Lochinvar 81 - 286 operation manual Near boiler piping components

Page 35

6 Hydronic piping (continued)

Relief valve and temperature and pressure gauge installation

Basic steps are listed below to guide you through the installation of the relief valve and the temperature and pressure (T & P) gauge provided with the unit.

1.Install the tee with the 3/4 inch fitting positioned vertically and on the top as shown in FIG. 6-1.

2.Install the relief valve into the 3/4 inch fitting of the tee installed in Step 1 (FIG. 6-1).

3.Install a field provided close nipple and tee with the fitting positioned vertically on the top on the downstream side of the relief valve (see FIG. 6-1).

4.Install the temperature and pressure gauge provided with the unit into the top fitting of the tee (a bushing may be necessary) installed in Step 3 (FIG. 6-1).

Figure 6-1Relief Valve / T & P Installation

RELIEF VALVE

TEMPERATURE &

PRESSURE GAUGE

TEE W/FITTING ON TOP (FIELD PROVIDED)

CLOSE NIPPLE

(FIELD PROVIDED)

TEE WITH 3/4” FITTING ON TOP

CLOSE NIPPLE

Near boiler piping components

1.Boiler system piping:

Boiler system piping MUST be sized per the pipe requirements listed in Table 6A. Reducing the pipe size can restrict the flow rate through the boiler, causing inadvertent high limit shutdowns and poor system performance. Flow rates are based on 20 feet of piping, 4 - 90° elbows, and 2 - fully ported ball valves.

2.Boiler system pump:

A Grundfos UPS26-99F pump will be provided by the factory (for standard altitude models) as the boiler circulation pump based on 20 feet of piping, 4 - 90° elbows, and 2 - fully ported ball valves.

Installation & Operation Manual

Knight boilers are capable of controlling a variable speed boiler circulator. Variable speed circulators MUST be sized to meet the specified minimum flow requirements listed in FIG. 6-3 on page 37 at full

speed.

3.Domestic hot water circulating pump:

Field supplied. The pump MUST be sized to meet the specified minimum flow requirements listed in FIG. 6-3. Consult the indirect water heater operating guide to determine flow characteristics for the selected product used.

4.Boiler isolation valves:

Field supplied. Full port ball valves are required. Failure to use full port ball valves could result in a restricted flow rate through the boiler.

5.Check valves:

Field supplied. Check valves are recommended for installation as shown in FIG.’s 6-4 thru 6-10. Failure to install check valves could result in a reverse flow condition during pump(s) off cycle.

6.Domestic indirect hot water isolation valves:

Field supplied. Full port ball valves are required. Failure to use full port ball valves could result in a restricted flow rate through the boiler.

7.Anti-scald mixing valve:

Field supplied. An anti-scald mixing valve is recommended when storing domestic hot water above 115°F.

8.Unions:

Field supplied. Recommended for unit serviceability.

9.Temperature and pressure gauge:

Factory supplied. The temperature and pressure gauge is shipped loose. It is the responsibility of the contractor to install the temperature and pressure gauge on the boiler water outlet.

10.Pressure relief valve:

Factory supplied. The pressure relief valve is sized to ASME specifications.

11.Boiler purge valve:

Field supplied. The boiler purge valve is used to remove entrapped air from the heat exchanger during start-up.

12.System temperature sensor:

Lochinvar supplies a system temperature sensor. The sensor is to be installed in the heating loop downstream from the boiler hot water piping and heating loop junction. Typically the sensor will be located far enough downstream to sense system diluted water temperature.

35

Page 34 Page 36
Image 35
Page 34 Page 36
Contents Models 81 Contents Please read before proceeding When servicing boilerStainless steel heat exchanger Knight Boiler How it worksModels 81 Model Knight Boiler =B=R Rating RatingsBefore locating the boiler, check Installation must comply withCloset and alcove installations Determine boiler location1Closet Installation Minimum Required Clearances Flooring and foundation Residential garage installationProvide air openings to room Vent and air pipingAreas 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 Leveling the boiler Prepare boilerRemove boiler from wood pallet Gas conversionsDirect venting options Sidewall Vent General ventingDirect venting options Vertical Vent, Sidewall Air Direct venting options Vertical VentPVC/CPVC vent piping materials Install vent and combustion air pipingRequirements for installation in Canada Installing vent and air pipingVent Pipe, and Fittings PVC/CPVC air intake/vent connectionsStainless steel vent Air inlet pipe materialsBoiler Flue Intake Air Adapter Termination Boiler FlueBoiler Removing from existing vent Optional room airLength Determine location If using the alternate sidewall terminationSidewall direct venting Vent/air termination sidewall2AClearance to Gravity Air Inlets Prepare wall penetrations Prepare wall penetrations Alternate Field Supplied OptionMultiple vent/air terminations Termination and fittingsDescription and usage Sidewall termination installationSidewall termination optional concentric vent 10 Concentric Multiventing sidewall terminations 12Concentric Vent Sidewall AttachmentVent/air termination vertical Vertical direct venting2Vertical Terminations with Multiple Boilers Prepare roof penetrations Multiple vent/air terminationsVertical termination optional concentric vent Vertical termination installationMultiventing vertical terminations 6Concentric Vent Roof InstallationConcentric Venting Arrangement Alternate vertical concentric venting10Existing Vent as a Chase Existing vent as a chaseHydronic piping Near boiler piping components Strainer Near boiler piping connectionsCirculator sizing Indirect water heatersMinimum Pipe Pump Size Grundfos FeetPressure ModelUP26-96 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 Gas connections Connecting gas supply pipingPropane Gas Natural gasLength of Pipe in Straight Feet for 1/2 PSI Single Unit Natural Gas Pipe Capacity ChartCheck inlet gas supply Gas Pressure Gas valve replacementLow voltage connections Field wiringInstallation must comply with Line voltage connectionsLow gas pressure switch Outdoor temperature sensorLouver proving switch High gas pressure switchModBus Flow switchAlarm contacts Wiring of the cascadeManual Condensate drain Condensate disposalFill and test water system Freeze protection when usedStart-up Check/control water chemistryInspect/check condensate lines and fittings Check for gas leaksCheck thermostat circuits Inspect/fill condensate systemCheck system and boiler Final checks before starting the boilerStart the boiler If boiler does not start correctly2Operating Instructions Natural Gas Propane Set space heating operationSet domestic hot water DHW operation Verify DHW modeConfiguration of the cascade General Operating informationProtection features Boiler temperature regulation Cascade Outdoor reset operation, if usedOperation Display Sequence of operationStandby, ready to start a new cycle Navigation Dial Knight boiler control moduleUser Access modesInstaller Call for Heat Information Dial Function See the Knight User’s Information Manual for Instructions Maintenance Maintenance and annual startupService technician Owner maintenanceCheck expansion tank MaintenanceFlue vent system and air piping Check water systemInspect boiler interior Address reported problemsClean condensate trap Inspect boiler areaCheck flame signal Check ignition ground wiringCheck all boiler wiring Check control settingsKit Part Component Number Description Cleaning boiler heat exchangerReview with owner Oiled bearing circulatorsPC Interface Diagrams2Wiring Diagram
Related manuals
Manual 16 pages 57.5 Kb

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.
Top Page Image Contents