International comfort products R9MSB Service And Technical Support Manual
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International comfort products R9MSB Service And Technical Support Manual

International comfort products R9MSB Service And Technical Support Manual

Single stage, psc blower motor 35” tall, high efficiency condensing gas furnace
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SERVICE AND TECHNICAL SUPPORT
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.
MANUAL
Single Stage, PSC Blower Motor
R9MSB0801716 (A Series Only)
R9MSB (All B 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.
3
R9MSB0601716B
3
R9MSB0801716A
3
R9MSB0801716B
3
R9MSB1002120B
3
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R9MSB1202420B
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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 6601 01
12/5/2014

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  • Page 1: Table Of Contents

    MANUAL Single Stage, PSC Blower Motor 35” Tall, High Efficiency Condensing Gas Furnace R9MSB0801716 (A Series Only) R9MSB (All B Series) Save this manual for future reference. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE Signal Words in Manuals...
  • Page 2 SAFETY CONSIDERATIONS WARNING Improper ins t allation, adjus t ment, alteration, serv ic e, PERSONAL INJURY, AND/OR PROPERTY DAMAGE maintenance, or use can cause explosion, fire, electrical shock, HAZARD or other conditions which may cause death, personal injury, or Failure to carefully read and follow this warning could property damage.

  • Page 3: Start−Up, Adjustment, And Safety Check

    START−UP, ADJUSTMENT, AND SAFETY Prime Condensate Trap with Water CHECK WARNING NOTICE CARBON MONOXIDE POISONING HAZARD Failure to follow these warnings could result in personal IMPORTANT INSTALLATION START−UP injury or death. PROCEDURES Failure to use a properly configured trap or NOT Failure to follow this procedure may result in a nuisance water-priming trap before operating furnace may allow smoke or odor complaint.

  • Page 4: Check Inlet Gas Pressure

    Tables have been provided in the furnace installation CAUTION instructions to match the required orifice to the manifold pressure to the heat content and specific gravity of the gas. To do this: FURNACE DAMAGE HAZARD 1. Obtain average yearly gas heat value (at installed Failure to follow this caution may result in reduced altitude) from local gas supplier.

  • Page 5: Adjust Manifold Pressure

    11. Turn gas supply manual shutoff valve to OFF i. Remove jumper R to W. position. j. Reinstall manifold pressure tap plug from gas valve. 12. Turn off furnace power supply. 2. Verify natural gas input rate by clocking meter. 13.

  • Page 6: Adjust Temperature Rise

    TWINNING AND/OR COMPONENT TEST BLOWER OFF-DELAY TERMINAL J2 JUMPER BLOWER OFF-DELAY HUMIDIFIER TERMINAL (24-VAC 0.5 AMP MAX.) 24-V THERMOSTAT TERMINALS TRANSFORMER 24-VAC CONNECTIONS TEST/TWIN 0.5 AMP@24VAC 3-AMP FUSE FUSE 3-AMP SEC-2 SEC-1 LED OPERATION & EAC-2 DIAGNOSTIC LIGHT PL1-LOW VOLTAGE MAIN HARNESS CONNECTOR 115-VAC(L2)NEUTRAL CONNECTIONS...

  • Page 7: Adjust Blower Off Delay (Heat Mode)

    3. Record amp. draw across terminals when furnace is WARNING in low heat and after blower starts. 4. Set heat anticipator on thermostat per thermostat instructions and install on sub-base or wall. ELECTRICAL OPERATION HAZARD 5. Install blower access door. Failure to follow this warning could result in personal Electronic thermostat: Set cycle rate for 3 cycles per hr.

  • Page 8: Altitude Derate Multiplier For U.s.a

    Table 2 – Altitude Derate Multiplier for U.S.A. THERMOSTAT SUBBASE ALTITUDE PERCENT DERATE TERMINALS WITH THERMOSTAT REMOVED MULTIPLIER (ANITICIPATOR, CLOCK, ETC., DERATE FACTOR* MUST BE OUT OF CIRCUIT.) 0–2000 0−610 1.00 HOOK-AROUND 2001–3000 610−914 4−6 0.95 AMMETER 3001–4000 914−1219 6−8 0.93 4001–5000 1219−1524...

  • Page 9: Gas Rate (Cu Ft./Hr)

    Table 3 – 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. 5 Cu Ft. 1800 1636 1500...
  • Page 10 338309-201 Rev. E A11602 Figure 5 − Service Label Information 440 04 6601 01 Specifications subject to change without notice.

  • Page 11: Orifice Size And Manifold Pressure

    Table 4 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate SINGLE-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE RANGE HEAT VALUE 0.58 0.60 0.62 0.64 AT ALTITUDE Orifice Manifold Orifice...

