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General| Model | 986TC |
|---|---|
| Type | Gas Furnace |
| Efficiency Rating | High Efficiency |
| Blower Type | Variable Speed |
| Stages | Modulating |
| AFUE Rating | Up to 98.3% |
| Fuel Type | Natural Gas or Propane |
| Warranty | Lifetime Heat Exchanger Limited Warranty |
| Parts Warranty | 10-Year Parts Limited Warranty |
Key requirements for gas-fueled equipment installations in Massachusetts.
General warnings about fire, explosion, electrical shock, and CO poisoning.
Warnings regarding improper installation, adjustment, and maintenance.
Precautions for handling sheet metal parts with sharp edges.
Explanation of DANGER, WARNING, CAUTION signal words.
Key requirements for safe and proper furnace operation and installation.
Table detailing minimum required clearances for safe installation.
Procedures to minimize smoke/odor complaints during initial operation.
Proper furnace positioning for multipoise orientations and condensate drainage.
Specific safety measures for installing furnaces in garages.
Compliance requirements for installation based on national and local codes.
Procedures to prevent damage to electronic components from static discharge.
Guidelines for furnace placement, including construction heating and corrosive atmospheres.
Introduction to air needs for direct-vent and non-direct-vent furnace configurations.
Requirements for systems using ventilated combustion air.
Warnings about contaminants in combustion air that can cause corrosion.
Guidelines for providing outdoor air for combustion and ventilation.
Procedures for calculating required air volume based on space volume and infiltration rates.
Instructions for installing and orienting the condensate trap.
Steps for configuring the condensate trap in upflow orientation.
Steps for configuring the condensate trap in downflow orientation.
Instructions for repositioning the trap in horizontal installations.
Specific requirement for the grommet in horizontal direct-vent applications.
Warnings regarding property damage from condensate and freezing hazards.
Procedures for moving the trap and connecting drain lines.
Detailed steps for routing the drain line on the right side.
Steps for routing drain lines on the left side and modifying the drain elbow.
Specific notes for drain connections in horizontal furnace installations.
Requirements for furnace pitching and cabinet air leakage specifications.
Instructions for connecting supply air ductwork to the furnace.
Permitted return air connections and prohibited locations, including warnings.
Information on bottom and side return air inlets and panel usage.
Table for selecting air filters based on furnace size and duct dimensions.
Specific requirements for downflow installation on combustible flooring.
Reinforces warnings about prohibited return air connections.
Caution regarding property damage risks when installing in attics.
Details on filter types, media, and cabinet selection.
Factors influencing filter and duct sizing, including pressure drop.
Diagrams illustrating media filter installation for various furnace sizes and return air types.
Tables comparing pressure drop for different filter types and airflows.
Steps for installing leveling legs if required for furnace stability.
General requirements and standards for designing and installing duct systems.
Guidelines for platform and suspended furnace support methods.
Requirements for installing flame roll-out protection.
Diagrams for attic platform and suspended furnace installation setups.
Critical warnings regarding gas piping installation safety.
Specific regulations for gas piping in Massachusetts.
Diagrams for gas entry and table for maximum pipe capacity.
Safety warnings and procedures for pressure testing gas piping.
General warnings covering shock, fire, explosion, and furnace operation hazards.
Guidelines for 115-V wiring and table of electrical specifications.
Procedures for installing an external electrical box on the furnace casing.
Instructions for installing the J-box and ensuring proper grounding.
Steps for mounting external electrical boxes on the side and top panels.
Instructions for installing power cords and BX cable within the J-box.
Wiring details for 24-V circuits and thermostat connections.
How to connect accessories like EAC, humidifiers, and communication interfaces.
Considerations for using alternate power supplies with the furnace.
Diagrams illustrating furnace control board connections and wiring layouts.
Diagrams for wiring thermostats with furnaces, AC, and heat pumps.
Guidance on planning the venting system and approved materials.
Specific venting requirements for installations in Canada.
Procedures for checking venting system operation and associated CO hazards.
Description of different venting system types (direct vent, ventilated, non-direct).
Guidelines for supporting vent terminations to prevent sagging or damage.
Warnings about hazards related to venting below the furnace and CO risks.
Required clearances for direct vent terminations based on codes and figures.
Information on available vent termination kits and their compatibility.
Guidelines for determining optimal locations for vent terminations.
Clearances for non-direct and ventilated combustion air systems.
Requirements and CO hazards specific to direct vent systems.
Diagrams showing combustion air pipe attachment and vent pipe routing.
Detailed table of clearances for direct vent terminations per codes.
Important notes and recommendations regarding vent termination clearances.
Table of clearances for ventilated and non-direct vent systems.
Factors influencing location choice and associated hazards like ice build-up.
Specific requirements and clearances for vent terminations near inside corners.
