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987TA
Two-Stage, Variable-Speed, Multipoise
35 in. (889 mm) Tall, Condensing Gas Furnace
Installation, Start-up, Operating, Service and Maintenance
NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS2
Table 1 – Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
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
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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,
Ventilation and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . 10
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Condensate Drain Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 6 – Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . . 19
Filter Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 7 – Optional Filter Media Pressure Drop (Clean) Versus
Airflow - in. w.c. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 8 – Optional Filter Media Pressure Drop (Clean) Versus
Face Velocity- in. w.c. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 9 – Air Filter Selection and Duct Sizing - In. (mm) . . . . . . 22
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 10 – Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . . 24
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 11 – Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
115-V Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
24-V Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
TEMPERATURE SENSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Accessories (See
Fig. 38
and
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 12 – Vent Termination Kit for Direct Vent (2-pipe) Sys-
tems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 13 – Approved Combustion-Air and Vent Pipe, Fitting
and Cement Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 14 – Maximum Equivalent Vent Length . . . . . . . . . . . . . . . 41
Table 15 – Deductions from Maximum Equivalent Vent Length
- Ft. (M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 16 – Maximum Allowable Exposed Vent Lengths in Un-
conditioned Space Insulation Table - Ft./M. . . . . . . . . . . . . . . . . . 44
Table 17 – Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Air Delivery (CFM) with Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Fig.
39) . . . . . . . . . . . . . . . . . . . . . . . . 28
Instructions
Table 18 – 48060V17 Airflow in CFM . . . . . . . . . . . . . . . . . . . . . 49
Table 19 – 48080C17 Airflow in CFM . . . . . . . . . . . . . . . . . . . . . 49
Table 20 – 60080C21 Airflow in CFM . . . . . . . . . . . . . . . . . . . . . 50
Table 21 – 66100C21 Airflow in CFM . . . . . . . . . . . . . . . . . . . . . 50
Table 22 – 66120C24 Airflow in CFM . . . . . . . . . . . . . . . . . . . . . 51
FURNACE CONTROL PROGRAMMING
AND NAVIGATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 23 – System Status Display Codes . . . . . . . . . . . . . . . . . . . 52
Table 24 – Main Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
SERVICE LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
START-UP, ADJUSTMENT, AND SAFETY CHECK . . . . . . . . . . 55
Table 25 – Test Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 26 – Altitude Derate Multiplier for U.S.A. . . . . . . . . . . . . . 58
Table 27 – Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 28 – Orifice Size and Manifold Pressure (in. w.c.) for
Gas Input Rate – Two-Stage Furnace . . . . . . . . . . . . . . . . . . . . . . 60
SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . . 62
Electrical Controls and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . . 75
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
TRAINING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
To learn more about this appliance and installation via a mobile device,
go to
https://bryant.hvacpatners.com/NFC
access airflow tables or troubleshooting guide on your mobile device go
to
https://mlctraining.com/training/techdocs/216/
below.
Portions of the text and tables are reprinted from NFPA 54/ANSI
Z223.1E, with permission of National Fire Protection Association,
or use the QR code below. To
or use the QR code
A240425
A200352
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Summary of Contents for Carrier 987TA
- Page 1 987TA Two-Stage, Variable-Speed, Multipoise 35 in. (889 mm) Tall, Condensing Gas Furnace Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS Table 18 – 48060V17 Airflow in CFM ..... 49 REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS2 Table 19 –...
- Page 2 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Quincy, MA 02269 and American Gas Association, Washington DC of the NFPA or ANSI on the referenced subject, which is represented 20001. This reprinted material is not the complete and official position only by the standard in its entirety.
- Page 3 987TA: 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 48060C17 17-1/2 (445) 15-7/8 (403) 16 (406) 8-3/4 (222) 143 (64.6)
- Page 4 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions may cause death, personal injury, or property damage. Consult a WARNING qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use FIRE, EXPLOSION, ELECTRICAL SHOCK, AND factory-authorized kits or accessories when modifying this product.
- Page 5 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 2. Install this furnace only in a location and position as specified in the NOTICE “Location” section of these instructions. 3. Provide adequate combustion and ventilation air to the furnace IMPORTANT INSTALLATION AND START-UP space as specified in “Air for Combustion and Ventilation”...
