Nordyne M3RL Series User Manual

Installation Instructions
M3RL Series 90+ Downflow Condensing Furnace
Direct Vent (Sealed Combustion) Forced Air Gas Furnaces
LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.
!
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury, death or property
damage.
!
ADVERTISSEMENT:
RISQUE D’INCENDIE OU D’EXPLOSION
Le non-respect des avertissements de sécurité
pourrait entraîner des blessures graves, la
mort ou des dommages matériels.
– Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
– WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire
department.
– Installation and service must be performed by a
qualified installer, service agency, or the gas sup-
plier.
– Ne pas entreposer ni utiliser de l’essence ni
d’autres vapeurs ou liquides inflammables dans le
voisinage de cet appareil, ni de tout autre appareil.
– QUE FAIRE S’IL Y A UNE ODEUR DE GAZ
• Ne pas tenter d’allumer aucun appareil.
• Ne toucher à aucun interrupteur électrique;
n’utiliser aucun téléphone dans le bâtiment.
• Évacuer l’immeuble immédiatement.
• Appeler immédiatement le fournisseur de gaz en
employant le téléphone d’un voisin. Respecter à
la lettre les instructions du fournisseur de gaz.
• Si personne ne répond, appeler le service des
incendies.
– L’installation et l’entretien doivent être effectués
par un installateur qualifié, un organisme de
service ou le fournisseur de gaz.
For installation in:
1. Manufactured Homes
2. Park Models and Manufactured Buildings
3. Modular Homes/Buildings
!
WARNING:
Should overheating occur, or the
gas supply fail to shut off, shut
off the manual gas valve to the
appliance before shutting off the
electrical supply.
Improper installation, adjust-
ment, alteration, service or
maintenance can cause injury
or property damage. Refer to
this manual. For assistance or
additional information consult
a qualified installer, service
agency or the gas supplier.
BW Models
BWT Models

Nordyne M3RL Series Specifications

General

Brand	Nordyne
Model	M3RL Series
Category	Furnace
Language	English

Summary

GENERAL

Furnace Specifications / Airflow Data

Detailed specifications and airflow rates for furnace models.

Owner Information

Details about the manufacturer and their history in the manufactured home industry.

INSTALLATION REQUIREMENTS

Installation Standards

Lists compliance standards for furnace installation and related equipment.

Location

Specifies requirements for furnace placement and clearances to combustible materials.

VENTING AND COMBUSTION AIR REQUIREMENTS

Vent Pipe Installation

Guidelines for routing, supporting, and pitching vent and combustion air piping.

Horizontal Venting

Instructions for horizontal installation of vent and combustion air intake terminations.

Vertical Venting

Instructions for vertical installation of vent and combustion air intake terminations.

GAS SUPPLY AND PIPING

Leak Check

Procedure for testing gas connections for leaks using a safe method.

Conversion

Details the process for converting the furnace between natural gas and LP gas.

LIGHTING AND ADJUSTMENT OF THE APPLIANCE

Manifold Pressure

Information on manifold pressure settings for natural gas and LP gas.

ELECTRICAL WIRING

Low Voltage Wiring

Instructions for connecting low voltage wiring for thermostat and other controls.

START-UP AND ADJUSTMENTS

Start-Up Procedure

Step-by-step instructions for safely starting up the furnace for the first time.

Verifying Firing Rate

How to measure and verify the furnace's gas firing rate.

Verifying and Adjusting Temperature Rise

How to measure and adjust temperature rise for optimal performance.

DESCRIPTION OF COMPONENTS

Flame Sensor

Role of the flame sensor in proving flame and ensuring safe operation.

MAINTENANCE

Combustion Air and Vent System

Checks for damage, corrosion, or blockages in the combustion air and vent system.

Air Filter

Guidance on changing or cleaning air filters for optimal furnace performance.

Condensate Drain Assembly

Ensuring condensate lines are clear, free of kinks, and connections are tight.

SYSTEM OPERATION INFORMATION

Sequence of Operation

Describes the operating sequences for heating, cooling, and fan modes.

Furnace Fails to Operate

Lists common checks and troubleshooting steps when the furnace does not operate.

Location of Major Components

Wiring Diagram

INSTALLATION/PERFORMANCE CHECK LIST