Condensate Line Raised by Base

25-20-52

8. Checks and Adjustments

FIRE OR EXPLOSION HAZARD.

Failure to turn OFF gas at shut off before

connecting manometer could result in death, personal injury and/or property damage.

Turn OFF gas at shut off before connecting manometer.

Startup

NOTE: Refer to the start-up procedures in the "User's Information

Manual' or to the "Operating Instructions Label' on the furnace.

FIRE OR EXPLOSION HAZARD.

Failure to correct hazard could result in death, personal injury, and/or property damage.

If any sparks, odors or unusual noises occur, immediately shut OFF power to furnace. Check for wiring errors or obstruction to blower.

Gas SupplyPressure

Gas supply pressure should be within minimum and maximum val- ues listed on rating plate. Pressures are usually set by gas suppli- ers.

Manifold Gas Pressure Adjustment

NOTE: Make adjustment to manifold pressure with burners oper- ating.

1.Remove the burner compartment door.

2.With gas OFF, connect manometer to tapped opening on gas valve. Use manometer with a 0 to 15" water column range.

3.Turn gas ON and remove adjustment screw cover on gas

valve. Turn counterclockwise to decrease pressure and clockwise to increase.

4.For altitudes up to 2000', set pressure to value shown in Table 6 or Table 8, _+0.3" (8ram) water column. For alti-

tudes of 2000' to 8000', see Section 5 for correct pressure setting.

Adjust Pilot Burner

The furnace has a pilot flame to light the main burner. The flame should surround 3/8' to 1/2' of the flame sensor. See Figure 42. To

adjust, remove cap from pilot adjusting screw on gas valve. Turn

screw counterclockwise to increase or clockwise to decrease

flame as required. Replace adjusting screw cap.

Pilot Burner

Proper Flame

Adjustment

3/8" to 1/2"

Hot Surface

Igniter

10-11-65

Main Burner Flame Check

Allow the furnaceto run approximately 10 minutes then inspect the main burner and pilot flames. See Figure 43.

Check for the following (Figure 43):

•Stable and blue flames. Dust may cause orange tips or wisps of yellow, but flames MUST NOT have solid, yellow tips.

•Flames extending directly from burner into heat ex- changer.

•Flames do NOT touch sides of heat exchanger.

If any problems with main burner flames are noted, it may be nec- essary to adjust gas pressures, or check for drafts.

[_

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Sears N9MP2075B12B1 Checks and Adjustments, Gas SupplyPressure, Startup, Adjust Pilot Burner, Main Burner Flame Check
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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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