Installation Positions

This furnace can be installed in an upflow, horizontal (either left or right) or downflow airflow position. DO NOT install this furnace on its back. For the upflow position, the return air ductwork can be at- tached to either the left or right side panel and/or the bottom. For

horizontal and downflow positions, the return air ductwork must be attached to the bottom. The return air ductwork must never be at-

tached to the back of the furnace.

Furnace Installation Considerations

The installation of the furnace for a given application will dictate the position of the furnace, the airflow, ductwork connections, vent and

combustion air piping. Consideration must be given to the follow- ing:

Condensate Trap and Drain Lines

The supplied condensate trap must be attached to the furnace side panel on either the left or right side. For horizontal installa- tions, the drain trap is vertically attached to the side panel below the furnace. A minimum clearance of 6" below the furnace is re-

quired for the condensate trap. Downward slope of the conden- sate drain line from the condensate trap to the drain location must be provided. Adequate freeze protection of the drain trap and the

Horizontal Furnace Installation

This furnace can be installed horizontally in an attic, basement, crawl space, alcove, or suspended from a ceiling in a basement or utility room. See Figure 4. Do not install furnace on its back or in the reverse airflow positions as safety control operation will be ad- versely affected.

Typical Horizontal Installation

Inlet Pipe (not used on Single Pipe model)

Vent

Condensate

Trap

drain line must be provided. See "Condensate Drain Trap"section for further details.

Leveling

Proper leveling of the furnace must be provided to insure proper

drainage of the condensate from the furnace. The furnace must be level to within 114"from front to back and from side to side for upflow

and downflow installations or top to bottom for horizontal installa- tions.

Vent and Combustion Air Connections

On the Dual Certified furnace, the vent and combustion air pipes attach to the furnace through the top panel for the upflow and hori-

zontal installations. For the downflow installation, the vent and

combustion air pipes attach to the furnace through the alternate locations on the furnace side panels.

Note: On the Direct Vent furnace, the vent pipe attaches to the fur- nace through the side panels. The combustion air pipe attaches to the top panel or to the alternate location on the side panel.

On the Single Pipe furnace, the vent pipe attaches to the furnace through the furnace side panels.

Note: Repositioning of the combustion blower is required for the vent pipe connection to the furnace through the "right side" panel.

See "Vent and Combustion Air Piping"section for further details.

If the furnace is to be suspended from the floor joists in a crawl space or the rafters in an attic, it is necessary to use steel pipe straps or an angle iron frame to rigidly attach the furnace to prevent movement. These straps should be attached to the furnace with sheet metal screws and to the rafters or joists with bolts. The pre- ferred method is to use an angle iron frame bolted to the rafters or joists. (Take caution to allowdoor panels to be removed for mainte- nance)

If the furnace is to be installed in a crawl space, consult local

codes. A suitable concrete pad or blocks are recommended for crawl space installation on the ground.

NOTE: 6" bottom clearance required for condensate trap.

Thirty (30) inches between the front of the furnace and adjacent

construction or other appliances MUST be maintained for service clearance.

Keep all insulating materials clear from Iouvered door. Insulating materials may be combustible.

The horizontal furnaces may be installed directly on combustible wood flooring or supports as long as all required furnace clear- ances are met. See Figure 4.

 

 

This furnace MUST NOT be installed directly on carpeting or tile or

 

 

other combustible material other than wood flooring or supports.

 

25-23-34

For horizontal installation over a finished living space. A field fabri-

 

cated auxiliary drain pan with drain pipe is required to prevent

 

 

NOTE:6" bottom clearancerequiredfor condensatetrap.

 

damage by overflow due to blocked condensate

drain.

44001 102004

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Sears 9MPD100J14B1, N9MP2050B12B1, N9MP2080F16B1, N9MP2075B12B1, N9MP2100F14B1, N9MP2125J20B1, N9MP2100J20B1 manual Leveling
Page 6 Page 8

9MPD100J20B1, N9MP2100J20B1, 9MPD050F12B1, N9MP1100J20B1, N9MP1125J20B1 specifications

The Sears N9MP1075B12B1, N9MPD125L20B1, N9MP1050B12B1, N9MPD080J16B1, and N9MP2125J20B1 are part of the trusted line of gas furnaces manufactured by Sears, specifically designed to deliver reliable heating solutions for residential applications. These models incorporate cutting-edge technology and robust engineering, making them popular choices among homeowners looking for efficiency and comfort.

One of the main features of these models is their high-efficiency operation. With Annual Fuel Utilization Efficiency (AFUE) ratings exceeding 90%, these furnaces convert a significant portion of fuel into usable heat, thereby reducing energy costs. The N9MP series employs a multi-speed blower system that optimizes airflow for enhanced comfort while minimizing noise levels, ensuring a pleasant indoor environment.

The N9MPD125L20B1 and N9MPD080J16B1 variants highlight their adaptability through dual-stage heating capabilities. This technology allows the furnace to adjust its output based on the thermal demands of the home, preventing energy wastage during milder conditions while providing robust heating during extreme cold spells. The two-stage combustion process not only improves comfort but also contributes to lower greenhouse gas emissions.

Durability is another hallmark of these Sears models. With heavy-duty heat exchangers crafted from high-quality materials, they are built to withstand the rigors of regular use. Additionally, the inclusion of advanced safety mechanisms ensures that the system operates securely, reducing potential risks associated with gas furnaces.

The N9MP2125J20B1 model stands out due to its whisper-quiet operation. Homeowners can enjoy a warm home without the disruptive sound commonly associated with traditional heating systems, thanks to the insulated cabinet design and efficient blower operation.

Furthermore, these models come equipped with user-friendly digital thermostats, which allow precise temperature control and programmable settings, enabling homeowners to tailor their heating needs to fit their lifestyle. The compatibility with smart home systems also adds convenience, enabling users to manage their heating remotely, saving even more energy.

In conclusion, the Sears N9MP1075B12B1, N9MPD125L20B1, N9MP1050B12B1, N9MPD080J16B1, and N9MP2125J20B1 gas furnaces exemplify innovation in heating technology. Their energy-efficient designs, advanced features, and durable construction make them reliable choices for homeowners seeking comfort and sustainability in their heating solutions.
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