  • Page 12: Orifice Size And Manifold Pressure

    Table 4 − Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate (Cont.) SINGLE-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE RANGE HEAT VALUE 0.58 0.60 0.62 0.64 AT ALTITUDE Orifice Manifold...

  • Page 13: Service And Maintenance Procedures

    NOTES: 1. A filter is required for each return−air inlet. Airflow performance includes a 3/4 in. (19 mm) washable filter media such as contained in factory− authorized accessory filter rack. See accessory list. To determine airflow performance without this filter, assume an additional 0.1 in.
  • Page 14 flashing, or a code composed of 2 digits. The first digit is the 1. Leave 115-v power connected to furnace. number of short flashes, the second digit is the number of 2. Observe the status LED through the blower door (the long flashes.
  • Page 15 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 208/230- OR BLOWER DOOR SWITCH 460-V THREE PHASE 208/230-V SINGLE PHASE AUXILIARY 115-V FIELD- J-BOX SUPPLIED NOTE 1 DISCONNECT CONDENSING...
  • Page 16 Care and Maintenance 3. Check electrical connections for tightness and controls for proper operation each heating season. WARNING Service as necessary. 4. Inspect burner compartment before each heating season for rust, corrosion, soot or excessive dust. If FIRE OR EXPLOSION HAZARD necessary, have furnace and burner serviced by a Failure to follow this warning could result in personal qualified service agency.
  • Page 17 Blower Motor and Wheel Maintenance 8. Reassemble motor and blower wheel by reversing items 7b through 7f. Ensure wheel is positioned for To ensure long life, economy, and high efficiency, clean proper rotation. accumulated dirt and grease from blower wheel and motor 9.
  • Page 18 of light dirt or dust, they may be cleaned by using the 5. Insert the orifices in the support rings of the burners. following procedure: NOTE: If manifold does not fit flush against the burner, do NOTE: Use a back-up wrench on the gas valve to prevent not force the manifold on the burner assembly.

  • Page 19: Cleaning Heat Exchangers

    c. Inspect igniter for signs of damage or failure. 5. Disconnect external drain from condensate drain d. If replacement is required, remove the screw that elbow or drain extension pipe inside the furnace and secures the igniter on igniter bracket and remove the set aside.
  • Page 20 Primary Heat Exchangers WARNING If the heat exchangers get an accumulation of light dirt or dust on the inside, they may be cleaned by the following procedure: FIRE OR EXPLOSION HAZARD NOTE: If the heat exchangers get a heavy accumulation of Failure to follow this warning could result in personal soot and carbon, both the primary and secondary heat injury, death, and/or property damage.
  • Page 21 11. If a condensate pump is used, check with pump manufacturer to verify pump is safe for use with antifreeze used. Allow pump to start and pump anti− freeze to open drain. 12. Replace main door. 13. When furnace is re−started, flush condensate pump with clear water to check for proper operation before re−starting furnace.
  • Page 22 GROMMET MOTOR SHAFT FLAT MOTOR ARM SCREW SET SCREW MOTOR WHEEL HUB SEE DETAIL SCREW LOCATION BLO HSG ASSY BRACKET BRACKET ENGAGEMENT DETAIL CUTOFF, BLOWER WHEEL, BLOWER BLOWER HSG ASSY BRACKET CAPACITOR OR POWER CHOKE (WHEN USED) MOTOR, BLOWER SCREW (GND) A11584 Figure 13 −...
  • Page 23 IGNITER BURNER SUPT. ASSY BRACKET, IGNITER BURNER ASSY FLAME ROLLOUT SWITCH FLAME SENSOR (BELOW BURNER) A11403 Figure 14 − Burner Assembly Specifications subject to change without notice. 440 04 6601 01...

  • Page 24: Sequence Of Operation

    SEQUENCE OF OPERATION EAC−1 is energized and remains energized as long as the blower motor BLWM is energized. NOTE: Furnace control must be grounded for proper f. Blower−Off Delay− When the thermostat is operation or control will lock out. Control is grounded satisfied, the R−to−W circuit is opened, de−...
  • Page 25 A12421 Figure 15 − Troubleshooting Guide Specifications subject to change without notice. 440 04 6601 01...
  • Page 26 A11440 Troubleshooting Guide (Cont) 440 04 6601 01 Specifications subject to change without notice.
  • Page 27 339236−2 Rev A Figure 16 − Wiring Diagram Specifications subject to change without notice. 440 04 6601 01...

  • Page 28: Parts Replacement Information Guide

    SALES (MAJOR) REVISION DIGIT ENGINEERING (MINOR) REVISION DIGIT Have available the product/model number and the serial number located on the unit rating plate to ensure correct replacement parts. Copyright 2014 International Comfort Products 440 04 6601 01 Specifications subject to change without notice.

This manual is also suitable for:

R9msb0801716R9msb0601716bR9msb0801716aR9msb0801716bR9msb1002120bR9msb1202420b

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