Thermostat/Humidifier Control Digital 7 Day Programmable Comfort-Set® 90 Series TM P R E M I U M 1F97-391 Installation and Operating Instructions Retain for Future Use
Easy, Menu-Driven Set-Up and Programming 1 2 3 4 5 6 7 8 9 10 11 12 Premium options to customize the thermostat to fit your application.
INTRODUCTION Thank you for purchasing your new Comfort-Set 90 thermostat and humidifier control. WhiteRodgers has been producing energy saving controls for over 60 years. We have been designing and producing the ComfortSet family of electronic programmable thermostats since 1982. Comfort-Set 90 is the third generation of the electronic programmable family.
INTRODUCTION THE THERMOST AT B UTT ONS THERMOSTA BUTT UTTONS 7 Used to adjust the time backward, or to select the previous menu item. 14 Used to set/reset the filter and humidity maintenance timer. 8 Used to adjust the time forward, or to select the next menu item. 15 Sets the system mode (HEATing, OFF, COOLing, or AUTOmatic changeover). 2 (Red arrow) Raises temperature setting (99°F or 37°C maximum) 9 Used with TIME FWD /TIME BACK to set the current day and with HOLD to enter VACATION mode.
LAR GE LIGHTED (L CD) DISPLA Y LARGE (LCD) DISPLAY menu, the menu item name is shown, one PR GM MODE word at a time (PR PRGM MODE, EMR EMR, COOL FAN DELA OFF OFF, etc.). The thermostat display alternately shows the current time and the current temperature on the left side. The display also shows the temperature you have programmed or set on the right side of your screen. 19 CHECK B ATTER Y appears when the BA TTERY “AA” alkaline batteries are weak and Y appears should be replaced.
INSTALLATION AND CONFIGURATION This White-Rodgers Automatic Setback Digital Thermostat uses microcomputer technology to provide precise time, temperature and humidity control. This thermostat offers the flexibility to design heating and cooling programs that fit personal needs. This thermostat is adaptable to most 24 Volt residential forced air, hydronic (hot water or steam), electric heat systems.
PRECAUTIONS ! ! CAUTION WARNING To pr event electrical shoc k and/ pre shock or equipment dama ge, discondamag nect electric po wer to system a pow att main fuse or cir cuit br eak er bo x circuit break eaker box until installa tion is complete complete.. installation Do not shor minals on shortt out ter terminals e or primar y contr ol to gas vvalv alv alve primary control test.
INST ALLA TION AND CONFIGURA TION INSTALLA ALLATION CONFIGURATION ATTENTION! REMOVE OLD THERMOSTAT ATTACH BASE TO WALL This product does not contain mercury. However, 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 nonabsorbent gloves, take up the spilled mercury with sand or other absorbent material and place into a container which can be sealed.
CONFIGURING AND PROGRAMMING 4 Before the power is turned on, the thermostat must be configured to operate properly with the system. See CONFIGURATION on page 16 in this manual.
WIRING DIA GRAMS DIAGRAMS All wiring diagrams are for typical systems only. Refer to equipment manufacturers' instructions for specific system wiring information. H HM1 6 Y G W HM2 RC RH 1 3 2 W RH HM1 W RH RC G E Y HM2 6 L J I K 1 From heating system 2 From 24 VAC transformer 3 Red jumper wire (provided) For humidifier wiring see pages 14-15. See page 9 for letter identification.
LETTER IDENTIFICATION FOR WIRING DIAGRAMS A Humidifier System H Jumper Wire L Hot Side B Zone Valve I TRANSFORMER M Neutral Side C Cooling System J 24 VAC Side N HEATING TRANSFORMER D Fan Relay K 120 VAC Side O COOLING TRANSFORMER E Heating System P Jumper Wire (field-installed) 9 Installation/Configuration
H HM1 6 Y G W HM2 RC RH 1 C D E 3 2 W L RH HM1 W RH RC G J 1 From heating system 2 From 24 VAC transformer 3 Red jumper wire (provided) 4 From fan relay 5 From cool system For humidifier wiring see pages 14-15. See page 9 for letter identification. I 4 G Y 5 Y HM2 6 K M NOTE: Ensure that RED RH/RC jumper wire (provided with thermostat) is connected between thermostat's RH and RC terminals for proper operation with this system.
H 6 HM1 Y G W HM2 RC RH 1 3 2 4 6 4 5 B W 1 HM1 W RH RC G 2 J 1 2 6 RH L From heating system From 24 VAC transformer (through zone valve) 3 Red jumper wire (provided) 4 From zone valve system For humidifier wiring see pages 14-15. See page 9 for letter identification. I HM2 6 K M NOTE: Thermostat must have batteries installed.
