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Sears 9MPD, N9MP2 manual Connecting Vent and Combustion Air Piping, Vent Pipe Connection, Pvc, Must

Models: 9MPD N9MP1 N9MP2

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NOTE:Allgasketsandsealsmustbein place for sealed combus-

tion applications.

Ensure that the vent fitting is securely attached to the combustion blower using the rubber coupling and clamps.

Connect the PVC vent extension pipe to the vent fitting. This pipe

has a built-in channel to assist vent condensate disposal. Align the arrow on the PVC pipe with the airflow marking arrow on the vent fitting. See label on the PVC pipe for proper installation. This pipe may only be shortened if an elbow is used to connect the

PVC vent extension tube to field-installed vent pipe. Securely at- tach the PVC vent extension pipe to the vent fitting with the cla rap.

This configuration allows left side venting from the furnace. If right side venting is required, the combustion blower must be relocated

on the plastic transition box. Loosen the four(4) screws that se-

cure the blower to the transition approximately 1/2". Rotate the blower 180 ° and secure with the four(4) screws. Note that some combustion blowers have plastic spacers on the mounting legs of the blower located at the 6 and 12 o'clock positions (blower snout to the left or right) that are required for proper fit up of the blower to the transition. Use caution to not over tighten the screws to pre- vent stripping out of the plastic mounting holes.

NOTE: The vent fitting MUST be installed with the airflow marking arrow pointed toward the vent pipe, with the drain stub at a 5 ° to 10 ° downward slope.

Plug the upper drain stub on the vent fitting with the yellow plastic cap.

Connect the PVC vent extension pipe to the vent fitting. This pipe

has a built-in channel to assist vent condensate disposal. Align the arrow on the PVC pipe with the airflow marking arrow on the vent fitting. See label on the PVC pipe for proper installation. This pipe may only be shortened if an elbow is used to connect the

PVC vent extension tube to field-installed vent pipe. Securely at- tach the PVC vent extension pipe to the vent fitting with the cla rap.

Remove the pressure switch hose from the upper stub on the plastic transition box.

Relocate the plastic caps on the stubs of the plastic transition box from the lower stubs to the upper stubs and secure tightly with the clamps.

Route the pressure switch hose to the lower stub on the plastic transition box. Cut off excess hose and discard. Connect the pres- sure switch hose to the lower stub on the plastic transition box. NOTE: Failure to correctly install the pressure switch hose to the transition box can adversely affect the safety control operation.

Connect the 3/4" OD rubber hose with the 90 ° bend to the drain stub on the bottom of the plastic transition box and secure with a 3/4" clamp.

Route the hose to the large drain stub on the condensate trap. Cut off excess hose and discard. Connect the hose to the drain stub

on the transition and secure with a 3/4" clamp.

Connect the 5/8" OD rubber hose with the 90 ° bend to the left drain stub on the vent fitting and secure with a 5/8" clamp.

Route the hose to the smaller stub on the condensate trap. Cut off excess hose and discard. Connect the hose to the drain stub on

the trap and secure with a 5/8" clamp.

For left side or right side mounted condensate trap, the pres- sure tap on the condensate trap MUST be connected to the un-

used pressure tap located on the top of the plastic transition box. Remove the plastic caps from the pressure tap on the condensate trap and the plastic transition and connect the 5/16" OD rubber hose. (See Figure 17)

NOTE: Route hoses to the condensate trap with no kinking or

binding for proper condensate drainage.

Connecting Vent and Combustion Air Piping

CARBON MONOXIDE POISONING HAZARD

Failure to properly seal vent piping can result in death,

personal injury and/or property damage.

Cement or mechanically seal all joints, fittings, etc. to prevent leakage of flue gases.

Refer to the Figure 8 through Figure 17 that corresponds to the installation position of the furnace for the application.

Preassemble the vent and combustion air piping from the furnace to the vent termination. Do not cement the pipe joints until the pipe

preassembly process is complete.

Combustion Air Pipe Connection (Dual Certified or

Direct Vent)

Install the air intake coupling and gasket to the furnace with the four(4) screws.

