Lennox International Inc 51M37 operation manual Mid

Page 41

Temporary (2-Hour) Hold

At any time the program is running, from the HOME screen, set a temporary 2-hour hold by pressing the Up/ Down arrow buttons until the desired setpoint is displayed; flashes (see figure 12). This overrides the pro- gram for 2 hours from the last button press, then returns to the program.

Temporary Hold Temperature Mode

 

 

Heat

Cool

 

 

i0:30

Prog

Auto

 

 

 

 

 

 

70

Copy Day/Time

 

 

 

 

 

72

68

Fan

Hold

(DOOR

 

 

 

 

 

 

OPEN)

 

 

Settings Enter

 

 

 

 

(Outside)

 

Figure 12

While in Temporary Hold, press the HOLD button once to switch to Permanent Hold (HOLD displays solid; PROG not displayed); press the HOLD button again to return to the program (PROG displays; HOLD not displayed).

PROG − Thermostat Programming

The 51M42 thermostat can be programmed to perform a set of both heating and cooling events for each day of the week. Each day can be programmed for 4 unique events per day, and each day can be different from any other day.

To Set Program Events and Temperatures

Figure 13 gives an example of how up to 7 different pro- grams can be set. 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.

NOTE − The example in figure 13 shows heat setpoints; a similar program may be set for cool setpoints.

1.Press and release the PROG button. "MO" (Monday), "AM 6:00", period "A", "COOL SETPOINT 78", and "HEAT SETPOINT 70" are displayed. "AM 6" flashes.

2.Use the Up/Down arrow buttons to select the desired hour; press the PROG button when the desired hour is reached; use the Up/Down arrow buttons again to select desired minute. The selected hour/minute is when the program will start. Press the PROG button.

3.Use the Up/Down arrow buttons to select the desired heat setpoint; press the PROG button.

4.Use the Up/Down arrow buttons to select the desired cool setpoint; press the PROG button.

NOTE − Pressing the ENTER button during the following programming steps, saves and exits to the HOME screen.

To program events and temperatures, perform the follow- ing steps.

Program Example

MONDAY PROGRAM: 72°

 

 

 

68°

A

 

C

 

 

 

 

B

D

64°

 

 

 

 

 

TUESDAY PROGRAM: 72°

 

 

68°

A

C

64°

B

D

 

WEDNESDAY PROGRAM: 72°

 

 

68°

A

C

64°

B

D

 

 

THURSDAY PROGRAM: 72°

 

 

 

68°

A

 

C

64°

 

B

D

 

 

 

 

 

FRIDAY PROGRAM: 72°

 

 

 

68°

A

 

C

64°

 

B

D

 

 

 

 

 

SATURDAY PROGRAM: 72°

 

 

 

 

A

 

 

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

68°

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

64°

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

SUNDAY PROGRAM: 72°

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

C

 

 

 

 

 

68°

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

64°

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6AM

NOON 6PM

MID

6AM

 

 

 

 

 

 

 

 

 

 

 

NIGHT

 

 

 

Figure 13

5.Repeat steps 1 − 4 for Monday, periods B, C, and D.

6.COPY A PROGRAM − If the program entered for Monday is satisfactory for other days of the week, do the following to repeat the same program for other days:

A Press the PROG button, then press the COPY button. The display clears the screen except for from MO

COPY button again to copy Monday’s program. B The display changes to

row buttons to scroll to the desired day where you want the same program as Monday. Press the COPY button.

C Repeat steps A and B for as many days as you want the same program.

Copy a Programmed Day to Another Day

 

Heat

Cool

 

Copy from MO

Prog

Auto

 

 

Copy Day/Time

 

 

Fan

Hold

(DOOR

 

 

 

 

 

 

OPEN)

 

Settings Enter

 

 

 

(Outside)

 

Figure 14

7.Repeat steps 1 − 5 to program different times and tem- peratures for days not yet programmed.

