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Need help?Do you have a question about the HEIL G8MVL and is the answer not in the manual?
Explains signal words like WARNING/CAUTION used in manuals.
Describes signal words used on product labels with colors/pictures.
Warns of hazards from improper installation or unqualified persons.
Severe hazards from improper installation/service causing injury or death.
Warns of component damage from improper application or installation.
Alerts to personal injury from sharp sheet metal edges.
Explains safety symbols and signal words like DANGER, WARNING, CAUTION.
Specifies minimum clearances required for furnace installation near combustible materials.
Details installation requirements for downflow configurations on combustible flooring.
Emphasizes compliance with national, local codes, and manufacturer instructions.
Covers general installation practices and references to codes and standards.
Specifies requirements for providing adequate air for combustion and ventilation.
Details duct systems, gas piping, electrical connections, and venting requirements.
Provides procedures to prevent damage to electronic components from static discharge.
Lists scenarios requiring outdoor air for combustion due to chemical exposure.
Specific safety requirements for installing furnaces in residential garages.
Guidance on positioning the furnace relative to cooling equipment to prevent condensation.
Conditions and requirements for using the furnace in buildings under construction.
Warns of furnace damage from air contaminants like halogen compounds.
Warns of CO poisoning risk due to negative pressure from ventilation devices.
Details requirements for providing outdoor air for combustion and ventilation.
Warns of CO poisoning risk due to negative pressure from ventilation devices.
Explains the Standard and Known Air Infiltration Rate methods for calculating combustion air.
Instructions for removing the bottom closure panel for bottom return air.
Notes on using the bottom closure panel for side return air.
Guidance on installing optional leveling legs for furnace positioning.
Details furnace installation requirements for downflow applications.
Covers methods for supporting the furnace via suspension or platform.
Describes the installation of flame roll-out protection.
Safety warnings and considerations for horizontal furnace installations.
Covers filter installation and safety warnings related to its operation.
Outlines general requirements for designing and sizing duct systems.
Details how to connect supply air ducts to the furnace or coil casing.
Illustrates typical installation procedures for furnaces in attics.
Specifies how to connect supply-air ducts for downflow furnaces.
Specifies proper connection methods for return air ducts for different furnace orientations.
Warns about hazards related to gas piping installation and testing.
Warns of shock and fire risks from improper electrical connections and grounding.
Warns that improper grounding can lead to intermittent furnace operation.
Details voltage, frequency, phase, and code compliance for 115-V wiring.
Warns against aluminum wire and emphasizes separate circuits and disconnects.
Details the process for relocating the J-Box to a desired position.
Provides steps for making electrical connections to the J-Box.
Covers installation procedures for power cords and BX cables in the J-Box.
Details 24-V wiring and connections for accessories like EAC and humidifiers.
Outlines requirements for connecting the furnace to vent systems.
Warns of CO poisoning hazard related to venting system issues.
General safety codes and requirements for proper vent sizing and installation.
Specifies requirements for using Type B vent connectors with the furnace.
Provides a flowchart for inspecting chimneys for suitability with the furnace.
Details requirements for using masonry chimneys with the furnace.
Discusses how appliance operation impacts venting system performance.
Lists precautions to prevent condensation and corrosion in the furnace and vent system.
Warns of burn hazard from hot vent pipe in downflow position.
Specifies requirements for vent connectors and adapters.
Alerts to personal injury from sharp sheet metal edges during maintenance.
States furnace is not approved for direct sidewall horizontal venting.
General instructions for start-up, adjustment, and safety checks.
Warns about bypassing limit switches and potential overheating.
Details start-up steps and associated fire/explosion and electrical shock hazards.
Warns about hazards from improper gas valve adjustment or orifice modification.
Explains the function of various setup switches (SW1) on the furnace control.
Explains the service label, LED codes, and status codes for diagnostics.
Details the procedure for performing a component test sequence.
Warns about electrical hazards during service and general operation.
Guides on how to determine the correct gas input rate based on altitude and heat value.
Details the process for adjusting orifice size and manifold pressure for proper gas input.
Provides steps to adjust the manifold pressure for low fire input rate.
Provides steps to adjust the manifold pressure for high fire input rate.
Guides on how to set and measure the furnace's temperature rise.
Warns of damage from incorrect temperature rise and overheating.
Warns about gas leaks when reinstalling manifold pressure tap plug.
Details how to set airflow for single-stage cooling operations.
Explains how to set airflow for continuous fan and low-speed cooling.
Procedure to check the function of the main limit switch.
Procedure to verify the draft safeguard switch is functioning correctly.
General warnings about performing maintenance on this equipment.
Caution regarding proper disposal of components to prevent environmental pollution.
Warnings about electrical hazards during service and maintenance.
Warns that wiring errors can cause improper operation or failure.
General guidance on servicing electrical controls and wiring.
Details the procedure for initiating and running the component self-test.
Provides critical warnings regarding fire, explosion, shock, and CO hazards during maintenance.
Lists essential monthly and seasonal maintenance tasks for the furnace.
Provides information on filter sizes and how to clean/replace them.
Alerts to personal injury from sharp sheet metal edges during maintenance.
Details procedures for cleaning the blower motor and wheel.
Provides step-by-step instructions for cleaning the heat exchanger cells.
Warns about electrical shock hazards when performing service.
Emphasizes the importance of furnace control grounding for proper operation.
Details the operation of the furnace in two-stage heating modes with different thermostats.
Explains the furnace operation during single-speed and two-speed cooling cycles.
Describes how the furnace operates when a dehumidify demand is present.
Details the inducer prepurge and igniter warm-up process during heating cycles.
Explains the trial-for-ignition sequence, including flame proving and blower operation.
Describes blower delays and transitions between heating modes.
Explains furnace operation during cooling and dehumidify cycles.
Details operation in continuous blower mode and with heat pumps.
Covers component test procedures and refers to the wiring diagram.
Introduces the troubleshooting guide for diagnosing furnace problems.
Checks for power, door switch, fuses, and LED status.
Guides on recalling status codes and checking thermostat signal response.
Addresses issues with pressure switches and limit circuits.
Troubleshoots abnormal flame signals and ignition failures.
Diagnoses blower motor faults and invalid model selection errors.
Addresses lockout conditions, gas heating lockouts, and polarity checks.
Guides on diagnosing blower motor faults using voltage checks.
Lists various groups of replacement parts for furnace components.
Explains how to identify the furnace model number based on its configuration.
General| Model | G8MVL |
|---|---|
| Ignition Type | Direct Spark Ignition |
| Heating Capacity | 40, 000 to 120, 000 BTU/h |
| Fuel Type | Natural Gas or Propane |
| Warranty | 10-Year Parts Limited Warranty |
