Bryant 394HAD, 396HAD instruction manual Ð8Ð

Page 8

Replace

board.

Turn on 115-VAC

power to unit.

Is blower running?

NO

Jumper across screws R & G.

Is

blower running

on cooling

speed?

YES

Is

NO115VAC across EAC-1

& COM?

 

 

 

 

START

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Disconnect all thermostat

 

 

 

 

wires from board.

 

YES

Is 24VAC

YES

 

 

 

 

across screws

 

 

 

 

 

 

 

 

R & C?

NO

Check/Replace:

1.Limit switch

2.Limit shield (if used)

3.Fuse link

4.Auxillary limit switch (if used)

5.Wire harness

Is

NO115VACNO across HI &

COM?

YES

Replace

blower motor

and/or start

capacitor.

Is 24VAC

YES

 

across screws

 

 

 

W & C or

 

 

G & C?

 

 

 

NO

 

 

 

 

 

 

 

 

 

Is

115VACYES across L1 &

L2?

NO

Check/Replace:

1.Unit power

2.Door switch

3.Power harness

Turn off 115-VAC

power to unit.

NO

Are

all thermostat wires to board disconnected?

YES

Replace

board.

YES

Is

24VAC

across screws

R & C?

NO

Check/Replace:

1.3-amp board fuse

2.Transformer

YES

Remove

R & G jumper.

Check pressure tube for leak or crimp; otherwise, replace pressure switch

YES

Is

24VAC

across PL1-2 & screw C on board?

NO

NO

Replace

 

 

 

 

 

 

board.

 

 

 

 

NODoes blower turn

off?

YES

Is heat

exchangerYES pressure drop greater

than 0.35-in.

wc?

NO

YES

Is 24VAC

across pressure

switch N/O contact

&screw C on board?

NO

Repair wire

harness.

Jumper across screws R & W.

Is

inducer motor

on?

NO

Check/Replace:

1.Vent systems

2.Induce wheel

3.Flue choke

4.Inducer voltage

5.Inducer motor bearings

YES

Is

NO

 

unit lit?

 

YES

Is 24VAC

across pressure

switch N/O contact

&screw C on board?

NO

Is

24VAC across gas

valve?

YES

Check/Replace:

 

 

 

1.

Draft safeguard switch

 

 

 

 

 

 

2.

Wire harness

 

 

 

 

 

 

 

 

YES

Check/Replace:

1.

Pilot

 

 

 

 

 

 

2.

Thermocouple

 

 

 

3.

Gas valve

 

 

 

 

 

Replace

YES

Is

115VAC across

Is

blower running NO on heat speed 45

Is

115VAC across

YES

Replace

blower motor

 

inducer motor.

NO

Check/Repair wire harness; otherwise, replace pressure switch.

inducer motor

connector?

NO

Is

24VAC across PL-2 & screw C on board?

YES

Replace

board.

NO

sec after unit

lights?

YES

Is

115VAC

across EAC-1

& COM?

YES

Remove

R & M jumper.

inducer motor

connector?

NO

Is

24VAC across

PL-1 & screw C on board?

NO

Repair wire

harness.

 

 

 

 

and/or start

 

 

 

 

capacitor.

YES

 

 

 

 

 

Replace

 

 

 

 

 

 

 

 

 

 

board.

 

 

 

 

 

 

 

 

 

 

Check/Replace

 

 

 

 

 

 

thermostat

 

 

 

 

 

and/or

 

 

 

 

thermostat wiring.

 

 

 

 

 

 

 

 

NO

After

off-delay YES does blower

turn off?

 

 

 

NO

 

 

 

 

Reconnect all

 

Does unit

thermostat wires.

 

operate?

NOTE: After replacing any component, verify correct operating sequence as indicated by bold arrows.

YES

END OF TEST.

A91253

© 1993 BDP Co. · P.O. Box 70 · Indianapolis, IN 46206

Printed in U.S.A.

Ð8Ð

35001b

Catalog No. BDP-3339-432

Image 8
Contents Ð1Ð Safety ConsiderationsCare and Maintenance Air Filter Arrangement Ðfilter Size Information for Down Flow FurnaceÐfilter Size Information for Upflow Furnace Ð2ÐBlower Motor and Wheel Ð3ÐCleaning Heat Exchanger Ð4ÐÐ5Ð Electrical Controls and WiringTroubleshooting ÐHeating and Cooling Application Wiring Diagram Ð6ÐÐUnit Wiring Diagram Ð7ÐÐ8Ð

394HAD, 396HAD specifications

The Bryant 394HAD and 396HAD are high-efficiency air conditioning systems designed to provide optimal comfort and energy savings for residential applications. Both units are engineered with advanced technologies that make them stand out in the competitive HVAC market.

One of the main features of both the 394HAD and 396HAD is their impressive Seasonal Energy Efficiency Ratio (SEER) ratings. These models boast SEER ratings exceeding 16, which means they convert a greater portion of energy into cooling, resulting in lower energy bills and reduced environmental impact. The higher the SEER rating, the more energy-efficient the unit, making these models a smart choice for homeowners looking to minimize their carbon footprint.

Another significant characteristic is the variable-speed compressor technology employed in both models. This innovative feature allows the units to adjust their cooling output based on the specific needs of the home, leading to improved comfort levels and energy savings. The variable-speed operation provides a quieter performance, as the system operates at lower speeds during off-peak times, reducing noise pollution and enhancing indoor comfort.

The Bryant 394HAD and 396HAD models are also equipped with advanced refrigeration technologies, including a state-of-the-art coil design. These systems utilize enhanced aluminum or copper coils that improve heat exchange efficiency, maximizing the cooling performance. Furthermore, both models include a durable, weather-resistant cabinet that protects the internal components from harsh outdoor conditions, ensuring longevity and reliable operation.

In terms of convenience and ease of use, both units are compatible with Bryant’s smart thermostats and home automation systems. This integration enables homeowners to control their HVAC systems remotely, adjust settings, and monitor energy consumption, providing added comfort and peace of mind.

Lastly, the Bryant 394HAD and 396HAD are backed by a robust warranty program, reflecting the manufacturer’s commitment to quality and customer satisfaction. With a combination of cutting-edge technology, high efficiency, and user-friendly features, these air conditioning models are excellent options for achieving a comfortable home environment while also being mindful of energy usage.