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926SB
Single-Stage, Non-Communicating, 25-Speed,
ECM Multipoise, Condensing Gas Furnace
with InteliSense™ Technology
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 1 - Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 2 - Minimum Clearances to Combustible Materials
for All Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3 - Loose Parts Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CODES AND STANDARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCE-
DURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AIR FOR COMBUSTION AND VENTILATION . . . . . . . . . . . . . . 8
Table 4 - Minimum Free Area Required for Each Combustion Air
Opening or Duct to Outdoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5 - Minimum Space Volumes for 100% Combustion, Ventila-
tion and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . . . . . . . 9
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CONDENSATE DRAIN CONNECTION . . . . . . . . . . . . . . . . . . . . 13
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 6 - Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . 18
FILTER ARANGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 7 - Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c.
(Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 8 - Filter Media Pressure Drop (Clean) Versus Face Velocity-
in. w.c. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 9 - Air Filter Selection and Duct Sizing - In. (mm) . . . . . 21
Table 10 - Air Filter Located in Filter Cabinet . . . . . . . . . . . . . . 21
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 11 - Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . 23
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 12 - Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
INTELISENSE™ TECHNOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . 27
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 13 - Vent Termination Kit for Direct Vent
(2-pipe) Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 14 - Approved Combustion-Air and Vent Pipe, Fitting
and Cement Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 15 - Maximum Equivalent Vent Length - Ft. . . . . . . . . . . 40
Table 16 - Deductions from Maximum Equivalent Vent Length - Ft.
(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 17 - Maximum Allowable Exposed Vent Lengths in Uncondi-
tioned Space Insulation Table - Ft. / M . . . . . . . . . . . . . . . . . . . . 43
Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1E, with permission of National Fire Protection Association, Quincy, MA
02269 and American Gas Association, Washington DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI
Installation, Start-up, Operating,
Service and Maintenance Instructions
38.) . . . . . . . . . . . . . . . . . . . 28
on the referenced subject, which is represented only by the standard in its entirety.
Table 18 - Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
AIR DELIVERY - CFM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 19 - Air Delivery - CFM (with filter) . . . . . . . . . . . . . . . . 48
Table 20 - Default Airflow Settings . . . . . . . . . . . . . . . . . . . . . . 52
AND NAVIGATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 21 - System Status Display Codes . . . . . . . . . . . . . . . . . . 52
Table 22 - Main Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . 53
SERVICE LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
START-UP, ADJUSTMENT, AND SAFETY CHECK . . . . . . . . . 55
Table 23 - Test Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 24 - Altitude Derate Multiplier for USA. . . . . . . . . . . . . . 58
Table 25 - Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 26 - Orifice Size and Manifold Pressure (in. w.c.) for Gas Input
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . 61
ELECTRICAL CONTROLS AND WIRING . . . . . . . . . . . . . . . . . 62
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
GAS FURNACE CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 75
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
TRAINING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
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Table of Contents
Related Manuals for Bryant 926SB
Summary of Contents for Bryant 926SB
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Page 1: Table Of Contents
926SB Single-Stage, Non-Communicating, 25-Speed, ECM Multipoise, Condensing Gas Furnace with InteliSense™ Technology Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: Read the entire instruction manual before starting the Table 18 – Hanger Spacing ......45 installation. -
Page 2: Required Notice For Massachusetts Installations
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS IMPORTANT The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA-54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: a. - Page 3 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions A210796 Fig. 1 – Dimensional Drawing Table 1 – Dimensions SHIP WT. FURNACE SIZE LB (KG) CABINET WIDTH OUTLET WIDTH BOTTOM INLET WIDTH AIR INTAKE 30040V14 14-3/16 (361) 12-1/2 (319) 12-9/16 (322) 7-1/8 (181) 124 (56.2)
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Page 4: Safety Considerations
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions SAFETY CONSIDERATIONS WARNING WARNING FIRE, INJURY, OR DEATH HAZARD Failure to follow this warning could result in property damage, personal FIRE, INJURY, OR DEATH HAZARD injury, or death. Failure to follow this warning could result in property damage, personal Do not bypass any of the safety controls in the furnace, including but injury, or death. -
Page 5: For All Units
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions 13. These furnaces SHALL NOT be installed directly on carpeting, This is the safety-alert symbol . When you see this symbol on the combustible tile, or any other combustible material other than wood furnace and in instructions or manuals, be alert to the potential for flooring. -
Page 6: Codes And Standards
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions The furnace should be sized to provide 100 percent of the design heating load requirement plus any margin that occurs because of furnace model size capacity increments. None of the furnace model sizes can be used if the heating load is 20,000 BTU or lower. -
Page 7: Dure
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions American Gas Association, 400 N. Capitol, N.W., Washington DC 3. After touching the chassis, you may proceed to service the control 20001 or connecting wires as long as you do nothing to recharge your body with static electricity (for example;... -
Page 8: Air For Combustion And Ventilation
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions AIR FOR COMBUSTION AND VENTILATION CAUTION Introduction Direct Vent (2-pipe) Applications PERSONAL INJURY AND/OR PROPERTY DAMAGE When the furnace is installed as a direct vent (2-pipe) furnace, no special HAZARD provisions for air for combustion are required. However, other gas... - Page 9 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions The requirements for combustion and ventilation air depend upon Fig. 6 illustrates how to provide TWO OUTDOOR OPENINGS, whether or not the furnace is located in a space having a volume of at...
