To Next PageTo Next Page
Need help?Do you have a question about the Nordyne CMF80-PO and is the answer not in the manual?
Instructions for inspecting the furnace unit upon arrival for any damages or shortages.
Guidance on complying with all applicable codes, standards, and local regulations for installation.
Details on providing adequate combustion air and ventilation as per relevant codes and standards.
Detailed steps for installing the furnace using the MA-200 base pan for manufactured homes.
Guidelines for sizing and installing gas supply piping for PG series furnaces.
Recommendations for oil piping installation following local codes and standards.
Recommended hook-up for oil supply lines when vertical lift is not more than eight feet.
Procedure for a two-line oil supply system when vertical lift exceeds eight feet.
Ensuring correct voltage, frequency, and phase of the supply source match unit specifications.
Step-by-step instructions for connecting the power supply wiring to the furnace control box.
Crucial safety information to read before operating the gas furnace.
Immediate safety steps to take if a gas leak is detected.
Step-by-step guide for starting and operating the direct ignition gas burner.
Steps to follow for the initial start-up of the oil burner.
Process for bleeding air from the oil pump in a single-pipe installation.
Steps to properly shut down the oil burner.
Procedure for adjusting the air shutter for optimal CO2 and smoke levels.
Instructions for checking and adjusting electrode positioning for proper ignition.
Information on converting the furnace's firing rate using certified kits.
Detailed sequence of operations for the gas furnace during a heating call.
Sequence of operations for the oil furnace using the Honeywell R7184 primary control.
Troubleshooting steps when the burner motor fails to start despite a thermostat call for heat.
Troubleshooting steps when the burner motor runs but no flame is produced.
Diagnosing issues when the ignition control has power but the ignitor does not heat.
Troubleshooting steps when the main flame ignites but the burner subsequently locks out.
Diagnosing issues when 24V is supplied but no gas flows to the main burner.
Troubleshooting steps when the burner operates but does not provide sufficient heat.
Troubleshooting steps when the burner fails to shut off after the thermostat is satisfied.
Steps to address noisy fire conditions, often related to air adjustment.
Tips for reducing high gas bills, focusing on efficiency and insulation.
Troubleshooting steps when the circulation blower does not operate while the burner is running.
Indicator light status and meanings for gas furnace control module lockouts.
Indicator light status and meanings for oil furnace primary control (lockout, recycle, cad cell).
Steps to diagnose why the burner does not start when a call for heat is initiated.
Troubleshooting burner lockout with flashing indicator light, often related to primary control issues.
Diagnosing burner start issues indicated by specific flashing light patterns on the primary control.
Procedure for checking cad cell resistance to ensure proper burner operation.
Instructions for inspecting the furnace unit upon arrival for any damages or shortages.
Guidance on complying with all applicable codes, standards, and local regulations for installation.
Details on providing adequate combustion air and ventilation as per relevant codes and standards.
Detailed steps for installing the furnace using the MA-200 base pan for manufactured homes.
Guidelines for sizing and installing gas supply piping for PG series furnaces.
Recommendations for oil piping installation following local codes and standards.
Recommended hook-up for oil supply lines when vertical lift is not more than eight feet.
Procedure for a two-line oil supply system when vertical lift exceeds eight feet.
Ensuring correct voltage, frequency, and phase of the supply source match unit specifications.
Step-by-step instructions for connecting the power supply wiring to the furnace control box.
Crucial safety information to read before operating the gas furnace.
Immediate safety steps to take if a gas leak is detected.
Step-by-step guide for starting and operating the direct ignition gas burner.
Steps to follow for the initial start-up of the oil burner.
Process for bleeding air from the oil pump in a single-pipe installation.
Steps to properly shut down the oil burner.
Procedure for adjusting the air shutter for optimal CO2 and smoke levels.
Instructions for checking and adjusting electrode positioning for proper ignition.
Information on converting the furnace's firing rate using certified kits.
Detailed sequence of operations for the gas furnace during a heating call.
Sequence of operations for the oil furnace using the Honeywell R7184 primary control.
Troubleshooting steps when the burner motor fails to start despite a thermostat call for heat.
Troubleshooting steps when the burner motor runs but no flame is produced.
Diagnosing issues when the ignition control has power but the ignitor does not heat.
Troubleshooting steps when the main flame ignites but the burner subsequently locks out.
Diagnosing issues when 24V is supplied but no gas flows to the main burner.
Troubleshooting steps when the burner operates but does not provide sufficient heat.
Troubleshooting steps when the burner fails to shut off after the thermostat is satisfied.
Steps to address noisy fire conditions, often related to air adjustment.
