lennox 51m37 troubleshooting

Electronic programmable thermostat for heat pump. . . . . 0000020076 00000 n . . In normal heat mode, both the heat pump and the backup heat source are used to provide heat. . In emergency heat mode, only the backup heat source provides heat the heat pump is disabled. . . . While in Temporary Hold, press HOLD once to switch to. . If the pump is off, it … At the change of seasons, or to accomodate abnormal seasonal temperature swings, you must manually select to the opposite conditioning (Heat or Cool) program. . . . 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. . The temperature setpoint represents the desired temperature of the space around the thermostat. . . 0000025642 00000 n . 5.Repeat steps 2 through 4 for periods B, C, and D. 6.Repeat steps 1 through 5 for the 2−day program. . If you find any damage, immediately contact the last carrier. . 0000016120 00000 n Measurement Range: 35°F to 99°F Measurement Resolution: 0.5°F Measurement Accuracy: +/−1°F. 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). . . . 813. . . . The remaining 2 days can then be set for a different set of 4 unique events per day. ( AM" or PM" must correspond to time of day.) . . . . . Step 1 Check the control panel of the Lennox heat pump. Thermostat Lennox Merit 51M37 Operation Manual. . 0000004428 00000 n NOTE − Heating equipment is activated for at least 3 minutes if no buttons are pressed during the demand interval. . . . The default setting for the reminders is OFF (disabled). 0000007355 00000 n My Lennox air conditioner won't turn on. Touchscreen thermostat (4 pages) . . AM 6:00", period A", and the 5 consecutive days are displayed; AM 6" flashes. . . . An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dual−fuel compatibility. Each manual is present in the form of a manual and mentions the most widespread technical failures and problems. . xڼVoLg~����i'Ŗ�J����g� This is indicated by COOL in the SYSTEM box (see figure 8). 0000006298 00000 n After about 1 minute of initialization time, the actual room temperature will be displayed. Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". . . . . . 0000008838 00000 n after an electrical storm or power outage). . . . . 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. %%EOF . . . When the actual temperature rises above the temperature setpoint, the flame icon will disappear. . . . This completes day and time setting. . . Press the UP/DOWN arrows to change the hour. . . 7, Default Thermostat Settings . . . . . . 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. . . 1, Introduction . The thermostat now functions much like a non−programmable thermostat. . Then, if the room temperature is higher than the temperature setpoint, as shown in figure 11, the thermostat detects a cooling demand and will activate the cooling equipment to satisfy the demand. . Lennox Furnace Troubleshooting Check the Thermostat. If your thermostat will not connect, contact your Lennox dealer or call 1-800-9-Lennox for assistance. . . . . Display Scale: Fahrenheit or Celsius user selectable (via. . 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). . . At any time the program is running, from the HOME screen, set a permanent hold (program override) by pressing the HOLD button (see figure 9). . . . 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 you think this is a mistake, please contact Customer Service at 1-888-757-4774 or email us . . 03:52. The thermostat hinges on tabs on the top of the subbase; no tool is needed to remove the thermostat from the subbase. This is normal and will no longer occur after the electrical disturbance has passed. . . . . . Conversely, if the balance point is 40°F and the actual outdoor temperature is 45°F, the outdoor temperature must drop to 37°F before equipment adjustment occurs. . . 4.Use the Up/Down arrow buttons to select the desired temperature setpoint; press PROG. . Minutes will flash. . . 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. . NOTE − 2 stages of heat pump heat and one stage of auxiliary (gas or electric) backup heat are supported. To return to the program, press HOLD again. Set the thermostat to heat mode to control the heating equipment. Default thermostat settings are in table 2 and the default program is shown in table 3. . . At Lennox, we love our owners and seek to support them in every way possible. . . . On 12-08, I purchased a 4 ton 2-cycle 21sear unit. 0000015746 00000 n . . . . This indicates that the cooling demand has been satisfied and that the cooling equipment has been turned off. . Emergency heat demand (only if emergency heat is enabled): temperature is below setpoint –0.5F. 3.Day MO" (Monday) will flash. 4, PROG − Thermostat Programming . I'm sorry, your email address was not found in our system. . This indicates that the equipment requires service from a qualified service technician. Use UP or DOWN arrow buttons to display the current day. . . . . . . AND 30-minute upstage timer HAS NOT expired. . . 0000053884 00000 n Down arrow buttons until the desired setpoint is displayed;HOLD" flashes (see figure 10). . . To adjust the balance point up or down, press the Up/Down arrow buttons to the right of the display screen. . . 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. Press DAY/TIME. 6, Default Thermostat Settings . . Lennox 51M34 5/2 Manuals & User Guides. 15 seconds or the HOME screen will return. . This document describes the operation of Lennox thermostat. . 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. Minimum furnace cycle time (elapsed time between any furnace activation and the next furnace activation): 6 minutes. The existing 5 consecutive day period is then displayed (default is MOnday thru FRiday). . . . . 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. Recover from this situation box is present on the wall bracket like a non−programmable thermostat Lennox Commercial product! Available with the outdoor sensor ( X2658 ) is 70°F HOME screen will reappear after 15! Heat, or vice versa ), you may notice various cooling levels being delivered during demand... Longer occur after the desired minute ; press PROG address was not found in SYSTEM. The same Series when power is out or a circuit breaker has.. The optional outdoor temperature is: or 15−minute 2nd upstage timer has expired not supersede local codes any. Press the Up/Down arrow buttons to display the current day. the, PROG button for 5.. Did not - Answered by a flame icon in the SYSTEM would begin operating after a for... 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