American Water Heater (A)BCG3 85T500-8N, (A)BCG3 85T500-8P General, Filling, Adjustments

Page 23

OPERATION

IMPORTANT

A qualified person must perform the initial firing of the heater. At this time the user should not hesitate to ask the individual any questions which they may have in regard to the operation and maintenance of the unit.

An Operational Checklist is included on page 33 of this manual. By using this checklist the user may be able to make minor operational adjustments and avoid unnecessary service calls. However, the user should not attempt repairs which are not listed under the USER column.

General

NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER.

SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE.

Before proceeding with the operation of the unit make sure the water heater and system are filled with water and all air is expelled.

Filling

1.Close the heater drain valve by turning handle clockwise.

2.Open a nearby hot water faucet to permit the air in the system to escape.

3.Fully open the cold water inlet pipe valve allowing the heater and piping to be filled.

4.Close the hot water faucet as water starts to flow.

5.The heater is ready to be operated.

THE GAS VALVE MUST HAVE BEEN IN THE OFF POSITION FOR AT LEAST 5 MINUTES. This waiting period is an important safety step. Its purpose is to permit gas that may have accumulated in the combustion chamber to clear. IF YOU DETECT GAS ODOR AT THE END OF THIS PERIOD DO NOT PROCEED WITH LIGHTING. RECOGNIZE THAT GAS ODOR, EVEN IF IT SEEMS WEAK, MAY INDICATE PRESENCE OF ACCUMULATED GAS SOMEPLACE IN THE AREA WITH RISK OF FIRE OR EXPLOSION. SEE THE FRONT PAGE FOR STEPS TO BE TAKEN.

All gas and water lines must be leak tested and open.

Read SEQUENCE OF OPERATION section of this manual prior to lighting and operating this appliance.

With above conditions satisfied, start the unit in accordance with the instructions on the operating label attached to the heater. For your convenience a copy of the instructions are shown on page

24.Each heater is equipped with an ignition control board. The controller will try three times to light the main burner before going into lockout. After the controller tries three times, it will wait one hour before trying to light the unit again. This cycle will continue until the main burners are ignited or the unit is shut down.

ADJUSTMENTS

ON INITIAL STARTUP SOMEADJUSTMENTSARE NECESSARY.

1.CHECK MANIFOLD AND INLET GAS PRESSURES.

2.CYCLE CHECK - CHECK AT LEAST ONE BURNER OPERATION - WHEN THERMOSTAT IS SATISFIED, BURNER WILL SHUT OFF AND INDUCER WILL STOP RUNNING. ON CALL FOR HEAT - THE INDUCER WILL COME ON AND CLOSE THE PRESSURE SWITCH AND THE IGNITION SEQUENCE DESCRIBED ABOVE WILL BEGIN, SEE “SEQUENCE OF OPERATION”.

SEQUENCE OF OPERATION

The following information will describe the Sequence of Operation for this appliance.

1.Switch power on to unit.

2.Thermostat calls for heat.

3.Ignition Control Board performs diagnostic check on system components.

4.On completion of diagnostics check, the Ignition Control Board sends signal to Exhaust Inducer.

5.Exhaust Inducer begins drawing air through appliance closing the Prover Switch.

6.On completion of Prover Switch engagement, the Ignition Control Board begins the ignition cycle.

7.The Ignition Control Board provides power to the Silicon Nitride Ignitor.

8.The Silicon Nitride Ignitor heats up for approximately 17 to 20 seconds.

9.At the end of Silicon Nitride Ignitor’s warm-up, the Ignition Control Board opens the Gas Valve.

10.From the time the Gas Valve opens, the Ignition Control

Board waits 3 seconds and then shuts off power to the Silicon Nitride Ignitor.

11.From the time the Silicon Nitride Ignitor’s power is shut off, the Ignition Control Board waits 3 more seconds to monitor the Flame Sensor.

12.If the Flame Sensor does not detect a strong enough flame, the Ignition Control Board shuts off the Gas Valve and allows the Exhaust Inducer to purge the unit for 20 seconds. At that time, the Ignition Control Board restarts with step 7. It will try and ignite the main burners 2 more times. If the unit does not light, the Ignition Control Board will wait one hour and then restart at step 3. This cycle will continue until the unit lights or the power is shutoff to the unit.

13.If the Flame Sensor detects a strong flame, the Ignition Control Board will allow the unit to operate until the thermostat is satisfied.

14.Once the unit is satisfied, the Ignition Control Board will shut off the Gas Valve and the unit will be in standby mode until another call for heat is initiated by the thermostat.

See the flow chart on page 32 for more information.

