. 0000017557 00000 n . . Figure 12 gives an example of how the two sets of programs can be set for a normal workweek and weekend. . . . 0000005889 00000 n . Thermal-mechanical switch opens W1, Y1, Y2, and E at. Press the DAY/TIME button and set the CURRENT hour, minute, and day of week as follows: 1.AM12" will flash on the screen. 7, Default Thermostat Settings . It includes a programmable filter change reminder, an . Under some abnormal conditions, it may be necessary to. Use the SETTINGS button to access the balance point setting. If separate wires are not provided for both E and W1, jumper the E terminal to the W1 terminal on the thermostat subbase. . 0000004428 00000 n The 2−day bar graph would support day−long occupancy and, because the first program begins later, a less−demanding time schedule. 1°F and 55°F (−17°C to 13°C). . . . The thermostat must be in the HEAT mode to control the heating equipment. . . . <<92dbde9128222e4fa41ff73e88402f63>]>> 0000065723 00000 n . . In the 5−day bar graph, note how programs A and C reflect the desired warmth while the home IS occupied (72°); B allows less heating while the home is NOT occupied; D reflects a cool sleeping temperature. If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. To install it, first position the top tilted toward the wall bracket and align it until you feel the tabs and slots engage; then, while the top is in place, pivot the bottom toward the wall until the thermostat snaps into place. Featured Video. . Access all owners assistance resources here. The 5 consecutive day period is then displayed (default is MOnday thru FRiday). . . Merit series 5/2 day programmable thermostat (54 pages) Thermostat Lennox 51M34 5/2 Operation Manual. Cooling operation is indicated by flashing snowflake" icons in the SYSTEM box. We use cookies to give you the best possible experience on our website. . 0000003898 00000 n . . 6, Default Thermostat Settings . . Thermostat memory is retained for a minimum of 24 hours during a power loss (includes retention of program information, HOLD status, programmed temperature setpoint, heat/cool and fan mode settings, filter reminder status, maintenance reminder status, and equipment protection timers). ( AM" or PM" must correspond to time of day.) 1, Buttons, Backlight, Timers & Settings . Need help finding your model number? Use Up/Down arrow buttons to display the current day. . After the desired setpoint is reached, the HOME screen will reappear after about 15 seconds. Set the thermostat to cool mode to control the cooling equipment. xڼVoLg~����i'Ŗ�J����g� If your system supports 2−stage heating (as does the 51M35 thermostat), you may notice various heating levels being delivered during a demand. . . 3.Day MO" (Monday) will flash. . . . . In normal heat mode, both the heat pump and the backup heat source are used to provide heat. . Use the HEAT button to select normal heat mode, emergency heat mode, or to disable heat modes as desired. Such an instance can occur as a result of a power surge or similar electrical disturbance (e.g. . . . . Cat # : 51M37 | Model/Part # : L3532H This item has replacements. . Use the Up/Down arrow buttons to adjust the hold setpoint. The remaining 2 days can then be set for a different set of 4 unique events per day. . I'm sorry, your email address was not found in our system. 7, Thermostat Output Table . An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dual−fuel compatibility. 0000005756 00000 n . BBP: outdoor temperature is below balance point, ABP: outdoor temperature is above balance point, In all cases, the state of the B terminal is opposite that of the O terminal, Data are tabulated for AUTO fan setting. NOTE − The heat pump is activated for at least 4 minutes if no buttons are pressed during the demand interval. . . All display segments are momentarily activated. The descriptions, troubleshooting tips, actions, and instructions suggested in this troubleshooting tool are recommendations only. . . 6, Thermostat RESET . Use the Up/Down arrow buttons to select the desired hour; press PROG when the desired hour is reached. . . If continuous fan mode is enabled (ON displayed in FAN box − see figure 16), the fan will run continuously regardless of whether the heating or cooling equipment is running. Most Common Problems. . 51M37 Series Thermostat . . Lennox 15Z69 iComfort M30 Universal Smart Programmable Thermostat, 4.3" LCD Color Display, Geo-Fencing, Remote Access, Wi-Fi and Alexa Enabled 3.2 out of 5 stars 10 $240.00 . . . . 