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
Save this manual for future reference.
Safety Labeling and Signal Words
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WARNING,
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R9MSB
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
R9MSB0601716A
R9MSB0801716A
R9MSB1002122A
R9MSB1202422A
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 6000 00
8/05/13
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Table of Contents
Related Manuals for International comfort products R9MSB0601716A
Summary of Contents for International comfort products R9MSB0601716A
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Page 1: Table Of Contents
START-UP , ADJUSTMENT, AND SAFETY CHECK ..R9MSB0601716A GENERAL ........ - 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.
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Page 3: Start-Up , Adjustment, And Safety Check
START−UP, ADJUSTMENT, AND SAFETY 6. Pour one quart (liter) of water into funnel/tube. Water should run through collector box, overfill condensate CHECK trap, and flow into open field drain. General 7. Remove funnel and tube from collector box and replace collector box drain plug. 1. -
Page 4: Check Inlet Gas Pressure
The gas input rate on rating plate is for installations at Specific gravity = 0.62 altitudes up to 2000 ft. (609.6M). Therefore: Orifice No. 44 (Furnace is shipped with No. 44 orifices. In this example, all NOTICE main burner orifices are the correct size and do not need to be changed to obtain proper input rate.) Manifold pressure: 3.4-in. - Page 5 required input from Step 1, increase manifold NOTICE pressure to increase input or decrease manifold pressure to decrease input. Repeat steps b through e until correct input is achieved. Re−install regulator DO NOT set low−heat manifold pressure less than 2.8−in. seal cap on gas valve.
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Page 6: Adjust Temperature Rise
Adjust Temperature Rise Change the blower speed taps as required to maintain proper temperature rise for Heating and Cooling as Blower door must be installed when taking NOTE: described above. To change blower motor speed selections temperature rise reading. Leaving blower door off will result for heating mode, remove blower motor lead from control in incorrect temperature measurements, due to possible HEAT terminal(s). -
Page 7: Checklist
d. Burners will re−light when furnace cools down. SINGLE-STAGE 2. Check Pressure Switch(es) This control proves operation of the draft inducer ON/OFF Switch blower. 1/2” NPT Inlet a. Turn off 115−v power to furnace. Regulator Seal Cap b. Disconnect inducer motor lead wires from wire Regulator Adjustment Regulator Seal Cap under Cap harness. -
Page 8: Gas Rate)
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 9 338309-201 Rev. E A11602 Figure 5 − Service Label Information Specifications subject to change without notice. 440 04 6000 00...
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Page 10: 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 11: Service And Maintenance Procedures
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 12: Pressure Switches
Electrical Controls and Wiring Troubleshooting Refer to the service label. (See Figure 5—Service Label.) Pressure Switches The Troubleshooting Guide (See Figure 15) can be a useful Each pressure switch is labeled with the reference location tool in isolating furnace operation problems. Beginning with (noted as “COLLECTOR BOX−LPS”... - Page 13 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 14 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 15 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 16 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 17 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.
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Page 18: Cleaning Heat Exchangers
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 19 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 20 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 21 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 6000 00...
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Page 22: 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 23 A12421 Figure 15 − Troubleshooting Guide Specifications subject to change without notice. 440 04 6000 00...
- Page 24 A11440 Troubleshooting Guide (Cont) 440 04 6000 00 Specifications subject to change without notice.
- Page 25 339236−2 Rev A Figure 16 − Wiring Diagram Specifications subject to change without notice. 440 04 6000 00...
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Page 26: 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. 440 04 6000 00 Specifications subject to change without notice. Copyright 2013 International Comfort Products...