Bryant 986TC Installation, Start-Up, Operating, Service And Maintenance Instructions

Bryant 986TC Installation, Start-Up, Operating, Service And Maintenance Instructions

Two-stage, variable-speed, multipoise 35 in. (889 mm) tall, condensing gas furnace

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986TC
Two-Stage, Variable-Speed, Multipoise
35 in. (889 mm) Tall, Condensing Gas Furnace
NOTE: Read the entire instruction manual before starting the installation.

TABLE OF CONTENTS

IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 1 - Minimum Clearances to Combustible Materials for All Units
4
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 2 - Loose Parts Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CODES AND STANDARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCE-
DURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AIR FOR COMBUSTION AND VENTILATION . . . . . . . . . . . . . . 7
Table 3 - Minimum Free Area Required for Each Combustion Air
Opening or Duct to Outdoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4 - Minimum Space Volumes for 100% Combustion, Ventila-
tion and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . . . . . . . 9
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Condensate Drain Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 5 - Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . 16
Table 6 - Air Filter Selection and Duct Sizing - In. (mm) . . . . . 18
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
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 9 - Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . . 23
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
115-V Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 10 - Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
24-V Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 11 - Vent Termination Kit for Direct Vent (2-pipe) Systems33
Table 12 - Maximum Allowable Exposed Vent Lengths Insulation Ta-
ble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 13 - Maximum Equivalent Vent Length - Ft. . . . . . . . . . . 43
Table 14 - Deductions from Maximum Equivalent Vent Length - Ft.
(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 15 - Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 16 - Approved Combustion-Air and Vent Pipe, Fitting and Ce-
ment Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
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
on the referenced subject, which is represented only by the standard in its entirety.
Table 17 - Cooling4 and Heating Air Delivery - CFM (Bottom Re-
turn5 with Filter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 18 - Altitude Derate Multiplier for U.S.A. . . . . . . . . . . . . 56
Table 19 - Blower Off Delay Setup Switch . . . . . . . . . . . . . . . . 59
Table 20 - Orifice Size and Manifold Pressure (In. W.C.) for Gas Input
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 21 - Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 61
SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . 61
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 76
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
TRAINING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury and/or
death.
Carbon Monoxide (CO) is a colorless, odorless, and tasteless poisonous
gas that can be fatal when inhaled. Follow all installation, maintenance,
and service instructions. See additional information below regarding
the installation of a CO Alarm.
Most states in the USA and jurisdictions in Canada have laws that
require the use of Carbon Monoxide (CO) alarms with fuel burning
products. Examples of fuel burning products are furnaces, boilers, space
heaters, generators, water heaters, stoves/ranges, clothes dryers,
fireplaces, incinerators, automobiles, and other internal combustion
engines. Even if there are no laws in your jurisdiction requiring a CO
Alarm, it's highly recommended that whenever any fuel burning product
is used in or around the home or business that the dwelling be equipped
with a CO Alarm(s). The Consumer Product Safety Commission
recommends the use of CO Alarm(s). The CO Alarm(s) must be
installed, operated, and maintained according to the CO Alarm
manufacturer's instructions. For more information about Carbon
Monoxide, local laws, or to purchase a CO Alarm online, please visit the
following website. https://www.kidde.com.
A200352

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Table of Contents
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Summary of Contents for Bryant 986TC

  • Page 1: Table Of Contents

    986TC 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 17 – Cooling4 and Heating Air Delivery - CFM (Bottom Re- REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS2 turn5 with Filter) .
  • Page 2: Required Notice For Massachusetts Installations2

    986TC: 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: Safety Considerations

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: ALL DIMENSIONS IN INCH (MM) U.S. ECCN: Not Subject to Regulation (N.S.R.) SD5660-4 REV. - A210210 SHIP WT. FURNACE SIZE LB (KG) CABINET WIDTH OUTLET WIDTH BOTTOM INLET WIDTH AIR INTAKE...
  • Page 4 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions NOTICE are used to highlight suggestions which will result in enhanced WARNING installation, reliability, or operation. 1. Use only with type of gas approved for this furnace. Refer to the FIRE HAZARD furnace rating plate.
  • Page 5: Introduction