Tips for reducing high gas bills, focusing on efficiency and insulation.
Troubleshooting steps when the circulation blower does not operate while the burner is running.
Indicator light status and meanings for gas furnace control module lockouts.
Indicator light status and meanings for oil furnace primary control (lockout, recycle, cad cell).
Steps to diagnose why the burner does not start when a call for heat is initiated.
Troubleshooting burner lockout with flashing indicator light, often related to primary control issues.
Diagnosing burner start issues indicated by specific flashing light patterns on the primary control.
Procedure for checking cad cell resistance to ensure proper burner operation.
This document provides comprehensive instructions for the installation, operation, and maintenance of Counterflow Gas or Oil Heating Appliances, specifically the CMF80-PG Convertible, CMF100-PG, CMF80-PO Convertible, and CMF100-PO models. These furnaces are designed for manufactured housing, recreational vehicle, and residential applications, offering flexibility in fuel type (power gas or power oil) and, for the CMF80 Convertible Series, adjustable firing rates.
The CMF series furnaces are high-quality, direct-vent heating appliances. They are designed to provide forced-air heating for various dwelling types. The "PG" models are power gas units, capable of operating with either natural gas or propane (LP) gas, while the "PO" models are power oil units. A key feature is their convertibility between power oil and power gas, allowing for adaptation to different fuel availability or preferences. For the CMF80 Convertible Series, the firing rate can also be adjusted using a certified conversion kit, offering flexibility in heating capacity.
The furnace operates by drawing combustion air, either directly from outside the home (direct vent) or from the conditioned space, depending on the installation type. The combustion air is then mixed with fuel (gas or oil) and ignited to produce heat. A blower circulates the heated air through a duct system to warm the living space. The flue products are exhausted to the outside, ensuring safe operation.
The gas furnace operating sequence involves a call for heat from the thermostat, which energizes the combustion blower motor. After a safety start check and ignitor warm-up period, the gas valve opens, and the ignitor ignites the gas. Flame rectification principles detect the flame, and if successful, the ignitor de-energizes while the gas valve remains open. The circulating air blower then energizes to distribute heat. If flame is not detected, the control attempts re-ignition before locking out. The oil furnace operating sequence, particularly with the Honeywell R7184 Control, also begins with a call for heat, followed by a brief delay for a safe start check. The ignition and motor turn on, and a flame should establish within a lockout time. If flame is not sensed, the control shuts down on safety lockout and requires manual reset. Once flame is established, the ignition remains on briefly for stability, then turns off (interrupted ignition), and the circulating air blower energizes.
The furnaces are certified to UL307 standards (UL 307A for oil models; UL 307B for gas models), ensuring compliance with safety regulations. They can be installed in various configurations, including manufactured housing and residential settings, with specific requirements for base types (MA-100, MA-200 Universal Base, CB-200A Cottage Base) and flue product exhaustion (NORDYNE SRJ Roofjack or existing chimney).
For gas models, the appliance is shipped from the factory for natural gas but can be converted to LP gas using a specific procedure involving orifice replacement and regulator converter adjustment. The air shutter setting for the burner is factory pre-set but may need adjustment during firing rate conversion to ensure optimal combustion efficiency and prevent carbon monoxide production.
The control system includes a fan and limit switch with three levers: FAN ON, FAN OFF, and LIMIT OFF. These levers control the blower operation, with recommended factory settings for energizing (FAN ON at 110°F) and stopping (FAN OFF at 90°F) the blower to prevent circulation of cool air. A LIMIT OFF lever acts as a safety stop, factory-set at 160°F, and should not be adjusted. An auxiliary manual reset limit is also included to protect against blower motor failure.
Room thermostat requirements specify placement approximately five feet above the floor in an accessible living or adjoining room, preferably on an inside wall, away from abnormal heat sources (sunlight, radios, TVs, lamps) or cold drafts (outside walls, stairwells, windows). The heat anticipator of the thermostat should be adjusted to .4 amps for power oil models and .9 for power gas direct ignition models.
Regular maintenance is crucial for safe and efficient operation. The manual outlines several key maintenance tasks:
The document stresses the importance of following all instructions, local codes, and ordinances to ensure safe and proper operation, warning against improper installation, alteration, service, or maintenance, which can lead to injury, property damage, fire, or asphyxiation hazards, and void the warranty.
General| Fuel Type | Oil |
|---|---|
| Voltage | 115V |
| Blower Motor | Multi-speed |
| Thermostat Compatibility | Standard |
| Heating Capacity | 80, 000 BTU |
| BTU | 80, 000 BTU |
| Stages | Single Stage |
| Efficiency | 80% |
