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General| Model | 987MA |
|---|---|
| Heating Capacity | 40, 000 - 120, 000 BTU/h |
| Stages | Modulating |
| Fuel Type | Natural Gas |
| Blower Type | Variable Speed |
| Blower Motor | ECM |
| Heat Exchanger | Stainless Steel |
General safety precautions and warnings for installation and operation.
Provides an overview of the furnace features and applications.
Lists national and local codes for installation compliance.
Details precautions to prevent damage to electronic components from static discharge.
Explains requirements for air supply for proper combustion and ventilation.
Instructions for handling and installing the condensate trap.
Details how to connect and route the condensate drain line.
Covers general installation procedures for the furnace.
Guidelines for connecting and sizing air ducts.
Instructions for safe and compliant gas piping installation.
Details on making correct electrical connections for the furnace.
Provides instructions for proper venting system installation and configuration.
Covers procedures for initial startup, adjustments, and safety checks.
Highlights important regulatory requirements for Massachusetts installations.
Major safety warnings concerning fire, explosion, electrical shock, and carbon monoxide.
Specific warnings about fire hazards related to solvents and combustible materials.
Cautions regarding potential damage to furnace components due to improper handling.
Warning about sharp edges on sheet metal parts and the need for protective gear.
Explains the meaning of the safety-alert symbol and signal words (DANGER, WARNING, CAUTION).
Lists essential installation requirements for safe and proper furnace operation.
Lists safety codes like NFGC and NFPA 90B for US and Canada.
Lists general installation standards like NFGC, NFPA 90B for US and Canada.
Specifies codes related to air for combustion and ventilation.
Lists standards for duct system design and sizing.
Mentions standards for duct lining and fibrous glass ducts.
Details codes for gas piping installation and pressure testing.
Lists specific requirements for installations within Massachusetts.
Lists electrical codes like NEC and CSA for connections.
Specifies codes for condensate drain connections.
Cautions to prevent damage to electronic components from static discharge.
Important considerations for choosing the furnace location.
Warnings about hazards associated with improper location choice for the furnace.
Specific warnings for installing the furnace in a residential garage.
Warnings about corrosive air contaminants and their effect on furnace components.
Warning against installing the furnace on its back or with the control compartment facing downward.
Introduces the section on air for combustion and ventilation requirements.
Details air requirements for direct vent (2-pipe) installations.
Explains air requirements for ventilated combustion air systems.
Caution regarding corrosive air contaminants and furnace damage.
Warning about negative pressure conditions and make-up air.
Describes methods for providing outdoor air for combustion and ventilation.
Instructions for condensate trap in upflow installation.
Instructions for relocating the condensate trap in downflow orientation.
Instructions for repositioning the condensate trap in horizontal orientations.
Notes the requirement for a drain trap grommet for direct vent applications.
Notes required clearance for the condensate trap in horizontal position.
Step-by-step guide for relocating the condensate trap.
Warnings about protecting the drain line from freezing.
Cautions regarding potential property damage from frozen drain lines or pumps.
Instructions for routing the condensate drain to the right side.
Instructions for routing the condensate drain to the left side.
Notes the furnace's certified leakage rate for AC CFM.
Provides instructions for installing the furnace in an upflow orientation.
Explains how to prepare the bottom return air opening.
Details the use of side return air inlets and panel requirements.
Instructions for installing leveling legs for furnace stability.
Hazards associated with incorrect furnace orientation.
Caution regarding drain pans for attic installations.
Guidelines for supporting the furnace on a platform.
Instructions for supporting the furnace when suspended.
Requirements for flame roll-out protection.
Critical warnings about operating without a filter or with access doors removed.
Emphasizes designing the duct system first to determine filter pressure drop allowance.
Guidance on sizing filters and return ducts based on pressure drop.
Major warnings regarding fire and explosion hazards related to gas piping.
Caution about avoiding damage to gas controls during connection.
Notes specific gas connection requirements for Massachusetts.
Instructions for using the gas pipe grommet for direct vent applications.
Major warnings about electrical hazards during installation and servicing.
Warning about the blower door switch and 115-v power.
Warnings about electrical grounding requirements and hazards.
Caution about proper grounding for furnace operation.
Electrical connection requirements for US installations per NEC.
Electrical connection requirements for Canadian installations per CSA.
Warning against using aluminum wire for electrical connections.
Procedure for installing the J-Box electrical connection.
Hazards associated with J-Box installation.
Instructions for installing an electrical box on the furnace casing.
Steps for installing a power cord into the J-Box.
Steps for installing BX cable into the J-Box.
Details on making field 24-v connections.
Mentions connecting accessories like electronic air cleaners and humidifiers.
Information on using alternate power supplies like generators.
Advice on planning the venting system in conjunction with other components.
Specific venting requirements for installations in Canada per CSA B149.
French instructions for Canadian venting requirements.
Critical warnings about carbon monoxide poisoning related to venting.
General notes regarding furnace replacement and vent systems.
Specifies approved materials for vent pipes, fittings, primers, and solvents.
Describes direct vent and ventilated combustion air venting systems.
