Lochinvar 81 - 286 Alternate vertical concentric venting, Concentric Venting Arrangement

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Installation & Operation Manual

5 Vertical direct venting

Alternate vertical concentric venting

This appliance may be installed with a concentric vent arrangement where the vent pipe is routed through an existing unused venting system; or by using the existing unused venting system as a chase for vent and combustion air routing.

Figure 5-8Concentric Vent Example 1

FLUE EXHAUST

SEAL

Concentric Venting Arrangement

The venting is to be vertical through the roof. The annular space between the O.D. of the vent pipe and the I.D. of the existing unused venting system is utilized for the combustion air source.

The minimum size of the existing vent system required to achieve enough annular space for combustion air can be found in Table 5A below.

The upper and lower termination as well as any other unsealed joints in the existing vent system must be sealed to ensure that all combustion air is drawn from under the vent cap as shown in FIG.’s 5-8 and 5-9.

AIR INLET W/ SCREEN

12"

MIN.

COMBUSTION AIR

EXISTING

SEAL

SEALED

CAP

Approved venting materials must be used as specified in Table 3A on page 17.

FLUE OUTLET

Follow all vent / air termination and clearance requirements per this section to the appropriate example. Installation must comply with local requirements and with the National Fuel Gas Code.

*For concept illustration only. Individual installations

may vary due to job site specific equipment.

Figure 5-9Concentric Vent Example 2

The maximum allowable equivalent vent and air intake lengths for this venting arrangement are to be determined from the General Venting Section.

If an existing unused venting system is converted for use with this method of concentric venting, the installer must ensure that the existing venting system is clean and free from particulate contamination that will harm this appliance and cause increased nuisance calls or maintenance. See Table 1A on page 11 for a list of corrosive contaminants and sources.

Two example scenarios of a concentric venting arrangement are shown for illustrative purposes in FIG.’s 5-8 and 5-9.

Table 5A Alternate Vertical Concentric Vent / Chase Sizes

Model

Vent / Air

Minimum Existing

Inlet Size

Vent / Chase Size

 

 

 

 

81 - 211

3"

5"

286

4"

7"

SEAL

AIR INLET W/ SCREEN

SEAL

FLUE EXHAUST

COMBUSTION AIR

SEAL

 

 

 

 

EXISTING

 

 

 

 

 

 

 

 

 

 

 

 

 

SEALED

 

 

 

 

 

 

CAP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FLUE OUTLET

*For concept illustration only. Individual installations

may vary due to job site specific equipment.

