ICP N9MSB Series Service And Technical Support Manual
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ICP N9MSB Series Service And Technical Support Manual

ICP N9MSB Series Service And Technical Support Manual

Single stage, psc blower motor 35” tall, high efficiency condensing gas furnace
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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

START−UP CHECK SHEET FOR PSC MOTOR
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CHECKLIST
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PRODUCT NOMENCLATURE
Printed in U.S.A.
SERVICE AND TECHNICAL
SUPPORT MANUAL
Single Stage, PSC Blower Motor
Save this manual for future reference.
Safety Labeling and Signal Words
DANGER,
WARNING,
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N9MSB
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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MODELS
N9MSB0401410
N9MSB0401712
N9MSB0601412
N9MSB0601716
N9MSB0801716
N9MSB0802120
N9MSB1002116
N9MSB1002120
N9MSB1202420
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 4413 03
10/15/2018

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Summary of Contents for ICP N9MSB Series

  • Page 1: Table Of Contents

    SERVICE AND TECHNICAL SUPPORT MANUAL Single Stage, PSC Blower Motor 35” Tall, High Efficiency Condensing Gas Furnace N9MSB Save this manual for future reference. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE Signal Words in Manuals signal words DANGER, WARNING, The signal word WARNING is used throughout...
  • Page 2 SAFETY CONSIDERATIONS WARNING I m p r o p e r i n s t a l l a t i o n , a d j u s t m e n t , a l t e r a t i o n , s e r v i c e , maintenance, or use can cause explosion, fire, electrical shock, PERSONAL INJURY, AND/OR PROPERTY DAMAGE or other conditions which may cause death, personal injury, or...
  • Page 3 SERVICE AND TECHNICAL MANUAL Gas Furnace: N9MSB START−UP CHECK SHEET For PSC Models N9MSB (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...

  • Page 4: Start−Up, Adjustment, And Safety Check

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 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: N9MSB Adjustments NOTICE WARNING The NATURAL GAS manifold pressure adjustments in Table 3 compensate for BOTH altitude AND gas heating value. DO FIRE HAZARD NOT apply an additional de−rate factor to the pressures shown Failure to follow this warning could result in personal injury, in Table 3.
  • Page 6 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 5. Check and verify burner orifice size in furnace. NEVER 4. Turn on furnace power supply. ASSUME ORIFICE SIZE. ALWAYS CHECK AND 5. Turn gas supply manual shutoff valve to ON position. VERIFY.
  • Page 7 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 2. Verify natural gas input rate by clocking meter. Automatic Gas Valve (Single Stage) Figure 3 NOTE: Contact your HVAC distributor or gas supplier for metric without Tower Pressure Ports gas meter Tables, if required. ON/OFF Switch a.
  • Page 8 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 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 9 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 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 10 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 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...

  • Page 11: Adjust Temperature Rise

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 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 12: Adjust Blower Off Delay (Heat Mode)

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB (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 13 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB Checklist 6. 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 14: Cooling Air Delivery - Cfm

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB Table 5 COOLING AIR DELIVERY - CFM (with filter WIRE COOL TEST AIRFLOW DELIVERY @ VARIOUS EXTERNAL STATIC PRESSURES RETURN AIR SIZE LEAD CONNECTION COLOR TONS /TON Black 1145 1100 1060 1015 Blue 401410 SIDE/BOTTOM...

  • Page 15: Service And Maintenance Procedures

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB SERVICE AND MAINTENANCE Figure 6 Multipoise Orientations PROCEDURES Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. A qualified service person should inspect the furnace once a year.

  • Page 16: Retrieving Stored Fault Codes

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB Troubleshooting Proper instrumentation is required to service electrical controls. The control in this furnace is equipped with a Status Code LED Refer to the service label. (See Figure 14—Service Label) (Light−Emitting Diode) to aid in installation, servicing, and The Troubleshooting Guide −...

  • Page 17: Care And Maintenance

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB c. After 7 seconds the hot surface igniter is energized for CAUTION 15 sec., then off. d. Blower motor operates on HEAT speed for 10 sec. CUT HAZARD e. Blower motor operates on COOL speed for 10 sec. Failure to follow this caution may result in personal f.

  • Page 18: Blower Motor And Wheel Maintenance

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 4. If equipped with permanent, washable filter, clean filter by c. Mark blower wheel orientation and cutoff plate spraying cold tap water through filter in opposite direction location to ensure proper reassembly. of airflow.

  • Page 19: Cleaning Burners And Flame Sensor

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB NOTE: If R−W/W1 thermostat terminals are jumpered at the Blower Assembly (cont.) time blower door switch is closed, blower will run for 90 sec before beginning a heating cycle. a. Perform component self−test as shown at the bottom of the SERVICE label, located on the blower door.

  • Page 20: Servicing Hot Surface Igniter

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 18. Check igniter resistance. Nominal resistance is 40 to 70 Figure 11 Igniter Position − Side View ohms at room temperature and is stable over the life of the igniter. 19. Clean burner with a brush and a vacuum. 20.

  • Page 21: Flushing Collector Box And Drainage System

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 4. Check igniter resistance. Igniter resistance is affected by 12. Clean the relief port on collect box and the trap with a temperature. Only check resistance when the igniter is at small wire. Shake any water out of the tube. room temperature.

  • Page 22: Cleaning Heat Exchangers

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 1. Check for signs of physical damage to heat tape such as Figure 13 Burner Flame nicks, cuts, abrasions, gnawing by animals, etc. 2. Check for discolored heat tape insulation. If any damage Burner Flame or discolored insulation is evident, replace heat tape.
  • Page 23 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 2. Turn off gas and electrical supplies to your furnace. 10. Repeat Steps 5 through 8. 3. Remove furnace control door. 11. If a condensate pump is used, check with pump manufacturer to verify pump is safe for use with 4.

  • Page 24: Service Label

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB Figure 14 Service Label 338310−2 Rev F 440 04 4413 03 Specifications subject to change without notice.

  • Page 25: Wiring Diagram

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB Figure 15 Wiring Diagram 339241−2 Rev A 440 04 4413 03 Specifications subject to change without notice.

  • Page 26: Troubleshooting Guide − Flow Chart

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB Figure 16 Troubleshooting Guide − Flow Chart 440 04 4413 03 Specifications subject to change without notice.
  • Page 27 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB Figure 16 (CONT.) Troubleshooting Guide − Flow Chart L12F045 440 04 4413 03 Specifications subject to change without notice.

  • Page 28: Sequence Of Operation

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB SEQUENCE OF OPERATION period. The blower motor BLWM and air cleaner terminal EAC will remain energized for 90, 120, 150, or 180 NOTE: Furnace control must be grounded for proper operation seconds (depending on the heat−OFF delay selection). or control will lock out.

  • Page 29: Parts Replacement Information Guide

    SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 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 30 SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: N9MSB 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 FEATURE...

This manual is also suitable for:

N9msb0401410N9msb0401712N9msb0601412N9msb0601716N9msb0801716N9msb0802120 ... Show all

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