- Page 10 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death. Many homes require air to be supplied from outdoors for furnace combustion, ventilation, and dilution of flue gases.
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Page 11: Condensate Trap
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions 2. An attic or crawlspace may be considered a space that freely To Relocate the Condensate Trap: communicates with the outdoors provided there are adequate • Orient the furnace in the downflow position. - Page 12 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions A230046 A230049 Fig. 11 – Horizontal Left Configuration (Appearance may vary) To Relocate the Condensate Trap: • Remove the knockout or plug in the casing for the condensate trap. • Install the grommet in the casing when required for direct-vent horizontal applications.
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Page 13: Condensate Drain Connection
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions CONDENSATE DRAIN CONNECTION Evaporator Coil + + + CAUTION + = Positive pressure < + = Pressure lower than areas with + − = Negative pressure Condensing Furnace PROPERTY DAMAGE HAZARD Blower creates positive pressure. - Page 14 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions For Right Side Condensate Drain: CAUTION 1. Remove the 7/8-in. knockout or plug from the right side of the casing. See Fig. 15 for suggested knockout or plug removal CUT HAZARD technique.
- Page 15 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions condensate and compatible with mineral and vegetable oils, such as canola oil. Allow at least 1/4-in. per foot (20 mm per meter) of slope down and away from the furnace in horizontal sections of drain line.
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Page 16: Installation
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions UPFLOW DOWNFLOW HORIZONTAL PERFORATED DISCHARGE DUCT 90° 90° FLANGE 120° 120° 120° A10493 A230007 Fig. 20 – Duct Flanges Fig. 18 – Horizontal Drain Trap Grommet Return Air Connections INSTALLATION WARNING NOTICE... - Page 17 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Supply Air Connections NOTE: For downflow applications, this furnace is approved for use on combustible flooring when any one of the following accessories are used: HORIZONTAL TOP RETURN NOT PERMITTED FOR • Manufacturer’s approved downflow combustible floor subbase ANY MODEL •...
- Page 18 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions the heat exchanger can be viewed for possible openings using light CAUTION assistance or a probe can be inserted for sampling the air stream. The cover attachment shall prevent leaks. MINOR PROPERTY HAZARD Connect supply-air duct to flanges on furnace supply-air outlet.
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Page 19: Filter Arangement
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions FILTER ARANGEMENT FURNACE FURNACE (OR COIL CASING WHEN USED) APPROVED COIL ASSEMBLY WARNING COIL BOX COMBUSTIBLE COMBUSTIBLE FLOORING FLOORING PLENUM OPENING FIRE, CARBON MONOXIDE AND POISONING DOWNFLOW SUBBASE HAZARD SHEET METAL PLENUM... - Page 20 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 7 – Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c. (Pa) Representative After-Market Filter Media 14 x 25 Filter Factory-Accessory Factory-Accessory (356 x 635 mm) Washable Media Fiberglass Pleated (1-in.
- Page 21 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 9 – Air Filter Selection and Duct Sizing - In. (mm) FURNACE FILTER SIZE FILTER CASING BOTTOM 4-in. † SIDE RETURN TYPE 21-in. Furnace Block Off 14-3/16 and 17-1/2-in. RETURN WIDTH...