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions and/or vent to fail prematurely, customer discomfort and/or vent NOTICE freezing. Failure to follow these guidelines is considered faulty installation and/or IMPORTANT INSTALLATION AND START-UP misapplication of the furnace; and resulting failure, damage, or repairs PROCEDURES may impact warranty coverage.
  • Page 6: Codes And Standards

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions • The use of copper tubing for gas piping is not approved by the state of Massachusetts. Electrical Connections • US: Current edition of National Electrical Code (NEC) NFPA 70 • CANADA: Current edition of Canadian Electrical Code CSA C22.1 Condensate Drain Connection •...
  • Page 7: Location

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions LOCATION WARNING CAUTION CARBON MONOXIDE POISONING / COMPONENT DAMAGE HAZARD PERSONAL INJURY AND/OR PROPERTY Failure to follow this warning could result in personal injury or death DAMAGE HAZARD and unit component damage.
  • Page 8 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Ventilated Combustion Air Applications WARNING When the furnace is installed using the ventilated combustion air option, the attic or crawlspace must freely communicate with the outdoor to CARBON MONOXIDE POISONING HAZARD provide sufficient air for combustion. The combustion air pipe cannot be Failure to follow this warning could result in personal injury or death.
  • Page 9 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions EXAMPLES: Determining Free Area FURNACE WATER HEATER TOTAL INPUT 100,000 30,000 (130,000 divided by 4,000) 32.5 Sq. In. for each two Vertical Ducts or Openings 60,000 40,000 (100,000 divided by 3,000) 33.3 Sq. In. for each Single Duct or Opening...
  • Page 10: Condensate Trap

    986TC: 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 11 986TC: 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 12: Condensate Drain Connection

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions NOTICE Evaporator Coil + + + + = Positive pressure The field-supplied, accessory horizontal drain trap grommet is ONLY < + = Pressure lower than areas with + = Negative pressure REQUIRED FOR DIRECT VENT APPLICATIONS. It it NOT...
  • Page 13 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions pad and replaces the factory-installed condensate trap. Refer to the Accessory section of the Product Data Sheet for current kit number. A self-regulating, shielded and waterproof heat tape rated at 3 to 6 watt per foot (10 to 20 watt per meter) at 115 volt, 40°F (4°C) may be used to...
  • Page 14 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions grommet at the opposite side of the furnace as necessary for proper fit and positioning. In both upflow and downflow orientations, the Z-pipe should NOT be resting on any sheet metal parts.
  • Page 15: Installation

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions condensate and compatible with mineral and vegetable oils, such as UPFLOW DOWNFLOW HORIZONTAL canola oil. PERFORATED DISCHARGE DUCT 90° 90° FLANGE 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.
  • Page 16 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions HORIZONTAL TOP RETURN NOT PERMITTED FOR ANY MODEL BOTTOM CLOSURE SCREWS (2) Representative drawing. Models may vary. Lay furnace on the back or side Remove the two (2) screws that secure the bottom...
  • Page 17 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions FURNACE FURNACE (OR COIL CASING WHEN USED) APPROVED COIL ASSEMBLY COIL BOX COMBUSTIBLE COMBUSTIBLE FLOORING FLOORING PLENUM OPENING DOWNFLOW SUBBASE SHEET METAL PLENUM FLOOR SHEET METAL PLENUM OPENING FLOOR FLOOR OPENING OPENING A10491 Fig.
  • Page 18 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Supply Air Connections opening on the furnace. For side return use in the horizontal position, refer to Fig. 23. If both side and bottom openings are used in Fig. For a furnace not equipped with a cooling coil, the outlet duct shall be each opening used will require a filter.
  • Page 19 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 4-in. Block Off 21-in. Furnace 14-3/16 and 17-1/2-in. Plate Furnace 4-Ton or less, AC capacity airflow 1/2-in. Screws 20-in. Media Cabinet 16-in. Media Cabinet Media Cabinet Installation Media Cabinet Installation Option for...
  • Page 20: Pa)

    986TC: 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: Air Ducts

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions AIR DUCTS 5. Reinstall bottom closure panel if removed. ″ 5/ 16 NOTICE (8mm) (8mm) Many states, provinces and localities are considering or have ″ 5/ 16 implemented standards and/or restrictions on duct sizing practices, ductwork leakage, and/or ductwork thermal, airflow and electrical ″...
  • Page 22: Gas Piping