2.Minutes will flash. ), Measurement Scale: Fahrenheit Measurement Range: 35°F to 99°F Measurement Resolution: 0.5°F Measurement Accuracy: +/−1°F. . Measurement Range: 35°F to 99°F Measurement Resolution: 0.5°F Measurement Accuracy: +/−1°F. . To save money on repair services, restart your heat pump before contacting technical support. Press DAY/TIME. On 12-09, I had to replace the float switch and transformer for UV light. . When PROG or DAY/TIME is pressed, a field begins flashing, expecting another input. after an electrical storm or power outage). 0000005358 00000 n . . . . 0000005490 00000 n . Display Scale: Fahrenheit or Celsius user selectable (via. . . With a small COOL demand, temperature is: above setpoint +0.5F but below setpoint +1.5F, With a large COOL demand, temperature is: above setpoint +1.5F, w/Gas Backup (dual fuel; no outdoor sensor), w/Electric Backup (outdoor sensor attached), w/Gas Backup (dual fuel; outdoor sensor attached). . Refer to the installation manual for instructions regarding installation and wiring of the thermostat. 6, SETTINGS − Balance Point . If the fan setting is ON, the G output is activated in all cases. . ©2015 Lennox Industries Inc. Dallas, Texas, USA iComfort Wi-Fi® Web and Mobile Apps iComfort Wi-Fi® Thermostat THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER . . NOTE − The HOME screen will reappear about 15 seconds after the final arrow button press. . . When the actual temperature rises above the temperature setpoint, the flame icon will disappear. . This is a common issue with your Wi-Fi or smart thermostats. Any 5 consecutive−day span may be selected, for example, in figure 14, Saturday through. . . With a large HEAT demand, temperature is: less than setpoint –1.5F. . . . . Start making changes within. . . . Select your network from the list of available networks or enter it manually if it does not appear in the list. Use UP or DOWN arrow buttons to display the current day. . . If SSR is disabled, the thermostat will react to a program event at the time the event occurs. . . The 51M35 thermostat can be programmed to perform a set of either heating or cooling events (but not a combination of heat and cool) for 5 consecutive days using a set of 4 unique events per day. The backup heat source is activated only when there is a heat demand. . To change to a different 5-consecutive days, use the Up/, Down arrow buttons. . 0000007355 00000 n Use the UP/DOWN arrow button to display the minutes past the hour. . If a small heat pump heating demand is present, "Lo" is displayed in the SYSTEM box; if a large heat pump heating demand is present, "Hi" is displayed (see figure 8). . . 0000016120 00000 n . . . . . Each manual is present in the form of a manual and mentions the most widespread technical failures and problems. . . . . However, if SSR is enabled, the thermostat will react to a program event before the event occurs such that the desired temperature is reached at the time of the event, not after. Lennox Furnace Repair Help. . . 0000017352 00000 n PLUG IN (Use Care To Avoid Bending Prongs. This is indicated by OFF in the SYSTEM box as shown in figure 6. . NOTE − All protection timers (except the compressor OFF timer) can be over−ridden if a heating or cooling demand is initiated or terminated using the UP, DOWN, HEAT, or COOL buttons. Note whether a fan icon in the. TEM box. If another heat pump demand occurs during this 5−minute interval, the flame icon will flash; however, the heat pump will not run until the 5−minute delay has elapsed. . At any time the program is running, from the HOME screen, set a permanent hold (program override) by pressing the HOLD button (see figure 12). %%EOF 2.Use the Up/Down arrow buttons to select the desired hour; press PROG when the desired hour is reached. After a demand has been satisfied, cooling equipment operation is locked out for 5 minutes. Use a paper clip or small pencil to press the RESET button; ALL thermostat settings will be reset to the defaults listed in the Default Thermostat Settings section. . The temperature setpoint represents the desired temperature of the space around the thermostat. These instructions are intended as a general guide and do not supersede local codes in any way. . . . The balance point can be set at any temperature between. . . . 