Page 5

51M42 SERIES 5/2

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Contents 51M37 Merit Series DAY/TIME − Setting the Day and Time Buttons, Backlight, Timers & SettingsThermostat Buttons Home ScreenFAN Heat − Using the Heat ModeEnabling and Disabling Cool Mode Cool − Using the Cool ModeCool Mode Disabled Turn Cool ON/OFFPM I036 FAN I036 FANFAN − Controlling the Fan Operation Settings − Filter/Maintenance RemindersService Indicator Settings − Balance PointThermostat Reset Removing/Installing ThermostatTechnical Specifications Default Thermostat SettingsEquipment Protection Timers Smart Setback Recovery via DIP switch #6Over−Temperature Protection Maintenance ReminderHeating Demands Thermostat Output TableCooling Demands 51M35 Merit Series Thermostat 51M35 Merit Series505049M 5/1/05 Enabling and Disabling Heat Mode Heat − Using the Heat Mode Cool − Using the Cool ModeHeat/Cool Mode Disabled Turn Heat ON/OFFHold − Using Temperature Hold Modes 1st press I0i4 Removing and Installing Thermostat51M35 Terminal Designations Gas Heat, Auto Fan Thermostat OutputsGas Heat, Continuous Fan Electric Heat, Auto Fan51M34 Merit Series Thermostat 51M34 Merit Series505048M 5/1/05 51M34 Series 5/2 I036 FAN OFF I0i4 51M34 Terminal Designations Heat Demand Cool Demand No Demand 51M39 Merit Series Thermostat 51M39 Merit SeriesI026 I030 Heat/Cool Mode Disabled Cooling Demand530 Auto − Using the Autochangeover Mode Copy a Programmed Day to An other Day Check Outside Temperature Displaying Outside TemperatureFilter Maintenance Indicators Service Indicator FlashingDefault Program Settings Time & Temp Outdoor Temperature Measurement Range Indoor Temperature Measurement RangeAutochangeover Deadband Selection via DIP switch #7 51M39 Terminal DesignationsThermal-mechanical switch opens W1 and W2 at 93F+/−6F Page −Day Programmable Thermostat 51M42 Merit Series51M42 Merit Series Thermostat 505069M 07/05 Large Heat Heating Demand FAN Auto MID Reminder Settings Display Using Fan on I026 With Electric Backup no outdoor sensor Default Program Settings − Time & TempTechnical Specifications 51M42 Terminal Designations 51M38 Merit Series Thermostat 51M38 Merit SeriesY/TIME button 51M38 Series 5/2 Hold − Using Temperature Hold Modes Repeat steps a and B for as many days as you Settings Thermostat Output Table 51M38 Terminal Designations

51M37 specifications

Lennox International Inc, a prominent player in the heating, ventilation, and air conditioning (HVAC) market, has made significant strides in innovation and technology in recent years. Among its notable offerings is the Lennox 51M37, a well-engineered component designed to enhance HVAC efficiency and reliability.

The 51M37 is primarily known for its advanced motor technology, incorporating ECM (Electronically Commutated Motor) design, which significantly reduces energy consumption compared to traditional motor systems. This motor type is key to Lennox's commitment to sustainability, as it not only maintains optimal performance but also minimizes the carbon footprint associated with residential and commercial heating and cooling tasks.

A standout feature of the 51M37 is its intelligent control system, which allows for more precise management of airflow and temperature. This technology can adapt to specific environmental conditions and consumption patterns, optimizing performance and providing substantial cost savings on energy bills. The integration of smart technology aligns with modern demands for energy efficiency and control, making the 51M37 a vital component in achieving higher energy ratings for HVAC systems.

In terms of compatibility, the 51M37 is engineered to work seamlessly with a variety of Lennox heating and cooling units, ensuring versatility for both new installations and retrofits. This compatibility enhances system integration, resulting in improved overall performance.

The construction of the 51M37 emphasizes durability and reliability, featuring high-quality materials that withstand the challenges of constant operation. Its robust design is perfect for diverse environments, ensuring that it functions reliably in both residential settings and commercial applications.

Another characteristic worth noting is the user-friendly installation process, allowing HVAC technicians to install the 51M37 with relative ease. This not only reduces labor costs but also ensures that the system can commence operation quickly without extensive downtime.

Overall, Lennox International's 51M37 embodies innovation, efficiency, and reliability in HVAC technology. With its advanced ECM motor, intelligent controls, and durable construction, it stands as a prime example of how modern HVAC solutions can lead to enhanced performance and energy savings. As the industry continues to evolve, products like the 51M37 will play a critical role in shaping the future of heating and cooling, aligning with sustainability goals and meeting the needs of consumers.
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