A.O. Smith VB/VW- 750 Grounding Instructions, Inlet Water Considerations, Correct Gas

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Grounding Instructions

This boiler must be grounded in accordance with the National Electrical Code and/or local codes. Boiler is polarity sensitive; correct wiring is imperative for proper operation.

This boiler must be connected to a grounded metal, permanent wiring system, or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the boiler.

Inlet Water Considerations

To minimize the amount of condensate, a minimum inlet water temperature to the heat exchanger of 120°F (49°C) shall be maintained. This temperature can be acquired by returning­ 120°F (49°C) water from the remote storage tank to the boiler or by installing a by-pass loop between the boiler’s­ inlet and outlet connec­tions. When installing a by-pass loop, a remote probe MUST be used, see SYSTEM INSTALLATION.

Circulating water through the boiler and to the remote storage tank (if applicable)­ is accomplished by a pump on VW models only. For hot water heating systems using the VB model, the circulating pump is NOT provided on standard models (optional) and must be field installed.

Correct Gas

MAKE SURE THE GAS ON WHICH THE BOILER WILL OPERATE IS THE SAME AS THAT SPECIFIED­ ON THE BOILER RATING PLATE. DO NOT INSTALL THE BOILER IF EQUIPPED FOR A DIFFERENT TYPE OF GAS — CON­ SULT YOUR SUPPLIER.

Precautions

IF THE UNIT IS EXPOSED TO THE FOLLOWING, DO NOT OPERATE UNTIL ALL CORRECTIVE STEPS HAVE BEEN MADE BY A QUALIFIED SERVICE AGENT:

1.EXPOSURE TO FIRE.

2.IF DAMAGED.

3.FIRING WITHOUT WATER.

4.SOOTING.

IF THE BOILER HAS BEEN EXPOSED TO FLOODING, IT MUST BE REPLACED.

Liquefied Petroleum Gas Models

Boilers for propane or liquefied petroleum gas (LPG) are different from natural gas models. A natural gas boiler will not function safely on LP gas and no attempt should be made to convert a boiler from natural gas to LP gas.

LP gas must be used with great caution. It is highly explosive and heavier than air. It collects first in the low areas making its odor difficult to detect at nose level. If LP gas is present or even suspected, do not attempt to find the cause yourself. Leave the building, leaving

doors open to ventilate, then call your gas supplier or service agent. Keep area clear until a service call has been made.

At times you may not be able to smell an LP gas leak. One cause is odor fade, which is a loss of the chemical odorant that gives LP gas its distinctive smell. Another cause can be your physical condition, such as having a cold or diminishing sense of smell with age. For these reasons, the use of a propane gas detector is recommended.

IF YOU EXPERIENCE AN OUT OF GAS SITUATION, DO NOT TRY TO RELIGHT APPLIANCES YOURSELF. Call your local service agent. Only trained LP professionals should conduct the required safety checks in accordance with industry standards.

High Altitude Installations

Rated inputs are suitable up to 7000 feet (2134m) elevation. Consult the factory for installation at altitudes over 7000 feet (2134m).

Field Installed Components

When installing the boiler, the following­ components­ MUST be installed:

1)Circulating Pump (Hyd­ronic)

2)Tank Temperature Control Probe (Hot Water Supply)

3)Remote Temperature Control Probe (Hydronic)

4)Storage Tank T&P Relief Valve

5)Manual Gas Shutoff Valve (Supply)

Check the FEATURES AND CONTROLS section for further information.

