Lochinvar 065 Conventional Negative Draft Venting, Flue Outlet Piping, Common Venting Systems

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Installation and Service Manual

1.Conventional Negative Draft Venting

IMPORTANT: Before installing a venting system, follow all venting clearances and requirements found in the Venting, General Information section, page 10.

Figure 14 - Conventional Negative Draft Vertical Venting with Combustion Air Louvers

This option uses Type-B double-wall flue outlet piping. The blower brings in combustion air. The buoyancy of the heated flue products cause them to rise up through the flue pipe. The flue outlet terminates at the rooftop.

Negative Draft

The negative draft in a conventional vent installation must be within the range of 0.02 to 0.08 inches w.c. to ensure proper operation. Make all draft readings while the unit is in stable operation (approximately 2 to 5 minutes).

Connect the flue vent directly to the flue outlet opening on the top of the unit. No additional draft diverter or barometric damper is needed on single unit installations with a dedicated stack and a negative draft within the specified range of 0.02 to

0.08inches w.c. If the draft in a dedicated stack for a single unit installation exceeds the maximum specified draft, you must install a barometric damper to control draft. Multiple unit installations with combined venting or common venting with other Category I negative draft appliances require each boiler to have a barometric damper installed to regulate draft within the proper range.

Do not connect vent connectors serving appliances vented by natural draft (negative draft) to any portion of a mechanical draft system operating under positive pressure. Connecting to a positive pressure stack may cause flue products to be discharged into the living space causing serious health injury.

Flue Outlet Piping

With this venting option, you must use Type-B double-wall (or equivalent) vent materials. Vent materials must be listed by a nationally-recognized test agency for use as vent materials. Make the connections from the unit vent to the outside stack as direct as possible with no reduction in diameter. Use the National Fuel Gas Code venting tables for double-wall vent to properly size all vent connectors and stacks. Follow the vent manufacturer's instructions when installing Type-B vents and accessories, such as firestop spacers, vent connectors, thimbles, caps, etc.

Provide adequate clearance to combustibles for the vent connector and firestop.

When planning the venting system, avoid possible contact with plumbing or electrical wiring inside walls, ceilings, and floors. Locate the unit as close as possible to a chimney or gas vent.

Avoid long horizontal runs of the vent pipe, 90° elbows, reductions and restrictions.

No additional draft diverter or barometric damper is required on single unit installations with a dedicated stack and a negative draft maintained between 0.02 to 0.08 inches w.c.

Common Venting Systems

You can combine the flue with the vent from any other negative draft, Category I appliance. Using common venting for multiple negative draft appliances requires you to install a barometric damper with each unit. This will regulate draft within the proper range. You must size the common vent and connectors from multiple units per the venting tables for Type- B double-wall vents in the latest edition of the National Fuel Gas Code, ANSI Z223.1 and/or CAN/CGA-B149 Installation Code.

Common venting systems may be too large when an existing unit is removed.

At the time of removal of an existing appliance, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while other appliances remaining connected to the common venting system are not in operation.

1.Seal any unused opening in the common venting system.

2.Visually inspect the venting system for proper size and horizontal pitch. Make sure there is no blockage or restriction, leakage, corrosion and other unsafe conditions.

3.If possible, close all building doors and windows. Close all doors between the space in which the appliances remaining connected to the common venting system are located and other building spaces.

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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 IdentificationClearances from Combustible Construction InstallationBase for Combustible Floors Hydronic System Antifreeze Outdoor Boiler InstallationShut-Down and Draining Pump OperationFreeze Protection for a Heating Boiler System if required Installing Combustion Air FilterCombustion 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 Piping Gas Pressure TestInput Max Min Gas Train and Controls Connecting Gas Piping to UnitChecking Gas Supply Pressure Combination Gas ValvesVenting 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 EquippedTable J Terminal Strip Connection OptionsNominal AMP Draw Data General Plumbing Rules Water Connections Heating Boilers OnlyPrimary/Secondary Boiler Piping Radiant Floor and Snow Melt Heating Systems Low Temperature Return Water 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 FunctionsTable O Status LED Diagnostic CodesTable 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 MaintenanceElectrical Heat Exchanger CleaningCombustion and Ventilation Air Set Up Procedure Cleaning and MaintenanceAdjustment 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 TerminalsIgnition Module Electronic Temperature ControllerHeat 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.

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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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