h. Gas piping is not run in or through the return duct system.

i.Test the negative pressure in the closet with the air-circulating fan operating at high speed and the closet closed. The negative pressure is to be no more negative than minus 0.05 inch water column.

j.Air conditioning systems may require more duct register and open louver area to ob- tain necessary airflow. Use NORDYNE’s certiduct program to determine proper duct size for A/C.

8.AIR DISTRIBUTION SYSTEMS

For proper air distribution, the supply duct system must be designed so that the static pressure measured external to the furnace does not exceed the listed static pressure rating shown on the furnace rating plate.

Location, size, and number of registers should be selected on the basis of best air distribution and floor plan of the home.

!CAUTION:

HAZARD OF ASPHYXIATION: Do not cover or restrict return air opening.

9.ROOF JACK SELECTION

Note: Install only Roof Jack Assemblies listed in Table 5 on this heating appliance.

a.Determine depth of ceiling cavity from center of roof opening to center of ceiling opening. (See Dimension “A” in Figure 6.)

b.Determine ceiling height and subtract height of furnace. (See Dimension “B” in Figure 6.)

c.Add dimensions A + B (and X from Table 6 and Figure 7 if slant deck flashing is used). The total length of (A + B + X) must be within the minimum and maximum range of one of the Roof Jacks listed in Table 5.

APPLICATION NOTES:

a. FAW, FAWT, SAW and SAWT Series Roof Jacks with a 5" diameter inner vent pipe may be used with all models of M1 Series gas and oil furnaces.

b.F=Flat Flashing; flexes from 0/12 to 1/12 roof slope.

c.S=Slant Flashing. 2.5/12 Slope flexes from 1/ 12 to 4/12 roof slope, 4/12 flexes from 3/12 to 5/12.

d.Stainless steel roof jacks are available.

e.If the roof jack crown is covered or blocked with snow, the furnace will not operate prop- erly. If the home is located in regions where snow accumulation exceeds 7” (HUD snowload zones) use an external roof jack extension p/n 901937.

f.M1 furnaces may be used with roof jacks as tall as 170” (except M1M 056 & M1B 066 models, which are limited to 120”). An internal roof jack extension (p/n 901935 - 10”, p/n 903107 - 18”) can be used to increase roof jack height. All connections inside the home must be made below the ceiling.

These extensions are available as optional accessories and may be purchased through your NORDYNE distributor.

 

USE SLANT DECK

 

IF ROOF PITCH IS:

FLASHING NO.

"X" FACTOR IS:

 

"F Series Roof Jack

 

 

 

 

2" in 12"

903893 (2.5/12)

2-1/8"

2-1/2" in 12"

903893 (2.5/12)

2-1/2"

3" in 12"

903894 (3/12)

2-7/8"

3-1/2" in 12"

903894 (3/12)

3-1/4"

4" in 12"

903895 (4/12)

3-5/8"

"S" Series Roof Jack (2.5/12 Pitch only)

 

 

 

4-1/2" in 12"

903895 (2.5/12)

2-1/8"

5" in 12"

903895 (2.5/12)

2-1/2"

5-1/2" in 12"

903894 (3/12)

2-7/8"

6" in 12"

903894 (3/12)

3-1/4"

6-1/2" in 12"

903895 (4/12)

3-5/8"

Optional Deck Flashings for Flat and 2.5/12 Pitch

Roof Jacks.

(4/12 Pitch Roof Jacks not applicable.)

Table 6. Slant Deck Flashings

 

 

Use Duct Connector

If "X" (Floor Cavity) is:

Model Part Number:

English

Metric (mm)

Finger Tab

Screw Down

7/8"

22

901987

904008

2"

51

901988

904009

4-1/4"

108

901989

904010

6-1/4"

159

901990

904011

8-1/4"

210

901991

904012

10-1/4"

260

901992

904013

12-1/4"

311

901993

904014

Table 7. Floor Cavity Sizes

8

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Nordyne M1G AIR Distribution Systems, Roof Jack Selection, Application Notes, Slant Deck Flashings, Floor Cavity Sizes
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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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