Table of Contents
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35" Tall, High Efficiency Condensing Gas Furnace
DANGER, WARNING, CAUTION, and NOTE
The
signal
words
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.
TABLE OF CONTENTS
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Printed in U.S.A.
SERVICE AND TECHNICAL
SUPPORT MANUAL
Single Stage, PSC Blower Motor
N9MSE (A Series)
Save this manual for future reference.
Safety Labeling and Signal Words
DANGER,
WARNING,
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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.
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N9MSE0401410A
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N9MSE0401712A
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N9MSE0601410A
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N9MSE0601714A
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N9MSE0801716A
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N9MSE0802120A
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N9MSE1002114A
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N9MSE1002120A
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N9MSE1202420A
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N9MSE1402420A
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MODELS
Use of the AHRI Certified TM Mark indicates a
manufacturer's participation in the program.
For verification of certification for individual
products, go to www.ahridirectory.org .
440 04 4402 03
12/5/2013
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Table of Contents
Related Manuals for ICP N9MSE0401712A
Summary of Contents for ICP N9MSE0401712A
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Page 1: Table Of Contents
ADJUST TEMPERATURE RISE ......N9MSE0401712A ADJUST BLOWER OFF DELAY (HEAT MODE) .... - Page 2 SAFETY CONSIDERATIONS WARNING Improper ins t allation, adjus t ment, alteration, serv ic e, maintenance, or use can cause explosion, fire, electrical shock, PERSONAL INJURY, AND/OR PROPERTY or other conditions which may cause death, personal injury, or DAMAGE HAZARD property damage. Consult a qualified installer, service agency, Failure to carefully read and follow this warning could or your distributor or branch for information or assistance.
- Page 3 SERVICE AND TECHNICAL MANUAL Gas Furnace: N9MSE START−UP CHECK SHEET For PSC Models N9MSE (This sheet is optional. Keep for future reference.) Date of Start−Up: Calculated Input (BTU) Rate: (See Checks and Adjustments Section). Dealer Name: Heating Check Address: Measured Line Pressure During Heat: City, State(Province), Zip or Postal Code: Measured Manifold Pressure: Heat...
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Page 4: Start−Up, Adjustment, And Safety Check
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE START−UP, ADJUSTMENT, AND SAFETY 2. Connect field-supplied 5/8-in. (16 mm) ID tube with attached funnel (see Figure 1) to upper collector box CHECK drain connection. 3. Pour one quart (liter) of water into funnel/tube. Water NOTICE should run through collector box, overfill condensate trap, and flow into open field drain. - Page 5 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE To adjust manifold pressure to obtain the proper input rate, first, CAUTION determine if the furnace has the correct orifice installed. At higher altitudes or different gas heat contents, it may be FURNACE DAMAGE HAZARD necessary to change the factory orifice to a different orifice.
- Page 6 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Check Inlet Gas Pressure i. Remove jumper R to W. Redundant Automatic Gas Valve The inlet gas pressure must be checked with the furnace Figure 3 (Single Stage) operating in maximum heat. This is necessary to make sure the inlet gas pressure does not fall below the minimum pressure of ON/OFF Switch 4.5 in.
- Page 7 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Figure 4 Example of Single Stage Furnace Control for PSC Blower Motor HEAT COMPONENT TEST J2 JUMPER OFF−DELAY TERMINAL 24−V THERMOSTAT TERMINALS HUMIDIFIER TERMINAL (24−VAC 0.5 AMP MAX) 24VAC TRANSFORMER 24−VAC CONNECTIONS 3−AMP FUSE COM/BLUE 24VAC/RED...
- Page 8 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Table 2 Gas Rate (CU ft./hr) SIZE OF TEST DIAL SIZE OF TEST DIAL SECONDS SECONDS FOR 1 REVOLUTION FOR 1 REVOLUTION 1 Cu Ft. 2 Cu Ft. 5 Cu Ft. 1 Cu Ft. 2 Cu Ft.
- Page 9 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Table 3 Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate − Single Stage SINGLE-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE RANGE HEAT VALUE...
