Bryant 312AAV/JAV instruction manual Cleaning Heat Exchanger, Igniter Position-Side View

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312AAV

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in shortened heat exchanger life.

Heating fan speed(s) MUST be adjusted to provide proper air temperature rise as specified on the rating plate. Recommended operation is at the midpoint of the rise range or slightly above. Refer to “SET TEMPERATURE RISE” under START-UP, ADJUSTMENT, and SAFETY CHECK.

14.Reinstall 2 screws securing blower assembly to blower deck.

15.Refer to furnace wiring diagram, and connect thermostat leads if previously disconnected.

16.To check blower for proper rotation:

a.Turn on electrical supply.

b.Manually close blower access door switch.

NOTE: If thermostat terminals are jumpered at the time blower access door switch is closed, blower will run for 90 sec before beginning a heating or cooling cycle.

c.Perform component self-test as shown at the bottom of the SERVICE label, located on the front of blower access door.

d.Verify blower is rotating in the correct direction.

17.If furnace is operating properly, RELEASE BLOWER ACCESS DOOR SWITCH. Remove any jumpers or re- connect any disconnected thermostat leads. Replace blower access door.

!WARNING

ELECTRICAL SHOCK HAZARD

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

Blower access door switch opens 115-v power to furnace control. No component operation can occur unless switch is closed. Exercise caution to avoid electrical shock from exposed electrical components when manually closing this switch for service purposes.

18.Downflow or horizontal furnaces with vent pipe through furnace only:

a.Install and connect short piece of vent pipe inside furnace to existing vent.

b.Connect vent connector to vent elbow.

19.Reinstall outer door.

20.Turn on gas supply and cycle furnace through one com- plete heating and cooling cycle. Verify the furnace temper- ature rise as shown in Adjustments Section. Adjust tem- perature rise as shown in Adjustments Section. If outdoor temperature is below 70_F (21_C) turn off circuit breaker to outdoor unit before running furnace in the cooling cycle. Turn outdoor circuit breaker on after completing cooling cycle.

CLEANING HEAT EXCHANGER

The following steps should be performed by a qualified service agency:

NOTE: If the heat exchangers get a heavy accumulation of soot and carbon, they should be replaced rather than trying to clean them thoroughly. A build-up of soot and carbon indicates that a

problem exists which needs to be corrected, such as improper adjustment of manifold pressure, insufficient or poor quality combustion air, incorrect size or damaged manifold orifice(s), improper gas, or a restricted heat exchanger. Action must be taken to correct the problem.

If it becomes necessary to clean the heat exchangers because of dust or corrosion, proceed as follows:

1.Turn OFF gas and electrical power to furnace.

2.Remove outer access door.

3.Disconnect vent connector from furnace vent elbow.

4.For downflow or horizontal furnace having an internal vent pipe, remove internal vent pipe within the casing.

5.Disconnect wires to the following components. Mark wires to aid in reconnection of (be careful when discon- necting wires from switches because damage may occur):

a.Draft safeguard switch.

b.Inducer motor.

c.Pressure switches.

d.Limit overtemperature switch.

e.Gas valve.

f.Hot surface igniter.

g.Flame-sensing electrode

h.Flame rollout switches.

6.Remove screws that fasten the collector box assembly to the cell panel. Be careful not to damage the collector box. Inducer assembly and elbow need not be removed from collector box.

7.Disconnect gas line from gas manifold.

8.Remove the 5 screws that attach the burner assembly to the cell panel. The gas valve and individual burners need not be removed from support assembly. Remove NOx baffles if installed.

NOTE: Be very careful when removing burner assembly to avoid breaking igniter. See Fig. 53 and 54 for correct igniter location.

A05025

Fig. 53 - Igniter Position-Side View

9.Using field-provided 25-caliber rifle cleaning brush, 36-in. (914 mm) long 1/4-in. (6 mm) diameter steel spring cable, a variable speed, reversible electric drill, and vacuum cleaner, clean cells as follows:

a.Remove metal screw fitting from wire brush to allow in- sertion into cable.

b.Insert the twisted wire end of brush into end of spring cable, and crimp tight with crimping tool or crimp by

