Lochinvar 495, 065, 000 - 2 Low Water Cutoff, Relief Valve, Water Flow Switch, If Equipped

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Installation and Service Manual

Low Water Cutoff

(If Equipped)

If installing this unit above radiation level, you must install a low water cut-off device at the time of appliance installation. Electronic or float type low water cutoff controls are available as a factory supplied option on all units. Inspect the low water cutoff every six months, including flushing of float types. The low water cutoff control is located on the control panel directly behind the control panel cover.

The reset and test buttons (if equipped) are located on the control panel.

Figure 22 - Water Connections

Relief Valve

This unit is supplied with a relief valve(s) sized in accordance with ASME Boiler and Pressure Vessel Code, Section IV ("Heating Boilers"). The relief valve(s) is installed in the vertical position and mounted in the hot water outlet. Place no other valve between the relief valve and the unit. To prevent water damage, pipe the discharge from the relief valve to a suitable floor drain for disposal when relief occurs. Do not install any reducing couplings or other restrictions in the discharge line. The discharge line will allow complete drainage of the valve and line. Manually operate the relief valves at least once a year.

￿CAUTION: Avoid contact with hot discharge water.

Water Flow Switch

A water flow switch is factory installed. The flow switch is wired in series with the 24 VAC safety control circuit at the units terminal strip. This wiring connection installs the flow switch in the 24 VAC safety circuit to prove water flow before main burner ignition. The factory supplied flow switch is installed in the outlet side of the front header. These units require a minimum flow of 26 GPM to make the flow switch and start burner operation. Ensure that the pump installed on the unit will supply adequate flow to make the flow switch contacts and operate the unit. A water flow switch meets most code requirements for a low water cut off device on appliances requiring forced circulation for operation.

CONNECTING TO ELECTRICAL SUPPLY

This unit is wired for 120 VAC service. The unit, when installed, must be electrically grounded in accordance with the requirements of the authority having jurisdiction or in the absence of such requirements, with the latest edition of the National Electrical Code ANSI/NFPA No. 70. When the unit is installed in Canada, it must conform to the CAE C22.1, Canadian Electrical Code, Part 1 and/or local Electrical Codes.

1.Use only Type-T wire [63°F (35°C) rise] on all wiring between the unit and field-installed devices.

2.Enclose line voltage wire exterior to the unit in approved conduit or approved metal-clad cable.

3.The pump must run continuously when the unit is being fired (hot water heating boilers must use the optional pump delay if the pump is to be cycled. See Freeze Protection, page 7 when cycling the pump). Water heaters use the pump delay as standard in accordance with ASHRAE 90.1 requirements.

4.To avoid serious damage, do not energize the unit until the system is filled with water.

5.Provide the unit with proper overload protection.

