Fan Delay DIP Switch Settings

COOL ON DELAY:6SEC.

COOL OFF DELAY:60 SEC.

HEATON DELAY:30 SEC.

HEAT OFF DELAY

60SEC 100SEC 140SEC 180SEC 25-23-47

Electrical Connections

NOTE: Junction Box can be

mounted to either the left or right side.

1_5V. aOHL

G_=_nd

[ Low Voltage

;Terl_nn_

:i

25-23-42

7. Ductwork and Filter

CARBON MONOXIDE POISONING HAZARD

Failure to properly seal duct can result in death, personal

injury and/or property damage.

Do NOT draw return air from inside a closet or utility room. Return air duct MUST be sealed to furnace casing.

Installation

NOTE: Design and install air distribution system to comply with

Air Conditioning Contractors of America manuals and/or NFPA pamphlets 90A and 90B or other approved methods that conform to local codes and good trade practices.

1.When furnace supply ducts carry air outside furnace area, seal return air duct to furnace casing and terminate duct outside furnace space.

2.Install air conditioning cooling coil (evaporator) on outlet side of furnace.

Control Center Fuse

The 24V circuit contains a 5-amp, automotive-type fuse located on fan timer board. (See Figure 32) Any electrical shorts of 24V

wiring during installation, service, or maintenance may cause

fuse to blow. If fuse replacement is required, use only a fuse of identical size (5 amp.)

Fan Timer Connections

_- DIP Switch

FUSE_

¢&25-23-41

3.For furnaces installed without a cooling coil it is recom- mended that the outlet duct be provided with a removable access panel. This panel should be accessible when the furnace is installed so the exterior of the heat exchanger can be viewed for inspections. The access panel MUST be sealed to prevent leaks.

4.If separate evaporator and blower units are used, install good sealing dampers for air flow control. Chilled air going

through the furnace could ca use condensation and shorten the furnace life.

NOTE: Dampers (field supplied) can be either automatic or manual. Manually operated dampers MUST be equipped with a

means to prevent furnace or air conditioning operation unless damper is in the full heat or cool position.

E_

44001 111400

Page 33 Page 35
Page 34
Image 34
Sears N9MP1 Ductwork and Filter, Installation, Control Center Fuse, Fan Delay DIP Switch Settings, Fan Timer Connections
Page 33 Page 35

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.
Top Page Image Contents