Termination requirements for 1-pipe systems, including Alberta/Saskatchewan specifics.
Guidelines for sizing vent and combustion air pipes and transition fittings.
Details on configuring the combustion air inlet pipe for moisture prevention.
Steps for installing a moisture trap in the combustion air inlet pipe.
Critical warnings and instructions specific to polypropylene venting systems.
Method for calculating total equivalent vent length, including fittings and pipe types.
Guidelines for insulating vent and combustion air piping in unconditioned spaces.
Recommendations for vent pipe connections near the furnace to prevent condensate issues.
Diagrams showing vent terminations for ventilated systems.
Table specifying maximum allowable exposed vent lengths based on insulation and temperature.
Table for exposed vent lengths in meters, accounting for insulation and temperature.
Tables providing maximum allowable vent lengths by pipe diameter, altitude, and unit size.
Table detailing deductions for various elbow and tee configurations.
Recommendations for vent pipe connections near the furnace.
Diagrams showing vent pipe routing for upflow furnace orientations.
Diagrams showing vent pipe routing for downflow furnace orientations.
Diagrams showing vent pipe routing for horizontal furnace orientations.
Diagrams and notes for horizontal vent configurations.
Procedures for installing vent and combustion air pipe adapters, including safety warnings.
Steps for assembling vent coupling and adapter with gaskets.
Critical warnings and instructions specific to polypropylene venting systems.
Table specifying hanger spacing for different vent pipe materials and diameters.
Alternative method for installing vent pipes using adapters.
Recommendations for installing vent terminations on roofs.
Steps for installing concentric vent terminations, including warnings.
Instructions for terminating 2-pipe and single-pipe systems.
Guidance for sidewall terminations, including support and recirculation avoidance.
Information on when an inducer outlet restrictor is needed.
Table listing approved pipes, fittings, primers, solvents, and cements for venting.
Example calculation for determining total equivalent vent length.
Second example calculation for venting system length with specific parameters.
Essential steps for initial furnace installation and start-up.
Caution regarding the limit switch and potential hazards.
Explanation of DIP switch functions for configuring furnace operation.
Tables showing CFM delivery for cooling and heating based on settings.
Continuation of tables detailing furnace airflow rates for various conditions.
Final part of tables showing furnace airflow rates for different settings.
Detailed explanation of each setup switch (SW1-SW4) for furnace configuration.
Steps for priming the condensate trap and related safety warnings.
Instructions for purging gas lines after connections are made.
Critical safety warnings related to gas piping.
Guidance on adjusting manifold pressure considering altitude and gas heating value, including derate tables.
Procedure for checking the furnace's inlet gas pressure.
Steps for adjusting manifold pressure and burner orifices for proper input rate.
Method for verifying furnace input rate by clocking the gas meter.
Procedure for adjusting temperature rise and associated furnace hazards.
Setting the blower off delay time for heating modes.
Adjusting blower speeds for cooling and continuous fan modes.
Procedure for adjusting the thermostat's heat anticipator using an ammeter.
Steps for verifying the proper function of safety controls.
Tables for selecting orifices and determining gas rates based on pressure and altitude.
Critical warnings for personnel performing service on the furnace.
Interpreting LED status codes and performing component self-tests.
Safety measures regarding environmental hazards and electrical safety during service.
Using the troubleshooting guide and retrieving stored fault codes for diagnostics.
Safety precautions related to the blower door interlock switch during service.
Warning against storing flammable materials near the furnace.
Recommended periodic maintenance tasks, including filter cleaning.
Steps for cleaning and maintaining the blower motor and wheel.
Procedures for removing and cleaning the blower assembly.
Steps for cleaning burners and the flame sensor, including safety warnings.
Procedures for servicing the hot surface igniter, including resistance checks.
Steps for flushing the collector box and drainage system, including electrical safety warnings.
Procedures for cleaning heat exchangers and considerations for secondary exchangers.
Reference to wiring diagrams for service.
Warnings about potential damage during winterization if procedures are not followed.
Detailed steps for winterizing the furnace using propylene glycol.
Guide for diagnosing furnace issues based on status codes and flowchart.
Flowchart steps related to control circuitry and pressure switch diagnostics.
Flowchart steps for diagnosing blower motor and control board problems.
Description of the heating sequence when using a two-stage furnace with a single-stage thermostat.
Sequences for single-speed and two-speed cooling modes with various thermostat types.
How the furnace operates in dehumidification mode.
Sequences for super-dehumidify and continuous blower modes.
Sequence of operation when the furnace is used with a heat pump.
Steps for running the furnace's component self-test.
Wiring diagram showing external connections to the furnace.
Internal wiring schematic of the furnace control system.
Guide to identifying and ordering replacement parts for the furnace.
Breakdown of the furnace model number and its components.
Information on accessing HVAC training resources.