Warnings about carbon monoxide poisoning for all venting configurations.
Recommendations for supporting vent terminations.
Instructions for installing vent terminations through the roof.
Details for installing concentric vent terminations.
Instructions for terminating direct vent and ventilated combustion air systems.
Recommendations for supporting vent terminations.
Instructions for terminating vents on sidewalls.
Instructions for installing concentric vent terminations on sidewalls.
General notes on sizing vent and combustion air pipes.
Notes about optional combustion air inlet pipe configurations.
Information on installing a moisture trap in the combustion air inlet pipe.
Notes regarding polypropylene venting systems and their equivalent lengths.
Guidelines for insulating combustion air and vent piping.
Procedure for configuring the furnace settings.
Warnings about carbon monoxide poisoning during furnace configuration.
States that specific techniques are only for PVC/ABS DWV vent piping.
Procedure for installing vent pipe and combustion air pipe adapters.
Warnings about carbon monoxide from improper adapter installation.
Warning against using cement with polypropylene venting systems.
Notes that all materials for polypropylene systems must be from the same manufacturer.
Notes on initial startup procedures and potential smoke/odor.
General steps for startup, including power supply and thermostat connections.
Caution regarding intermittent operation or dissatisfaction due to improper setup.
Explains the purpose and location of setup switches for configuration.
Details the function of SW1 setup switches for furnace operation.
Explains SW2 switches for matching furnace airflow to cooling units.
Details SW3 switches for continuous fan or low-cooling airflow.
Explains additional SW4 switches for heat stages and airflow adjustment.
Warnings about carbon monoxide from improper trap priming.
Caution regarding improper draining or priming of the condensate trap.
Procedure for purging gas lines after connections are made.
Warnings about fire and explosion hazards when purging gas lines.
Caution to prevent furnace damage from improper adjustments.
Warning about potential damage from forcing gas valve adjusting screws.
Caution about not redrilling orifices to avoid damage.
Notes on gas input rate, altitude derating, and heating value.
Steps for adjusting manifold pressure for maximum heat operation.
Notes on the acceptable range for maximum heat manifold pressure.
Steps for adjusting manifold pressure for minimum heat operation.
Procedure for verifying gas input rate by clocking the meter.
Warning about reinstalling the manifold pressure tap plug to prevent gas leaks.
Cautions to prevent furnace damage from overheating or component damage.
Steps to lock the furnace into minimum heat operation for adjustment.
Steps to lock the furnace into intermediate heat operation for adjustment.
Steps to lock the furnace into maximum heat operation for adjustment.
Warning about reinstalling the manifold pressure tap plug.
Major safety warnings for service and maintenance personnel.
Caution regarding proper disposal of components.
Warnings about electrical hazards during installation, modification, or servicing.
Caution about improper furnace operation due to wiring errors.
General notes for service procedures and furnace orientation.
Details on electrical controls, wiring, and troubleshooting.
Warnings about electrical supply and polarity.
Guidance on troubleshooting furnace operation problems using status codes.
Steps to retrieve stored fault codes from the furnace control.
Warnings about electrical shock when manually closing the blower door switch.
Procedures for routine care and maintenance of the furnace.
Warnings about storing flammable materials near the furnace.
Safety precautions before performing maintenance or service.
Warnings about operating without a filter or with access doors removed.
Warning about sharp edges on sheet metal parts.
Steps for cleaning or replacing the air filter.
Warnings about operating without a filter or with access doors removed.
Safety precautions before performing filter maintenance.
Safety precautions before servicing burners.
Safety precautions before servicing burners.
Safety precautions before flushing the collector box and drainage system.
Steps for cleaning the condensate drain and trap.
Safety precautions before servicing heat exchangers.
Safety precautions before servicing heat exchangers.
Cautions regarding freezing and property damage during winterization.
Cautions to prevent component damage from ethylene glycol.
Flowchart to diagnose furnace operational issues based on status codes.
Caution regarding intermittent unit operation.
Explains operation with communicating controls and adaptive heating modes.
Details operation with single-stage thermostats and adaptive heating.
Explains operation with two-stage thermostats for heating.
Describes the transition from maximum to intermediate heat operation.
Explains how the furnace operates in cooling mode.
Details single-speed cooling operation with thermostats.
Explains adaptive mode for two-speed cooling with single-stage thermostats.
Describes the transition from maximum to intermediate heat operation.
Describes the transition from maximum to minimum heat operation.
Explains how the furnace operates in cooling mode.
Details single-speed cooling operation with thermostats.
Explains adaptive mode for two-speed cooling with single-stage thermostats.
Explains adaptive mode for two-speed cooling with single-stage thermostats.
Explains two-stage thermostat control for two-speed cooling.
Explains the dehumidification mode of operation.
Explains the super dehumidify mode of operation.
Details the operation of the continuous blower mode.
How to select continuous blower speed using the thermostat.
Explains furnace operation when used with a heat pump.
Refers to page 79 for component self-test instructions.
Refers to page 79 for component self-test instructions.
Instructions on how to obtain replacement parts.
Explains the model nomenclature for identification.
Major warnings regarding hazardous operation from improper parts.