HM1 6 Y G HM2 W RC RH 1 L C D E 3 2 W J I K RH C R HM1 W RH RC G G Y 4 Y HM2 6 M L J 1 2 3 4 5 From heating system From 24 VAC heating transformer From 24 VAC cooling transformer From fan relay From cooling system O K M Figure 6 – Typical wiring diagram for heat/cool, two-transformer system For humidifier wiring see pages 14-15. See page 9 for letter identification.
HM1 6 Y G C D W HM2 RH RC 2 1 L R J I K HM1 W RH RC G M 1 From 24 VAC cooling transformer 2 From fan relay 3 From cooling system For humidifier wiring see pages 14-15. See page 9 for letter identification.
1 HM1 6 Y G W HM2 RC RH HM HM1 W RH RC G A Y HM2 6 L J K I M NOTE: Two terminal choices (HM1 or HM2) are provided for humidifier control. When the humidity setting is higher than the room humidity: HM1 turns off the humidifier when the call for heat ends. HM2 powers the humidifier an additional 30 seconds after the call for heat ends to provide slightly more humidity output. 1 From humidity system See page 9 for letter identification.
1 6 HM1 Y G W HM2 RC RH HM HM1 W RH RC G Y HM2 6 L Relay 90-290Q or equivalent J K I M A K 1 From humidity system See page 9 for letter identification.
CONFIGURA TION CONFIGURATION 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 conditioning compressor and fan. This is the correct configuration for any system that DOES NOT require the thermostat to energize the fan on a call for heat.
1 2 W914 W922 1 Clip for remote sense 2 3-pin connector 3 Clip for electric heat Figure 10 – Jumper locations 17 Installation/Configuration 3
CONFIGURA TION MENU CONFIGURATION The configuration menu allows you to set thermostat operating characteristics to your system or personal requirements. To enter the menu, press TIME FWD and TIME BACK once at the same time. Press TIME FWD to advance through the menu options. Press arrow keys to change options. Either the installer or the operator may change shaded options. We recommend that other options be set by the installer.
CONFIGURA TION MENU (cont’ d) CONFIGURATION (cont’d) Adjusts temperature display higher or lower See page 32 8 TIME FWD 0˚F (0) 5 LO to 5 HI 9 TIME FWD (˚F) ˚C 10 TIME FWD BEEP (ON) OFF Turns beeper ON or OFF 11 TIME FWD REMT SEN (OFF) ON Selects remote sensor OFF or ON See page 21 12 TIME FWD PART LOCK (OFF) ON Selects partial keypad lockout OFF or ON See page 34 13 TIME FWD LOCK (OFF) ON Selects total keypad lockout OFF or ON See page 34 14 TIME FWD RH 20 LO to 20 HI
CONFIGURA TION CONFIGURATION ADJUSTABLE ANTICIPATION This option allows the cycle times in heating and cooling to be increased or decreased. The factory set values can be adjusted higher for longer cycles or lower for shorter cycles. The adjustment range for HEATING is from 2 to 40. The factory preset is 5. The adjustment range for COOLING is from 9 to 40. The factory preset is 12. The recommended initial setting for hydronic (hot water or steam) systems is 35.
CONFIGURA TION CONFIGURATION compressor and the fan to come on at slightly different times, which allows full power to the compressor on start up. The fan off delay allows the fan to continue running after the compressor has shut off. This distributes the cooling that would otherwise stay trapped in the air conditioning coils through the ducts. Ideally the timing would be set so the fan shuts off just as the cool air is exhausted.
CHECK THERMOST AT OPERA TION THERMOSTA OPERATION away as 300 feet. The thermostat will use the temperature in the remote location as its room temperature display. This is an excellent feature if the thermostat is in a poor location for sensing temperature or the thermostat is in a separate room to prevent tampering. NOTE The remote sense feature will not work if the system does not provide 24V to the thermostat (example: heating-only system or 3-wire zone valves).
CHECK THERMOST AT OPERA TION (cont’ d.) THERMOSTA OPERATION (cont’d.) HUMIDIFIER OPERATION CHECK (cont’d.) raise the humidity setpoint (45% maximum) above the room humidity level. The humidifier should operate. If the humidity in the room is above 45%, press to adjust the setting to 45% (the maximum setting) and hold the up arrow in for 5 seconds. The display will read ON and the humidifier will operate. This test will last for one heat cycle.
