Nordyne CMF80-PG User Manual

Owners Manual/Installation Instructions
CMF80-PG Convertible (65, 75, and 90 KBTU/H Inputs),
CMF 100-PG (90 KBTU/H Input)
CMF80-PO Convertible (65, 75, and 90 KBTU/H Inputs),
CMF 100-PO (90 KBTU/H Input)
Counterflow Gas or Oil Heating Appliance
Read all instructions carefully before beginning the installation. Read all labels and tags
on the furnace carefully and follow all precautions outlined on those labels and tags.
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
!
WARNING:
Improper installation, alteration, ser-
vice or maintenance can cause injury
or property damage. Refer to this
manual for assistance or consult a
qualified installer, service agency, or
the gas supplier for additional infor-
mation.
FOR YOUR SAFETY
WHAT TO DO IF YOU
SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not
use any phone in your building.
• 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.
Rated CMF-PG CMF-PO CMF-PG CMF-PO
BTUH 80 CONV. 80 CONV. 100 100
Input 75,000 75,000 90,000 90,000
Output 56,000 60,000 68,000 72,000
GENERAL
CMF furnaces are high quality, direct vent
furnaces used for manufactured housing, rec-
reational vehicle, and residential
†
applications.
These furnaces are offered in either power gas
(designated by PG) or power oil (designated by
PO) models. The power gas models are de-
signed for operation with either natural or pro-
pane (LP) gas.
The CMF series is convertible from power oil to
power gas, and vice versa. Furthermore, the
firing rate of the CMF80 Convertible Series can
be changed using a certified NORDYNE
conversion kit field-installed by a qualified service
technician. Refer to the “Firing Rate Conversion”
section later in these instructions for more
information on the firing rate change.
These furnaces are certified to the UL307
standards (UL 307A for oil models; UL 307B for
gas models), and can be installed in a variety of
applications, as shown in Table 1. This furnace
is not to be used for temporary heating of
buildings or structures under construction.
!
WARNING:
This furnace must be installed by a quali-
fied installing agency and in accordance
with applicable local codes and ordi-
nances that govern this type of equip-
ment. Failure to properly install the fur-
nace, base assembly, and venting sys-
tem as described herein may damage the
equipment and/or the home, can create a
fire or asphyxiation hazard, violates U.S.
listing requirements, and will void the
warranty. This furnace is NOT approved
for installation with split system air con-
ditioning. Use a NORDYNE packaged air
conditioning system.

Nordyne CMF80-PG Specifications

General

Brand	Nordyne
Model	CMF80-PG
Category	Heating System
Heating Capacity	80, 000 BTU
Efficiency	80% AFUE
Weight	120 lbs
Fuel Type	Natural Gas
Vent Size	4 inches

Summary

General Information and Safety

For Your Safety

General safety precautions for operating the appliance.

What to Do If You Smell Gas

Emergency procedure for gas leaks.

General Furnace Overview

Overview of the furnace series and models.

Installation Requirements

Equipment Check Upon Arrival

Inspect the unit for damage and completeness upon delivery.

Compliance with Codes and Standards

Requirements for installation codes and regulations.

Combustion Air and Ventilation Requirements

Ensuring adequate air supply for operation.

Venting Requirements for Manufactured Homes

Specific venting guidelines for manufactured housing.

Venting Requirements for Residential Installations

Specific venting guidelines for residential settings.

Venting System Testing Procedures

Steps for testing the venting system's functionality.

Unit Installation

Furnace Base Installation Types

Installation procedures for MA-200 and MA-100 bases.

Minimum Clearances to Adjacent Materials

Required space around unit for safety & service.

Combustion Air and Ducting Installation

Connecting the combustion air supply duct.

Damper Installation

Installing an automatic shut-off damper.

Furnace Placement on Base Assembly

Positioning the furnace onto its base.

Cottage Base Installation

Installing the CB-200A cottage base.

Closet Installation Guidelines

Requirements for installing the furnace in a closet.

SRJ Roof Jack Installation

Installing the SRJ series roof jack.

Vent Pipe and Roof Jack Connection

Connecting the vent pipe to the roof jack.

Chimney Installation Procedures

Venting the furnace through an existing chimney.

Ventilaire Air Quality Package Installation

Installing the optional air quality accessory.

Fuel Connections

Gas Piping Requirements (PG Series)

Connecting the gas supply piping for PG models.

Pipe Length Selection Chart

Determining appropriate pipe length by diameter.

Oil Line Hook-Up Systems

Connecting the oil supply and return lines.

Eliminating Air Leaks in Oil Lines

Ensuring airtight connections for oil supply.

Fuel Oil Type Recommendations

Specifying compatible fuel oil grades.

Wiring and Electrical

Wiring Diagrams Overview

Visual guide to electrical connections.

Line Voltage Requirements and Connections

Connecting the main power supply.

Room Thermostat Installation and Wiring

Selecting location and wiring the thermostat.

Fan and Limit Control Settings

Adjusting blower and limit controls.

Gas Burner Lighting and Operation

Safety Precautions for Gas Burners

Warnings before lighting or operating gas burners.

Procedure for Gas Leaks

Actions to take if gas is smelled.

PG Direct Ignition Burner Operation

Steps to start and operate the gas burner.

Checking Furnace Input and Orifice Size

Verifying correct gas input and orifice.

Measuring Gas Pressures

Checking inlet and manifold gas pressures.

Gas Burner Controls and Conversion

Understanding controls & converting to LP gas.

Burner Adjustment and Settings

Adjusting air shutter and checking burner settings.

Gas Furnace Operating Sequence

Step-by-step operation of the gas furnace.

Oil Burner Lighting and Operation

Oil Burner Start-Up Procedure

Steps to start the oil burner.

Air-Bleed Procedure for Oil Pump

Removing air from the oil supply line.

Oil Burner Shutdown Procedure

Steps to turn off the oil burner.

Flame and Electrode Adjustment

Adjusting flame quality & electrode positioning.

Ignition Control Switching

Changing ignition duty mode.

Firing Rate Conversion for Oil Burners

Adjusting the burner's firing rate.

Oil Furnace Operating Sequence (Honeywell R7184)

Step-by-step operation of the oil furnace.

Adjusting Heat Distribution

Balancing heat output to different rooms.

Troubleshooting and Service

Service Precautions and Warnings

Safety and handling during servicing.

Burner Motor and Ignition Issues

Diagnosing motor & ignition system problems.

Flame and Lockout Troubleshooting

Diagnosing flame ignition & safety lockout.

Burner Operation and Heat Output Issues

Diagnosing insufficient heat & burner operation.

Control Module Status Indicators

Interpreting fault codes for gas/oil furnaces.

Honeywell R7184 Primary Control Troubleshooting

Specific troubleshooting for R7184 control.

Cad Cell Resistance Checks

Testing cad cell resistance for flame sensing.