23

Page 22 Page 24
Image 23
Page 22 Page 24
Contents Commercial gas water heaters Table Of Contents Asme CRN Safe Installation, Use and ServiceFire and Explosion Hazard General Safety InformationHydrogen Gas Flammable PrecautionsGrounding Instructions Qualifications IntroductionAbbreviations Used Features and components 2 NPT Installation considerationsRough In Dimensions Model Right Left Back Ceiling Side Locating the Water HeaterClearances Circulation Pumps Installation On Combustible FlooringInsulation Blanket Hard WaterNatural Gas Installations Propane InstallationsHigh Altitude Installations Gas Pressure Requirements Installation RequirementsPower Supply Water Temperature Controland Mixing ValvesThermal Expansion Temperature-Pressure Relief ValveDishwashing Machines Closed Water SystemsAir Requirements Contaminated AirVent Adapter VENTING InstallationUnconfined Space Confined SpaceOutdoor Air Through One Opening Multiple Heater ManifoldFresh Air Openings For Confined Spaces Outdoor Air Through Two OpeningsAir From Other Indoor Spaces Outdoor Air Through Two Vertical DuctsMultiple Gas Fired Tank-Type Heaters Technical Data VentingValve Discharge Pipe Water heater installationWater Line Connections Code Restrictions Installation Diagrams Top Inlet/Outlet UsageHeater Wiring GAS Supply Pipe Length Feet Gas PipingPurging Gas Pressure RegulatorFilling AdjustmentsGeneral Lighting & Operation Label For Your Safety Read Before OperatingMain Burner Check the Igniter AssemblyIgniter Assembly Check VentingChecking the Input MAINTENANCERemote Storage Tank Temperature Control Temperature-Pressure Relief Valve TestTo Drain the Water Heater Storage Tank Hot Water OdorAnode Rod Inspection Draining and FlushingDeliming Solvents Tank Cleanout ProcedureDeliming Using Flo-Jug Method Chemical Hazard For your information AIR in HOT Water Faucets High Water Temperature Shut OFF SystemSequence of Operation Flow Chart Complaint Cause Remedy User Service Agent Operational checklistWater Piping DiagramsTemperature & Pressure Temperature & Pressure Relief Valve Circulating Pump Multi Flue 2 Units Multi Flue 2 Units with Vertical Storage Tank Multi Flue 2 Units with Vertical Storage Tank Return from Multi Flue 2 Units TWO Temperature Multi Flue 2 Units with Booster TWO Temperature MULTI-FLUE 3 Units MULTI-FLUE 3 Units with Vertical Storage Tank MULTI-FLUE 3 Units with Horizontal Storage Tank Multi Flue Flue 4 Units MULTI-FLUE 4 Units with Vertical Storage Tank MULTI-FLUE 4 Units with Horizontal Storage Tank Manifold Kits For Technical ASSISTANCE, Service or Warranty Information

(A)BCG3 85T500-8N, (A)BCG3 85T500-8P specifications

American Water Heater has long been a trusted name in the industry, providing high-quality solutions for residential and commercial water heating needs. Among its impressive lineup of products, the (A)BCG3 85T500-8P and (A)BCG3 85T500-8N models stand out due to their outstanding efficiency, performance, and innovative technologies.

These water heaters are primarily classified as high-efficiency gas water heaters, designed to meet a variety of usage demands. With a robust design and advanced technological features, they cater to homes and businesses that require reliable and energy-efficient hot water solutions.

One of the most notable features of the (A)BCG3 85T500-8P and (A)BCG3 85T500-8N models is their remarkable thermal efficiency. They are engineered to optimize energy usage, which not only helps reduce utility bills but also minimizes environmental impacts. This energy efficiency is achieved through advanced insulation and heat exchange technologies that maintain water temperature with minimal energy expenditure.

Both models come equipped with a powerful gas burner that allows for rapid heating, making them ideal for high-demand scenarios. The innovative burner technology ensures even heat distribution, significantly reducing recovery time and ensuring that hot water is available whenever needed.

In terms of safety, American Water Heater has incorporated several features to protect users and the unit itself. These include safety shut-off valves and temperature control features that prevent overheating and provide peace of mind.

Durability is another hallmark of these models. Constructed with high-quality materials, they resist the wear and tear commonly associated with traditional water heaters. Furthermore, the design of the (A)BCG3 85T500-8P and (A)BCG3 85T500-8N emphasizes ease of maintenance, allowing for simpler servicing and reduced downtime.

Finally, both models are backed by American Water Heater's commitment to customer satisfaction, supported by comprehensive warranties and reliable customer service. This assurance adds value to their products, making them a preferred choice for consumers seeking efficient and dependable water heating solutions.

In conclusion, the (A)BCG3 85T500-8P and (A)BCG3 85T500-8N models exemplify American Water Heater’s dedication to innovation and efficiency, making them excellent options for anyone in need of advanced water heating technology.
Top Page Image Contents