air, to a larger number (clockwise) for more air. Tighten the lock nut after completing the adjust- ment. For best results, use instruments to measure between 8-9% CO2 after the combus- tion air has been adjusted.

Oil Gun Only

It is recommended that the CO2 and Smoke levels should be measured for maximum per- formance. CO2 readings should be 10-11% for 66,000 BTUH furnaces and 12-13% for 86,000 BTUH furnaces. The Smoke should be N0. 0 on the Bacharach Scale, and 0 to 0.02 negative draft over fire.

Electrode Setting (Oil Gun Only)

Poor ignition of the oil spray may result if the electrodes are not adjusted as shown in Figure

32.Do not permit any electrodes to be grounded to any surface.

Switching the Honeywell R7184 Ignition Control between Interrupted and Intermit- tent Duty (Oil Gun Only)

The Honeywell oil primary control can be switched between interrupted and intermittent ignition control. To switch from interrupted duty (Factory set) to intermittent duty, remove the igniter wire from the blue control wire. Attach the burner motor and igniter wire to the orange control wire. Cap and reseal the orange control wire. Cap and isolate the blue control wire.

5/32” GAP

ELECTRODE

5/16” ABOVE CL

NOZZLE

0-1/16”

1 3/8”

Figure 32. Oil Gun electrode Position

!CAUTION:

•Combustion air adjustment must be made only by a qualified technician. Improper air adjustment may cause unsafe operation, explosion and/or fire asphyxiation.

•If the input to the furnace is too great because of excessive gas pressure, wrong size nozzle or orifice, high alti- tude, etc., the burner flame will be sooty and can produce carbon mon- oxide, which could result in unsafe operation, explosion and/or fire or asphyxiation.

GAS CONVERSION

This gas fired heating appliance was shipped from the factory for use with natural gas. How- ever, the appliance can be converted for use with LP gas. Use the following procedure for gas conversion of the burner.

ATMOSPHERIC AND DIRECT IGNITION FURNACES

a.Follow the instructions to “Turn Off Gas to the Appliance.”

b.Disconnect the gas pipe union and the elec- trical wires connected to the gas valve.

c.Remove the pilot tube and thermocouple from the gas valve (M1G*).

Honeywell

 

 

 

 

 

 

Valve

T

 

 

OR

 

P

 

A

 

N

L

 

N

 

 

 

 

 

 

 

 

L

T

A

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

PRESSURE

 

 

 

 

OTHER SIDE

 

 

 

 

OF CAP

 

REGULATOR

 

 

 

 

 

 

 

 

 

 

 

 

CAP

 

 

 

 

 

 

 

A

T

N

 

 

 

 

 

 

 

 

 

 

 

N

 

 

 

 

 

 

 

T

A

 

 

 

 

 

M11678

Figure 33. Convertible Pressure

Regulator Cap

26

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Nordyne M1S, M1G, M1B, M1M Electrode Setting Oil Gun Only, GAS Conversion, Atmospheric and Direct Ignition Furnaces
Page 25 Page 27

M1M, M1S, M1B, M1G specifications

Nordyne, a renowned player in the HVAC industry, has introduced a range of high-efficiency gas furnaces, including the M1S, M1G, M1B, and M1M models. Each of these furnaces is designed to provide efficient heating solutions tailored to the needs of homeowners.

The M1S series is well-known for its reliability and performance. It features a single-stage heating process that delivers consistent warmth to any space. With its multi-speed blower, the M1S ensures quiet and comfortable airflow, adapting seamlessly to varying temperature demands. Its robust construction coupled with an energy-efficient design makes it an ideal choice for those looking for dependable heating without sky-high utility bills.

The M1G model steps it up with a two-stage heating system that offers enhanced comfort and efficiency. By operating at a lower speed during milder conditions, the M1G can effectively reduce energy consumption while still maintaining a cozy environment. It is equipped with a variable-speed blower that not only enhances efficiency but also minimizes noise, making it perfect for residential areas. The M1G is designed with advanced safety features, including an integrated control board that monitors furnace functions to ensure optimal performance.

For those seeking a budget-friendly option without compromising on quality, the M1B model provides a solid performance with its straightforward, reliable single-stage heating. While it may lack some of the advanced features found in higher-end models, the M1B is built for ease of use with straightforward controls and maintenance, making it a great option for families.

The M1M model integrates cutting-edge technology with a focus on maximum efficiency. Featuring a modulating gas valve, this model can adjust its output based on real-time heating requirements. This adaptability ensures that the furnace operates at peak efficiency, significantly lowering energy bills and improving overall comfort. The M1M also boasts advanced diagnostic capabilities that allow for easy troubleshooting, thus reducing maintenance time and costs.

In summary, Nordyne's M1 series furnaces—M1S, M1G, M1B, and M1M—offer a range of options to meet diverse heating needs. With technologies designed for efficiency, reliability, and comfort, Nordyne continues to solidify its reputation as a leader in the HVAC market, providing homeowners with effective heating solutions tailored to their lifestyles and budgets.
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