American Water Heater GAS-FIRED COMMERCIAL WATER HEATER guide

Index

1.The electronic thermostat controls the 24-volt circuit to the ignition control. When the thermostat contacts close, a 24-volt circuit is completed from the transformer through the thermostat relay to the ignition control module to initiate the ignition sequence.

2.On flue damper models, the damper reaches then full open position, the end switches in the damper close, completing the 24-volt circuit to the ignition module.

3.The ignition control sends 24-volt power to the pilot valve “PV” terminals on the gas valve allowing pilot gas to flow to the pilot. The ignition control also simultaneously sends high voltage low current electricity through the electrode wire to the pilot electrode causing sparks at the pilot electrode to ignite the pilot gas. If the pilot fails to ignite within 90 seconds, the ignition control stops the pilot gas and sparking for 15 seconds to allow gas to dissipate. The ignition control will then attempt 2 (two) more ignition trials as stated above. If the pilot does not ignite after 3 trials, the ignition control will then go into “lockout mode”, and the ignition system will remain shut down until the control is reset by interrupting power to the ignition module.

4.When the pilot gas ignites, the flame is sensed by the electrode or a flame sensing rod. The flame sensing signal received by the ignition control causes the sparking to stop and the main gas valve to open. The main burners ignite from the pilot flame. The pilot flame is continually monitored by the flame sensing circuit. If for any reason, the pilot flame is not sensed by the electrode or flame sensing rod, the main gas valve closes, the spark electrode is reenergized, and the ignition trial period is reestablished. The same sequence occurs during a power or gas supply interruption.

5.The main burners continue to operate until the water temperature in the tank increases enough to cause the thermostat contacts to open. When the thermostat contacts open the 24-volt power is interrupted to the ignition control module and the gas valve closes. The flue damper (on “D” models) closes.

6.If for some reason thermostat contacts fail to open, then the high temperature limit (ECO) contacts in the thermostat sensor open and interrupts power to the pilot valve causing the pilot to extinguish. The ignition module senses the pilot outage and attempts to relight the pilot by reestablishing the sparking at the electrode as stated in paragraph 3 above. Since the pilot valve circuit is open, the pilot will not ignite and the system will go into “lockout mode” after 3 ignition trials. In the “lockout mode”, the ignition system will remain shutdown until the control is reset by interrupting power to the ignition module. The ECO will not reset to close the contacts until the tank water temperature drops to between 100°F (38°C) and 160°F (71°C). If the ECO contacts open, the cause for the high water temperature should be determined before resetting the ignition system.

Troubleshooting Procedure for Electronic Thermostat

If water temperature is too hot, proceed as follows:

GAS-FIRED COMMERCIAL WATER HEATER specifications

American Water Heater offers a range of high-performance gas-fired commercial water heaters designed to meet the needs of a variety of applications, including restaurants, hotels, and industrial facilities. Renowned for their reliability and efficiency, these water heaters are engineered to provide large volumes of hot water consistently and efficiently.

One of the standout features of American Water Heater's gas-fired models is their robust construction. Built with durable materials, these heaters are designed to withstand the rigors of daily use in demanding commercial environments. The units typically have a high-quality glass-lined tank that enhances protection against corrosion, prolonging the water heater's lifespan and ensuring longevity.

Efficiency is at the core of American Water Heater's design ethos. Many models are equipped with advanced burner technologies that promote higher thermal efficiency. Some units boast energy factors exceeding industry standards, minimizing fuel consumption while maximizing output. This not only reduces operational costs but also contributes to environmental sustainability by lowering carbon emissions.

Among the innovative technologies incorporated into these water heaters is a precise temperature control system, which allows for the accurate regulation of hot water supply. This feature is crucial in commercial settings where the demand for hot water can fluctuate significantly. Moreover, features like digital diagnostics and integrated control systems make it easier for operators to monitor performance and troubleshoot problems swiftly, thus reducing downtime.

Safety is paramount in any gas-fired appliance, and American Water Heater prioritizes this with features such as automatic shutoff valves and flame failure protection systems. These safety mechanisms ensure that the units operate reliably while providing peace of mind to users.

American Water Heater's gas-fired commercial water heaters also offer a range of capacities, catering to different operational needs. Models are available in various sizes, ensuring that no matter the volume of hot water required, there is a solution that fits.

In conclusion, American Water Heater's gas-fired commercial water heaters combine durability, efficiency, and advanced technology, making them suitable for a wide array of applications. With their focus on safety and performance, these units stand out as a top choice for businesses seeking a reliable hot water solution.