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Page 10: Adjust Temperature Rise
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Table 3 (CONT.) Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate − Single Stage SINGLE-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE RANGE HEAT VALUE... -
Page 11: Adjust Blower Off Delay (Heat Mode)
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE (Read following caution before changing taps.) Figure 5 Amp. Draw Check with Ammeter CAUTION THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED UNIT DAMAGE HAZARD (ANITICIPATOR, CLOCK, ETC., To avoid operating outside the rise range and avoid MUST BE OUT OF CIRCUIT.) component damage: HOOK-AROUND... -
Page 12: Checklist
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Checklist 5. Verify that the Status LED heartbeat (bright−dim). If not, check that the power supply is energized and that the 1. Put away tools and instruments. Clean up debris. blower door is secure. See Figure 14 to interpret 2. -
Page 13: Service And Maintenance Procedures
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE SERVICE AND MAINTENANCE General PROCEDURES These instructions are written as if the furnace is installed in an upflow application. An upflow furnace application is where the Untrained personnel can perform basic maintenance functions blower is located below the combustion and controls section of such as cleaning and replacing air filters. -
Page 14: Retrieving Stored Fault Codes
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Figure 7 Heating and Cooling Application Wiring Diagram − Single−Stage Thermostat FIELD 24-V WIRING FIELD 115-, 208/230-, 460-V WIRING FACTORY 24-V WIRING FACTORY 115-V WIRING NOTE 2 THERMOSTAT FIVE WIRE FIELD-SUPPLIED TERMINALS DISCONNECT THREE-WIRE HEATING-ONLY... -
Page 15: Care And Maintenance
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Care and Maintenance 3. Check electrical connections for tightness and controls for proper operation each heating season. Service as necessary. WARNING 4. Inspect burner compartment before each heating season for rust, corrosion, soot or excessive dust. If necessary, FIRE OR EXPLOSION HAZARD have furnace and burner serviced by a qualified service agency. - Page 16 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE 2. Remove blower door. Figure 8 Blower Assembly 3. All factory wires can be left connected, but field MOTOR SHAFT FLAT thermostat and accessory wiring may need to be disconnected depending on their length and routing. 4.
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Page 17: Cleaning Burners And Flame Sensor
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE 14. Reinstall 2 screws securing blower assembly to blower 1. Disconnect power at external disconnect, fuse or circuit deck. breaker. 15. Reconnect blower leads to furnace control. Refer to 2. Turn off gas at external shut-off or gas meter. furnace wiring diagram, and connect thermostat leads if 3. -
Page 18: Servicing Hot Surface Igniter
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE 5. Insert the orifices in the support rings of the burners. 15. Turn gas on at electric switch on gas valve and at external shut-off or meter NOTE: If manifold does not fit flush against the burner, do not 16. -
Page 19: Cleaning Condensate Drain And Trap
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE 6. Flush inside of collector box with water until discharge 9. Turn gas on at electric switch on gas valve and at water from condensate trap is clean and runs freely. external shut-off or meter 7. -
Page 20: Winterization
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Secondary Heat Exchangers Figure 12 Cleaning Heat Exchanger Cell The condensing side (inside) of the secondary heat exchanger CANNOT be serviced or inspected without complete removal of the heat exchanger assembly. Detailed information on heat exchanger removal can be obtained from your Distributor. -
Page 21: Service Label
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Figure 14 Service Label 338310−2 Rev F 440 04 4402 03 Specifications subject to change without notice. -
Page 22: Wiring Diagram
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Figure 15 Wiring Diagram 339241−2 Rev A 440 04 4402 03 Specifications subject to change without notice. -
Page 23: Troubleshooting − Flow Chart
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Figure 16 Troubleshooting − Flow Chart 440 04 4402 03 Specifications subject to change without notice. - Page 24 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE Figure 16 (CONT.) Troubleshooting − Flow Chart L12F045 440 04 4402 03 Specifications subject to change without notice.
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Page 25: Sequence Of Operation
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE SEQUENCE OF OPERATION EAC will remain energized for 90, 120, 150, or 180 seconds (depending on the heat−OFF delay selection). NOTE: Furnace control must be grounded for proper operation The furnace control CPU is factory−set for a or control will lock out. -
Page 26: Parts Replacement Information Guide
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE PARTS REPLACEMENT INFORMATION GUIDE Casing Group Gas Control Group Control door Manifold Blower door Burner Top filler plate Orifice Bottom filler plate Flame sensor Door knob assembly Hot surface igniter Gas valve Electrical Group Heat Exchanger Group Control box... -
Page 27: Product Nomenclature
SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSE PRODUCT NOMENCLATURE DIGIT POSITION 6, 7, 8 9, 10 11, 12 G = Mainline Look 1 F = Mainline Look 2 N = Entry 9 = 90% − 100% EFFICIENCY M = Multiposition H = Horizontal U = Upflow D = Downflow...