Bryant 312AAV/JAV Check Safety Controls, Checklist, Stage Furnace Blower OFF delay Setup Switch

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Table 14 – 2-Stage Furnace Blower OFF delay Setup Switch

DESIRED HEATING MODE

SETUP SWITCH

SETUP SWITCH

BLOWER OFF DELAY (SEC.)

SW---2

SW---3

90

OFF

OFF

120

OFF

ON

150

ON

OFF

180

ON

ON

THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED (ANITICIPATOR, CLOCK, ETC.,

MUST BE OUT OF CIRCUIT.)

HOOK-AROUND AMMETER

R Y W G

10 TURNS

FROM UNIT 24-V

CONTROL TERMINALS

EXAMPLE:

5.0 AMPS ON AMMETER

=

0.5 AMPS FOR THERMOSTAT

10 TURNS AROUND JAWS

ANTICIPATOR SETTING

 

 

A96316

Fig. 50 - Amp. Draw Check with Ammeter

Step 4 — Check Safety Controls

The flame sensor, gas valve, and pressure switch were all checked in the Start-up procedure section as part of normal operation.

1.Check Main Limit Switch(es)

This control shuts off combustion system and energizes air-circulating blower motor, if furnace overheats. By us- ing this method to check limit control, it can be established that limit is functioning properly and will operate if there is a restricted return-air supply or motor failure. If limit control does not function during this test, cause must be determined and corrected.

a.Run furnace for at least 5 minutes.

b.Gradually block off return air with a piece of cardboard or sheet metal until the limit trips.

c.Unblock return air to permit normal circulation.

d.Burners will re-light when furnace cools down.

2.Check draft safeguard switch.

The purpose of this control is to cause the safe shutdown of the furnace during certain blocked vent conditions.

a.Verify vent pipe is cool to the touch.

b.Disconnect power to furnace and remove vent connector from furnace vent elbow.

c.Restore power to furnace and set room thermostat above room temperature.

d.After normal start-up, allow furnace to operate for 2 minutes, then block vent elbow in furnace 80% of vent area with a piece of flat sheet metal.

e.Furnace should cycle off within 2 minutes. If gas does not shut off within 2 minutes, determine reason draft safe-

guard switch did not function properly and correct condi- tion.

f.Remove blockage from furnace vent elbow.

g.Switch will auto-reset when it cools.

h.Re-install vent connector.

NOTE: Should switch remain open longer than 3 minutes, furnace control board will lockout the furnace for 3 hours. To reset furnace control board, turn thermostat below room temperature or from HEAT to OFF and turn 115-v power OFF, then back ON.

3.Check Pressure Switch(es)

This control proves operation of the draft inducer blower.

a.Turn off 115-v power to furnace.

b.Disconnect inducer motor lead wires from wire harness.

c.Turn on 115-v power to furnace.

d.Set thermostat to “call for heat” and wait 1 minute. When pressure switch is functioning properly, hot surface ig- niter should NOT glow and control diagnostic light flashes a status code 32. If hot surface igniter glows when inducer motor is disconnected, shut down furnace imme- diately.

e.Determine reason pressure switch did not function prop- erly and correct condition.

f.Turn off 115-v power to furnace.

g.Reconnect inducer motor wires, replace outer door, and turn on 115-v power.

h.Blower will run for 90 seconds before beginning the call for heat again.

i.Furnace should ignite normally.

Step 5 — Checklist

1.Put away tools and instruments. Clean up debris.

2.Verify that switches for LHT and OFF-DELAY are blower OFF-DELAY are selected as desired.

3.Verify that blower and burner access doors are properly in- stalled.

4.Cycle test furnace with room thermostat.

5.Check operation of accessories per manufacturer￿fs in- structions.

6.Review User’s Guide with owner.

7.Attach literature packet to furnace.

312AAV

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Contents Service and Maintenance Procedures 312AAV CUT Hazard Safety ConsiderationsIntroduction Furnace Reliability HazardClearances to Combustibles Codes and Standards Electrostatic Discharge ESD Precautions ProcedureLocation GeneralCarbon Monoxide Poisoning and Unit Damage Hazard Property Damage Hazard AIR for Combustion VentilationFIRE, Injury or Death Hazard Fire HazardFurnace Corrosion Hazard Carbon Monoxide Poisoning HazardOutdoor Combustion Air Method Air for Combustion, Ventilation, and Dilution for Outdoors Upflow Installation InstallationSuspended Furnace Support Downflow InstallationHorizontal Installation FIRE, EXPLOSION, and Carbon Monoxide Poisoning HazardRoll-Out Protection Platform Furnace SupportDuct Flanges Opening dimensions In. mmHorizontal Unit Suspension Ductwork Acoustical Treatment Supply Air Connections Filter Arrangement Carbon Monoxide Poisoning HazardAIR Ducts General RequirementsAir Delivery CFM With Filter FurnaceSpeed External Static Pressure IN. W.C Size Inlet GAS Piping Fire or Explosion Hazard Air Delivery CFM With Filter*Downflow Furnaces Return Air ConnectionsUpflow Return Air Configurations and Restrictions Furnace Damage Hazard Maximum Capacity of PipeFurnace MAY not Operate Hazard WiringElectrical Shock and Fire Hazard Electrical Connections Electrical Shock HazardElectrical Box on Furnace Casing Side. See Fig Electrical DataBOX Relocation Electrical Connection to J-BOXBX. Cable Installation in Furnace J-BOX Power Cord Installation in Furnace J-BOXTwo-Stage Furnace with Two-Speed Air Conditioner For Figures Venting AccessoriesMasonry Chimney Requirements General Venting RequirementsChimney Inspection Chart Appliance Application Requirements Internal Area of ChimneyVent Height Additional Venting Requirements Upflow Application-Vent Elbow UpDownflow 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 Fire and Explosion Hazard Start-Up ProceduresAdjustments Stage Furnace Setup Switch DescriptionRedundant Automatic Gas Control Valve Altitude Derate Multiplier for U.S.AOrifice Hole Gas Rate cu ft. /hr Furnace Overheating HazardSeconds Size of Test Dial For Revolution Color Speed AS Shipped Speed SelectionDesired Heating Mode Setup Switch Blower OFF Delay SEC Check Safety ControlsChecklist Stage Furnace Blower OFF delay Setup SwitchA10184 A10184A A10185 A10185A Introduction Service and Maintenance ProceduresCarbon Monoxide Poisoning and Fire Hazard Care and MaintenanceWiring Diagram Cleaning AND/OR Replacing AIR Filter Filter Size Information In. / MmBlower Motor and Wheel Electrical Shock Hazard Igniter Position-Side View Cleaning Heat ExchangerIgniter Position-Top View Sequence of Operation312AAV 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 Description Part Number Accessory ListParts 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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