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Page 22: Air Ducts
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions blocks, bricks or angle iron. For crawlspace installations, if the furnace is not suspended from the floor joists, the ground underneath furnace COMBUSTION - AIR PIPE must be level and the furnace set on blocks or bricks. -
Page 23: Gas Piping
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Ductwork Acoustical Treatment Left Side Gas Entry. Gas Pipe Gas Pipe Grommet Required NOTE: Metal duct systems that do not have a 90 degree elbow and 10 Grommet Required For Direct For Direct Vent Applications Vent Applications. -
Page 24: Electrical Connections
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions When a flexible connector is used, black pipe shall be installed at the A 1/8-in. (3 mm) NPT plugged tapping, accessible for test gauge furnace gas control valve and extend a minimum of 2-in. (51 mm) connection, MUST be installed immediately upstream of gas supply outside the furnace. - Page 25 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Blower door switch opens 115-V power to control. No component operation can occur. Do not bypass or close switch with blower door removed.
- Page 26 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions USA Installations: Make all electrical connections in accordance with The J-Box cover, mounting bracket and screws are shipped in the loose the current edition of the National Electrical Code (NEC) NFPA 70 and parts bag included with the furnace.
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Page 27: Intelisense™ Technology
INTELISENSE™ TECHNOLOGY the external electrical box as shown in Fig. This furnace is InteliSense capable when used with an ecobee for Bryant Power Cord Installation in Furnace J-Box smart thermostat with InteliSense technology. InteliSense technology NOTE: Power cords must be able to handle the electrical requirements allows for the collection of performance data to be sent to the cloud. -
Page 28: Accessories (See Fig. 37 And Fig. 38.)
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Temperature Display The SAT and RAT temperatures can be displayed on the control board 3 digit display. On the 3 digit display, navigate to (t°) and select F or C (Default is off). When enabled, the display will cycle through the current operating mode, SAT, RAT, and temperature differential during heating, cooling, and heat pump operation. -
Page 29: Venting
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Notes for Thermostat Drawings: VENTING SYSTEMS. Refer to the polypropylene venting system manufacturer’s installation instructions for the polypropylene venting 1. Thermostat output signals may vary. Consult thermostat installation system installation. instructions for more information. -
Page 30: (2-Pipe) Systems
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions IPEX PVC qui sont certifiées à ce standard. Au Canada, l’apprêt et le standard Canadien recommande l’inspection par un personel qualifié et ciment doivent être du même fabricant que le système d’évacuation. - Page 31 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions the exhaust gases from one appliance from contaminating the WARNING combustion air of other gas appliances. Do not take combustion air from inside the chimney when using CARBON MONOXIDE POISONING HAZARD ventilated combustion air or single-pipe vent option.
- Page 32 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions in the Air For Combustion and Ventilation Section. Do not use an pipe adapter on the furnace. See Fig. 49. This short inlet air pipe helps to abandoned chimney to supply outside air to the furnace. See Fig.
- Page 33 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions A12326 Fig. 42 – Direct Vent Termination Clearance NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations.
- Page 34 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions A12325 Fig. 43 – Ventilated Combustion Air and Non-Direct Vent Termination Clearance NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations.
- Page 35 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions No operable windows, doors or Clearance distances for intakes of any type within the items greater than 3 feet shaded areas of Wall A and B. (1 meter ) away from the...
- Page 36 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions 1. Comply with all clearance requirements stated in Fig. 42 Fig. 43 WARNING per application. 2. Termination or termination kit should be positioned where vent CARBON MONOXIDE POISONING HAZARD vapors will not damage plants/shrubs, air conditioning equipment Failure to follow the instructions outlined below for each appliance or utility meters.
- Page 37 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Size the Vent and Combustion Air Pipes combustion, as well as allow for sound attenuation. To aid sound attenuation, point the inlet air pipe away from occupants. An extra elbow General and/or five feet of pipe may be used to accomplish the sound attenuation Furnace combustion air and vent pipe connections are sized for 2-in.
- Page 38 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Recommended Combustion Air Inlet Moisture Trap NOTICE OPTIONAL CONFIGURATION FOR COMBUSTION AIR INLET PIPE In applications where there is a risk of excessive moisture entering the OPTIONAL TERMINATION BRACKET FOR 2-PIPE combustion air inlet pipe, a moisture trap may be added to the inlet pipe...
- Page 39 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions MAY NOT be used for venting the furnace. Try the next larger NOTICE diameter pipe NOTE: If the calculated Total Equivalent Vent Lengths results in ADDITIONAL INFORMATION POLYPROPYLENE different diameter pipes for the vent and combustion air, select the larger VENTING SYSTEMS diameter for both pipes.
- Page 40 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 15 – Maximum Equivalent Vent Length - Ft. NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows. Use Table 16 Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application.