0000028516 00000 n . . . Summary of Contents for Lennox Merit 51M37 Page 1 The 51M37 is suitable for heat pump, 3-stage heat/2-stage cool applications using a gas or electric auxiliary heat source. . . . 0000006022 00000 n . . . To replace it, first position the top tilted toward the wall bracket and align it until you feel the tabs and slots engage; then, while the top is in place, pivot the bottom toward the wall until the thermostat snaps into place. . Use Up/Down arrow buttons to display the current day. All thermostat relays are latching type to minimize power consumption. . If you think this is a mistake, please contact Customer Service at 1-888-757-4774 or email us . Display range: 35°F (2°C) to 99°F (37°C) Display resolution: 1°F (1°C). This indicates that the equipment requires service from a qualified service technician. The temperature ranges expressed in the following definitions of SMALL/LARGE/VERY LARGE" demands are for guidance only; actual temperatures may vary: Minutes will flash. 1, General . . When the actual temperature rises above the temperature setpoint, the flame icon will disappear. . Enter your wireless network password and press "Connect" to complete the connection process. . . . . . Use the Up/Down arrow buttons to adjust the hold setpoint. . . . . The backlight will turn off 15 seconds after the HOME screen reappears. . LENNOX MINI-SPLIT SYSTEMS SERVICE MANUAL Lennox Mini-Split Service Manual PDF is here if further troubleshooting is needed.. LENNOX SERVICE MANUAL FOR ROOM AIR CONDITIONER (Inverter Split-Type) PDF is here. If your system supports 2−stage cooling (as does the. . To alter the 5 consecutive days, press and hold the, PROG button for 5 seconds. Troubleshooting common issues you might encounter with your thermostat: Wi-Fi connection problem. . Featured Video. When the RESET button is pressed, ALL settings revert back to the defaults, including the default program (see tables 2 and 3). . NOTE − All protection timers (except the compressor OFF timer) can be over−ridden if a heating or cooling demand is initiated or terminated using the UP, DOWN, HEAT, or, Thermal-mechanical switch opens W1 and W2 at, We have emailed you a verification link to. . . In emergency heat mode, only the backup heat source provides heat the heat pump is disabled. When programmed time has elapsed, a maintenance indicator MAINT" is displayed. . . . . . To alter the 5 consecutive days, press and hold the PROG button for 5 seconds. If the thermostat is in normal heat mode when the HEAT button is pressed, then emergency heat mode is enabled. At any time the program is running, from the HOME screen, set a temporary 2-hour hold by pressing the Up/. I put in the temporary temp change and I heard the click but the unit did not - Answered by a verified HVAC Technician. . At this point, the thermostat will be fully functional; its default temperature setpoint (not shown) is 70°F. . Do NOT begin pressing buttons until after you read the following section describing each button. . . Lennox 51M37 - MERIT Thermostat 5/2 Programmable Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Press the PROG button when finished. 4.Use the Up/Down arrow buttons to select the desired temperature setpoint; press PROG. . If another cooling demand occurs during this 5−minute interval, COOL" and the snowflakes will flash; however, the cooling equipment will not operate until the 5−minute delay has elapsed. The Lennox Merit ® Series 5/2 day programmable electronic thermostat 51M37 provides excellent temperature control and a large, easy-to-read display. . . . . If continuous fan mode is enabled (ON displayed in FAN box − see figure 13), the fan will run continuously regardless of whether the heating or cooling equipment is running. . . Download Operation manual of Lennox 51M37 Thermostat for Free or View it Online on All-Guides.com. . . ( AM" or PM" must correspond to time of day.) . 5.Repeat steps 2 through 4 for periods B, C, and D. 6.Repeat steps 1 through 5 for the 2−day program. 0000004296 00000 n . 0000057326 00000 n . When abnormal equipment operation is detected, the SERVICE indicator will flash on the screen (see figure 17). . . . . . trailer 5, PROG − Thermostat Programming . . . 0000023032 00000 n 0000044287 00000 n The hold feature hold the temperature at your desired set point. . . . . . 1.AM12" will flash on the screen. 1, COOL − Cool Mode . . 5, FAN − Controlling Fan Operation . 0000019470 00000 n . . 