- Page 6 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions and/or vent to fail prematurely, customer discomfort and/or vent freezing. Failure to follow these guidelines is considered faulty installation and/or misapplication of the furnace; and resulting failure, damage, or repairs may impact warranty coverage.
- Page 7 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Duct Systems 6. Before removing a new control from its container, discharge your body’s electrostatic charge to ground to protect the control from • US and CANADA: Current edition of Air Conditioning Contractors damage.
- Page 8 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions • Hydrochloric acid WARNING • Cements and glues • Antistatic fabric softeners for clothes dryers CARBON MONOXIDE POISONING / COMPONENT • Masonry acid washing materials DAMAGE HAZARD All fuel-burning equipment must be supplied with air for fuel Failure to follow this warning could result in personal injury or death combustion.
- Page 9 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions • Spaces having less than 50 cubic feet per 1,000 BTUh (4.8 cubic CAUTION meters per kW) require the Outdoor Combustion Air Method. • Spaces having at least 50 cubic feet per 1,000 BTUh (4.8 cubic meters...
- Page 10 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 5 – Minimum Space Volumes for 100% Combustion, Ventilation and Dilution Air from Outdoors OTHER THAN FAN-ASSISTED TOTAL FAN-ASSISTED TOTAL (1,000’S BTUH GAS INPUT RATE) (1,000’S BTUH GAS INPUT RATE) Space Volume Ft3 (M3) 0.60...
- Page 11 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 2. An attic or crawlspace may be considered a space that freely WARNING communicates with the outdoors provided there are adequate permanent ventilation openings directly to outdoors having free CARBON MONOXIDE POISONING HAZARD area of at least 1-in.2/4,000 BTUh of total input rating for all gas...
- Page 12 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Vent Pipe Clamp Condensate Trap Vent Elbow Clamp Relief Port Collector Box Plugs Vent Elbow Collector Box Plug Condensate Trap Relief Port Condensate Trap Pressure Switch Outlet Port UPFLOW TRAP CONFIGURATION 1 & 2 Stage Units A11307 Fig.
- Page 13 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 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. • Orient the furnace in the desired position.
- Page 14 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 5. Pull the grommet through the casing from the outside until it is CAUTION seated in the hole. 6. Attach the plain end of the drain elbow to the outlet stub on the PROPERTY DAMAGE HAZARD drain trap.
- Page 15 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions CAUTION CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts, and servicing furnaces.
- Page 16 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 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. NOTICE The field-supplied, accessory horizontal drain trap grommet is ONLY REQUIRED FOR DIRECT VENT APPLICATIONS.
- Page 17 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Return Air Connections WARNING FIRE HAZARD HORIZONTAL TOP RETURN NOT A failure to follow this warning could cause personal injury, death PERMITTED FOR ANY MODEL and/or property damage. Never connect return-air ducts to the back of the furnace. Follow instructions below.
- Page 18 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Supply Air Connections WARNING NOTE: For downflow applications, this furnace is approved for use on combustible flooring when any one of the following accessories are FIRE, EXPLOSION, AND CARBON MONOXIDE used: POISONING HAZARD •...
- Page 19 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: Not all horizontal furnaces are approved for side return air connections. See Fig. 23. Where required by code, seal bottom closure to furnace with tape, mastic, or other durable sealing method.
- Page 20 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Due to the relatively high pressure drops of 1-in (25 mm) thick ″ 5/ 16 after-market filter media, it is recommended that the filtration system be (8mm) (8mm) designed for at least 2-in (51 mm) thick media.
- Page 21 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 7 – Optional 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 22 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 9 – Air Filter Selection and Duct Sizing - In. (mm) COMBUSTION - AIR PIPE (SEE VENTING SECTION) FILTER SIZE FURNACE FILTER TYPE SIDE BOTTOM CASING WIDTH RETURN RETURN 16 x 25 x 3/4...
