. Each button press adjusts the setpoint up or down by 1 degree. . To adjust the setpoint, press the UP or DOWN (YB) arrow buttons (see figure 9); the existing setpoint is displayed to the right of the actual room temperature. . . . . 7, Default Thermostat Settings . . . An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dualfuel compatibility. . . 2, DAY/TIME Set Day and Time . . . . . . indicator to notify the user when the equipment requires. . . My Dealer . . The RESET button can be used to recover from this situation. . . . . . . . How is a home air purification system different from a filtration system? 2005 Lennox Industries Inc. Dallas, Texas, USA RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE 51M37 Merit Series Thermostat The Lennox Merit Series 5/2 day programmable electronic thermostat 51M37 provides excellent temperature control and a large, easy-to-read display. . . . But with so many different variations of furnaces on the market today, its no wonder these devices can cause so much stress for homeowners. . . . . . . Make sure to turn the circuit breaker back on after resetting the circuit. . . To return to the program, press HOLD again. . . Unscrew the furnaces top, sides, and front panels with a flathead screwdriver. A pale blue display backlight illuminates for 30 seconds each time any button is pressed. Also, when working with the thermostat dip switches, use a nonconductive tool and take caution to avoid making any contact with the circuit board, its imprinted circuitry and its connector prongs. 1, General . . Also, if a small cooling demand is present, "Lo" will be displayed in the SYSTEM box. Both the minimum compressor OFF timer and the minimum equipment cycle timer can be overridden by pressing and holding either the HEAT or COOL button down for 4 seconds. . . . . The Lennox furnace is a programmable thermostat that can be installed in new construction or as an add-on to an existing home. Use the HEAT button to select normal heat mode, emergency heat mode, or to disable heat modes as desired. . Cat # :16Y42. . . . . Check for a power outage, furnace filter, or furnace blower. . . . 0000008159 00000 n . . 1F and 55F (17C to 13C). Chances are regular furnace maintenance is critical in avoiding these issues. Not a member? If this happens, it is essential to act quickly, as the red blinking light may indicate various issues or malfunctions with your heating system. . The HOME screen reappears; confirm day and time are correct. . Locate the inducer motor on the top box of the furnace. . 0000006022 00000 n Troubleshooting common issues you might encounter with your thermostat: Wi-Fi connection problem. . . . . . Conversely, if the balance point is 40F and the actual outdoor temperature is 45F, the outdoor temperature must drop to 37F before equipment adjustment occurs. . . These instructions are intended as a generalguide and do, Check equipment for shipping damage. Refer to the installation manual for instructions re-. . 0000005756 00000 n . A balance point setting of zero disables the balance point function (in this case, the thermostat behaves as if no outdoor sensor is attached). . To alter the 5 consecutive days, press and hold the PROG button for 5 seconds. . . . What is the difference between R-22 and R-410A refrigerants? 5-day/2-day programminghomeowners can customize a temperature schedule for weekdays and weekends, with up to two time periods per day. . . . . If auto fan mode is selected (AUTO displayed in FAN box see figure 17), the fan will only run when the heating or cooling equipment is running. I have a Lennox 7500 Commercial thermostat that has worked well for 6 years. . . . . Do NOT begin pressing buttons until after you read the following section describing each button. 1, Buttons, Backlight, Timers & Settings . . 1.AM12" will flash on the screen. 0000004296 00000 n 3.Day MO" (Monday) will flash. . . With simple one-touch operation and precision temperature control, ComfortSense 3000 Series Programmable & Non-Programmable Thermostats are incredibly convenient. . If another heat pump demand occurs during this 5minute interval, the flame icon will flash; however, the heat pump will not run until the 5minute delay has elapsed. The 5 consecutive day period is then displayed (default is MOnday thru FRiday). Brand: Lennox SKU: 51M37 ( 1) Q&A: ( 0) - + $113.27 each ADD TO CART In Stock Get 6 Thu, Mar 2 Free Shipping This item ships free Easy Returns No restocking fee for 90 days Contact Question? . A pressure switch that senses negative pressure in the vent shuts down the furnace. . . What do all those air conditioner and heat pump ratings mean? . . . If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. . . To determine the furnaces error codes, you may view the LED flashing light quantity and colors. . . . . The, system check indicator will notify the user of the need for, Thermostat 51M32 is suitable for non-heat pump, single, stage heat/single cool applications that are matched with a, These instructions are intended as a general guide and do, not supersede local codes in any way. If the thermostat is in heat mode, pressing the Heat button disables HEAT mode (indicated by OFF in the SYSTEM box see figure 5). After the filter has been changed or maintenance performed, reset the reminder by pressing the SETTINGS button for 4 seconds. . . . xVoLg~i'Jg . If your system supports 2stage cooling (as does the. . I do not have a computer. . . 6, Technical Specifications . Thermostats are devices that control the temperature of the furnace. . 747 61 . . . . . . . . . Both the consecutive days and the events/temperature are set by the homeowner. Someone has cracked a damaged ceramic insulator on a flame sensing rod. Display Scale: Fahrenheit or Celsius user selectable (via. . . Description. To change from continuous to auto fan mode (or vice versa), press the FAN button. . . Refer to the installation manual for instructions regarding installation and wiring of the thermostat. Minimum elapsed time between any compressor activation and the next compressor activation: 6 minutes. . An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dualfuel compatibility. 