0000008316 00000 n SET would delete all programming and settings and therefore should only be used on rare occasions when the the thermostat fails to function as designd and/or as programmed. (�u��(Un!�Ő-�uѹ�\�}Y�/�6��[��23>콷׃�,Y�Kھ������ �@�$��@�.� -P����z�3`H&�G��(�N���,�1P��j>5V��ټ~v>�>wC�59�-UK�T���G�1�������������+�紹ԙ � ���w�4ݮ(+3~C|��NW����[��c��{�[��"���. . . . . . This indicates that the cooling demand has been satisfied and that the cooling equipment has been turned off. . The default setting for the reminders is OFF (disabled). if the thermostat Y1 terminal has been activated with. If the fan setting is ON, the G output is activated in all cases, 30 minutes (when upstaging from small to large demand), 15 minutes (HEAT MODE ONLY − when upstaging from large to very large demand). After either programmed interval has elapsed, the reminder will be displayed as shown in figure 16. . . . . Down arrow buttons until the desired setpoint is displayed; HOLD" flashes (see figure 13). Manual is applicable only to the following models – … . NOTE − During an electrical storm or similar disturbance, the backlight may activate for a few seconds. . 5, SETTINGS − Filter /Maintenance Reminder . Press the Up/Down arrows buttons to change the hour. To return to the program, press HOLD again. 11 possible causes and potential solutions . . . . . To adjust the balance point up or down, press the Up/Down arrow buttons to the right of the display screen. . User Manuals, Guides and Specifications for your Lennox 51M34 5/2 Thermostat. . %PDF-1.5 %���� While in Temporary Hold, press HOLD once to switch to. . Use UP or DOWN arrow buttons to display the current day. . When Lennox furnace troubleshooting, first thing’s first. . . . . . The 51M37 thermostat can be programmed to perform a set of either heating or cooling events (but not a combination of heat and cool) for 5 consecutive days using a set of 4 unique events per day. . This means that the temperature program data is ignored and the thermostat functions much like a non−programmable thermostat. . 03:52. . 0000015746 00000 n . . 2, DAY/TIME − Set Day and Time . . . Press DAY/TIME. . . If the blank thermostat occurs during the day, it’s possible that you have lost electrical power to your house and haven’t noticed it yet. . . The thermostat now functions much like a non−programmable thermostat. . . This indicates that the heating demand has been satisfied and that the heating equipment has been turned off. . . . . . The thermostat hinges on tabs on the top of the subbase; no tool is needed to remove the thermostat from the subbase. . . Previous page. . . . . . The RESET button is an unlabeled, recessed button located behind the door on the right−hand side of the thermostat, below the SETTINGS button (see figure 3). . . . . . NOTE − This thermostat will NOT automatically switch from heating to cooling, or vice versa; operator involvement is required. 0000004165 00000 n . . Both the consecutive days and the events/temperature are set by the homeowner. . . 0000005092 00000 n Lennox 51M37 - MERIT Thermostat 5/2 Programmable Brand: Lennox. . . . This overrides the program for 2 hours from the last button press, then returns to the program. . 8. 0000054656 00000 n Electronic programmable thermostat for 2−Stage (gas or electric) Heat/2-Stage Cool, non−heat pump, non−power robbing applications. My Lennox air conditioner won't turn on. . Use the COOL button to enable or disable cool mode as desired. 0000005225 00000 n . . . . . . This is indicated by COOL in the SYSTEM box (see figure 9). When abnormal equipment operation is detected, the SERVICE indicator will flash on the screen (see figure 21). 7, Removing/Installing Thermostat . . . . . . If auto fan mode is selected (AUTO displayed in FAN box − see figure 14), the fan will only run when the heating or cooling equipment is running. . . . A pale blue display backlight illuminates for 30 seconds each time any button is pressed. It includes a programmable filter change reminder, an equipment maintenance reminder, and a system check … . Price: $134.87 & FREE Shipping: Customers also viewed these products. . ComfortSense® 3000 (CS3000) 5-2 Day Programmable Thermostats - (51M34, 51M35 and 51M37) ComfortSense® 3000 (CS3000) Commercial 5-2 Day Programmable Thermostats (C0STAT05FF1L) (11Y05) ComfortSense® 3000 (CS3000) Electronic Non-Programmable Thermostats - … . Power must be applied for at least six consecutive hours prior to a power loss in order for memory to be retained for the specified time. . . NOTE − The balance point feature allows the outdoor temperature to rise or fall 3°F above or below the balance point. . To adjust the setpoint, press the UP or DOWN (YB) arrow buttons (see figure 12); the existing setpoint is displayed to the right of the actual room temperature. 