Nordyne M3RL installation instructions Closet or Alcove, Ducted Return AIR

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REDUCER

FELT-SEAL(1)

C

 

SPACERS

(1)FINGER TAB DUCT CONNECTOR ONLY

(2)SCREW DOWN DUCT CONNECTOR ONLY

( )OPENING TO DUCT

(1)WITH PLATE (C) REMOVED OPENING BECOMES 13-1/4” x 13-1/4”

(2)WITH PLATE (C) REMOVED OPENING BECOMES

13" X 13". WITH REDUCER IT IS 13" X 10-1/8".

XSEE TABLE 5

Figure 5.

WALL

SIDE

ALT. FUEL

LINE HOLES

C

L

FUEL LINE

HOLE

REAR

WALL

 

10"

C

L

FLOOR

OPENING

23 -1/4"

Figure 6. Closet or Alcove

i.Gas piping is not run in or through the return duct system.

j.Test the negative pressure in the closet with the air-circulating fan operating at high speed and the closet closed. The negative pressure is to be no more negative than minus 0.05 inch water column.

k.For floor return systems, the manufactured home manufacturer shall affix a prominent marking on or near the appliance where it can be easily read when the closet door is open. The marking shall read:

!CAUTION:

HAZARD OF ASPHYXIATION: Do not cover or restrict return air opening.

l.Air conditioning systems may require more duct register and open louver area to ob-

tain necessary airflow. Use NORDYNE’s certiduct program to determine proper duct size for A/C.

DUCTED RETURN AIR

M3 furnaces with model numbers ending in AW or BW are factory configured for the return air to flow through the front louvered door. The return air may also be attached to either side or the top of the furnace cabinet using a field installed kit. Refer to Table 12 for the NORDYNE ducted return kit P/N number. The location and size of the side and top return air connections are shown in Figure 1. The filter size for the side return air is 20” x 20” x 1”. For top return the filter size is 24” x 16” x 1”.

M3 furnaces with model numbers ending in BWT are factory configured for the return air to enter the top of the furnace.

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Contents Installation Instructions Page L 060 a a W Table of ContentsFurnace Specifications/Airflow Data Shipping WeightGeneral Top ViewGeneral Description Owner InformationManufacturer WARRANTY, OWNER’S Responsibilities Installation StandardsLocation Circulating AIR SupplyMinimum Clearances Return AIR Provisions Duct ConnectorsDucted Return AIR Closet or AlcoveDuct Connector Selection Duct InstallationAIR Distribution Systems Installing Screw Down Duct CON- Nector Installing Platinum Series 14 Round Duct ConnectorCUT Duct Opening Finger Tabbed only Screw Down Platinum SeriesAlternate Attachment Methods Installing Finger Tabbed Duct CON- NectorsInstall Furnace Venting and Combustion AIR RequirementsGeneral Furnace Must not be Common Vented with Other Appliances Venting RequirementsVent Termination Clearances for Direct Vent Furnaces Vent TableVent Pipe Material Vent Pipe InstallationHorizontal Venting Downflow FurnaceHorizontal Venting Drainage of Condensate from Furnace Alternate Horizontal Vent InstallationGAS Supply and Piping Furnace with Condensate Drain Trap AssemblyLeak Check ConversionHigh Altitude Derate To Turn Off Fuel Supply to the ApplianceTo Remove the Burner Orifices To Remove the Burner AssemblyTo Convert the Unit to the Alternate Gas Approximate Orifice Size for Natural and LP GasesConvertible Pressure Regulator Cap Lighting and Adjustment of the ApplianceLine Voltage Wiring Electrical WiringType of Fuel Manifold Pressure Completing the ConversionElectrical Data Low Voltage WiringSTART-UP and Adjustments Start-Up ProcedureVentilation Shut Down Procedure Sequence of OperationVerifying Firing Rate Description of Components Verifying Operation of the Supply Air Limit SwitchGas Flow Rate Verifying Burner OperationAccessory Kits MaintenanceCombustion Air and Vent System Air FilterSystem Operation Information Condensate Drain AssemblyLubrication Blower CompartmentFurnace Fails to Operate Cooling ModeM3 Downflow Furnace Downflow Furnace Wiring Diagram Page Fuel Type INSTALLATION/PERFORMANCE Check List¢7082197¤

M3RL specifications

The Nordyne M3RL is a high-efficiency gas furnace designed for residential heating applications, characterized by its robust performance and advanced technologies. It is part of Nordyne's distinguished lineup, which emphasizes reliability and comfort in home heating systems. The M3RL model is particularly notable for its focus on energy efficiency, making it an attractive option for homeowners looking to reduce their energy expenses while maintaining optimal heating levels.

One of the standout features of the Nordyne M3RL is its high Annual Fuel Utilization Efficiency (AFUE) rating, which often exceeds 80%. This efficient design ensures that more of the fuel consumed is converted into usable heat for the home. By employing a variable-speed blower, the M3RL enhances comfort by allowing for more precise control over air circulation, contributing to better temperature consistency throughout the living space.

The M3RL utilizes advanced multi-stage heating technology, allowing the system to operate at different capacities depending on the heating demand. This means it can run at lower settings during milder weather, which not only saves energy but also reduces wear and tear on the equipment, extending its lifespan. The furnace also includes a reliable ignition system that ensures quick and safe starts, eliminating the inefficiencies associated with older pilot light systems.

Another important characteristic of the Nordyne M3RL is its acoustical insulation, which minimizes operational noise. The quiet operation is particularly valued in residential settings, where noise pollution can be disruptive. Additionally, the furnace features a compact design, making it easy to install in a variety of spaces, including tight basements or utility rooms.

The M3RL model is also equipped with a smart control system that interfaces seamlessly with modern thermostats, offering homeowners the ability to program their heating schedules and optimize energy usage. This integration with smart home technology positions the M3RL not just as a heating solution, but as a component of a more comprehensive home energy management system.

In conclusion, the Nordyne M3RL gas furnace represents a blend of efficiency, advanced technology, and user-friendly features. Its high AFUE rating, multi-stage heating capability, quiet operation, and smart technology integration make it a reliable choice for homeowners aiming to enhance their comfort while minimizing energy costs. This furnace is a testament to Nordyne's commitment to innovation in the HVAC industry.
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