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General| Efficiency | 80% AFUE |
|---|---|
| Blower Type | Variable Speed |
| Energy Star Certified | No |
| Fuel Type | Natural Gas |
| Vent Type | Conventional |
| Heating Capacity | 44, 000 to 132, 000 BTUH |
| Warranty | Limited lifetime heat exchanger warranty, 5-year parts warranty |
Details the contents of the furnace package and items available separately.
Provides critical safety warnings regarding installation, operation, and potential hazards.
Lists furnace certifications and required installation clearances to combustible materials.
Guidance on suitable installation locations and integration with cooling units.
Conditions for using the furnace as a temporary construction heater.
General advice for proper furnace placement and installation practices.
Methods for supplying combustion air from adjacent spaces within a confined area.
Methods for supplying combustion air directly from the outdoors to a confined area.
Procedure for installing the furnace on a non-combustible floor surface.
Procedure for installing the furnace on a combustible floor using a base.
Guidance for installing the furnace onto a cooling cabinet.
Guidelines for selecting the furnace location and required clearances.
Instructions for connecting the return air plenum to the downflow unit.
Specific clearance requirements for downflow installation configurations.
Information on required filters and recommended sizes for proper operation.
Standards for sizing and installing supply and return air duct systems.
Guidelines for proper venting system sizing, installation, and termination.
Guidelines for common venting with tile-lined masonry chimneys.
Additional requirements for venting a furnace into a lined masonry chimney.
Procedures for safely removing a furnace from a shared venting system.
Guidelines for connecting the gas supply line, including pipe sizing and routing.
Steps for performing a gas leak test after piping installation.
Instructions for power supply wiring, grounding, and ESD precautions.
Details on non-communicating and communicating thermostat operations.
Configuration of indoor blower speeds for heating and cooling modes.
Specifications for using generators with the furnace, including voltage and waveform.
Illustrations of wiring configurations for icomfort Touch® thermostats.
Wiring configurations for conventional thermostats based on system stages.
Explanation of the integrated control, DIP switches, and on-board links.
Details on RS-BUS communication links and terminal functions.
Explanation of thermostat connection terminals and their functions.
Configuration of DIP switches for heating operation and thermostat selection.
Configuration of DIP switches for cooling mode blower speeds.
Details on specific on-board links for system configuration (Dehum, Heat Pump, Stage).
Explanation of diagnostic LED codes and push button operation for troubleshooting.
Blower speed and airflow data for specific SL280DFV models.
Blower speed and airflow data for specific SL280DFV models.
Critical safety steps to follow before initiating furnace startup.
Step-by-step instructions for operating the gas valve and lighting the furnace.
Procedures for checking gas flow rate and supply/manifold pressures.
Guidance on measuring gas supply line pressure.
Procedures for checking and adjusting manifold gas pressure.
Guidelines for ensuring proper combustion by checking CO2 levels.
Information on adjusting and checking safety limits, pressure switches, and temp rise.
Detailed steps of the furnace's heating operation sequence.
Heating sequence when using a two-stage thermostat.
Heating sequence when using a single-stage thermostat.
Routine maintenance checks for the blower, filters, flue, and chimney.
Electrical system checks and procedures for cleaning internal components.
Checklist for annual furnace inspection to ensure safe operation.
List of available replacement parts for the furnace.
How to access and interpret diagnostic modes and display indicators.
List and explanations of error codes generated by the integrated control.
