Lennox International Inc 51M37 operation manual FAN − Controlling the Fan Operation

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FAN − Controlling the Fan Operation

Use the FAN button to select either continuous fan mode or auto fan mode.

To change from continuous to auto fan mode (or vice ver- sa), press the FAN button. Note whether a fan icon in the FAN box is present (indicating that the fan is running) or not (fan not running).

If continuous fan mode is enabled (ON displayed in FAN box − see figure 15), the fan will run continuously regard- less of whether the heating or cooling equipment is run- ning.

SETTINGS − Filter/Maintenance Reminders

The 51M42 thermostat is designed to remind you when the filter needs changing or when routine maintenance is re- quired, as (and if) defined, by you. These optional remind- ers are not enabled until you activate them. To do so, press the SETTINGS button (shown below the FAN button in fig- ure 16) once or twice for the desired reminder as shown in figure 18 and as described in table 1.

Reminder Settings Display

Using Fan ON

i0:30

72

Heat Cool

Prog Auto

Copy Day/Time

Fan Hold

OFF

For FILTER, press SETTINGS button 1 time

 

 

 

 

FILTER

 

 

 

 

For MAINTENANCE, press

 

 

MAINTENANCE

SETTINGS button 2 times

Figure 15

If auto fan mode is selected (AUTO displayed in FAN box − see figure 16), the fan will only run when the heating or cooling equipment is running.

Figure 18

The default setting for the reminders is OFF (disabled). Press Up/Down arrow buttons to select the desired re- minder intervals.

Using Fan AUTO

i0:30 72

Heat Cool

Prog Auto

Copy Day/Time

Fan Hold

Table 1

Filter and Maintenance Reminders

Buttons to

 

Available Settings and

Use

Reminder

How to Use

 

 

 

Settings

FILTER

Total fan run time expressed in

(1st press)

 

months (Off, 1, 3, 6, 12); for

 

then Arrows

 

example, if fan runs 12 hours a

to scroll

 

day, 1 month reminder displays

Figure 16

Displaying Outside Temperature

Pressing the ENTER (Outside) button at the HOME screen displays the outside temperature (see figure 17) for several seconds, then returns to room temperature.

Check Outside Temperature

88

Fan Hold

Settings Enter

(Outside)

Figure 17

selections

 

in 2 calendar months.

 

 

 

Settings

MAINTE-

Elapsed chronological time in

(2nd press)

NANCE

months (Off, 6, 12). Use this,

then Arrows

 

for example, to remind yourself

to scroll

 

when to perform routine checks

selections

 

or when to call a technician for

 

 

perodic preventive

 

 

maintenance.

Enter

 

Stores settings.

 

 

 

NOTE − The HOME screen will reappear about 15 seconds after the final arrow button press. OR, press the ENTER button at any time to store any changes and exit to the HOME screen.

After either programmed interval has elapsed, the remind- er will be displayed as shown in figure 19.

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505069M 07/05

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Contents 51M37 Merit Series Thermostat Buttons Buttons, Backlight, Timers & SettingsDAY/TIME − Setting the Day and Time Home ScreenHeat − Using the Heat Mode FANCool Mode Disabled Cool − Using the Cool ModeEnabling and Disabling Cool Mode Turn Cool ON/OFFI036 FAN PM I036 FANSettings − Filter/Maintenance Reminders FAN − Controlling the Fan OperationThermostat Reset Settings − Balance PointService Indicator Removing/Installing ThermostatDefault Thermostat Settings Technical SpecificationsOver−Temperature Protection Smart Setback Recovery via DIP switch #6Equipment Protection Timers Maintenance ReminderThermostat Output Table Cooling DemandsHeating Demands 51M35 Merit Series 51M35 Merit Series Thermostat505049M 5/1/05 Heat/Cool Mode Disabled Heat − Using the Heat Mode Cool − Using the Cool ModeEnabling and Disabling Heat Mode Turn Heat ON/OFFHold − Using Temperature Hold Modes 1st press Removing and Installing Thermostat I0i451M35 Terminal Designations Gas Heat, Continuous Fan Thermostat OutputsGas Heat, Auto 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 Heat/Cool Mode Disabled Cooling Demand 530I030 Auto − Using the Autochangeover Mode Copy a Programmed Day to An other Day Filter Maintenance Indicators Displaying Outside TemperatureCheck Outside Temperature Service Indicator FlashingDefault Program Settings Time & Temp Autochangeover Deadband Selection via DIP switch #7 Indoor Temperature Measurement RangeOutdoor Temperature Measurement Range 51M39 Terminal DesignationsThermal-mechanical switch opens W1 and W2 at 93F+/−6F Page 51M42 Merit Series 51M42 Merit Series Thermostat−Day Programmable 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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