Nortek MG1 Series User Manual

MG1 Series
Downflow, Direct Vent (Sealed Combustion)
Forced Air Gas Furnaces
INSTALLATION INSTRUCTIONS
WARNING / AVERTISSEMENT
FIRE OR EXPLOSION HAZARD
• Failure to follow safety warnings exactly could
result in serious injury, death or property damage.
• Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
• Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
RISQUE D’INCENDIE OU D’EXPLOSION
• Le non-respect des avertissements de sécurité pourrait
entraîner des blessures graves ou des dommages
matériels importants.
• L’installation et l’entretien doivent être effectués par
un installateur qualifié, un organisme de service ou le
fournisseur de gaz.
• N’entreposez pas ni n’utilisez de l’essence ni d’autres
vapeurs ou liquides inflammables dans le voisinage de
cet appareil, ni de tout autre appareil.
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
neighbors phone. Follow the gas suppliers
instructions.
• If you cannot reach your gas supplier, call the fire
department.
QUE FAIRE S’IL Y A UNE ODEUR DE GAZ
• N’essayez d’allumer aucun appareil.
• Ne touchez à aucun interrupteur électrique; n’utilisez
aucun téléphone dans le bâtiment.
• Évacuez l’immeuble immédiatement.
• Appelez immédiatement le fournisseur de gaz en employant
le téléphone d’un voisin. Respectez les instructions du
fournisseur de gaz.
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A
SAFE PLACE FOR FUTURE REFERENCE.
CAUTION
HUD Manufactured Home Construction and Safety
Standards (3280.714) prohibit the use of noncertified
air conditioning or heat pump equipment with
this furnace. It is strongly recommended that
manufactured housing air conditioning components
from Nortek Global HVAC be selected to provide
a matched system specifically designed to meet
these requirements.
The cutting, splicing or modifying of any internal
electrical wiring may void product warranties and
create a hazardous condition. Failure to comply
with these standards could also provide inadequate
heating or cooling performance and cause structural
damage to a manufactured home.
Please contact your local distributor for help. A
directory of Nortek Global HVAC factory authorized
servicers is located in the furnace homeowner
packet.
Reference: HUD Manufactured Home Construction
and Safety Standards 3280.714.
For installation in:
• Manufactured Homes
• Recreational Vehicles, Park Models, &
Manufactured Buildings
• Modular Homes / Buildings

Nortek MG1 Series Specifications

General

Configuration	Upflow/Horizontal
Ignition System	Direct Spark Ignition
AFUE Rating	Up to 96%
Fuel Type	Natural Gas
Efficiency	Up to 96%
Heating Capacity	40, 000 - 120, 000 BTU/h
Ignition Type	Direct Spark
Warranty	10-Year Limited Warranty on Parts

Summary

MG1 Series Installation Instructions

Product Overview and Safety Warnings

Introduces MG1 Series furnaces, their applications, and critical safety warnings for installation and operation.

Important Safety Information

Understanding Safety Markings and Hazards

Explains safety symbols, warnings for water immersion, and cautions for construction site operation.

Requirements & Codes

Installation Standards and Code Compliance

Details national and local codes for general installation, combustion air, ventilation, electrical, and gas piping.

General Information and Unit Location

Clearances, Applications, and Placement Guidelines

Covers minimum clearances, furnace applications, and guidelines for proper unit location.

Circulating Air Requirements

Return and Supply Air System Guidelines

Specifies requirements for return air openings and supply air duct system design for optimal performance.

Furnace Installation Compliance

Adherence to Industry Standards

Emphasizes the necessity of following applicable national and industry standards during installation.

Duct Connector Installation

Standard and Round Duct Connectors

Provides detailed instructions for installing both standard and round duct connectors, including cut-out dimensions.

Furnace and Roof Jack Installation

Furnace Placement and Roof Jack Selection

Guides on furnace placement within enclosures and selecting the correct roof jack based on ceiling cavity depth.

Venting System Installation Procedures

Roof Jack and Combustion Air Connections

Details installation of roof jacks on various roof types and connecting the combustion air pipe.

Venting System and Electrical Information

Transit-Mode Venting and Line Voltage Wiring

Covers transit-mode venting system installation/removal and safety for line voltage wiring.

Connecting Power Supply Wires

Furnace Wiring Diagram Reference

Directs users to wiring diagrams for UTEC/NORDYNE and Emerson control boards for proper connections.

Low Voltage Wiring and Grounding

Thermostat Connections and Grounding

Explains thermostat wiring, anticipator settings, and critical electrical grounding requirements.

Fuel Supply & Piping Installation

Gas Piping Safety and Code Compliance

Details safety warnings, codes, and practices for gas piping installation, including prohibited locations.

Fuel Supply and Gas Valve Details

Gas Valve Operation and Pressure Checks

Covers gas valve practices, pressure specifications for natural and LP gas, and leak check procedures.

High Altitude and Gas Analysis

Altitude Deration and Flue Gas Sampling

Explains high altitude deration for natural gas and the procedure for flue gas sampling.

Propane Gas Conversion and Pressure Measurement

LP Gas Conversion and Pressure Testing

Provides steps for propane conversion and instructions for measuring supply and manifold gas pressures.

Startup & Adjustments

Pre-Startup Checks and Direct Ignition Operation

Covers essential pre-startup safety checks and the operating sequence for direct ignition furnaces.

Input Rate and Temperature Rise Verification

Measuring and Adjusting Furnace Performance

Details how to verify input rate, temperature rise, and gas pressure for optimal furnace performance.

Operating Sequence and Troubleshooting

Direct Ignition Sequence and Fault Codes

Describes the operating sequence for direct ignition furnaces and provides troubleshooting for control board fault codes.

Burner and Blower Troubleshooting

Flame, Ignition, and Cycling Issues

Addresses common burner and blower problems like no flame, ignitor issues, lockout, and short cycling.

Furnace Controls, Maintenance, and Accessories

Control Functions, Service, and Options

Explains furnace controls, required maintenance, and considerations for optional accessories like air conditioning.

Technical Data Tables

Gas Flow Rates and Pipe Capacities

Presents tables for gas flow rates based on meter readings and gas pipe capacities by size and length.

Altitude Deration Data

Natural Gas and Propane Altitude Charts

Provides tables showing heating values and deration adjustments for natural and propane gas at various altitudes.

Wiring Diagrams

Nordyne/UTEC Control Board Wiring

Details the specific wiring diagram for the Nordyne/UTEC control board, including component connections.

Wiring Diagrams

Emerson Control Board Wiring and Settings

Illustrates the wiring diagram for the Emerson control board, including motor speed settings and dipswitch configurations.

Airflow and Temperature Rise Data

Heating Airflow Performance

Presents data on heating airflow (CFM) and temperature rise for different motor speeds and static pressures.

Cooling Airflow Performance Data

Cooling Airflow and Static Pressure Tables

Provides tables detailing cooling airflow (CFM) at various external static pressures and motor speeds.

Installation Checklist

Electrical, Gas, and Venting System Checks

A comprehensive checklist covering electrical, gas system, and combustion air/venting system requirements for proper installation.