- Page 41 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Combustion Air and Vent Piping Insulation Guidelines NOTE: Use closed cell, neoprene insulation or equivalent. The vent pipe may pass through unconditioned areas. The amount of Slope vent pipe back to the furnace at least ¼”...
- Page 42 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions DOWNFLOW VERTICAL Fig. 55 – Downflow Configurations (Appearance May Vary) See “Notes for Venting Options” A230011 UPFLOW VERTICAL VENT Fig. 54 – Upflow Configuration (Appearance May Vary) A11327A HORIZONTAL LEFT-VERTICAL VENT CONFIGURATION See “Notes for Venting Options”...
- Page 43 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions ALTERNATE COMBUSTION AIR CONNECTIONS A11335 Fig. 57 – Horizontal Right (Appearance May Vary) See “Notes for Venting Options” Notes for venting options Requires Internal Vent Kit See Product Data for Current Kit Number 1.
- Page 44 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Maximum Allowable Exposed Vent Length in Unconditioned Space (Metric) 40,000* BTUH 60,000 BTUH Unit Size 3/8-in. 1/2-in. Uninsulated Uninsulated 3/8-in. Insulation 1/2-in. Insulation Insulation Insulation Winter Pipe Dia. Design Temp 6.1 15.2 13.7 6.1 18.3 15.2...
- Page 45 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions 14. Wipe excess cement from joint. A continuous bead of cement will WARNING be visible around perimeter of a properly made joint. 15. Handle pipe joints carefully until cement sets. CARBON MONOXIDE POISONING HAZARD 16.
- Page 46 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Concentric Vent 2-Pipe and 1-Pipe Vent Termination Single or multiple concentric vent must be installed as shown in Fig. NOTE: Follow the instructions of the vent terminal manufacturer. These Maintain the required separation distance between vents or pairs of vents instructions are provided as a reference, only.
- Page 47 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Venting System Length Calculations The Total Equivalent Vent Length (TEVL) for EACH combustion air or vent pipe equals the length of the venting system, plus the equivalent length of elbows used in the venting system from Table Standard vent terminations or factory accessory concentric vent terminations count for zero deduction.
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Page 48: Air Delivery - Cfm
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions AIR DELIVERY - CFM Table 19 – Air Delivery - CFM (with filter) Airflow External Static Pressure (in. w.c.) Unit Size Default Setting Setting Cont. Fan 30040V14 Heating Low Cooling 1035 1010... - Page 49 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 19 – Air Delivery - CFM (with filter) (Continued) Airflow External Static Pressure (in. w.c.) Unit Size Default Setting Setting Cont. Fan 36060V14 Heating/ Low Cooling 1035 1005 1055 1025 1090...
- Page 50 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 19 – Air Delivery - CFM (with filter) (Continued) Airflow External Static Pressure (in. w.c.) Unit Size Default Setting Setting Cont. Fan 1015 1050 1005 1075 1035 1150 1110 1075 1035...
- Page 51 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 19 – Air Delivery - CFM (with filter) (Continued) Airflow External Static Pressure (in. w.c.) Unit Size Default Setting Setting Cont. Fan 1025 1130 1065 1000 1225 1165 1105 1045 1310...
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Page 52: Furnace Control Programming
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 20 – Default Airflow Settings Designated Airflow Settings Default Airflow Settings Unit Size Heating High Cooling Low Cooling Heating Const. Fan 30040V14 (9 - 15) (1 - 3) 36040V17 (5 - 10) - Page 53 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 22 – Main Menu Options Display Menu Item Idle/Stand by Mode ,... Displays the current furnace operating mode or active fault code. Faults code menu stores the 7 latest faults in memory. If no faults, None (...
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Page 54: Service Label
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions A221506 Fig. 59 – 3 Digit Display Flow Chart SERVICE LABEL A230314 Fig. 60 – Service Label Information Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. -
Page 55: Start-Up, Adjustment, And Safety Check
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions START-UP, ADJUSTMENT, AND SAFETY CAUTION CHECK General CUT HAZARD Failure to follow this caution may result in personal injury. CAUTION Sheet metal parts may have sharp edges or burrs. Use care and wear... -
Page 56: Wiring Diagram
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions WIRING DIAGRAM A221529 Fig. 61 – Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. -
Page 57: Adjustments
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Prime Condensate Trap with Water WARNING WARNING FIRE OR EXPLOSION HAZARD CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Failure to follow these warnings could result in personal injury or death. - Page 58 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Heating value = 1050 Btu/cu ft. NOTICE Specific gravity = 0.62 Therefore: Orifice No. 44 The NATURAL GAS manifold pressure adjustments in Table 26 * Furnace is shipped with No. 44 orifices. In this example, all main compensate for BOTH altitude AND gas heating value.