- Page 23 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Ductwork Acoustical Treatment blocks, bricks or angle iron. For crawlspace installations, if the furnace is not suspended from the floor joists, the ground underneath furnace NOTE: Metal duct systems that do not have a 90 degree elbow and 10 must be level and the furnace set on blocks or bricks.
- Page 24 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Gas entry can be from left or right side, or top panel. See Fig. 30 Piping should be pressure and leak tested in accordance with the current Fig. addition of the NFPA 54/ANSI Z223.1 in the United States, local, and national plumbing and gas codes before the furnace has been connected.
- Page 25 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions NOT exceed maximum 0.5 psig (14-in. w.c.) stated on gas control valve. WARNING Fig. If pressure exceeds 0.5 psig (14-in. w.c.), gas supply pipe must be ELECTRICAL SHOCK AND FIRE HAZARD disconnected from furnace and capped before and during supply pipe pressure test.
- Page 26 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 11 – Electrical Data MAXIMUM OPERATING VOLTAGE VOLTS- MAXIMUM MINIMUM MAXIMUM FUSE WIRE LENGTH UNIT RANGE FURNACE SIZE HERTZ- UNIT WIRE SIZE OR CKT BKR ‡ FT (M) † AMPACITY PHASE...
- Page 27 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions factory ground wire are secured to the bracket grounding screw. If the 8. Pull the ground wire of the field line voltage wiring through the J-Box cover is not used, the field and factory spliced connections must strain-relief bushing into the furnace casing.
- Page 28 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 6. Attach furnace J-Box cover to mounting bracket with screws Temperature Display supplied in loose parts bag. Do not pinch wires between cover and The SAT and RAT temperatures can be displayed on the control board 3 bracket.
- Page 29 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions To HUM Terminal On To Humidifier Leads Furnace Control Board 24 V Coil To Humidifier Leads To Com/24V Screw Terminal on Thermostat Strip A11157 Fig. 38 – Field-supplied Isolation Relay for Humidifiers with...
- Page 30 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 12. Configure Dehumidify function to remove 24 VAC from Dehum WARNING terminal on a demand to dehumidify. Consult thermostat installation instructions for more information. CARBON MONOXIDE POISONING HAZARD 13. Thermostat terminal connection order on furnace control may vary- reference furnace control labeling for designations.
- Page 31 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 12 – Vent Termination Kit for Direct Vent (2-pipe) Systems Approved Two-Pipe Termination Fittings Vent and Combustion Allowable Concentric Concentric Vent Kit 1 1/2-in. 2-in. 2 1/2-in. 3-in. 4-in. Air Pipe Diameters...
- Page 32 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Do not take combustion air from inside the chimney when using WARNING ventilated combustion air or single-pipe vent option. These furnaces can be vented as direct-vent (two-pipe), ventilated CARBON MONOXIDE POISONING HAZARD combustion air or non-direct (single-pipe) vent system.
- Page 33 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions abandoned chimney to supply outside air to the furnace. See Fig. 45 NOTICE references to vent clearances required by National code authorities. A combustion air pipe to the outdoors is not required for a single-pipe OPTIONAL VENTING BELOW THE FURNACE vent system.
- Page 34 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions No ope rable windows , doo rs or Clearanc e distance s for intakes of any type within the items greater than 3 feet shade d areas of Wall A and B.
- Page 35 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions A12326 Fig. 44 – 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 36 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions A12325 Fig. 45 – 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 37 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 4. Do not locate termination directly into prevailing winds. WARNING Termination should be positioned so that it will not be affected by sustained prevailing winds over 30 mph, wind eddy, such as inside...
- Page 38 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Ventilated Combustion Air potentially direct the flue gas plume toward the intake air stream and contaminate the incoming combustion air for the furnace. The vent pipe for a Ventilated Combustion Air System must terminate Refer to Fig.
- Page 39 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions NOTICE OPTIONAL CONFIGURATION FOR COMBUSTION AIR INLET PIPE In applications where there is a risk of excessive moisture entering the combustion air inlet pipe, a moisture trap may be added to the inlet pipe...