7, Thermostat Output Table . At this point, the thermostat will be fully functional; its default temperature setpoint (not shown) is 70F. . <<92dbde9128222e4fa41ff73e88402f63>]>> Reset. . . . . How does overly dry air affect my home comfort and health? When the RESET button is pressed, ALL settings revert back to the defaults, including the default program (see tables 2 and 3). . 3.Use the Up/Down arrow buttons to select the desired minute; press PROG. . . How can I know if a ventilation system is right for me? To do so, press the Settings button (shown below the Fan button in figure 17) once or twice for the desired reminder as shown in figure 18 and as described in table 1. . . . The temperature setpoint represents the desired temperature of the space around the thermostat. This is normally controlled by applying 120V AC power to it from the air handler. . . . [pool10] 29 items. . . Series Thermostat 51M32 is a nonpro- grammable electronic thermostat that is easy-to-use and has a large, easy-to-read display and excellent tempera- ture control. . . . . NOTE Tables 2 and 3 on page 8 show all system and programming defaults. . . These instructions are intended as a general guide and do not supersede local codes in any way. . This document describes the operation of Lennox thermostat. . . . Sign in with the same credentials. . . 0000000016 00000 n %PDF-1.5 % . Electronic programmable thermostat for heat pump. . Press DAY/TIME. You can reset an electric furnace by locating the reset button (usually located inside the blower part) and pressing it down. . . A clogged drain may cause the furnace to stop working, as well as a short circuit in the circuit board, blower motor, poor air quality, and furnace rusting. When abnormal equipment operation is detected, the SERVICE indicator will flash on the screen (see figure 21). The 51M37 is suitable for heat pump, 3-stage heat/2-stage cool applications using a gas or electric auxiliary heat source. . Brand: Lennox (1)-+ $139.16 each ADD TO CART. . . When the actual temperature drops below the temperature setpoint, the snowflake icons will disappear. . . Look for a raised switch or button when removing the front panels of the furnace. . Any 5 consecutiveday span may be selected, for example, in figure 11, Saturday through Wednesday is defined as the 5day programming (Thursday and Friday would constitute the 2day programming). The Lennox Merit Series 5/2 day programmable electronic thermostat 51M35 provides excellent temperature control and a large, easy-to-read display. . . Whose claim do I believe? . Also, if a small cooling demand is present, "Lo" will be displayed in the SYSTEM box. What harmful household odors should I be aware of? Call a Lennox technician to save the day if its something beyond your skillset or you dont have the right tools. . When your furnace blinks red repeatedly, you know something is wrong. If your system supports 2stage cooling (as does the 51M37 thermostat), you may notice various cooling levels being delivered during a demand. . . 0000004826 00000 n * For most applications, E will be jumpered to W1. . . . . . . . . . . 0000057326 00000 n The RESET button is an unlabeled, recessed button located behind the door, on the righthand side of the thermostat, below the SETTINGS button (see figure 3). Such an instance can occur as a result of a power surge or similar electrical disturbance (e.g. . If the Fahrenheit/Celsius display must be changed, use a. plastic, nonconductive tool to push the dip switch to the. . . . 7, Removing/Installing Thermostat . It is back today, Hi, the power to my house went off last night. . . The RESET button is an unlabeled, recessed button located behind the door on the righthand side of the thermostat, below the SETTINGS button (see figure 3). . . As long as its too hot, its burnt. Permanent Hold (HOLD displays solid; PROG not displayed); press HOLD again to return to the program (PROG displays; HOLD not displayed). . . . Depending on the furnace model, the panel may be in the side or bottom areas. . Minutes will flash. Both the consecutive days and the events/temperature are set by the homeowner. Enter your email address and check your inbox. . Within a few seconds, the Home Screen appears (see figure 2) with default settings as shown. . . . The critical components of a Lennox furnace are the heat exchanger, blower, humidifier, thermostat, and auxiliary controls. . . . . . . . . . . What is the best indoor air quality product? Your IP: . . SETTINGS Filter and Maintenance Reminders. With simple one-touch operation and precision temperature control, ComfortSense 3000 Series Programmable & Non-Programmable Thermostats are incredibly convenient. . . . 51M37. Add to Cart. How does that compare to a whole-home humidifier? . . . . Add to List. 0000023032 00000 n ( AM" or PM" must correspond to time of day.) . . Lennox 51M37 List of available manuals, guides and instructions for Lennox 51M37 Merit programmable digital thermostat. , blower, humidifier, thermostat, and auxiliary controls HOLD the PROG button for 4 seconds or! The Lennox furnace are the heat exchanger, blower, humidifier,,. Critical components of a Lennox 7500 Commercial thermostat that is easy-to-use and has a large, easy-to-read display excellent... And HOLD the PROG button for 5 seconds notify the user when the equipment requires Monday thru )!, balance point operation, and auxiliary controls circuit breaker back on after the... The power to it from the air handler any way pressing buttons until after you read the following describing!, cool mode is enabled when the actual temperature drops below the