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Contents Models Safe INSTALLATION, USE and Service General Safety GAS and Electrical Characteristics Dimension and capacity dataCapacity and Flow data Recovery CapacitiesIntroduction ContentsGrounding Instructions PrecautionsHigh Altitude Installations Field Installed ComponentsControl Components Circulating Pump Water Temperature Limit ControlsON/OFF Switch Temperature ProbesVB HOT Water Heating BOILERS, are shipped with a 50 psi Required AbilityLocation Panels and CoversAir Requirements Breathing Hazard Carbon Monoxide Gas Installtion ClearancesChemical Vapor Corrosion LevelingOutdoor Air Through Two Vertical Ducts Outdoor Air Through Two OpeningsOutdoor Air Through One Opening OutdoorAir Through Two HorizontalDuctsAir From Other Indoor Spaces Power Vent Termination Clearances Sidewall Power VentDirect Vent Termination Clearances Sidewall Direct VentVenting System Using AL 29-4C Special Installation ConsiderationsConnecting Vent to Boiler Horizontal Installtion Requirements Vertical Installation RequirementsVenting Supports Vertical Termination BELOW. Keep Clear of ALL Obstructions Direct Vent Installation RequirementsDirect Vent Horizontal Direct Vent Using TWT with Vertical Intake General System installationHot Water Heating Hydronic Equipment Thermal Expansion Closed System Remote Probe Installation ProcedureInternal Contaminants Hard Water ConditionsGas Supply Line Sizing Gas ConnectionsTypical PRIMARY, Secondary Piping ONE VF Model VW HOT Water Supply Boiler with Vertical Tank ONE VF Model VW HOT Water Supply Boiler with Horizontal Tank Wiring Suggested Pipe Size For Multiple Gas Appliances Propane Gas Suggested Pipe Size For Multiple Gas Appliances Natural GasConnection Diagram Wiring DiagramPage VB/VW-500, 750 & 1000 Schematic Diagram Purging Gas Line Filling and Purging of Heating Boiler InstallationFilling Hot Water Supply Boiler Installation OperationRisk of Scalds Water Temperature RegulationMCB/FCB Dipswitches MCB Ten Position DipswitchMCB Three position Dipswitch Lighting & Operation Instructions for Models VB/VW 500, 750 Propane AdjustmentSetting of the Test Mode High Fire Setting Natural GASInputs to MCB Operating Sequence Temperature Setpoints System Control AlgorithmUIM Operating Procedures Description of FCB control states OperatingSetpointAdjustmentProcedureHighLimitDifferentialSetpointAdjustment Procedure UIM LED’s Fault Messages and Troubleshooting GuideFault Displayed Description Red LED Lockout Troubleshooting Ignition SystemTroubleshooting Gas Valve Preventative maintenanceMain Burner Blower Compartment Burner MaintenanceRelief Valve Combustion Air FilterReplacement Parts Venting MaintenanceHeatExchangerPreventativeMaintenance Tube Cleaning Procedure Mechanical Removal of DepositsPage Page Page Limited Warranty Tennessee Waltz Parkway, Ashland City, TN Phone

VB/VW- 1000, VB/VW- 750 specifications

A.O. Smith is a renowned name in the water heating industry, and their VB/VW-750 and VB/VW-1000 models reflect the cutting-edge advancements in both design and functionality. These commercial water heaters stand out due to their innovative features and robust characteristics, making them ideal solutions for various applications in commercial settings.

The VB/VW-750 and VB/VW-1000 models are designed with high efficiency in mind. They utilize advanced heat transfer technology that maximizes energy use, translating to significant savings on utility bills. These units are engineered to deliver consistent hot water supply, essential for businesses such as restaurants, hotels, and manufacturing facilities where extensive hot water demands are necessary.

One of the standout features of the VB/VW models is their high recovery rate. This means they can produce a large volume of hot water within a short period, catering to peak demand times without compromising performance. Additionally, the units come equipped with a durable tank made from high-quality materials to resist corrosion, which ensures a long lifespan and reliability in service.

The VB/VW-750 and VB/VW-1000 are also equipped with advanced control systems. These systems provide precise temperature regulation, improving safety and energy efficiency. The smart pumping system further enhances performance by optimizing water flow and reducing energy consumption during operation.

Maintenance and serviceability are key characteristics of these models. They feature easy access to critical components, allowing for quick inspections and repairs. This design consideration minimizes downtime, which is crucial for any business reliant on continuous hot water supply.

Both models are compliant with various industry standards, including energy efficiency regulations. A.O. Smith has focused on ensuring these water heaters not only meet but exceed these requirements, contributing to sustainability efforts.

In summary, the A.O. Smith VB/VW-750 and VB/VW-1000 models combine efficiency, reliability, and ease of maintenance. Their advanced features and cutting-edge technologies make them a top choice for commercial hot water applications, positioning A.O. Smith as a leader in the water heating industry. With their strong performance and durability, these models are designed to meet the demands of modern businesses while providing peace of mind regarding hot water availability.
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