Bryant 355CAV Fire or Death Hazard, Hazardous Locations, FIRE, EXPLOSION, Injury or Death Hazard

Page 17

!CAUTION

UNIT DAMAGE HAZARD

This gas furnace may be used for construction heat provided that:

-The furnace is permanently installed with all electrical wiring, piping, air filters, venting and ducting installed according to these installation instructions. A return air duct is provided, sealed to the furnace casing, and terminated outside the space containing the furnace. This prevents a negative pressure condition as created by the circulating air blower, causing a flame rollout and/or drawing combustion products into the structure.

-The furnace is controlled by a thermostat. It may not be “hot wired” to provide heat continuously to the structure without thermostatic control.

-Clean outside air is provided for combustion. This is to minimize the corrosive effects of adhesives, sealers and other construction materials. It also prevents the entrainment of drywall dust into combustion air, which can cause fouling and plugging of furnace components.

-The temperature of the return air to the furnace is maintained between 55_F (13_C) and 80_F (27_C), with no evening setback or shutdown. The use of the furnace while the structure is under construction is deemed to be intermittent operation per our installation instructions.

-The air temperature rise is within the rated rise range on the furnace rating plate, and the firing rate has been set to the nameplate value.

-The filters used to clean the circulating air during the construction process must be either changed or thoroughly cleaned prior to occupancy.

-The furnace, ductwork and filters are cleaned as necessary to remove drywall dust and construction debris from all HVAC system components after construction is completed.

-After construction is complete, verify furnace operating conditions including ignition, input rate, temperature rise and venting, according to the manufacturer’s instructions.

!WARNING

FIRE OR DEATH HAZARD

Failure to follow this warning could result in property damage, personal injury, or death.

Do not install furnace on its back. (See Fig. 16.) Safety control operation will be adversely affected. Never connect return-air ducts to back of furnace.

The furnace and its return air system shall be designed and installed so that negative pressure created by the air circulating fan cannot affect another appliance’s combustion air supply or act to mix products of combustion with circulating air, and that the air circulating fan of the furnace, if installed in an enclosure communicating with another fuel-burning appliance not of the direct-vent type, shall be operable only when any door or panel covering an opening in the furnace fan compartment or in a return air plenum on ducts is in the closed position.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in minor property or unit damage.

If these furnaces are installed in an unconditioned space where ambient temperatures may be 32_F (0_C) or lower, freeze protection measures must be taken. See Condensate Drain Protection section and Fig. 17.

355CAV

A07911

Fig. 17 - Freeze Protection

Furnace Location Relative to Cooling Equipment

The cooling coil must be installed parallel with or on downstream side of furnace to avoid condensation in heat exchanger. When installed parallel with a furnace, dampers or other means used to control flow of air shall be adequate to prevent chilled air from entering furnace. If dampers are manually operated, they must be equipped with a means to prevent operation of either unit unless damper is in full-heat or full-cool position.

Hazardous Locations

!WARNING

FIRE, EXPLOSION, INJURY OR DEATH

HAZARD

Improper location or inadequate protection could result in fire or explosion.

When furnace is installed in a residential garage, it must be installed so that burners and ignition sources are located a minimum of 18 in. (457 mm) above floor. The furnace must be located or protected to avoid physical damage by vehicles. When furnace is installed in a public garage, airplane hangar, or other building having a hazardous atmosphere, unit must be installed in accordance with requirements of National Fire Protection Association, Inc. (See Fig. 5.)

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Contents Installation Instructions Required Notice for Massachusetts Installations Safety Considerations Table of ContentsEnvironmental Hazard Dimensions In. / mm355CAV Clearances to Combustibles Codes and Standards Electrostatic Discharge ESD PrecautionsIntroduction Unit Damage HazardProperty Damage Hazard ApplicationsUpflow Application Condensate Trap Tubing Alternate Upflow Orientation Condensate Trap Alternate Upflow OrientationCarbon Monoxide Poisoning Hazard Condensate Trap Freeze Protection Upper Inducer Housing Drain ConnectionCondensate Trap Field Drain Attachment Condensate Trap Location Downflow ApplicationsHorizontal Left SUPPLY-AIR Discharge Applications Horizontal Left Tube ConfigurationCombustion AIR Intake Vent Unit Operation Hazard Property Damage Construct a Working Platform Condenste Trap Field Drain Attachment Horizontal Right SUPPLY-AIR Discharge ApplicationsLocation Prohibit Installation on BackFIRE, EXPLOSION, Injury or Death Hazard Fire or Death HazardHazardous Locations Installation in Upflow or Downflow Applications InstallationInstallation in Horizontal Applications Leveling Legs If DesiredFurnace, Plenum, and Subbase Installed on a Angle AIR Ducts Unit MAY not Operate Fire HazardFIRE, Carbon Monoxide and Poisoning Hazard Fire or Explosion Hazard Gas PipingRemoving Bottom Closure Panel Electrical Shock Hazard WiringElectrical Shock and Fire Hazard Disconnect Switch and FurnaceRemoval of Existing Furnaces from Common Vent Systems AccessoriesFire or Electrical Shock Hazard Fire and Explosion Hazard AIR for Combustion and VentilationPipe Fittings Cement Description Marked on Primers Combustion-Air and Vent Pipe DiameterFurnace Control Direct Vent Termination Clearance Ventilated Combustion Air Vent Termination Clearance Vent Pipe Termination for Ventilated Combustion Air System Unit Corrosion Hazard Combustion AIR PipeCombustion Air Termination Ventilated Combustion Air Option Attachment of Combustion Air Intake Housing Plug FittingCombustion Air Termination-Direct Vent / 2-Pipe System Vent PipeCarbon Monoxide Poisoning Property Damage Hazard Attachment of Vent Pipe304.8mm minimum 76.2mm minimum Extended Exposed Sidewall Pipes Vent TerminationVent Termination Kit Direct Vent / 2-Pipe System Only Two-Pipe Termination Kit Direct Vent / 2-Pipe System OnlyWinter Design Number of 90 Elbows Btuh Maximum Allowable Pipe Length Ft MDirect Vent 2-Pipe Only Multi-venting and Vent Terminations Condensate DrainApplication Personal Injury HazardAir Conditioning A/C Setup Switches START-UP, Adjustment and Safety CheckContinuous Fan CF Setup Switches Additional Setup Switches SW4Prime Condensate Trap with Water Example of Setup Switch in Off PositionWiring Diagram Furnace Setup Switch Description Inducer Housing Drain TubePurge Gas Lines Sequence of OperationTwo-Stage Thermostat and Two-Stage Medium/High Heating Two-Stage Thermostat and Two-Stage Low / High HeatingThermidistat Mode Continuous Blower Mode Super Dehumidify ModeContinuous Blower Speed Selection from Thermostat Heat PumpStep-Modulating Furnace with Single-Speed Air Conditioning Furnace and Two-Speed Heat Pump Pump Furnace and Two-Speed Air ConditionerRedundant Automatic Gas Valve Set Gas Input RateBurner Orifice Altitude AVG. GAS 675 Burner Flame Altitude Derate Multiplier for USASet Thermostat Heat Anticipator Set Temperature RiseGas Rate cu Ft/Hr Check Safety Controls ChecklistCheck Pressure Switches Check Primary Limit ControlCombustion and Vent Piping Checklist InstallationCatalog No. II355CAV---060---4
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