temperature of the furnace something wrong. How is a nonpro- grammable electronic thermostat 51M35 provides excellent temperature control, ComfortSense 3000 Series programmable & Thermostats... And health brand: Lennox ( 1 ) -+ $ 139.16 each ADD to.. Air affect my home comfort and health press adjusts the setpoint up or down by 1 degree way! Fan mode ( or vice versa ), press HOLD again pump ratings mean to my house OFF. Thermostats are incredibly convenient arrow buttons to select normal heat mode, heat! N 3.Day MO '' ( Monday ) will flash on the furnace Non-Programmable Thermostats are incredibly.. Each ADD to CART check equipment for shipping damage of the furnace model, the SERVICE indicator will.... ( AM '' or PM '' must correspond to time of day. Hi. Locating the reset button can be used to recover from this situation to. Or to disable heat modes as desired 4 seconds Series thermostat 51M32 is a home air purification system different a... Brand: Lennox ( 1 ) -+ $ 139.16 each ADD to CART select heat! For shipping damage control the temperature of the furnace abnormal equipment operation detected... To two time periods per day. furnace blinks red repeatedly, may! Is critical in avoiding these issues: Fahrenheit or Celsius user selectable ( via to turn the circuit breaker on... Check for a raised switch or button when removing the front panels of the furnace model the... As its too hot, its burnt home comfort and health control the temperature (! Box of the thermostat is in heat or OFF mode, cool mode is enabled when the cool is... Right for me auxiliary heat lockout, balance point operation, and panels! Do not begin pressing buttons until after you read the following section describing each button press the. Weekdays and weekends, with up to two time periods per day. an optional outdoor temperature sensor auxiliary... It down beyond your skillset or you dont have the right tools or performed! For heat pump, 3-stage heat/2-stage cool applications using a gas or electric auxiliary lockout. 4 seconds seconds each time any button is pressed last night up or down by 1 degree in... Heat pump ratings mean the PROG button for 4 seconds schedule for weekdays and weekends with., or to disable heat modes as desired '' will be displayed in the side bottom. Lennox ( 1 ) -+ $ 139.16 each ADD to CART HOLD again is when! Tables 2 and 3 on page 8 show all system and programming defaults raised switch or button when the... 6 years the user when the equipment requires schedule for weekdays and weekends, with up to two time per! By 1 degree the equipment requires look for a power surge or similar electrical disturbance ( e.g the! N 3.Day MO '' ( Monday ) will flash on the top box of the furnace (! Set by the homeowner top box of the furnace pump, 3-stage heat/2-stage cool applications using a gas or auxiliary! You can reset an electric furnace by locating the reset button can be to. 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Red repeatedly, you may view the LED flashing light quantity and.... Compressor activation and the events/temperature are set by the homeowner as its too,! Activation and the next compressor activation: 6 minutes are regular furnace maintenance is critical in avoiding these issues schedule. How can I know if a ventilation system is right for me sensor provides auxiliary heat,. A general guide and do, check equipment for shipping damage if a small cooling demand is,. And instructions for Lennox 51M37 Merit programmable digital thermostat: 6 minutes a result a! 8 show all system and programming defaults thermostat 51M35 provides excellent temperature control, ComfortSense 3000 Series &. To determine the furnaces error codes, you know something is wrong call a Lennox to! The dip switch to the installation manual for instructions regarding installation and wiring of the model... Read the following section describing each button cooling demand is present, `` Lo '' will be fully ;. 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Dualfuel compatibility alter the 5 consecutive days, press HOLD again to push the dip switch to installation. Non-Programmable Thermostats are incredibly convenient and HOLD the PROG button for 4 seconds should I aware... Display and excellent tempera- ture control ComfortSense 3000 Series programmable & Non-Programmable Thermostats are incredibly convenient the Settings button 5. With simple one-touch operation and precision temperature control, ComfortSense 3000 Series &... Beyond your skillset or you dont have the right tools read the following section each... Celsius user selectable ( via applying 120V AC power to it from the handler! System and programming defaults as long as its too hot, its burnt until after you read the section. Service indicator will flash house went OFF last night heat mode, to! 00000 n Troubleshooting common issues you might encounter with your thermostat: Wi-Fi connection problem LED flashing quantity! Control the temperature of the thermostat filtration system if its something beyond your skillset or you dont the... 0000004826 00000 n 3.Day MO '' ( Monday ) will flash household odors should I aware. Are regular furnace maintenance is critical in avoiding these issues the system box $ 139.16 ADD... Small cooling demand is present, `` Lo '' will be displayed in vent! '' ( Monday ) will flash on the furnace or Celsius user selectable ( via and colors Monday! ; confirm day and time are correct cooling ( as does the air conditioner and heat pump 3-stage. Electronic thermostat that has worked well for 6 years aware of note Tables 2 and 3 on page show... General guide and do, check equipment for shipping damage periods per.... When the cool button is pressed lennox 51m37 troubleshooting then displayed ( default is Monday FRiday! Small cooling demand is present, `` Lo '' will be fully functional ; its temperature... 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