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions GAS PIPING COMBUSTION - AIR PIPE (SEE VENTING SECTION) WARNING FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Never purge a gas line into a combustion chamber. Never test for gas leaks with an open flame.
  • Page 23 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions PRESSURE TESTING ABOVE ½ psig: Left Side Gas Entry. Gas Pipe Gas Pipe Grommet Required Grommet Required For Direct The furnace and it’s individual shut-off valve must be disconnected from For Direct Vent Applications Vent Applications.
  • Page 24: Electrical Connections

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions during supply pipe pressure test. After all connections have been made, WARNING purge lines and check for leakage at furnace prior to operating furnace. The gas supply pressure shall be within the maximum and minimum...
  • Page 25 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions WARNING FIRE HAZARD Failure to follow this warning could result in personal injury, death, or property damage. Do not connect aluminum wire between disconnect switch and furnace. Use only copper wire. See Fig.
  • Page 26 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 1. Select and remove 7/8-in. (22 mm) knock-out on the desired side of the casing. Remove the knock-out from the casing. NOTE: If electrical entry through the furnace top panel is used, a 7/8-in.
  • Page 27: 24-V Wiring

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 3. Communication Connector (communication connection) WARNING This connection is used when the furnace is controlled by an optional communicating User Interface instead of a standard FIRE, EXPLOSION, ELECTRICAL SHOCK, AND thermostat. The communication plug is supplied with the User Interface.
  • Page 28 986TC: 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 Internal Power Supply...
  • Page 29 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions THERMOSTAT THERMOSTAT See notes 2, 5, 7, 10, 11, 16, and 17 See notes 1, 2, 4, 6, 7, 9, 10, 11, 15, 16, and 17 Modulating and 2-Stage Furnace with Single-Speed Heat Pump...
  • Page 30: Venting

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 7. Configure thermostat for single-stage compressor operation. Refer to thermostat instructions. 8. Configure thermostat for two-stage compressor operation. Refer to thermostat instructions. 9. Configure thermostat for HYBRIDHEATr dual fuel operation. Refer to thermostat instructions.
  • Page 31 986TC: 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 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions NOTICE NOTICE RECOMMENDED SUPPORT FOR VENT OPTIONAL VENTING BELOW THE FURNACE TERMINATION The venting system may be positioned below the furnace ONLY IF the factory accessory External Vent Trap Kit is used. The External Vent It is recommended that sidewall vent terminations of over 24 inches Trap Kit is only approved for PVC/ABS DWV venting systems.
  • Page 33 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 12 in. (305mm) min. separation between bottom of combustion air and bottom of vent (Typ.) A13305 Fig. 42 – Combustion Air and Vent Pipe Termination for Direct Vent (2-Pipe) System Table 11 – Vent Termination Kit for Direct Vent (2-pipe) Systems...
  • Page 34 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Roof Termination (Preferred) Vent Maintain 12 in (305mm) minimum clearance above highest anticipated snow level maximum of 24 in. (610mm) above roof Abandoned masonry used as raceway (per code) 12 in. min. (305 mm)from overhang or roof 6 in.
  • Page 35 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions A12326 Fig. 46 – 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 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions A12325 Fig. 47 – 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 986TC: 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 38 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Non-Direct Vent / 1-Pipe System There are no additional restrictions on unobstructed distances greater than 8 ft. (2.4 M). All single, two-pipe and concentric vents may be used, The vent pipe for a Non Direct Vent (1-pipe) system must terminate providing all other Code and manufacturer’s requirements in these...
  • Page 39 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions TO CODE- - APPROVED DRAIN OR CONDENSATE PUMP Recommend “T” fitting with 4--inch minimum height standpipe (A) of same diameter or larger extending upward. Dry Well Dry Well (water tight Dry Well...
  • Page 40 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions To calculate the Total Equivalent Vent Length (TEVL) of the venting 6. Install the insulation per the insulation manufacturer’s installation system: instructions. 1. Measure the individual distance from the furnace to the termination NOTE: Pipe length (ft.
  • Page 41: Ble

