Lennox International Inc 51M37 Default Thermostat Settings, Technical Specifications

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Default Thermostat Settings

Default thermostat settings are shown in table 2 and the default program is shown in table 3.

Table 2

Default Thermostat Settings

Mode

Heat (Permanent Hold

 

Mode)

 

 

Setpoint

70°F (or 21°C)

 

 

Fan

Auto

 

 

Filter Reminder

OFF

 

 

Maintenance Reminder

OFF

 

 

Equipment Protection

Reset Back to Zero

Timers

 

Table 3

Default Program Settings

 

 

Temperature

Temperature

Programs

Time

(Heat)

(Cool)

 

 

 

 

Weekday − A

6:00am

70_F / 21°C

78_F / 26°C

 

 

 

 

Weekday − B

8:00am

62_F / 17°C

85_F / 29°C

 

 

 

 

Weekday − C

6:00pm

70_F / 21°C

78_F / 26°C

 

 

 

 

Weekday − D

10:00pm

62_F / 17°C

82_F / 28°C

 

 

 

 

Weekend − A

6:00am

70_F / 21°C

78_F / 26°C

 

 

 

 

Weekend − B

8:00am

62_F / 17°C

85_F / 29°C

 

 

 

 

Weekend − C

6:00pm

70_F / 21°C

78_F / 26°C

 

 

 

 

Weekend − D

10:00pm

62_F / 17°C

82_F / 28°C

 

 

 

 

Weekday

Monday, Tuesday, Wednesday,

 

Thursday, Friday

 

 

 

 

Weekend

Saturday, Sunday

 

 

 

 

 

Technical Specifications

Thermostat Type

Electronic programmable thermostat for heat pump, 3-stage heat/2-stage cool.

NOTE − 2 stages of heat pump heat and one stage of auxil- iary (gas or electric) backup heat are supported.

Power Supply Range

18VAC − 30VAC (24VAC nominal), 60Hz

CAUTION

24VAC is present on the terminals of the thermostat bracket. If removing the thermostat from the wall, use caution and avoid touching any of the connec- tor terminals on the wall bracket.

Also, when working with the thermostat dip switches, use a non−conductive tool and take cau- tion to avoid making any contact with the circuit board, its imprinted circuitry and its connector prongs.

Temperature Display

Display Scale: Fahrenheit or Celsius user selectable (via DIP switch; see figure 22)

Display range: 35°F (2°C) to 99°F (37°C)

Display resolution: 1°F (1°C)

Display Accuracy: +/−1°F

If the Fahrenheit/Celsius display must be changed, use a plastic, non−conductive tool to push the dip switch to the right position (see figure 22).

 

Changing Fahrenheit/Celsius Setting

1

 

2

 

3

 

4

 

5

 

6

PLUG IN (Use Care To Avoid Bending Prongs.)

 

F/C (Fahrenheit/Celsius) switch

 

shown in Celsius position

Figure 22

Temperature Measurement Range

Measurement Scale: Fahrenheit

Measurement Range: 35°F to 99°F

Measurement Resolution: 0.5°F

Measurement Accuracy: +/−1°F

Field Offset: via DIP switches to +/−3°F

Sampling Method: temperature measurements sampled every 15 seconds. Displayed temperature is the average of the last four measurements.

Temperature Setpoint Range

Setting range: 50°F (10°C) to 90°F (32°C)

Setting resolution: 1°F (1°C)

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505050M 5/1/05

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Contents 51M37 Merit Series Buttons, Backlight, Timers & Settings DAY/TIME − Setting the Day and TimeThermostat Buttons Home ScreenHeat − Using the Heat Mode FANCool − Using the Cool Mode Enabling and Disabling Cool ModeCool Mode Disabled Turn Cool ON/OFFI036 FAN PM I036 FANSettings − Filter/Maintenance Reminders FAN − Controlling the Fan OperationSettings − Balance Point Service IndicatorThermostat Reset Removing/Installing ThermostatDefault Thermostat Settings Technical SpecificationsSmart Setback Recovery via DIP switch #6 Equipment Protection TimersOver−Temperature Protection Maintenance ReminderHeating Demands Thermostat Output TableCooling Demands 51M35 Merit Series 51M35 Merit Series Thermostat505049M 5/1/05 Heat − Using the Heat Mode Cool − Using the Cool Mode Enabling and Disabling Heat ModeHeat/Cool Mode Disabled Turn Heat ON/OFFHold − Using Temperature Hold Modes 1st press Removing and Installing Thermostat I0i451M35 Terminal Designations Thermostat Outputs Gas Heat, Auto FanGas Heat, Continuous Fan Electric Heat, Auto Fan51M34 Merit Series 51M34 Merit Series Thermostat505048M 5/1/05 51M34 Series 5/2 I036 FAN OFF I0i4 51M34 Terminal Designations Heat Demand Cool Demand No Demand 51M39 Merit Series 51M39 Merit Series ThermostatI026 I030 Heat/Cool Mode Disabled Cooling Demand530 Auto − Using the Autochangeover Mode Copy a Programmed Day to An other Day Displaying Outside Temperature Check Outside TemperatureFilter Maintenance Indicators Service Indicator FlashingDefault Program Settings Time & Temp Indoor Temperature Measurement Range Outdoor 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 Default Program Settings − Time & Temp With Electric Backup no outdoor sensorTechnical Specifications 51M42 Terminal Designations 51M38 Merit Series 51M38 Merit Series ThermostatY/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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