SERVICE AND TECHNICAL SUPPORT MANUAL - Single Stage PSC Blower Motor 35” Tall - High Efficiency Condensing Gas Furnace - N9MSE (A Series)

Oct 25, 2026

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SERVICE AND TECHNICAL SUPPORT MANUAL for a single-stage, high-efficiency condensing gas furnace featuring a PSC blower motor (35” tall). The manual provides safety labeling and signal-word definitions (DANGER, WARNING, CAUTION, NOTE) and explains hazard levels and safety-alert symbol usage. It outlines startup, adjustment, safety checks, condensate trap priming, gas line purging, temperature and airflow/thermostat settings, safety control checks, service and maintenance procedures, component tests, troubleshooting flow charts, wiring, sequence of operation, and parts replacement guidance for N9MSE A Series models.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages27

Reading Time1 h 8 min

AccessFree to download

TABLE OF CONTENTS

START-UP, ADJUSTMENT, AND SAFETY CHECK

SERVICE AND MAINTENANCE PROCEDURES

TROUBLESHOOTING − FLOW CHART

SEQUENCE OF OPERATION

PARTS REPLACEMENT INFORMATION GUIDE

PRODUCT NOMENCLATURE

WIRING DIAGRAM

SERVICE AND TECHNICAL SUPPORT MANUAL Single Stage, PSC Blower Motor 35” Tall, High Efficiency Condensing Gas Furnace N9MSE (A Series) Save this manual for future reference. | Safety Labeling and Signal Words | | | --- | --- | | DANGER, WARNING, CAUTION, and NOTE The signal words DANGER, WARNING, CAUTION, and NOTE are used to identify levels of hazard seriousness. The signal word DANGER is only used on product labels to signify an immediate hazard. The signal words WARNING, CAUTION, and NOTE will be used on product labels and throughout this manual and other manual that may apply to the product.
DANGER − Immediate hazards which will result in severe personal injury or death.
WARNING − Hazards or unsafe practices which could result in severe personal injury or death.
CAUTION − Hazards or unsafe practices which may result in minor personal injury or product or property damage.
NOTE − Used to highlight suggestions which will result in enhanced installation, reliability, or operation. | Signal Words in Manuals
The signal word WARNING is used throughout this manual in the following manner:

! WARNING
The signal word CAUTION is used throughout this manual in the following manner:

! CAUTION
Signal Words on Product Labeling
Signal words are used in combination with colors and/or pictures or product labels.
Safety−alert symbol
When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. | TABLE OF CONTENTS START−UP, ADJUSTMENT, AND SAFETY CHECK ........... 4 PRIME CONDENSATE TRAP WITH WATER ................. 4 PURGE GAS LINES ...................................... 4 ADJUST TEMPERATURE RISE ............................ 10 ADJUST BLOWER OFF DELAY (HEAT MODE) .............. 11 ADJUST COOLING AIRFLOW ............................. 11 ADJUST THERMOSTAT HEAT ANTICIPATOR ............... 11 CHECK SAFETY CONTROLS ............................. 11 CHECKLIST ............................................. 12 SERVICE AND MAINTENANCE PROCEDURES ............. 13 RETRIEVING STORED FAULT CODES ..................... 14 COMPONENT SELF−TEST ............................... 14 CARE AND MAINTENANCE ............................... 15 CLEANING AND/OR REPLACING AIR FILTER .............. 15 BLOWER MOTOR AND WHEEL MAINTENANCE ............ 15 CLEANING BURNERS AND FLAME SENSOR ............... 17 SERVICING HOT SURFACE IGNITER ...................... 18 FLUSHING COLLECTOR BOX AND DRAINAGE SYSTEM .... 18 CLEANING CONDENSATE DRAIN AND TRAP .............. 19 CLEANING HEAT EXCHANGERS .......................... 19 WINTERIZATION ........................................ 20 SERVICE LABEL ......................................... 21 WIRING DIAGRAM ....................................... 22 TROUBLESHOOTING − FLOW CHART .................... 23 SEQUENCE OF OPERATION ............................. 25 PARTS REPLACEMENT INFORMATION GUIDE ............ 26 PRODUCT NOMENCLATURE ............................. 27 MODELS N9MSE0401410A N9MSE0401712A N9MSE0601410A N9MSE0601714A N9MSE0801716A N9MSE0802120A N9MSE1002114A N9MSE1002120A N9MSE1202420A N9MSE1402420A Printed in U.S.A. 440 04 4402 03 12/5/2013 SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory−authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing. Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instruction

FAQs

What do the safety signal words DANGER, WARNING, CAUTION, and NOTE mean in this manual?

DANGER identifies immediate hazards resulting in severe injury or death. WARNING and CAUTION indicate hazard levels that could cause injury or property damage, while NOTE highlights suggestions that improve installation, reliability, or operation.

What does the manual require before performing startup and adjustments?

It instructs readers to follow safety codes and observe proper protective measures, and to perform the defined startup, adjustment, and safety check items listed in the table of contents.

Where can troubleshooting information be found?

Troubleshooting is provided as a dedicated flow chart section, along with a sequence of operation and wiring diagram to support diagnostics and service work.

Oct 25, 2026

Upload by Elsa