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Nordyne
M3RL installation instructions
Models:
M3RL
1
34
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Specs
Install
Downflow Furnace Wiring Diagram
Warranty
Maintenance
Electrical Wiring
To Remove the Burner Assembly
Start-UpProcedure
Lighting And Adjustment Of The Appliance
Duct Connectors
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Contents
M3RL Series 90+ Downflow Condensing Furnace
Installation Instructions
ADVERTISSEMENT
FIRE OR EXPLOSION HAZARD
Page
Installation/Performance
TABLE OF CONTENTS
Lighting and Adjustment
Return Air Configuration
Figure 1. Furnace Dimensions
Furnace Specifications / Airflow Data
GENERAL
Table 2. Shipping Weight
GENERAL
NOTICE TO INSTALLER
OWNER INFORMATION
General Description
INSTALLATION STANDARDS
MANUFACTURER WARRANTY, OWNER’S RESPONSIBILITIES
GENERAL
LOCATION
CIRCULATING AIR SUPPLY
Table 4. Minimum Clearances
Top View
RETURN AIR PROVISIONS
Table 5. Duct Connectors
Figure 2. Non-Platinum Supply Duct System
Figure 6. Closet or Alcove
DUCTED RETURN AIR
AIR DISTRIBUTION SYSTEMS
DUCT CONNECTOR SELECTION
DUCT INSTALLATION
REAR WALL OF CLOSET OR ALCOVE
Figure 9. Duct Connector
INSTALLING SCREW DOWN DUCT CON- NECTOR
Duct Connectors
CUT DUCT OPENING FINGER TABBED ONLY
Figure 11. Narrow Duct Installation
INSTALLING FINGER TABBED DUCT CON- NECTORS
Figure 10. Installation of Duct Connector
Figure 12. Alternate Installation
INSTALL FURNACE
VENTING AND COMBUSTION AIR REQUIREMENTS
General
1.Seal any unused openings in the venting system
VENTING REQUIREMENTS
CARBON MONOXIDE POISONING HAZARD
6.Close fireplace dampers
Table 6. Vent Table
Pipe Routing and Support
Vent Pipe Installation
Vent Pipe Material
Location of Outdoor Terminations
Figure 16. Horizontal Venting
Downflow Furnace
Figure 17. Vertical Venting
Vertical Venting
Horizontal Venting
Concentric Vent Termination
Figure 19. Exhaust and Combustion Air
DRAINAGE OF CONDENSATE FROM FURNACE
Figure 18. Alternate Horizontal Vent Installation
Pipe Clearances
GAS SUPPLY AND PIPING
General
Figure 22. Typical Gas Piping
CONVERSION
DO NOT REMOVE OR DEFACE THE ORIGINAL RATING PLATE
Leak Check
To Remove the Burner Orifices
To Remove the Burner Assembly
To Convert the Unit to the Alternate Gas
Valve
LIGHTING AND ADJUSTMENT OF THE APPLIANCE
Honeywell
Reinstalling the Burner Assembly
Manifold Pressure
ELECTRICAL WIRING
Line Voltage Wiring
Type of Fuel
Verify proper operation after servicing
Four-wireHeating/Cooling Applications
START-UPAND ADJUSTMENTS
VENTILATION
Start-UpProcedure
SEQUENCE OF OPERATION Shut Down Procedure
Verifying Firing Rate
Table 11. Gas Flow Rate
DESCRIPTION OF COMPONENTS
Verifying Burner Operation
Table 12. Accessory Kits
MAINTENANCE
FURNACE ACCESSORY KITS
Combustion Air and Vent System
Lubrication
SYSTEM OPERATION INFORMATION
Condensate Drain Assembly
Blower Compartment
Fan Mode
Cooling Mode
Furnace Fails to Operate
M3 Downflow Furnace
wiring
Figure 30. Downflow Furnace Wiring Diagram
Factory Wired
If any of the original
Page
INSTALLATION/PERFORMANCE CHECK LIST
¢7082197¤
708219E