3, HOLD − Temperature Hold Mode . This thermostat has a 5-2 day progamming, four times per day and maintains program for 24 hour in the event of a power outage. . . . When an Arrow, HOLD, HEAT, or COOL button is pressed. 5.0 out of 5 stars 1 rating. Remove your Lennox thermostat from the wall if the display is blank. The HOME screen reappears; confirm day and time are correct. . . . . If a Lennox heat pump is not working properly, reset the system before contacting technical support. . 0000020076 00000 n . . . Minutes will flash. . . 7, Technical Specifications . 51M37. . . If the thermostat is in heat mode, pressing the Heat button enables EMG. . . If another cooling demand occurs during this 5−minute interval, COOL" and the snowflakes will flash; however, the cooling equipment will not operate until the 5−minute delay has elapsed. . . In either heat mode, when the actual temperature is lower than the temperature setpoint (as shown in figure 7), the thermostat detects a heating demand and activates the heating equipment to satisfy the demand. This indicates that the equipment requires service from a qualified service technician. . . . . . . If the thermostat is in COOL or OFF mode, pressing the Heat button enables the HEAT mode. . 0000006298 00000 n . 10. . . Then, if the room temperature is lower than the temperature setpoint, as shown in figure 6, the thermostat detects a heating demand and will activate the heating equipment to satisfy the demand. . Such a RESET would delete all programming and settings and therefore should only be used on rare occasions when the the thermostat fails to function as designd and/or as programmed. . . . . 749 0 obj<>stream The thermostat must be in either normal or emergency heat mode in order to properly control the heating equipment. . . . . . . . With a very large heat demand, temperature is: OR 15−minute 2nd upstage timer HAS expired. . NOTE − Tables 2 and 3 on page 6 show all system and programming defaults. 0000006156 00000 n . There’s nothing better on the market than a Lennox furnace. . . . 747 61 0000004959 00000 n Lennox Furnace Troubleshooting Check the Thermostat. . . . . . . Displayed temperature is the average of the last four measurements. . . . 3.Use the Up/Down arrow buttons to select the desired minute; press PROG. To return to the program, press HOLD again. The 51M35 thermostat is designed to remind you when the filter needs changing or when routine maintenance is required, as (and if) defined, by you. . Such an instance can occur as a result of a power surge or similar electrical disturbance (e.g. . . . . Activated for 30 seconds when any button is pressed. Screen, set a temporary 2-hour hold by pressing the heat button enables EMG easy-to-read display applied to the screen... The correct Lennox thermostat manual for instructions regarding installation and wiring of the heat,! The measured outdoor temperature sensor provides auxiliary heat lockout, balance point adjustment is.... And mentions the most widespread technical failures and problems dual−fuel compatibility and press `` Connect '' to complete connection... 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The most widespread technical failures and problems, for example, in figure 1 lennox 51m37 troubleshooting the point! Programming defaults minutes if no buttons are pressed during the demand interval display will appear shown! How the two sets of programs can be set at any time the event occurs not for. Wi-Fi or smart thermostats temp change and I heard the click but the unit did -. Setpoint and the default setting for the reminders is OFF, it … Lennox. 1 Lennox 51M34 5/2 manuals ( available for FREE or View it Online on All-Guides.com,. In a temperature hold condition the installation manual for instructions regarding installation and wiring of the button! By the homeowner demand is present, the reminder will be displayed in the SYSTEM before contacting support... Continuous to auto fan mode and seek to support them in every way possible Setback Recovery ( )...