Lochinvar 151-286 Outdoor Knight Boiler How it works, Stainless steel heat exchanger

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Outdoor Knight Boiler Installation & Operation Manual

The Outdoor Knight Boiler - How it works...

1.Stainless steel heat exchanger

Allows system water to flow through specially designed coils for maximum heat transfer, while providing protection against flue gas corrosion. The coils are encased in a jacket that contains the combustion process.

2.Combustion chamber access cover

Allows access to the combustion side of the heat exchanger coils.

17.Manual air vent

Designed to remove trapped air from the heat exchanger coils.

18.High voltage junction box

The junction box contains the connection points for the line voltage power and all pumps.

19.Boiler drain port

Location from which the heat exchanger can be drained.

3.Blower

The blower pulls in air and gas through the venturi (item 5). Air and gas mix inside the blower and are pushed into the burner, where they burn inside the combustion chamber.

4.Gas valve

The gas valve senses the negative pressure created by the blower, allowing gas to flow only if the gas valve is powered and combustion air is flowing.

5.Venturi

The venturi controls air and gas flow into the burner.

6.Flue gas sensor (limit rated)

This sensor monitors the flue gas exit temperature. The control module will modulate and shut down the boiler if flue gas temperature gets too hot. This protects the flue pipe from overheating.

7.Boiler outlet temperature sensor (housed with the high limit sensor)

This sensor monitors boiler outlet water temperature (system supply). If selected as the controlling sensor, the control module adjusts boiler firing rate so the outlet temperature is correct.

8.Boiler inlet temperature sensor

This sensor monitors return water temperature (system return). If selected as the controlling sensor, the control module adjusts the boiler firing rate so the inlet temperature is correct.

9.Temperature and pressure gauge (field installed, not shown)

Monitors the outlet temperature of the boiler as well as the system water pressure.

10.Electronic LCD display

The electronic display consists of 4 buttons, a navigation dial and a multiple line liquid crystal display.

11.Flue pipe adapter

Allows for the connection of the vent system to the boiler.

12.Burner (not shown)

Made with metal fiber and stainless steel construction, the burner uses pre-mixed air and gas and provides a wide range of firing rates.

13.Water outlet (system supply)

NPT water connection that supplies hot water to the system, either 1" or 1-1/4", depending on the model.

14.Water inlet (system return)

NPT water connection that returns water from the system to the heat exchanger, either 1" or 1-1/4", depending on the model.

15.Gas connection pipe

Threaded pipe connection, either 1/2" or 3/4", depending on the model. This pipe should be connected to the incoming gas supply for the purpose of delivering gas to the boiler.

16.SMART SYSTEM Control Module

The SMART SYSTEM Control responds to internal and external signals and controls the blower, gas valve, and pumps to meet the heating demand.

20.Low voltage connection board

The connection board is used to connect external low voltage devices.

21.Low voltage wiring connections

Conduit connection points for the low voltage connection board.

22.Condensate drain connection

Connects the condensate drain line to a 1/2" PVC union.

23.Access cover - top front

Provides protection of the control panel / display from outside elements.

24.Access cover - bottom front

Provides access to the burner.

25.Ignition electrode

Provides direct spark for igniting the burner.

26.Flame inspection window

The quartz glass window provides a view of the burner surface and flame.

27.Relief valve

Protects the heat exchanger from an over pressure condition. The relief valve provided with the unit is set at 30 psi.

28.Flame sensor

Used by the control module to detect the presence of burner flame.

29.Line voltage wiring connections

Conduit connection points for the high voltage junction box.

30.Top access cover

Provides access to the internal components.

31.Power switch

Turns 120 VAC ON/OFF to the boiler.

32.Leveling legs

Used to allow the heat exchanger to be leveled. This is needed for the proper draining of the condensate from the combustion chamber.

33.Air pressure switch

The air pressure switch detects blocked inlet conditions.

34.Transformer

The transformer provides 24V power to the integrated control.

35.High limit sensor (housed with the outlet temperature sensor)

Device that monitors the outlet water temperature. If the temperature exceeds its setting, the integrated control will break the control circuit, shutting the boiler down.

36.Gas shutoff switch

An electrical switch designed to cut power to the gas valve to prevent releasing any gas.

