Time Button. Daylight Savings Time Button. One button adjustment allo ws you to change your thermostat clock between Standard T ime and Daylight Savings time. Simply push the D A YLIGHT SA VINGS TIME button to adv ance the time forward one ...

  • Universal Electronics 975 - page 39

    37 allows only the or to operate for temporary temperature ov errides. It also limits the tempera- ture to the maximum heating and minimum cooling temperatures used in your program. This is especially useful in buildings where unsched- uled ev ents are common. Anyone can change the temperature, bu t only between the temperatures you set and only fo ...

  • Universal Electronics 975 - page 40

    • One of the buttons is stuck do wn or in. Check buttons, mak e sure nothing is pushing them in. • The thermostat sensor is not functioning. If using a remote sensor , check connections, wiring and power . After checking the abov e, press PROGRAM RUN to reset the display . If this does not clear the display , disconnect power and remov e the ba ...

  • Universal Electronics 975 - page 41

    PR OGRAMMING --------------- 26 Schedule Sample Programs -------------- 2 8 Personal Programs ------------- 30 Set Clock ---------------------------- 26 Day ------------------------------ 26 Program ------------------------- 26 Setpoint Range -------------------- 32 System and Thermostat Diagnosis ----------------------- 37 Thermostat Startup After ...

  • Universal Electronics 975 - page 42

    NO TES ...

  • Universal Electronics 975 - page 43

    ...

  • Universal Electronics 975 - page 44

    PART NO. 37-6438A 0223 The Emerson logo is a trademark and ser vice mark of Emerson Electric Co. White-Rodg ers is a division of Emerson Electric Co. Printed in U .S.A. ...

Manufacturer Universal Electronics Category Thermostat

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