Bryant 340MAV instruction manual Check Primary Limit Control, II. Check Pressure Switch, Checklist

Page 45

THERMOSTAT SUBBASE

TERMINALS WITH

THERMOSTAT REMOVED

HOOK-AROUND

VOLT/AMMETER

R Y W G

10 TURNS

FROM UNIT 24-VOLT

TERMINAL BLOCK

EXAMPLE:

5.0 AMPS ON AMMETER

= 0.5 AMPS FOR THERMOSTAT SETTING

 

10 TURNS AROUND JAWS

A80201

Fig. 53—Amp Draw Check with Ammeter

I. CHECK PRIMARY LIMIT CONTROL

This control shuts off gas control system and energizes air- circulating blower motor if furnace overheats. Recommended method of checking this limit control is to gradually block off return air after furnace has been operating for a period of at least 5 minutes. As soon as limit control has shut off burners, return-air opening should be unblocked to permit normal air circulation. By using this method to check limit control, it can be established that limit is functioning properly and operates if there is a restricted return-air duct or motor failure. If limit control does not function during this test, cause must be determined and corrected.

II. CHECK PRESSURE SWITCH

This control proves operation of draft inducer. Check switch operation as follows:

1.Turn off 115-v power to furnace.

2.Remove main furnace door and disconnect inducer motor lead wires from wire harness.

3.Turn on 115-v power to furnace.

4.Set thermostat to call for heat and wait 1 minute. When pressure switch is functioning properly, hot surface igniter should NOT glow, and control status code LED flashes a Status Code 31. If hot surface igniter glows when inducer motor is disconnected, shut furnace down immediately. Determine reason pressure switch did not function properly and correct condition.

5.Turn off 115-v power to furnace.

6.Reconnect inducer motor leads, reinstall main furnace door, and turn on 115-v power supply.

CHECKLIST

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

2.Verify flame rollout manual reset switch has continuity.

3.Verify that blower and main access doors are properly installed.

4.Cycle test furnace with room thermostat.

5.Check operation of accessories per manufacturer’s instruc- tions.

6.Review User’s Guide with owner.

7.Leave literature packet near furnace.

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Contents Safety Considerations Electrostatic Discharge ESD PrecautionsMultipoise Orientations Unit Size DimensionsII. General Installation SafetyVI. GAS Piping and GAS Pipe Pressure Testing Codes and StandardsVII. Electrical Connections Electrostatic Discharge ESD PrecautionsApplications IntroductionGeneral II. Upflow ApplicationsCondensate Trap Tubing Factory-Shipped Orientation Pressure Switch TubingCondensate Trap Location Alternate Upflow Orientation Condensate Trap Tubing Alternate Upflow OrientationIII. Downflow Applications Condensate Trap LocationCondensate Trap Tubing Horizontal Left Tube Configuration IV. Horizontal Left SUPPLY-AIR Discharge Applications Construct a Working PlatformHorizontal Right SUPPLY-AIR Discharge Applications Attic Location and Working Platform Location II. Furnace Location Relative to Cooling Equipment Furnace Location for Proper Condensate DrainageInstallation Leveling Legs if Desired II. Installation in Upflow or Downflow ApplicationsIII. Installation in Horizontal Applications III. Hazardous LocationsOpening Dimensions Furnace Plenum Opening Floor Opening CasingWidth II. Ductwork Acoustical Treatment Duct FlangesIV. Return AIR Connections III. Supply AIR ConnectionsFilter Arrangement Filter InformationVII. GAS Piping VI. Bottom Closure PanelMaximum Capacity of Pipe Casings onlyElectrical Connections Fire or Explosion HazardIII Accessories WiringPCB Direct Venting Electrical DataRemoval of Existing Furnaces from Common Vent Systems II. COMBUSTION-AIR and Vent PipingControl Center Clearance FT COMBUSTION-AIR and Vent Pipe Termination ClearancesCombustion-Air and Vent Pipe Diameter ExampleCombustion-Air and Vent Pipe Attachment Short Vent 5 to 8 Ft System COMBUSTION-AIR Intake Housing Plug FittingAltitude FT Maximum Allowable Pipe Length FT6001 to 7000‡ Air Intake Housing Plug Fitting Drain Vent Extension Pipe Extended Exposed Sidewall PipesTwo-Pipe Termination Kit IV. Multiventing and Vent Terminations Concentric Vent/Air Termination KitRoof Termination Preferred Sidewall Termination of 12 in. or Less Condensate Drain General II. ApplicationIII. Condensate Drain Protection II. Cooling Mode Heating ModeIII. Continuous Blower Mode IV. Heat Pump ModeIV. Adjustments START-UP Procedures GeneralComponent Test II. Prime Condensate Trap with WaterInducer Housing Drain Cap BTU/CU FT Orifice Manifold 625 650 Only 7001 675 725 8000 775 750 15% 825 2001to 725 750 Only 4001 775 800 825 5000 875 850 900 925 Altitude Derate Multiplier Example 100,000 Btuh Input Furnace Installed AT 4300 FTUnited States CanadaCheck Safety Controls Blower OFF Delay Setup PositionGAS Rate CU FT/HR Speed SelectorII. Check Pressure Switch ChecklistCheck Primary Limit Control CHECKLIST-START-UP CHECKLIST-INSTALLATIONLoad Calculation Combustion AIR Vent Piping
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340MAV specifications

The Bryant 340MAV is a standout model in the Bryant lineup, designed to provide exceptional comfort, efficiency, and performance for residential heating and cooling needs. This unit offers a perfect blend of innovative technology and user-friendly features, making it an ideal choice for homeowners seeking reliability and quality.

One of the defining characteristics of the Bryant 340MAV is its impressive efficiency rating. With a SEER (Seasonal Energy Efficiency Ratio) of up to 18, this model ensures that homeowners can enjoy effective cooling during the summer months while minimizing energy consumption. Similarly, the heating efficiency is notable, with a high AFUE (Annual Fuel Utilization Efficiency) rating. This makes the 340MAV an environmentally friendly option that also promotes cost savings on energy bills.

The 340MAV incorporates advanced technologies that enhance its performance. One such technology is the variable-speed compressor, which allows the system to adjust its output based on the demands of the home. This means that the unit operates more quietly and reduces energy usage by matching the cooling or heating output required. Additionally, the two-stage heating capability provides more consistent temperatures and improved comfort throughout the space.

Operating noise is a crucial factor in residential HVAC systems, and the Bryant 340MAV is designed with this in mind. Engineered for quiet operation, the unit features a sound-dampening design, including an insulated cabinet and a specially designed compressor that minimizes noise levels. Homeowners can enjoy a comfortable indoor climate without the disruptive racket often associated with traditional systems.

Furthermore, the Bryant 340MAV is equipped with a durable all-aluminum coil, which improves heat transfer efficiency while also being resistant to corrosion. This characteristic contributes to the longevity of the unit, ensuring that it can withstand various environmental factors without compromising performance.

Another key feature is the advanced control options that the Bryant 340MAV offers. Integration with smart thermostats allows homeowners to monitor and adjust their HVAC system remotely, ensuring optimal comfort at all times. Additionally, the system is compatible with Bryant's Perfect Air™ filtration system, enhancing indoor air quality by reducing pollutants and allergens.

In summary, the Bryant 340MAV is a high-efficiency heating and cooling solution that brings together cutting-edge technology, quiet operation, and user-friendly features. With its focus on comfort and energy savings, it stands out as a prime choice for homeowners looking to invest in a reliable HVAC system.
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