- Page 40 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: If the calculated Total Equivalent Vent Lengths results in NOTICE different diameter pipes for the vent and combustion air, select the larger diameter for both pipes. ADDITIONAL INFORMATION FOR POLYPROPYLENE NOTE: If the Maximum Vent Length for diameter of the pipe selected is...
- Page 41 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Maximum Equivalent Vent Length NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows. Use Table 15 - Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application.
- Page 42 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Configure the Furnace WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death. To route the vent pipe and combustion air pipe through the furnace, the manufacturer supplied kit must be used.
- Page 43 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions A11327A HORIZONTAL LEFT-VERTICAL VENT CONFIGURATION A11311A DOWNFLOW LEFT CONFIGURATION A230013 DOWNFLOW RIGHT CONFIGURATION A11328A HORIZONAL LEFT-LEFT VENT CONFIGURATION A11329A HORIZONTAL LEFT-RIGHT VENT CONFIGURATION Fig. 57 – Horizontal Left (Appearance may vary) Requires Accessory Internal Vent Kit.
- Page 44 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions A11337 HORIZONTAL RIGHT-VERTICAL VENT CONFIGURATION A11335 HORIZONTAL RIGHT-RIGHT VENT CONFIGURATION Fig. 58 – Horizontal Right (Appearance may vary) See “Notes for Venting Options” Notes for venting options 1. Attach vent pipe adapter with gasket to furnace casing.
- Page 45 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 120,000 BTUH 140,000 BTUH Unit Size Uninsulated 3/8-in. Insulation 1/2-in. Insulation Uninsulated 3/8-in. Insulation 1/2-in. Insulation Winter Pipe Dia. 2 ½ 2 ½ 2 ½ 2 ½ 2 ½ 2 ½ Design Temp °F...
- Page 46 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 14. Wipe excess cement from joint. A continuous bead of cement will CAUTION be visible around perimeter of a properly made joint. 15. Handle pipe joints carefully until cement sets. CARBON MONOXIDE POISONING HAZARD 16.
- Page 47 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Concentric Vent 2. Loosely assemble concentric vent/combustion air termination components together using instructions in kit. Single or multiple concentric vent must be installed as shown in Fig. 3. Slide assembled kit with rain shield REMOVED through hole.
- Page 48 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 5. Torque vent elbow clamp 15-lb-in. foot of flexible vent pipe equals one foot of straight PVC/ABS DWV vent pipe. Venting System Length Calculations Compare the Total Equivalent Vent Length to the Maximum Equivalent...
- Page 49 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Air Delivery (CFM) with Filter 48060V17 48080C17 Table 18 – Airflow in CFM Table 19 – Airflow in CFM Setting ESP (in.w.c.) Setting ESP (in.w.c.) 0.1 0.2 0.3 0.1 0.2 0.3 †...
- Page 50 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 20 – 60080C21 Airflow in CFM Table 21 – 66100C21 Airflow in CFM Setting ESP (in.w.c.) Setting ESP (in.w.c.) 0.1 0.2 0.3 0.1 0.2 0.3 † † 1000 1000 1050 1050...
- Page 51 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions FURNACE CONTROL PROGRAMMING Table 22 – 66120C24 Airflow in CFM AND NAVIGATION Setting ESP (in.w.c.) On-Board Control Method 0.1 0.2 0.3 CAUTION ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, or death.
- Page 52 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 23 – System Status Display Codes Display Operating Mode Notes: Idle/Standby Mode No active demands High Heating Mode Gas Heating active Low Heating Mode Gas Heating active High Cooling Mode Cooling or Heat Pump active...
- Page 53 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Control Board Replacement To Activate Bluetooth Module: 1. Login to the Bryant Service Technician app using your If the control board must be replaced, the new board must be HVACPartners username and password.
- Page 54 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions SERVICE LABEL A230245 Fig. 61 – Service Label Information Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 55 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions START-UP, ADJUSTMENT, AND SAFETY 6. Blower door must be in place to complete 115-V electrical circuit and supply power to the furnace components. CHECK Start-Up Procedures NOTICE 1. Purge gas lines after all connections have been made.
- Page 56 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions WIRING DIAGRAM A230244 Fig. 62 – Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 57 987TA: 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 Never purge a gas line into a combustion chamber.
