See Fig. 40 for example of possible field drain attachment using 1/2-in. CPVC or PVC tee for vent and A/C or humidifier drain connection.

OPEN STAND

PIPE FOR

A/C OR

HUMIDIFIER

DRAIN

TEE

CONDENSATE TRAP

WIRE TIE(S)

HEAT TAPE (3 WRAPS MINIMUM)

Fig. 41ÐCondensate Trap Heat Tape

SEQUENCE OF OPERATION

A93036

TO OPEN

DRAIN

A94054

Fig. 40ÐExample of Field Drain Attachment

Outdoor draining of the furnace is permissible if allowed by local codes. Caution should be taken when freezing ambient may freeze drain pipe and prohibit draining.

WARNING: Caution should be taken to prevent drain- ing where slippery conditions may cause personal inju- ries. Excessive condensate draining may cause saturated soil conditions which may result in damage to plants.

III.CONDENSATE DRAIN PROTECTION

Freezing condensate left in condensate trap and drain line may cause cracks, and possible water damage may occur. If freeze protection is required, use condensate freeze protection accessory or equivalent 3 to 6 watt per ft at 120v and 40°F self-regulating, shielded, and waterproof heat tape. See Installation Instructions supplied with accessory or heat tape manufacturer's recommenda- tions.

1.Fold heat tape in half and wrap on itself 3 times.

2.Locate heat tape between sides of condensate trap back. (See Fig. 41.)

3.Use wire ties to secure heat tape in place. Wire ties can be positioned in notches of condensate trap sides. (See Fig. 41.)

4.Wrap field drain pipe with remaining heat tape, approxi- mately 1 wrap per ft.

5.When using field-supplied heat tape, follow heat tape manufacturer's instructions for all other installation guide- lines.

CAUTION: Furnace control must be grounded for proper operation, or control will lock out. Control is grounded through green wire routed to gas valve and burner box screw.

Using schematic diagram, follow sequence of operation through different modes. (See Fig. 24.) Read and follow wiring diagram carefully.

NOTE: If 115-v power supply to furnace or blower access panel switch is interrupted during a call for heat, blower operates for 90 sec when power is restored before heating cycle is resumed.

I.HEATING MODE

When wall thermostat calls for heat, R-W circuit closes. Furnace control performs a self-check, verifies pressure switch contacts are open, and starts inducer motor.

1.Prepurge periodÐAs inducer motor comes up to speed, pressure switch contacts close to begin a 15-sec prepurge period.

2.Ignitor warm upÐAt end of prepurge period, ignitor is energized for a 17-sec ignitor warm-up period.

3.Ignition sequenceÐWhen ignitor warm-up period is com- pleted, gas valve opens, permitting gas flow to burners where it is ignited. After 5 sec, ignitor is de-energized and a 2-sec flame-sensing period begins.

HUM terminal on control center is energized with gas valve. See Accessories Ð Humidifier section.

4.Flame sensingÐWhen burner flame is sensed, control begins blower on delay period and continues holding gas valve open.

If burner flame is not sensed, control center de-energizes gas valve and ignition sequence is repeated.

NOTE: Ignition sequence repeats 3 additional times before a lockout occurs. Lockout automatically resets after 3 hr or can be manually reset by turning off 115v (not at thermostat) for 3 sec minimum, then turning it on again.

5. Blower on delayÐSixty sec after burner flame is proven (40 sec if jumper has been cut for 140 size unit in downflow orientation), blower motor is energized on heating speed. Simultaneously, electronic air cleaner terminal EAC-1 is energized.

Ð31Ð

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Bryant 340MAV instruction manual Sequence of Operation, III. Condensate Drain Protection, Heating Mode

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.