PROGRAMMING MANU AL OPERA TION MANUAL OPERATION (Bypassing the Pr o g ram) Pro Your Comfort-Set 90 thermostat can be used to control temperature manually (without programming). For manual operation, press SYSTEM T or COOL to select HEA HEAT COOL, then press PROGRAM HOLD . Use or to set the temperature as desired. PR OGRAMMED OPERA TION PROGRAMMED OPERATION Planning Your Pr o g ram Pro The sample schedule (pages 26 & 27) shows the factory installed programs for heating and cooling.
9. If you program Monday the first time you press PROGRAM VIEW it will be copied to the rest of the week. To program the other days of the week press ADV. /DAY until you reach the day you wish to change and follow Steps 10, 11 & 12. You can also copy the program from one day to another. To copy, press HOLD /COPY. The display will show COPY, and all the other days of week will be flashing.
7 Day Sample HEAT Program Schedule (Shows factory programming) 1 1 2 3 5 6 5 6 5 6 5 6 MON 6:00 AM 70°F (21°C) 8:00 AM 62°F (16°C) 5:00 PM 70°F (21°C) 10:00 PM 62°F (16°C) TUE 6:00 AM 70°F (21°C) 8:00 AM 62°F (16°C) 5:00 PM 70°F (21°C) 10:00 PM 62°F (16°C) WED 6:00 AM 70°F (21°C) 8:00 AM 62°F (16°C) 5:00 PM 70°F (21°C) 10:00 PM 62°F (16°C) THU 6:00 AM 70°F (21°C) 8:00 AM 62°F (16°C) 5:00 PM 70°F (21°C) 10:00 PM 62°F (16°C) FRI 6:00 AM 70°F (21°C) 8:00 AM 6
7 Day Sample COOL Program Schedule (Shows factory programming) 1 5 1 2 6 5 3 6 5 6 5 6 MON 6:00 AM 78°F (25°C) 8:00 AM 85°F (29°C) 5:00 PM 78°F (25°C) 10:00 PM 82°F (27°C) TUE 6:00 AM 78°F (25°C) 8:00 AM 85°F (29°C) 5:00 PM 78°F (25°C) 10:00 PM 82°F (27°C) WED 6:00 AM 78°F (25°C) 8:00 AM 85°F (29°C) 5:00 PM 78°F (25°C) 10:00 PM 82°F (27°C) THU 6:00 AM 78°F (25°C) 8:00 AM 85°F (29°C) 5:00 PM 78°F (25°C) 10:00 PM 82°F (27°C) FRI 6:00 AM 78°F (25°C) 8:00 AM 85°F
7 Day Personal HEAT Program Schedule 1 5 2 6 5 3 6 5 MON TUE WED THU FRI SAT SUN 1 Morning (MOR) 2 Day (DAY) 3 Evening (EVE) 4 Night (NHT) 5 Start Time 6 Temperature 28 4 6 5 6
7 Day Personal COOL Program Schedule 1 5 2 6 5 3 6 5 MON TUE WED THU FRI SAT SUN 1 Morning (MOR) 2 Day (DAY) 3 Evening (EVE) 4 Night (NHT) 5 Start Time 6 Temperature 29 Programming 4 6 5 6
FEATURES Thermostat Features: Pushbutton Backlight --------------- 31 Factory Preprogramming ----------- 31 Arm Chair Programming ----------- 31 Temporary Program Override ------ 31 Indefinite Program Hold (Bypassing the Program) -------- 31 Selectable Energy Management Recovery (EMR) ----------------- 32 Automatic Heat/Cool Changeover ------------------------ 32 Adjustable Temperature Display -- 32 Programmable Fan Control -------- 33 Programmable Vacation Time Temp ------------------------ 33 Daylight Sa
Pushb utton Bac klight Pushbutton Backlight The large numbers and letters on your LCD screen make it easy to see. In low light conditions, press the button on top of the thermostat and the display will light up for three seconds. For ten minutes after pressing the light button, pressing any other button will light the display for ten seconds. The display light uses power from the 3 “AA” alkaline batteries installed. Excessive use of the display light will reduce battery life.
Selecta ble Ener gy Selectab Energ Mana gement R eco ver y (EMR) Manag Reco ecov ery EMR causes the thermostat to start operating the system early in order to make the building temperature reach your program setpoint at the time you specify. In heating, the thermostat will start 5 minutes early for every 1°F difference between the room temperature and the next programmed temperature. In cooling, the thermostat uses 15 minutes per °F.