- Page 58 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions NOTICE NOTICE The NATURAL GAS manifold pressure adjustments in Table If orifice hole appears damaged or it is suspected to have been redrilled, compensate for BOTH altitude AND gas heating value. DO NOT apply check orifice hole with a numbered drill bit of correct size.
- Page 59 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Adjust Manifold Pressure NOTICE 1. Adjust manifold pressure to obtain low fire input rate. See Fig. a. Turn gas valve ON/OFF switch to OFF. DO NOT set high-heat manifold pressure less than 3.2-in. w.c. (797 Pa) b.
- Page 60 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 27 – Gas Rate (CU ft./hr) Table 28 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate – Two-Stage Furnace SIZE OF TEST SIZE OF TEST DIAL DIAL...
- Page 61 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 28 – Orifice Size and Manifold Pressure (in. w.c.) for Gas cycle through the current operating mode, SAT, RAT, and temperature Input Rate – Two-Stage Furnace (Continued) differential. If displayed SAT value does not agree with measured...
- Page 62 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions a. Run furnace for at least 5 minutes. WARNING b. Gradually block off return air with a piece of cardboard or sheet metal until the limit trips. ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD c.
- Page 63 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions installation, service, or maintenance will cause this fuse to blow. If fuse For continuing high performance and to minimize possible furnace replacement is required, use ONLY a 3-amp. fuse. The control LED will failure, periodic maintenance must be performed on this furnace.
- Page 64 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions c. Loosen the clamps on the vent couplings and combustion air pipe WARNING located on the blower shelf. d. Separate the pipes from the blower compartment and set aside. CARBON MONOXIDE POISONING AND FIRE e.
- Page 65 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions WARNING ELECTRICAL OPERATION 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 unless switch is closed. Caution must be taken when manually closing this switch for service purposes.
- Page 66 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions IGNITER BURNER SUPT. ASSY BRACKET, IGNITER BURNER ASSY FLAME ROLLOUT SWITCH FLAME SENSOR (BELOW BURNER) A11403 Fig. 68 – Burner Assembly 20. Clean the flame sensor with fine steel wool (0000 grade). Do not use sand paper or emery cloth.
- Page 67 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions Flushing Collector Box and Drainage System 10. Rinse condensate trap in warm water until trap is clean. 11. Flush condensate drain lines with warm water. Remember to check WARNING and clean the relief port on the collector box.
- Page 68 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 13. Check furnace operation through 2 complete heat operating cycles. WARNING Look at burners. Burner flames should be clear blue, almost transparent. See Fig. ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD 14. Check for gas leaks.
- Page 69 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions 9. Remove the middle unused rubber plug from the port on the will remain running at high-speed. After the low-heat collector box opposite the condensate trap. See Fig. pressure switch re-closes the furnace control CPU will begin a 15-sec prepurge period, and continue to run the 10.
- Page 70 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions g. Switching from High- to Low-Heat -The furnace control CPU b. Single-Stage Thermostat and Two-Speed Cooling - will not switch from high-heat to low-heat while the thermostat Fig. 40 for thermostat connections.
- Page 71 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions The furnace CPU is factory set for a 90 second cooling blower-OFF restarts at the end of the blower-ON delay period at low-heat or delay See Fig. high-heat airflow, respectively. The blower motor BLWM will revert to continuous fan airflow 4.
- Page 72 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions TROUBLESHOOTING A230352 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 73 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions A230353 Troubleshooting Guide (Continued) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 74 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions A230354 Fig. 71 – Troubleshooting Guide Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 75 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions PARTS REPLACEMENT INFORMATION GUIDE Casing Group Gas Control Group Blower door Burner Bottom plate Flame sensor Control door Gas valve Door knob assembly Hot surface igniter Top filler plate Manifold Electrical Group...
- Page 76 987TA: Installation, Start-up, Operating, Service and Maintenance Instructions © 2024 Carrier. All rights reserved. Edition Date: 10/24 Catalog No: 987TA-01SI A Proud Member of the Carrier Family Replaces: NEW Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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