Note: The air intake coupling and gasket can be installed to the top panel to the alternate air intake locations on either the left or right side panels of the furnace.

For downflowinstallation, the air intake coupling and gasket must be installed to the alternate air intake location on either the left or

right side panels. Remove the 3" hole plug from the side panel and relocate to the air intake hole in the top panel. Use four screws to seal the four(4) mounting holes in the top panel next to the hole plug. Drill four(4) 7/64" diameter holes in the casing using the air intake coupling as the template.

The air intake coupling is sized for 2" PVC pipe.

Install the combustion air pipe to the air intake coupling using RTV sealant to provide for future serviceability.

Vent Pipe Connection

Install the vent pipe grommet to the furnace panel. Locate the grommet in the furnace panel at a location directly away from the vent fitting on the combustion blower. The grommet snaps intothe

3" hole plug from the furnace panel. NOTE: Depending on the installation position, the vent pipe grommet will be installed to the top panel or to the alternate location on the side panels. If needed, remove the 3" hole plug from the furnace panel and relocate to the open hole in the furnace panel. (See Figure 12 or Figure 17)

Install the vent pipe to the rubber coupling, the vent fitting or the

PVC vent extension pipe. Securely attach

using

the clamp

or

PVC

cement

as

required.

 

 

 

 

 

 

 

 

 

Note:

The

vent

fitting

MUST

be

installed

with

the

air

flow

marking

arrow

pointed

toward

the

vent

pipe.

(See Figure

18)

Some

installations

require the

vent

fitting

to

be

installed

with

a 5 ° to

10 ° downward

slope.

(See

Figures

8

-

17)

 

 

[_

44001 111400

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Sears 9MPD, N9MP2 Connecting Vent and Combustion Air Piping, Combustion Air Pipe Connection Dual Certified or, Pvc, Must
Page 25 Page 27

9MPD, N9MP1, N9MP2 specifications

The Sears N9MP2, N9MP1, and 9MPD are prominent models in the realm of residential heating systems, specifically designed to provide efficient and effective heating solutions. These models are part of Sears' commitment to quality and innovation, making them a popular choice among homeowners seeking reliability and performance.

The N9MP2 is a high-efficiency multi-speed gas furnace that boasts an impressive AFUE (Annual Fuel Utilization Efficiency) rating. This feature allows the furnace to convert a significant portion of fuel into usable heat, which effectively translates to lower energy bills for homeowners. The unit is equipped with a two-stage gas valve that provides increased comfort by adjusting the heating output based on demand, ensuring an even temperature throughout the home.

The N9MP1, like its counterpart, is known for its reliability and efficiency. It offers a single-stage operation that is ideal for homes needing consistent heating without the necessity for the more complex stages present in two-stage systems. This model also has a good AFUE rating, making it a cost-effective solution for families looking to reduce their heating expenses. Its design is tailored for easy installation and maintenance, allowing homeowners to keep their heating systems running at optimal performance without hassle.

The 9MPD model takes a step further with its advanced technology integration. It features a sophisticated control board that allows for easier diagnostics and enhanced system management. The 9MPD is also designed with quiet operation in mind, employing advanced sound-reduction technologies to minimize noise levels during heating cycles. Homeowners will appreciate the peace and quiet it brings, particularly in shared living spaces.

All three models are equipped with high-quality insulation and specialized heat exchangers that enhance their thermal efficiency. Additionally, they are designed with safety features such as automatic shut-off systems and robust flame rollout protection, ensuring a safe heating experience.

In terms of characteristics, these models are generally constructed with durable materials, designed to endure harsh weather conditions while providing consistent heating. They can be connected to various home automation systems, which adds to their appeal for tech-savvy consumers.

In conclusion, the Sears N9MP2, N9MP1, and 9MPD represent a comprehensive lineup of reliable, efficient, and technologically advanced heating systems suitable for contemporary homes. Their dedication to performance ensures that homeowners enjoy a warm and energy-efficient environment throughout the chilly seasons.