HONEYWELL SV9541M "SMART VALVE" Sequence of Operation

 

I POWERAPPLIEDTO APPUANCE

l

 

 

 

I THERMOSTAT CALLS FOR HEAT

I

 

 

 

 

¢

 

WAITFOR PRESSURESWITCHESTO OPEN

 

 

I

PRESSURESWITCHESPROVEDOPEN?

 

 

 

i

 

 

 

 

 

I

COMBUSTIONBLOWER ENERGIZED

 

 

 

 

I

 

 

 

 

 

 

PRESSURESWITCHESCLOSEDWITHIN30 SEC-

 

COMBUSTIONBLOWERDE- ENERGIZED

 

 

 

ONDS?

_1_

_[

FIVE MINUTEWAIT PERIOD

 

3SECONDPRE-PURGE

 

 

 

 

 

PILOTVALVEOPENS:

 

I

 

 

 

 

 

 

 

 

IGNITORPOWERED(1)

 

L THREEFAILURESECONDRECYCLEFLAMEDELAY

 

 

 

PILOT LIGHTSAND FLAMEIS SENSED

I_uI

PILOTVALVECLOSES;

 

 

 

DURING90 SECONDTRAILFOR

 

PILOTIGNITOROFF

 

 

 

IGNITION?

 

 

 

 

J

_I YES

MAIN VALVE OPENS,

HEATING FAN "ON" DELAY BEGINS

AFTERDELAY:CIRCULATINGBLOWER STARTS

I

 

I

YES

 

 

I CIRCULATINGBLOWER OFF AFTER DELAY

I

FLAME SENSE LOST?

 

+

 

 

 

 

 

.[ PILOT AND MAIN VALVECLOSE

 

 

THERMOSTAT CALL FOR HEAT ENDS

FLAME SENSE LOST MORE THAN FIVE

I

 

 

COMBUSTIONAIR BLOWER OFF AFTERPOST

 

 

TIMES INTHISCALL FOR HEAT?

J--PURGE

 

 

 

 

_ NO

I P,LOTANDMAINVALVECLOSE I

NO

YES

COMBUSTIONBLOWER DE- ENERGIZEDAFTER 30

SECONDPOST PURGE

(1)Ignitor "ON" for first 30 seconds of trial for ignition,then "OFF" for next 30 seconds. If the pilot has not lit, it turns back"ON" for the final 30seconds. The pilot valve remains energizedduring the entire 90 second trial for ignition.

NOTE: If main limit string opensandtakes longerthan 2 minutesto close, system goes intoI hour wait period.

ICIRCHLATBLOWEROFFNGAFTERDELAY I

/ WAFORNEXTCALLFOR.HEAT I

L

l

440O1102004

[_

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Sears 9MPD100J14B1, N9MP2050B12B1, N9MP2080F16B1, N9MP2075B12B1 manual Honeywell SV9541M Smart Valve Sequence of Operation

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.