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Contents Save this manual for future reference Domestic Water HeatersHydronic Heating Boilers and Domestic Water Heaters General Product Information Safety InformationHydronic Heating Boilers and Domestic Water Heaters Front and Rear View Product IdentificationInstallation Clearances from Combustible ConstructionBase for Combustible Floors Hydronic System Antifreeze Outdoor Boiler InstallationShut-Down and Draining Pump OperationInstalling Combustion Air Filter Freeze Protection for a Heating Boiler System if requiredCombustion Air Filter One Opening Combustion Air OptionsGeneral Information Installation VentingExhaust Fans Venting SupportTABLE-A Table B Vent System OptionsFlue Pipe Sizes TABLE-CNegative Draft Conventional Negative Draft VentingFlue Outlet Piping Common Venting SystemsMasonry Chimney Installations Outdoor Installation VentingOutdoor Vent Kits Table DOutdoor Vent/Air Inlet Location Outdoor Vent KitGas Pressure Test Gas PipingInput Max Min Gas Train and Controls Connecting Gas Piping to UnitCombination Gas Valves Checking Gas Supply PressureVenting of Combination Gas Valves Measuring Gas Supply Pressure at Combination Gas Valve Gas Manifold Pressure AdjustmentRegulator Pressure Less Front Chamber Pressure NET Manifold PressureLow Water Cutoff Water Flow SwitchRelief Valve If EquippedTerminal Strip Connection Options Table JNominal AMP Draw Data General Plumbing Rules Water Connections Heating Boilers OnlyPrimary/Secondary Boiler Piping Low Temperature Return Water Systems Radiant Floor and Snow Melt Heating SystemsInput LTV Valve Kit Btu/hr System Temperature Rise Chart Based on Btu/hr Input Installation with a Chilled Water SystemTable L 10ºF 20ºF 30ºF 40ºF 50ºF 60ºFBoiler Flow Rate Temperature/Pressure GaugeBoiler Bypass Requirements Filling the SystemLighting Instructions OperationTo Turn Off Gas To Appliance Locating Temperature ControlTable M Temperature Control SettingsSet Point Maximum Set Point DeterminationHigh-Fire Offset Outdoor Air Reset OptionShutdown Outdoor Air Max O.A. MaxPlacement of Sensors Temperature Control SensorsBoiler Application Water Heater ApplicationWire Maximum Gauge Remote Wire ConnectionHot Surface Igniter and Ignition Control Module Table NHot Surface Ignition Control Module Diagnostic Status IndicationIgnition and Control Timings Ignition Module Lockout FunctionsStatus LED Diagnostic Codes Table OTable P Temperature Rise Chart Required Temperature RiseDomestic Water Heaters Water Velocity ControlWater Chemistry Pipe Sizing ChartCirculating Pump Table RDomestic Water Temperatures Potable Hot Water Temperature Control SettingsDomestic Water Minimum Pump PerformanceLocation of Cold Water Supply Piping Connections High Water Temperature Limit ControlOptional Relief Valve Thermal ExpansionFlue Gas Passageways Cleaning Procedures Cleaning MaintenanceHeat Exchanger Cleaning ElectricalCombustion and Ventilation Air Cleaning and Maintenance Set Up ProcedureAdjustment Procedure 495,000 1,255,000 Btu/hr Models Servicing Hot Surface Igniter and Ignition Module Ignition System Checkout Sequence of OperationON/OFF Rocker Switch Power SupplyManual Reset High-Limit Thermostat Safety Device TerminalsElectronic Temperature Controller Ignition ModuleHeat Transfer Process Gas Valves, Burner BTU/HR Schematic DiagramHI-LIMITS PWR SW Main Unit GAS Valves Blower Pressure Switch 15AMPS Wiring DiagramControl BOX Connections Control BOX Connections

000 - 2, 065, 495 specifications

Lochinvar 000 - 2,495,065 is a cutting-edge water heating solution designed to meet the needs of modern residential and commercial applications. This high-efficiency unit combines advanced engineering with robust technologies, providing unmatched performance and reliability.

One of the standout features of the Lochinvar 000 - 2,495,065 is its high thermal efficiency, which often exceeds 95%. Utilizing condensing technology, the unit harnesses heat from exhaust gases, allowing it to recover otherwise lost energy, thereby reducing operational costs significantly. This efficiency not only lowers energy bills for users but also lessens the environmental impact by minimizing greenhouse gas emissions.

The Lochinvar 000 - 2,495,065 is equipped with a lightweight stainless steel heat exchanger. This construction ensures exceptional corrosion resistance and longevity, extending the lifespan of the unit while maintaining optimal performance. The stainless steel design also contributes to faster heating times, making it ideal for high-demand environments.

In terms of control technologies, the Lochinvar 000 - 2,495,065 features an intuitive touchscreen interface. This user-friendly design allows for seamless operation, real-time monitoring, and easy adjustments to temperature settings. Additionally, it facilitates remote diagnostics, promoting efficient maintenance and reducing downtime, which is crucial for busy facilities.

For enhanced safety, the Lochinvar 000 - 2,495,065 includes multiple safety mechanisms, such as over-temperature protection, flame safeguard, and leak detection systems. These safety features ensure secure operation and give users peace of mind.

Moreover, the unit is compatible with various fuel sources, including natural gas and propane, making it versatile and adaptable to different infrastructure requirements. This flexibility ensures that the Lochinvar 000 - 2,495,065 can be integrated into various settings, from residential homes to large commercial buildings.

Another significant characteristic is its compact design, allowing for easy installation in tight spaces. The footprint of the Lochinvar 000 - 2,495,065 makes it an ideal solution for applications where space is at a premium, without compromising on performance.

In summary, Lochinvar 000 - 2,495,065 represents a premium choice for water heating solutions, merging advanced technologies, high efficiency, and user-friendly design to cater to a wide range of heating needs while ensuring safety and sustainability.
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