American Water Heater BBCN375T754NV warranty Troubleshooting Guidelines, Trouble Shooting

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TROUBLESHOOTING GUIDELINES

WATER HEATER CONTROL

TROUBLE SHOOTING

Please check guidelines below. For your safety, water heater service should be performed only by a qualified service technician.

Read the GENERAL SAFETY INFORMATION section first.

INTELLI-VENT TROUBLESHOOTING CHART - USER CONTROL

#

LED STATUS

PROBLEM

SOLUTION

1

B

C D

E

F

Inadequate or no earth ground

1. Ensure the wall outlet is properly grounded.

 

 

 

 

sensed by the Intelli-Vent™

2. Ensure all ground connections/wires on the

 

 

 

 

 

control.

 

 

 

 

 

 

water heater are secure.

2

B

C D

E

F

Power supply to Intelli-Vent™

1. Ensure the wall outlet is properly wired.

 

 

 

 

control has reversed polarity or a

2. Ensure all internal 120 VAC wiring connections and

 

 

 

 

 

high resistance to earth ground.

 

 

 

 

 

 

wiring harness have no reversed wires. 120 VAC

 

 

 

 

 

 

“hot” wire must connect to the on/off switch.

 

 

 

 

 

 

3. Ensure the wall outlet is properly grounded.

 

 

 

 

 

 

4. Ensure all ground connections/wires on the water

 

 

 

 

 

 

heater are secure.

3

B

C D

E

F

Pressure switch circuit remaining

1. Ensure air pressure switch circuit wiring is correct

closed for more than 5 seconds

and the air pressure switch is not jumpered.

 

 

 

 

 

after heating cycle begins.

2. Secure power to water heater, check continuity of air

 

 

 

 

 

Blower does not start.

 

 

 

 

 

Service Note:

pressure switch contacts with wires disconnected.

 

 

 

 

 

A If pressure switch contacts show continuity (closed

 

 

 

 

 

Disconnect power - disconnect one

 

 

 

 

 

wire from the air pressure switch

circuit) replace the pressure switch.

 

 

 

 

 

or the vent temperature limit

B If pressure switch contacts are open and all wiring

 

 

 

 

 

switch. Turn power back on -

 

 

 

 

 

blower should start.

is correct - turn the power off for 10-20 seconds

 

 

 

 

 

 

then on again to clear the error code - if the error

 

 

 

 

 

 

code persists replace the Intelli-Vent™ control.

 

 

 

 

 

 

 

4

B

C D

E

F

Pressure switch circuit remains open

1. Ensure the blower is running - check for 120 VAC to

longer than 5 seconds after the blower

the blower when the heating cycle begins, check the

 

 

 

 

 

is energized.

wiring. If the control does not energize the blower -

 

 

 

 

 

Blower may run continuously in

replace the Intelli-Vent™ control. If the blower fails to

 

 

 

 

 

start when energized - replace the blower assembly.

 

 

 

 

 

this condition.

2. Ensure the air pressure switch sensing tube is properly

 

 

 

 

 

 

 

 

 

 

 

 

connected - not kinked or damaged.

 

 

 

 

 

 

3. Check continuity of vent temperature limit switch - replace

 

 

 

 

 

 

switch if contacts remain open under 160ºF (71°C).

 

 

 

 

 

Service Note:

4. Ensure the correct size of vent pipe (2”, 3”, 4”) was used

 

 

 

 

 

per installation manual for vent length. Ensure maximum

 

 

 

 

 

To learn more about performing Air

number of elbows or equivalent feet of vent pipe has not

 

 

 

 

 

Pressure Switch tests visit our web

exceeded maximum limits.

 

 

 

 

 

site www.hotwater.com to download

5. Ensure there are no obstructions in the vent pipe.

 

 

 

 

 

technical bulletin A-023-06 Air Pressure

 

 

 

 

 

Switches.

6. Check air pressure switch performance - check pressure

 

 

 

 

 

 

 

 

 

 

 

 

with a digital manometer - check continuity of contacts.

 

 

 

 

 

 

(see service note in left column) If the switch proves

 

 

 

 

 

 

defective - replace the air pressure switch and or the

 

 

 

 

 

 

blower assembly as required.

 

 

 

 

 

 

7. If air pressure switch performance test results prove

 

 

 

 

 

 

the air pressure switch is working properly and error

 

 

 

 

 

 

code 4 persists - replace the Intelli-Vent™ control.