- Page 59 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions g. Jumper R and W thermostat connections on control to start Table 25 – Gas Rate (CU ft./hr) furnace, see Fig. SIZE OF TEST DIAL SIZE OF TEST DIAL SEC. SEC. h. Remove regulator adjustment cap from gas valve pressure...
- Page 60 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Table 26 – Orifice Size and Manifold Pressure (in. w.c.) for Gas a. Turn gas valve ON/OFF switch to OFF. Input Rate b. Remove water column manometer or similar device from manifold pressure tap.
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Page 61: Service And Maintenance Procedures
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions values, relocate SAT sensor farther away from furnace or after a bend in b. Gradually block off return air with a piece of cardboard or sheet the ductwork. metal until the limit trips. -
Page 62: Electrical Controls And Wiring
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions replacement is required, use ONLY a 3-amp. fuse. The control LED will CAUTION display status code (24.1) when fuse needs to be replaced. Proper instrumentation is required to service electrical controls. The... - Page 63 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Consult your local dealer about proper frequency of maintenance and the internal filter with this furnace. See “Filter Arrangement” under the availability of a maintenance contract. “Installation” section of this manual. NOTE: If the filter has an airflow direction arrow, the arrow must point WARNING toward the blower.
- Page 64 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions f. After servicing the blower, reverse steps a through e, resealing combustion air pipe per installation instructions. g. Tighten all clamps 15 lb -in. Fig. 66 For Steps 5 through 14. TORQUE THE BLOWER WHEEL SET SCREW 5.
- Page 65 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions b. Verify blower is rotating in the correct direction 14. Remove wires from both rollout switches. 18. If furnace is operating properly, RELEASE BLOWER DOOR 15. Slide one-piece burner out of slots on sides of burner assembly.
- Page 66 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions Flushing Collector Box and Drainage System WARNING ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Turn off the gas and electrical supplies to the furnace and install lockout tag before performing any maintenance or service.
- Page 67 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions 13. Clean port on collector box with a small wire. WARNING To re-install Condensate Drain and Trap: 1. Remove adhesive backing from condensate trap gasket ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD 2. Install gasket on collector box Failure to follow this warning could result in personal injury or death, 3.
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Page 68: Winterization
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions 10. Repeat Steps 5 through 8. WARNING 11. If a condensate pump is used, check with pump manufacturer to verify pump is safe for use with antifreeze used. Allow pump to FIRE OR EXPLOSION HAZARD start and pump anti-freeze to open drain. - Page 69 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions is energized. When the thermostat is satisfied, the R-to-G-and-Y circuit are opened. Simultaneously, the electronic air cleaner terminal EAC-1 is The outdoor unit stops, and the furnace blower BLWM and electronic air...
- Page 70 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions When the thermostat “calls for low-cooling”, the blower motor BLWM will switch to operate at low-cooling airflow. When the thermostat is satisfied, the blower motor BLWM will operate an additional 90 seconds at low-cooling airflow before transitioning back to continuous-blower airflow.
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Page 71: Troubleshooting
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions TROUBLESHOOTING A221600 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. - Page 72 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions A230204 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 73 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions A221602 Fig. 71 – Troubleshooting Guide Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Page 74: Gas Furnace Checklist
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions GAS FURNACE CHECKLIST GAS FURNACE CHECKLIST Installation Date: ____________________________ Furnace Thermostat Humidifier Indoor Coil Outdoor Unit Furnace Location_____________________________ Furnace Orientation: ____Upflow ____Downflow ____Horizontal Right ____Horizontal Left Gas Adjustment LOCAL GAS HEAT CONTENT_____________(btu/cu. ft.) -
Page 75: Parts Replacement Information Guide
926SB: Installation, Start-up, Operating, Service and Maintenance Instructions PARTS REPLACEMENT INFORMATION GUIDE Casing Group Media Cabinet (when used) Gas Control Group Blower door Bottom plate Burner Control door Flame sensor Door knob assembly Gas valve Top filler plate Hot surface igniter... - Page 76 926SB: Installation, Start-up, Operating, Service and Maintenance Instructions © 2023 Carrier. All rights reserved. Edition Date: 03/23 Catalog No: II926SB-01 A Carrier Company Replaces: NEW Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.