Pr o g ramma b le F an Contr ol Pro ammab Fan Control This feature allows you to have your fan operate continuously through one or more programmed time periods. This is useful if you want constant air circulation in your location during a specific time period. If you do not use this feature, the fan will cycle normally with the heating and cooling system. Pr o g ramma b le Vaca tion Time/ Pro ammab acation Temper a tur e Oper a tion.
display in low light conditions, and allow for armchair programming. CHECK BATTERY will be displayed when the batteries are low. To assure optimum performance, change batteries once a year or when CHECK BATTERY is displayed. When changing batteries, always replace all three batteries with new “AA” alkaline batteries (for optimum performance, we recommend Energizer® batteries). If the batteries must be changed frequently, it may indicate a problem with the system.
Compressor Shor t-Cy c le Pr otection. Short-Cy t-Cyc Protection. Your thermostat can be configured to protect your system against premature compressor failure by “locking out” the compressor. This ensures that the compressor will stay off for at least five minutes on each cycle. When the thermostat is in compressor lock-out, the word COOL will flash. During this period, the compressor will not be energized. See installation and configuration, page 18, step 6.
repeat this sequence three times. If the temperature still does not rise, it will continue to call for heat. This normally indicates the heating system is not working correctly. You may wish to consult your furnace manufacturer or service person. The display will indicate CHECK STAT if one of the following occurs. • One of the buttons is stuck down or in. Check buttons, make sure nothing is pushing them in. • The thermostat sensor is not functioning.
Humidifier Control and Monitoring When humidity key is pressed in the run mode the actual humidity will be displayed on the left side of the display. HUMD is displayed above the actual humidity. The humidity set point is displayed on the right side of the display. or key may be pressed to modify the humidity set point. Maximum displayed humidity is 80% RH and minimum displayed humidity is 10% RH. If the heating system is operating and there is a demand for humidity, then the humidifier will operate.
FAQs 1F97-391 1. My thermostat is reading in Celsius. How do I change it to Fahrenheit? Press PROGRAM RUN to make certain the thermostat is in the run program mode, then press TIME FWD and TIME BACK at the same time to enter the configuration menu. WN arrow to select °F, Press TIME FWD until you get to °C then press the UP or DO DOWN press PROGRAM RUN to return to normal operation. 2. The display shows the Y.
FAQs 1F97-391 5. My furnace (air conditioning) cycles too fast (slow). Is there an adjustment? The 1F97-391 has a feature called Adjustable Heating and Cooling Cycle times (also called Anticipation) that allows you to increase or decrease the cycle times in heating and cooling. This is useful if you think your cycle times are too long or too short. The higher the number you select, the longer the cycle. The lower the number you select, the shorter the cycle.
FAQs 1F97-391 7. Do I have to program a stop time for each program period? There is no need to select a time to stop a programming period. Starting a new programming period will stop the previous program period. 8. My display light does not work. Can it be fixed or replaced? The display light in the 1F97-391 is not a replaceable item. The display light uses power from the batteries. If batteries are good, a replacement thermostat would be indicated. 9.
FAQs 1F97-391 11. How can I get an extra copy of the Operating Manual for my thermostat? Visit our website at www.white-rodgers.com for operating manuals. 12. What do I do if my system is not working properly and I need service? Contact a Local Heating & Cooling service person or visit our website at www.white-rodgers.com to consult our “Where to Buy” Service/Dealer locator. 13.
TROUBLESHOOTING 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. 1. Pilot light not lit. 2. Thermostat not set to Heat. Re-light pilot. STEM button until Heat is displayed Press the SY SYSTEM and raise temperature above room temperature.
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION No Heat (cont.) 5. Heating system requires service or thermostat requires replacement. STEM button until Heat is Diagnostic: Press the SY SYSTEM displayed 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.
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION 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 is 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 in previous Corrective Actions.
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION Blank Display and/or Keypad Not Responding 1. 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 ACK Reset Operation by pressing FAN AN, TIME B BA CK, and WN arrow at the same time.
INDEX Adjustable Humidity Display ------ 36 Adjustable Temperature Display -- 32 Air Filter Change-out Indicator --- 35 Arm Chair Programming ----------- 31 Automatic Changeover ------------ 32 Automatic Humidity Reduction, Programmable --------------------- 37 Battery Back-Up --------------------- 33 Compressor Short-Cycle Protection -------------------------- 35 CONFIGURATION ------------------ 4 Configuration Menu Chart --------- 18 Copy ----------------------------------- 25 Daylight Savings Time Button
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