American Water Heater Commercial Gas Water Heaters Sequence of Operation Flow Chart, YES no

Models: AHCG/HCG3 60T 120 - AHCG3/HCG3 100T 250 Commercial Gas Water Heaters

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SEQUENCE OF OPERATION FLOW CHART

If tank temperature drops below Operating Set Point minus

Differential setting a heating cycle is activated

 

Control System performs diagnostic checks

 

 

 

 

 

 

Control System Locks Out

Normal State of all pressure switches and ECO are checked

 

 

 

 

 

 

NO

 

 

 

Blower Prover pressure switch verified open

 

 

 

 

 

Displays Fault Msg

 

 

 

 

 

 

 

All other pressure switches and ECO are verified closed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Combustion Blower is energized

 

 

 

 

 

 

 

 

 

 

 

Pre-Purge cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control System Locks Out

 

 

Blower Prover switch contacts confirmed

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

“Blower Prover Open”

 

 

closed by control system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fault Msg is displayed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Igniter is energized for warm up period

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Does Control System sense minimum

Igniter amps?

 

 

 

Control System Locks Out

 

NO

 

“Low Igniter Current”

 

 

 

 

 

Fault Msg is displayed

24 Volt Gas Valve is energized gas flows to Main Burner

Is flame sensed at the Main Burner?

(control system monitors the flame sensor)

YESNO

2.0 minimum AC amps

Water is heated to

set point

24 Volt Gas Valve de-energized

30second

Post-Purge cycle

Water heater goes into standby mode

24 Volt Gas Valve de-energized

30second

Inter-Purge cycle

Retries up to two more times

Control System

Locks Out

“Ignition Failure”

Fault Msg is

displayed

Figure 62

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Page 59
Image 59
American Water Heater Commercial Gas Water Heaters instruction manual Sequence of Operation Flow Chart, YES no

AHCG/HCG3 60T 120 - AHCG3/HCG3 100T 250, Commercial Gas Water Heaters specifications

American Water Heater's Commercial Gas Water Heaters, particularly the AHCG/HCG3 60T 120 and AHCG3/HCG3 100T 250 models, stand out in the market for their impressive performance and reliable efficiency. Designed to meet the demanding needs of commercial applications, these gas water heaters provide an optimal solution for businesses requiring consistent hot water supply.

One of the main features of the AHCG/HCG3 series is its exceptional heat capacity. The models are engineered to deliver high recovery rates, ensuring that adequate hot water is available even during peak demand periods. The AHCG/HCG3 60T 120 can yield a robust output, ideal for smaller to medium-sized facilities, while the AHCG3/HCG3 100T 250 is designed for larger operations that require enhanced capacity.

These water heaters incorporate innovative technologies to maximize efficiency. The use of a high-efficiency burner system significantly reduces gas consumption, earning these models an Energy Factor rating that complies with modern energy standards. Additionally, the inclusion of a direct vent design allows for safe and efficient exhaust management, further promoting the energy-saving capabilities of these units.

The design of these commercial water heaters prioritizes durability and longevity. Constructed with heavy-duty components, including a corrosion-resistant water tank, these models are built to last, reducing the need for frequent replacements and maintenance. They also feature an advanced control system that monitors and adjusts the operation for optimal performance, enhancing user experience while decreasing operational costs.

Another notable characteristic of the AHCG/HCG3 series is their flexibility in installation. Both the 60T 120 and the 100T 250 models offer various venting options, which means they can easily fit into the existing infrastructure of many commercial facilities. This versatility facilitates a seamless integration process, saving time and resources during installation.

With a commitment to providing effective hot water solutions, American Water Heater continues to innovate, making the AHCG/HCG3 series a valuable addition to any commercial establishment. From restaurants to laundromats and beyond, these gas water heaters deliver reliable performance, ensuring that businesses can operate smoothly and efficiently.