 

 

 

 

 

 

 

 

B

C D

E

F

The Intelli-Vent™ control has detected

1. Check wiring to the hot surface ignitor - replace ignitor

5

an open ignitor circuit.

assembly if wiring is damaged or worn.

 

 

 

 

 

Service Note:

2. Check ignitor assembly plug and the socket on the

 

 

 

 

 

The resistance (ohms) of a hot surface

Intelli-Vent™ body for good connection. Replace

 

 

 

 

 

ignitor will increase over time. If the

ignitor assembly and/or control if necessary.

 

 

 

 

 

resistance at room temperature is near

3. Check resistance of ignitor at room temperature 77ºF

 

 

 

 

 

18.8 ohms - consider replacing the ignitor

 

 

 

 

 

as a preventative measure.

(25°C) at the plug end. Replace ignitor if resistance

 

 

 

 

 

 

is not within 11.5 and 18.8 ohms at room temperature.

 

 

 

 

 

 

4. If results from the above tests were good and error

 

 

 

 

 

 

code 5 persists - replace the Intelli-Vent™ control.

 

 

 

 

 

 

 

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Contents Place These Instructions Adjacent to Heater Notify Owner to Keep for Future ReferenceGAS and Electrical Characteristics DimensionsRecovery Ratings Input Rate TOP ViewTable of Contents Installation Instructions AIR Requirements ClearancesHard Water Unconfined SpaceVenting Vent ConnectionGAS Piping Combination Water Potable Heating Space HeatingRelief Valve System ConnectionsHeater Wiring Wiring Diagram and SchematicTo Operate the Heater PurgingGAS Pressure Regulator GAS Meter Size Natural Gases onlyFor Your Safety Read Before Operating What to do if YOU Smell GASTemperature Regulation Checking VentingMain Burner and Igniter Service InformationHigh Temperature Limit Switch ECO Checking GAS InputPreventive Maintenance Tank Cleanout Procedure FLO-JUG Method of DelimingChecklist CondensationAnode GAS and Electric Power are ON,OFF/ON Switch is on TroubleshootingService and Repair Water Heating CycleWater Leaks Not Enough or no HOT WaterCondensation Leaking T&P ValveTroubleshooting Guidelines Trouble ShootingBlack resistor wire between pins 3 & 4 with an ohm meter D E FUnplug the ignitor assembly plug from the control. Check Page Page ALL Other Parts Service and Repair ExpensesClaim Procedure Conditions and Exceptions

BBCN375T754NV, Commercial Ultra Low NOx Gas water Heater specifications

The American Water Heater BBCN375T754NV is a standout in the realm of commercial water heating solutions, specifically designed to meet the demands of businesses requiring high efficiency and reliability. This ultra-low NOx gas water heater is engineered to reduce nitrogen oxide emissions, adhering to strict environmental regulations, which makes it an ideal choice for those conscious of their ecological footprint.

One of the main features of the BBCN375T754NV is its impressive capacity of 75 gallons, making it suitable for various commercial applications, including restaurants, hotels, and manufacturing facilities. This model is built to provide a consistent and rapid supply of hot water, ensuring that users have access to the hot water they need without interruption.

The heater is equipped with a powerful gas burner system, providing an input of 375,000 BTUs per hour, which guarantees robust performance even during peak demand times. This high input rate allows for quick recovery and reduces waiting times for hot water delivery, an essential factor in maintaining operational efficiency.

In terms of technology, the BBCN375T754NV incorporates advanced combustion management systems that optimize gas consumption and efficiency. This ensures that the heater operates at maximum capacity while minimizing energy waste. Additionally, the unit features a robust insulation system designed to reduce heat loss, further contributing to its energy-efficient performance.

Another important characteristic of this water heater is its durable construction. Made from high-quality materials, including a glass-lined tank for corrosion resistance, the BBCN375T754NV is built to withstand the rigors of a commercial environment. The unit comes with a built-in anode rod to enhance longevity and minimize maintenance needs.

Furthermore, the heater includes an easy-to-navigate digital display that simplifies temperature adjustments and monitoring. This feature enables operators to easily manage the system settings, ensuring optimal performance and safety.

To sum up, the American Water Heater BBCN375T754NV is designed for those who need an efficient, reliable, and environmentally friendly solution to their commercial hot water requirements. With its high capacity, advanced technologies, and durable design, it stands as a robust option for businesses looking to enhance their water heating systems while adhering to environmental standards.
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