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Ventilated Combustion Air intake pipe Pipe hangar 3” (76 mm) 12” (305 mm) Ventilated Combustion Air intake termination in crawl space CRAWL SPACE highest level of insulation ATTIC A10497 Fig. 52 – Vent Terminations for Ventilated Combustion Air Table 12 –...
  • Page 42 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 80,000 BTUH Unit Size Uninsulated 3/8-in. Insulation 1/2-in. Insulation Winter Pipe Dia. 1 ½ 2 ½ 1 ½ 2 ½ 1 ½ 2 ½ Design Temp °F 100,000 BTUH Unit Size Uninsulated 3/8-in.
  • Page 43 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows. Use Table 14 - Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application.
  • Page 44 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Slope vent pipe back to the furnace at least ¼” per foot Use 45 deg. Elbows where Avoid short horizontal offsets with 90 possible, to ensure conden- deg. Elbows. Short offsets can be sate drainage.
  • Page 45 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Any other unused knockout may be used for combustion air connection. Requires Accessory Internal Vent Kit. A11310A See Product Data for current kit number. UPFLOW VERTICAL VENT A11313A Fig. 55 – Upflow Configurations (Appearance may vary) DOWNFLOW VERTICAL See “Notes for Venting Options”...
  • Page 46 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions ALTERNATE COMBUSTION AIR CONNECTIONS Requires Accessory Vent Kit See Product Data for Current Kit Number A11335 A11329A HORIZONTAL RIGHT-RIGHT VENT CONFIGURATION HORIZONTAL LEFT-RIGHT VENT CONFIGURATION Fig. 58 – Horizontal Right (Appearance may vary) Fig.
  • Page 47 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 4. Slide the end of the rubber vent coupling with notches in it over the 6. Tighten the clamp around the outlet of the vent elbow. Torque the standoffs on the vent pipe adapter.
  • Page 48 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Table 15 – Hanger Spacing Material Diameter PVC Sch 40 SDR 21 & 26 CPVC Polypropylene 1 1/2-in. 3-ft. 2 1/2-ft. 3-ft. 3-ft. 3.25-ft. 38-mm 914-mm 762-mm 914-mm 914-mm 1000 mm 2-in.
  • Page 49 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions It is recommended that the flashing be installed by a roofer or competent 1. Cut one 4-in. diameter hole for 2-in. kit, or one 5-in. diameter hole professional prior to installing the concentric vent. The terminations can for 3-in.
  • Page 50 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Table 16 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials MATERIALS 1. All pipe*, fittings*, primers**, and solvents** must conform to American National Standards Institute (ANSI) standards and American Society for Testing and Materials (ASTM) standards 2.
  • Page 51: Start-Up, Adjustment, And Safety Check

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Example 2 A direct-vent 60,000 BTUH furnace installed at 2100 ft. (640M). Venting system includes FOR EACH PIPE: 100 feet (30 M) of vent pipe, 95 feet (29 M) of combustion air inlet pipe, (3) 90º long-radius elbows, and a polypropylene concentric vent kit. Also includes 20 feet (6.1 M) of flexible polypropylene vent pipe, included within the 100 feet (30 M) of vent pipe.
  • Page 52 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions A190155 Fig. 61 – Furnace Setup Switches and Description Table 17 – Cooling and Heating Air Delivery - CFM (Bottom Return with Filter) (SW1-5 and SW4-3 set to OFF, except as indicated. See notes 1 and 2.)
  • Page 53 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Table 17 – Cooling and Heating Air Delivery - CFM (Bottom Return with Filter) (Continued) (SW1-5 and SW4-3 set to OFF, except as indicated. See notes 1 and 2.) Unit Size: Clg/CF Switch settings...
  • Page 54 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Table 17 – Cooling and Heating Air Delivery - CFM (Bottom Return with Filter) (Continued) (SW1-5 and SW4-3 set to OFF, except as indicated. See notes 1 and 2.) Unit size: Clg/CF Switch settings...
  • Page 55 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Setup Switches Prime Condensate Trap with Water There are four sets of setup switches on the furnace control board. These WARNING switches configure the furnace for correct application requirement. They also select the airflow settings for Air Conditioning and Continuous Fan CARBON MONOXIDE POISONING HAZARD airflows.
  • Page 56 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions NOTICE WARNING FIRE OR EXPLOSION HAZARD The NATURAL GAS manifold pressure adjustments in Table 20 compensate for BOTH altitude AND gas heating value. DO NOT apply Failure to follow this warning could result in personal injury, death,...
  • Page 57 986TC: 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. If orifice hole appears damaged or it is suspected to have been redrilled, b.
  • Page 58 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Clocking the Meter CAUTION Verify natural gas input rate by clocking meter. NOTE: Contact your HVAC distributor or gas supplier for metric gas FURNACE DAMAGE HAZARD meter tables, if required. Failure to follow this caution may result in: 1.
  • Page 59 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 2. Wait until the blower off delay is completed. via SW3 at the control board. Refer to the section titled “continuous Blower Speed selection for Thermostat.” 3. Turn 115 VAC power off.
  • Page 60 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions should NOT glow and control diagnostic light flashes a status Table 20 – Orifice Size and Manifold Pressure (In. W.C.) for Gas code 32 if hot surface igniter glows when inducer motor is Input Rate disconnected, shut down furnace immediately.
  • Page 61: Service And Maintenance Procedures

