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.

—45—

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Image 45
Bryant 340MAV instruction manual Check Primary Limit Control, II. Check Pressure Switch, Checklist
Page 44 Page 46

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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