American Water Heater Commercial Ultra Low NOx Gas water Heater, BBCN375T754NV warranty D E F

Page 19

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

6

B C D E F

Ignition/flame failure.

1. Gas supply is turned off-pressure too low. Ensure supply and

 

The water heater has reached the

manifold gas pressures are within requirements in installation

 

 

manual. Manifold gas pressure is non-adjustable if pressure is

 

 

maximum number of retries and is

off by more than 0.3” W.C. (75 Pa) replace Intelli-Vent™ control.

 

 

currently locked out for one hour.

2. Low supply voltage - should be 115 -125 VAC.

 

 

 

 

 

Cycle the power to the water heater

3. Ensure flame sensor is making good contact with burner

 

 

off and on to reset.

flame, ensure flame is steady see #8 below.

 

 

Service Note:

4. Ensure the flame sensor is clean - use ultra fine steel

 

 

The resistance (ohms) of a hot surface

wool or Scotch-Brite™ pad to clean flame sensor.

 

 

ignitor will increase over time. If the

5. Ensure the hot surface ignitor is positioned to provide

 

 

resistance at room temperature is near

 

 

consistent ignition.

 

 

18.8 ohms - consider replacing the ignitor

 

 

6. Check for any cracks in ignitor assembly ceramic

 

 

as a preventative measure.

 

 

 

insulators - replace ignitor assembly if damaged.

 

 

 

7. Check resistance of ignitor at room temperature (77ºF)

 

 

 

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

 

 

 

not within 11.5 and 18.8 ohms at room temperature.

 

 

 

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

 

 

 

installation manual for vent length. Using larger pipe than required

 

 

 

may cause excessive air turbulance in combustion chamber.

 

 

 

 

7

B C D E F

Self diagnostic tests have found a problem

1. Turn the power off for 10-20 seconds then on again to

 

with the gas valve driver circuit, internal

clear these error codes.

 

 

microprocessor, or other internal circuits.

2. If any of these error codes persist or cannot be cleared-

8

B C D E F

 

replace the Intelli-Vent™ control.

 

 

 

9

B C D E F

 

 

 

 

 

 

 

 

 

10

B C D E F

Flame signal has been sensed out of

1. Turn the power off for 10-20 seconds and then on again

 

proper sequence.

to clear this error code.

 

 

 

2. Replace the Intelli-Vent™ control if this error code persists.

 

 

 

 

 

B C D E F

Water temperature in the tank has

1. Turn the power off for 10-20 seconds then on again

11

exceeded 195°F (91°C) and has

to clear this error code.

 

 

 

activated the ECO.

2. Replace the Intelli-Vent™ if the error code persists.

 

 

 

 

 

 

 

 

 

The self diagnostic check detected one

1. Press and release temperature adjust buttons. If above

12

B C D E F

or both of the temperature adjust buttons

action does not clear error, control will continue to regulate

 

 

are stuck.

water temperature at last setting. However, settings will no

 

 

 

longer be adjustable - the control should be replaced.

 

 

 

 

 

B C D E F

The self diagnostic test has detected the

1. Turn power off for 10-20 seconds then on again to

13

 

water temperature sensor (thermistor) is

clear this error code.

 

 

either open or shorted.

2. Replace the Intelli-Vent™ control if this error code persist.

 

 

 

14

B C D E F

Self-diagnostic test found a problem with black

1. Turn off power to the water heater.

 

resistor wire on the ignitor assembly plug; resistor

2. Insure black resistor wire is not cut, missing, and is installed

 

 

wire is open or shorted.

between pins 3 & 4 of ignitor assembly plug. Replace ignitor

 

 

Service Note: To perform this test ohm meter

assembly if damaged or defective.

 

 

3. Unplug ignitor assembly plug from control. Check resistance

 

 

used must be capable of reading up to 2,000,000

of black resistor wire between pins 3 & 4 with an ohm meter.

 

 

ohms. Unless ohm meter used has an auto-range

3.1 If reading taken is less than 2000 (5000 for date code 0617

 

 

feature resistance should be checked twice. First

through 0709) or more than 1.7 million ohms, replace ignitor

 

 

reading will be taken using an ohms scale above

assembly. 3.2 If reading taken is between 2000 (5000 for date

 

 

1,700,000 ohms. Second reading is taken using

code 0617 through 0709) and 1.7 million ohms, replace

 

 

ohms scale just above 2,000 or 5,000 ohms.

Intelli- Vent™ control.

 

 

 

Service Note: Raised ridges on ignitor assembly plug identify

 

 

 

#1, #2, and #3 pins. The four-digit date code can be found on

 

 

 

side of the controller.

 

 

 

 

19

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Contents Notify Owner to Keep for Future Reference Place These Instructions Adjacent to HeaterTOP View DimensionsRecovery Ratings Input Rate GAS and Electrical CharacteristicsTable of Contents Installation Instructions Unconfined Space ClearancesHard Water AIR RequirementsVent Connection VentingSystem Connections Combination Water Potable Heating Space HeatingRelief Valve GAS PipingWiring Diagram and Schematic Heater WiringGAS Meter Size Natural Gases only PurgingGAS Pressure Regulator To Operate the HeaterWhat to do if YOU Smell GAS For Your Safety Read Before OperatingChecking Venting Temperature RegulationChecking GAS Input Service InformationHigh Temperature Limit Switch ECO Main Burner and IgniterPreventive Maintenance FLO-JUG Method of Deliming Tank Cleanout ProcedureCondensation ChecklistAnode Water Heating Cycle TroubleshootingService and Repair GAS and Electric Power are ON,OFF/ON Switch is onLeaking T&P Valve Not Enough or no HOT WaterCondensation Water LeaksTrouble Shooting Troubleshooting GuidelinesD E F Black resistor wire between pins 3 & 4 with an ohm meterUnplug the ignitor assembly plug from the control. Check Page Page Conditions and Exceptions Service and Repair ExpensesClaim Procedure ALL Other Parts

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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