Lochinvar 495, 065 Location of Cold Water Supply Piping Connections, Optional Relief Valve

Page 39

Installation and Service Manual

Remember, no water heating system provides exact temperatures at all times. Let the system operate a few days at your desired settings to determine correct settings for your needs.

1.These units are equipped with an operating temperature control.

2.The control set points are preset to a low test setting when shipped from the factory.

3.Reset the temperature set points to the lowest settings which will satisfy hot water demands, eliminate a possible condensate problem and prevent a risk of scald injury.

￿WARNING: Return water temperatures must not be less than 140°F (60°C). If lower return wate temperatures are required, folllow the instructions for Low Temperature Return Water Systems, page 25.

4.The High-Fire Offset should normally be adjusted to “0” when supplying potable hot water for domestic use.

5.Stage firing can be achieved by adjusting the High-Fire Offset to any value other than zero. Typically, a setting of 3°F is 5°F is suitable for stage firing in a water heater application. Stage firing of a potable water heater is normally only used to replace system standby heat loss.

6.All stages of burner operation should fire when there is a major draw from the potable hot water storage system. This prevents possible condensate problems and ensures a rapid recovery of the hot water used.

Note: The High-Fire stage will be delayed by approximately 10 seconds to allow a soft start of the water heater.

IMPORTANT: When water is stored at temperatures above 125°F (52°C), a thermostatic mixing valve must be installed on the hot water outlet from the storage tank to supply lower temperature water and prevent the risk of a scald injury.

Note: This water heater, when set at a lower temperature setting, is not capable of producing hot water of sufficient temperature for sanitizing purposes.

Location of Cold Water Supply Piping Connections

Incorrect piping of the cold water supply to the system may result in excessive low temperature operation causing condensate formation on the heat exchanger and operational problems. You must install the cold water supply piping in the discharge piping from the heater to the storage tank. This allows the cold water to be tempered in the storage tank before entering the heater. See Figure 41 and typical installation drawings provided with the unit for correct piping. Higher water temperatures reduce condensate formation.

￿WARNING: Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the electrical supply to the pump. Instead, shut off the gas supply at a location external to the unit.

High Water Temperature Limit Control

The unit is equipped with an adjustable setting, auto-reset high water temperature limit control. The hot water heater temperature limit control has a maximum limit setting of 200°F (93°C). If water temperature exceeds the set point, the limit will break the control circuit and shut down the unit. The limit control will only be reset after the water temperature has cooled below the set point of the limit. The high water temperature limit control is mounted in the outlet side of the front header. A manual reset high water temperature limit control is available as an optional control.

Optional Relief Valve

This water heater is normally supplied with a temperature and pressure relief valve(s) sized in accordance with applicable codes. Units may be supplied with an optional pressure only relief valve(s). When a water heater equipped with this optional relief valve is piped to a separate storage vessel, the storage vessel MUST have a properly installed temperature and pressure relief valve which complies with local codes.

Thermal Expansion

A relief valve which discharges periodically may be due to thermal expansion in a closed system. A hot water supply boiler installed in a closed system, such as one with a backflow preventer or check valve installed in the cold water supply, shall be provided with means to control expansion. Contact the water supplier or local plumbing inspector on how to correct this situation. Do not plug or cap the relief valve discharge!

Cathodic Protection

Hydrogen gas, which is extremely flammable, can be produced in a hot water system that has been unused for a long period of time (generally two weeks or more). To prevent the possibility of injury under these conditions, open the kitchen sink hot water faucet for several minutes before using any electrical appliance connected to the hot water system. If hydrogen is present, there will be an unusual sound such as air escaping through the pipe as the hot water begins to flow. Do not smoke or have open flames near the faucet at this time.

39

Image 39
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 Pump Operation Outdoor Boiler InstallationHydronic System Antifreeze Shut-Down and DrainingInstalling Combustion Air Filter Freeze Protection for a Heating Boiler System if requiredCombustion Air Filter One Opening Combustion Air OptionsVenting Support Installation VentingGeneral Information Exhaust FansTABLE-A TABLE-C Vent System OptionsTable B Flue Pipe SizesCommon Venting Systems Conventional Negative Draft VentingNegative Draft Flue Outlet PipingMasonry Chimney Installations Outdoor Installation VentingOutdoor Vent Kit Table DOutdoor Vent Kits Outdoor Vent/Air Inlet LocationGas 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 PressureIf Equipped Water Flow SwitchLow Water Cutoff Relief ValveTerminal 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 10ºF 20ºF 30ºF 40ºF 50ºF 60ºF Installation with a Chilled Water SystemSystem Temperature Rise Chart Based on Btu/hr Input Table LFilling the System Temperature/Pressure GaugeBoiler Flow Rate Boiler Bypass RequirementsLighting Instructions OperationTo Turn Off Gas To Appliance Locating Temperature ControlMaximum Set Point Determination Temperature Control SettingsTable M Set PointOutdoor Air Max O.A. Max Outdoor Air Reset OptionHigh-Fire Offset ShutdownWater Heater Application Temperature Control SensorsPlacement of Sensors Boiler ApplicationTable N Remote Wire ConnectionWire Maximum Gauge Hot Surface Igniter and Ignition Control ModuleIgnition Module Lockout Functions Diagnostic Status IndicationHot Surface Ignition Control Module Ignition and Control TimingsStatus LED Diagnostic Codes Table OTable P Water Velocity Control Required Temperature RiseTemperature Rise Chart Domestic Water HeatersTable R Pipe Sizing ChartWater Chemistry Circulating PumpMinimum Pump Performance Potable Hot Water Temperature Control SettingsDomestic Water Temperatures Domestic WaterThermal Expansion High Water Temperature Limit ControlLocation of Cold Water Supply Piping Connections Optional Relief ValveFlue 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 OperationSafety Device Terminals Power SupplyON/OFF Rocker Switch Manual Reset High-Limit ThermostatElectronic 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.