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Immediate actions to take if a gas leak is detected.
Precautions against storing flammable vapors near appliances.
Overview of CMF convertible gas and oil furnaces.
Consequences of improper installation or alteration.
Procedures for checking and reporting shipping damage.
Installer obligations for local codes and national standards.
Specific venting requirements for manufactured homes.
Rules for venting residential installations, including chimney use.
Steps to ensure proper venting before appliance startup.
Table detailing required clearances around the furnace.
Steps for cutting openings in the base pan for ducts.
Instructions for cutting openings in flooring and distribution ducts.
Connecting combustion air duct and installing the adapter.
Minimum requirements for return air openings in closets.
Specifics on louvered doors and free area for closet installations.
Chart for choosing the correct SRJ roof jack model.
Steps for mounting and sealing the roof jack assembly.
Guidelines for installing the furnace through an existing chimney.
Rules for sizing and installing gas supply piping.
Methods to ensure airtight oil supply lines and prevent leaks.
Diagram illustrating the furnace's wiring connections.
Step-by-step guide for connecting the main power.
Explanation of the FAN ON, FAN OFF, and LIMIT OFF levers.
Recommendations for thermostat placement and connections.
Detailed instructions for safely operating gas burners.
Step-by-step process for initiating furnace operation.
Procedures for checking and setting the correct gas input.
Guide for converting the burner from natural gas to LP gas.
Setting the air shutter for optimal combustion and CO levels.
Procedures for priming the oil pump and starting the burner.
Information on adjusting the furnace's firing rate with conversion kits.
Comprehensive steps for gas furnace operation.
Operational steps for oil furnaces using Honeywell R7184 control.
Diagnosing why the burner motor fails to start.
Troubleshooting steps when the motor operates but no flame is produced.
Diagnosing issues with ignition failure and gas valve operation.
Addressing insufficient heating and excessive gas consumption.
Interpreting flash codes for gas furnace safety lockouts.
Procedures for resetting and understanding oil furnace lockout conditions.
Troubleshooting oil furnace issues based on indicator light flashes.
Testing cad cell resistance for proper flame sensing.
Immediate actions to take if a gas leak is detected.
Precautions against storing flammable vapors near appliances.
Overview of CMF convertible gas and oil furnaces.
Consequences of improper installation or alteration.
Procedures for checking and reporting shipping damage.
Installer obligations for local codes and national standards.
Specific venting requirements for manufactured homes.
Rules for venting residential installations, including chimney use.
Steps to ensure proper venting before appliance startup.
Table detailing required clearances around the furnace.
Steps for cutting openings in the base pan for ducts.
Instructions for cutting openings in flooring and distribution ducts.
Connecting combustion air duct and installing the adapter.
Minimum requirements for return air openings in closets.
Specifics on louvered doors and free area for closet installations.
Chart for choosing the correct SRJ roof jack model.
Steps for mounting and sealing the roof jack assembly.
Guidelines for installing the furnace through an existing chimney.
Rules for sizing and installing gas supply piping.
Methods to ensure airtight oil supply lines and prevent leaks.
Diagram illustrating the furnace's wiring connections.
Step-by-step guide for connecting the main power.
Explanation of the FAN ON, FAN OFF, and LIMIT OFF levers.
Recommendations for thermostat placement and connections.
Detailed instructions for safely operating gas burners.
Step-by-step process for initiating furnace operation.
Procedures for checking and setting the correct gas input.
Guide for converting the burner from natural gas to LP gas.
Setting the air shutter for optimal combustion and CO levels.
Procedures for priming the oil pump and starting the burner.
Information on adjusting the furnace's firing rate with conversion kits.
Comprehensive steps for gas furnace operation.
Operational steps for oil furnaces using Honeywell R7184 control.
Diagnosing why the burner motor fails to start.
Troubleshooting steps when the motor operates but no flame is produced.
Diagnosing issues with ignition failure and gas valve operation.
Addressing insufficient heating and excessive gas consumption.
Interpreting flash codes for gas furnace safety lockouts.
Procedures for resetting and understanding oil furnace lockout conditions.
Troubleshooting oil furnace issues based on indicator light flashes.
Testing cad cell resistance for proper flame sensing.
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| Brand | Nordyne |
|---|---|
| Model | CMF 100-PG |
| Category | Heating System |
| Language | English |