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Contents Models 81 Contents When servicing boiler Please read before proceedingKnight Boiler How it works Stainless steel heat exchangerModels 81 Model Ratings Knight Boiler =B=R RatingInstallation must comply with Closet and alcove installationsDetermine boiler location Before locating the boiler, check1Closet Installation Minimum Required Clearances Residential garage installation Provide air openings to roomVent and air piping Flooring and foundationAreas likely to have contaminants When using an existing vent system to install a new boilerProducts to avoid When removing a boiler from existing common vent system Prepare boiler Remove boiler from wood palletGas conversions Leveling the boilerGeneral venting Direct venting options Sidewall VentDirect venting options Vertical Vent Direct venting options Vertical Vent, Sidewall AirInstall vent and combustion air piping Requirements for installation in CanadaInstalling vent and air piping PVC/CPVC vent piping materialsPVC/CPVC air intake/vent connections Vent Pipe, and FittingsAir inlet pipe materials Stainless steel ventBoiler Flue Intake Air Adapter Termination Boiler FlueBoiler Removing from existing vent Optional room airLength If using the alternate sidewall termination Sidewall direct ventingVent/air termination sidewall Determine location2AClearance to Gravity Air Inlets Prepare wall penetrations Alternate Field Supplied Option Prepare wall penetrationsTermination and fittings Multiple vent/air terminationsDescription and usage Sidewall termination installationSidewall termination optional concentric vent 10 Concentric 12Concentric Vent Sidewall Attachment Multiventing sidewall terminationsVertical direct venting Vent/air termination verticalPrepare roof penetrations Multiple vent/air terminations 2Vertical Terminations with Multiple BoilersVertical termination installation Vertical termination optional concentric vent6Concentric Vent Roof Installation Multiventing vertical terminationsAlternate vertical concentric venting Concentric Venting ArrangementExisting vent as a chase 10Existing Vent as a ChaseHydronic piping Near boiler piping components Near boiler piping connections Circulator sizingIndirect water heaters StrainerFeet PressureModel Minimum Pipe Pump Size GrundfosUP26-96 FC/VS IFC VS Stratos 1.25 3 x Variable speed pump setupVariable speed pump option 4Single Boiler Single Temperature Zoned with Circulators Number of Units 6Single Boiler Multiple Temperatures Number of Units Model Required Pipe Sizes MAY Substitute Number of Units Model 10Multiple Boilers Non-Zoned Primary/Secondary Piping Connecting gas supply piping Gas connectionsNatural gas Propane GasLength of Pipe in Straight Feet for 1/2 PSI Single Unit Natural Gas Pipe Capacity ChartCheck inlet gas supply Gas valve replacement Gas PressureField wiring Installation must comply withLine voltage connections Low voltage connectionsOutdoor temperature sensor Louver proving switchHigh gas pressure switch Low gas pressure switchFlow switch Alarm contactsWiring of the cascade ModBusManual Condensate disposal Condensate drainFreeze protection when used Start-upCheck/control water chemistry Fill and test water systemCheck for gas leaks Check thermostat circuitsInspect/fill condensate system Inspect/check condensate lines and fittingsFinal checks before starting the boiler Start the boilerIf boiler does not start correctly Check system and boiler2Operating Instructions Set space heating operation Natural Gas PropaneSet domestic hot water DHW operation Verify DHW modeConfiguration of the cascade Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if used CascadeSequence of operation Operation DisplayStandby, ready to start a new cycle Knight boiler control module Navigation DialUser Access modesInstaller Call for Heat Information Dial Function Maintenance Maintenance and annual startup Service technicianOwner maintenance See the Knight User’s Information Manual for InstructionsMaintenance Flue vent system and air pipingCheck water system Check expansion tankAddress reported problems Clean condensate trapInspect boiler area Inspect boiler interiorCheck ignition ground wiring Check all boiler wiringCheck control settings Check flame signalCleaning boiler heat exchanger Review with ownerOiled bearing circulators Kit Part Component Number DescriptionDiagrams PC Interface2Wiring Diagram
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81 - 286 specifications

Lochinvar 81 - 286 is a state-of-the-art boiler recognized for its efficiency and reliability in both residential and commercial applications. This high-performance heating solution is designed to meet the diverse needs of users while adhering to modern environmental standards.

One of the standout features of the Lochinvar 81 - 286 is its advanced condensing technology. This allows the unit to harness more heat from the combustion gases, significantly boosting its thermal efficiency. With an impressive efficiency rating of over 95%, users can expect lower energy bills and reduced carbon emissions, making this boiler an environmentally friendly choice.

The Lochinvar 81 - 286 incorporates a robust stainless steel heat exchanger that guarantees durability and longevity. This corrosion-resistant material not only prolongs the unit's life but also ensures consistent performance over time. Additionally, the heat exchanger’s design facilitates optimal heat transfer, further enhancing the boiler's efficiency.

In terms of control, the Lochinvar 81 - 286 features a user-friendly control interface that simplifies operation. The boiler is equipped with advanced modulation capabilities, allowing it to adjust its output based on real-time heating demands. This responsiveness reduces energy waste and optimizes comfort levels within the space it serves.

The boiler also supports a variety of installation configurations, providing flexibility for different building layouts. Its compact design allows for easy installation in restricted spaces, while versatile venting options facilitate integration into various systems.

Safety is a paramount consideration in the design of the Lochinvar 81 - 286. The unit comes with integrated safety features such as a built-in diagnostic system that alerts users to any potential issues before they escalate. This proactive technology helps in maintaining seamless operation and reducing downtime.

Finally, the Lochinvar 81 - 286 is compliant with the latest regulations and industry standards, ensuring that it meets the expectations of both consumers and environmental agencies. With its impressive combination of efficiency, durability, and advanced technology, the Lochinvar 81 - 286 stands out as a top choice for anyone seeking a high-performance heating solution. This boiler not only addresses the immediate needs of heating but also supports long-term sustainability initiatives, proving to be a wise investment for the future.
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