TABLE OF CONTENTS

General

4

Unit Dimensions

4

Shipping Weights

4

Furnace Specification

4

Air Flow Data

4

Owner's Information

5

Installation Requirements

6

Location

7

Clearance

7

Circulating Air Supply

7

Return Air Provisions

8

Air Distribution Systems

9

Duct Connector Selection

10

Duct Installation

10

Venting and Combustion

 

Air Requirements

13

Venting Requirements

14

Vent Table

15

Vent Pipe Material

16

Vent Pipe Length and Diameter

16

Vent Pipe Installation

16

Pipe Routing & Support

16

Location of Outdoor Termination

16

Horizontal Venting

18

Vertical Venting

18

Vent Freezing Protection

19

Concentric Vent Termination

19

Drainage of Condensate

 

From Furnace

19

Gas Supply and Piping

20

Leak Check

21

High Altitude Derate

21

Pressure Switch

21

Conversion

21

Lighting and Adjustment

 

of the Appliance

23

Electrical Wiring

24

Line Voltage Wiring

24

Low Voltage Wiring

26

Ventilation

26

Start-up and Adjustment

26

Start-Up Procedure

26

Shut Down Procedure

27

Verifying and Adjusting Firing Rate ...

27

Temperature Rise

27

Verifying and Adjusting

 

Verifying Burner Operation

28

Verifying Operation of the

 

Supply Air Limit Switch

28

Description of Components

29

Furnace Accessories

29

Maintenance

29

Combustion Air and Vent System ....

29

Air Filter(s)

29

Lubrication

30

Condensate Drain Assembly

30

Blower Compartment

30

Heat Exchanger and Burner

 

Maintenance

30

System Operation Information

30

Sequence of Operation

30

Furnace Fails to Operate

31

Location of Major Components

32

Wiring Diagram

33

Installation/Performance

 

Checklist

35

M 3 R L - 060 A - A W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Return Air Configuration

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blank - Front

Application

 

 

 

 

 

 

 

 

 

 

 

 

 

T - Top

 

 

 

 

 

 

 

 

 

 

 

Door Color

M-Manufactured Home

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W - White

 

 

 

 

 

 

 

 

 

 

 

 

 

Furnace Series

 

 

 

 

 

 

 

 

 

 

 

G - Gray

 

 

 

 

 

 

 

 

 

 

Cabinet Dimensions

Comfort Model

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A - 56" x 19-3/4" x 23-3/4”

 

 

 

 

 

 

 

RL - Condensing Downflow

 

 

 

 

 

 

B - w/Coil Cavity,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

76" x 19-3/4" x 23-3/4"

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrical Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating Capacity

 

A - 1PH, 60 Hz, 120 VAC

 

 

 

 

 

Input, BTUH (000’)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 1. Model Identification

 

 

 

3

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Nordyne M3RL installation instructions L 060 a a W, Table of Contents

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.