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Contents Service and Maintenance Procedures 312AAV Safety Considerations IntroductionFurnace Reliability Hazard CUT HazardClearances to Combustibles Electrostatic Discharge ESD Precautions Procedure Codes and StandardsLocation GeneralCarbon Monoxide Poisoning and Unit Damage Hazard AIR for Combustion Ventilation FIRE, Injury or Death HazardFire Hazard Property Damage HazardFurnace Corrosion Hazard Carbon Monoxide Poisoning HazardOutdoor Combustion Air Method Air for Combustion, Ventilation, and Dilution for Outdoors Installation Upflow InstallationDownflow Installation Horizontal InstallationFIRE, EXPLOSION, and Carbon Monoxide Poisoning Hazard Suspended Furnace SupportPlatform Furnace Support Roll-Out ProtectionOpening dimensions In. mm Duct FlangesHorizontal Unit Suspension Filter Arrangement Carbon Monoxide Poisoning Hazard AIR DuctsGeneral Requirements Ductwork Acoustical Treatment Supply Air ConnectionsAir Delivery CFM With Filter FurnaceSpeed External Static Pressure IN. W.C Size Inlet Air Delivery CFM With Filter* Downflow FurnacesReturn Air Connections GAS Piping Fire or Explosion HazardUpflow Return Air Configurations and Restrictions Maximum Capacity of Pipe Furnace Damage HazardWiring Electrical Shock and Fire HazardElectrical Connections Electrical Shock Hazard Furnace MAY not Operate HazardElectrical Data BOX RelocationElectrical Connection to J-BOX Electrical Box on Furnace Casing Side. See FigPower Cord Installation in Furnace J-BOX BX. Cable Installation in Furnace J-BOXTwo-Stage Furnace with Two-Speed Air Conditioner For Figures Accessories VentingGeneral Venting Requirements Masonry Chimney RequirementsChimney Inspection Chart Appliance Application Requirements Internal Area of ChimneyVent Height Upflow Application-Vent Elbow Up Additional Venting RequirementsDownflow Application-Vent Elbow Up then Left Horizontal Left Application Vent Elbow Left Venting Notes for Furnace VentDiameter Vent Height Orientation INPUTBTUH/HR START-UP, ADJUSTMENT, and Safety Check GeneralBurn Hazard Start-Up Procedures AdjustmentsStage Furnace Setup Switch Description Fire and Explosion HazardAltitude Derate Multiplier for U.S.A Redundant Automatic Gas Control ValveOrifice Hole Gas Rate cu ft. /hr Furnace Overheating HazardSeconds Size of Test Dial For Revolution Speed Selection Color Speed AS ShippedCheck Safety Controls ChecklistStage Furnace Blower OFF delay Setup Switch Desired Heating Mode Setup Switch Blower OFF Delay SECA10184 A10184A A10185 A10185A Service and Maintenance Procedures IntroductionCare and Maintenance Carbon Monoxide Poisoning and Fire HazardWiring Diagram Cleaning AND/OR Replacing AIR Filter Filter Size Information In. / MmBlower Motor and Wheel Electrical Shock Hazard Cleaning Heat Exchanger Igniter Position-Side ViewSequence of Operation Igniter Position-Top View312AAV Single-Stage Thermostat and Two-Speed Cooling Adaptive Mode Thermidistat ModeSingle-Speed Cooling Wiring Diagrams TroubleshootingContinuous Blower Mode Troubleshooting Guide 2-Speed KitAdapter Chimneyin Usedswitch Shutoffvent Blocked Accessory List Description Part NumberParts Replacement Information Guide

312AAV/JAV specifications

The Bryant 312AAV/JAV is a prominent member of Bryant's series of high-efficiency air conditioning units, known for its reliability and advanced technology. Designed for residential and light commercial applications, this model combines exceptional performance with energy-efficient operation, making it a favorite among homeowners and builders alike.

One of the standout features of the 312AAV/JAV is its high SEER (Seasonal Energy Efficiency Ratio) rating, which allows users to enjoy significant savings on their energy bills. With a focus on energy efficiency, this unit minimizes electricity consumption while providing effective cooling throughout the hottest months. Its two-stage compressor technology not only enhances energy savings but also ensures consistent comfort by adjusting its operation to match the specific cooling needs of the space.

The Bryant 312AAV/JAV is equipped with Wi-Fi connectivity capabilities, allowing homeowners to control their cooling system remotely through a smartphone app. This feature adds a layer of convenience, enabling users to adjust settings, receive alerts, and track energy usage for optimal management of their home environment. Additionally, the unit’s compatibility with Smart Thermostats enhances its efficiency, facilitating further integration into a modern smart home setup.

Built for durability, the Bryant 312AAV/JAV features a robust construction that includes a galvanized steel cabinet designed to withstand harsh weather conditions. The rust-resistant finish not only prolongs the life of the unit but also ensures it maintains a sleek, attractive appearance. Quiet operation is another hallmark of this model; it operates at a low noise level, providing comfort without disruptive sound.

Moreover, this model employs environmentally friendly refrigerants, aligning with modern standards for eco-friendly cooling solutions. The 312AAV/JAV is designed with filters that provide superior air quality by effectively capturing dust and allergens, contributing to a healthier indoor environment.

In summary, the Bryant 312AAV/JAV air conditioning unit represents a blend of efficiency, technology, and durability. With its impressive energy-saving capabilities, smart connectivity, silent operation, and high-quality construction, it stands out as a top choice for those seeking reliable cooling solutions for their homes or light commercial settings. Whether for new installations or replacements, the 312AAV/JAV is designed to deliver exceptional performance while prioritizing comfort and sustainability.
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