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Table 21 – Gas Rate (CU ft./hr) SIZE OF TEST SIZE OF TEST DIAL DIAL SECONDS SECONDS FOR 1 REV FOR 1 REV 1 Cu 2 Cu 5 Cu 1 Cu 2 Cu...
  • Page 62 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions The electrical ground and polarity for 115-v wiring must be properly CAUTION maintained. Refer to Fig. 37 for field wiring information and to Fig. 74 for furnace wiring information. ENVIRONMENTAL HAZARD NOTE: If the polarity is not correct, the STATUS LED on the control will flashes rapidly and prevent the furnace from heating.
  • Page 63 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions WARNING WARNING ELECTRICAL SHOCK HAZARD ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury, or death. Failure to follow this warning could result in personal injury, death, and/or property damage.
  • Page 64 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 7. If greasy residue is present on blower wheel, remove wheel from WARNING the blower housing and wash it with an appropriate degreaser. To remove wheel: ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD a.
  • Page 65 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 19. Turn on gas supply and cycle furnace through one complete heating 9. Support the manifold and remove the four screws that secure that cycle. Verify the furnace temperature rise as shown in Adjustments manifold assembly to the burner assembly and set aside.
  • Page 66 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions a. Using a 1/4-in. driver, remove the two screws securing the igniter mounting bracket to the burner assembly. See Fig. b. Carefully withdraw the igniter and bracket assembly through the front of the burner assembly without striking the igniter on surrounding parts.
  • Page 67 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions 5. Disconnect external drain from condensate drain elbow or drain replaced rather than trying to clean them thoroughly due to their intricate extension pipe inside the furnace and set aside. design. A build-up of soot and carbon indicates that a problem exists which needs to be corrected, such as improper adjustment of manifold 6.
  • Page 68: Winterization

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions Since the furnace uses a condensing heat exchanger, some water will accumulate in the unit as a result of the heat transfer process. Therefore, once it has been operated, it cannot be turned off and left off for an extended period of time when temperatures will reach 32_F (0_C) or lower unless winterized.
  • Page 69 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions A190174 Fig. 73 – Troubleshooting Guide Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 70 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions A11326B Troubleshooting Guide (Continued) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 71 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions A11326C Troubleshooting Guide (Continued) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 72: Sequence Of Operation

    986TC: Installation, Start-up, Operating, Service and Maintenance Instructions SEQUENCE OF OPERATION b. Igniter Warm-Up -At the end of the prepurge period, the Hot-Surface Igniter HSI is energized for a 17-sec igniter NOTE: Furnace control must be grounded for proper operation or else warm-up period.
  • Page 73 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions circuits always causes high-heat operation, regardless of the setting of low-cooling for up to 20 minutes and then energize the air conditioning the low-heat only switch. relay ACR to energize the Y/Y2 terminal and switch the outdoor unit to high-cooling, as long as the thermostat continues to call for cooling.
  • Page 74 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions a. Low cooling-When the R-to-G-and-Y1 circuit is closed and high-cooling airflow before transitioning back there is a demand for dehumidification, the furnace blower motor continuous-blower airflow. When the R-to-G circuit is opened, the...
  • Page 75 986TC: Installation, Start-up, Operating, Service and Maintenance Instructions A190153 Fig. 74 – Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 76: Parts Replacement Information Guide

    986TC: 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...

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