37.Over-temp switch (Model 286 Only) (located underneath access cover)

An electrical switch designed to shut down boiler operation in the event the outer back of the heat exchanger, directly above the flue connection exceeds 604°F (318°C). This is a one time switch and could warrant a heat exchanger replacement. Check the integrity of the rear refractory at the back of the upper coil if the switch opens.

38.Air cover

Covers the over-temp switch and the flue collar with flue sensor.

39.Flue pipe assembly

Factory supplied components for a complete venting system.

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Contents Save this manual for future reference Contents When servicing boiler Please read before proceedingOutdoor Knight Boiler How it works Stainless steel heat exchangerModels 151 Model Ratings Outdoor Knight Boiler Ahri RatingDetermine boiler location Installation must comply withBefore locating the boiler, check Outdoor vent / air intake location Flooring and foundation Provide clearancesPrevent combustion air contamination Remove boiler from wood pallet Prepare boilerGas conversions Leveling the boiler 286Hydronic piping Near boiler piping components System temperature sensor Near boiler piping connectionsCirculator sizing Indirect water heatersFeet PressureModel Minimum Pipe Pump Size GrundfosSmart System / Multi-temperature loop control option Variable speed pump setupVariable speed pump option UP26-96 FC/VS IFC VS Stratos 1.25 3 xZone #1 Number of Units Model Required Pipe Sizes 6Single Boiler Multiple Temperatures 151 211 286 IMG00374 Number of Units 10Multiple Boilers Non-Zoned Primary/Secondary Piping Connecting gas supply piping Gas connectionsNatural gas Propane GasCheck inlet gas supply Single Unit Natural Gas Pipe Capacity ChartLength of Pipe in Straight Feet for 1/2 PSI Gas valve replacement Gas PressureField wiring Installation must comply withLine voltage connections Low voltage connectionsOutdoor temperature sensor High gas pressure switchLow gas pressure switch ThermostatFlow switch Runtime contacts Alarm contactsWiring of the cascade System supply sensor3Low Voltage Field Wiring Connections 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 PropaneConfiguration of the cascade Verify DHW modeSet domestic hot water DHW operation Operating information GeneralHow the boiler operates How the control module operatesTemperature control Protection featuresBoiler temperature regulation Outdoor reset operation CascadeSequence of operation Operation DisplayStandby, ready to start a new cycle Access modes InstallerOutdoor Knight boiler control module UserCall for Heat Operating information Dial Function Service technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check boiler relief valveCheck ignition ground wiring Check all boiler wiringCheck control settings Check flame signalCleaning boiler heat exchanger Review with ownerOiled bearing circulators Model Kit Part Component Number DescriptionDiagrams PC Interface120 VAC High Voltage

151-286 specifications

Lochinvar 151-286 is a high-efficiency water heater designed for both residential and commercial applications. This model stands out due to its advanced technology, user-friendly controls, and robust construction, making it a reliable choice for those seeking to optimize their hot water supply.

One of the key features of the Lochinvar 151-286 is its impressive heating capacity. With a maximum input of 286,000 BTU/hr, it can efficiently meet hot water demands for a variety of settings, including hotels, restaurants, and other commercial facilities. This substantial output ensures that even during peak usage hours, hot water availability is maximized, reducing wait times and enhancing customer satisfaction.

The water heater utilizes a state-of-the-art condensing technology that maximizes efficiency by capturing and utilizing flue gas heat. This process allows the Lochinvar 151-286 to achieve an impressive thermal efficiency rating of up to 98%. The benefit of such high efficiency translates to significant energy savings and reduced operational costs over time, making it an environmentally friendly option as well.

The Lochinvar 151-286 is equipped with a user-friendly control system featuring advanced microprocessor controls. These controls allow for precise temperature management and monitoring, enabling users to set optimal temperatures according to their specific needs. Additionally, the heater includes built-in diagnostics, allowing for easy troubleshooting and maintenance, which minimizes downtime and extends the life of the unit.

Another standout characteristic of the Lochinvar 151-286 is its durable construction. Built with high-quality materials, including a robust stainless steel heat exchanger, this model is designed to withstand the rigors of daily use. The unit also features a compact design, which facilitates easy installation in various locations, whether it be in a utility closet or alongside existing equipment.

Safety features are paramount in the Lochinvar 151-286, with multiple safeguards in place to protect against overheating and other potential issues. The unit is designed to operate reliably, ensuring peace of mind for users who depend on consistent hot water availability.

In summary, the Lochinvar 151-286 water heater combines high capacity, exceptional efficiency, and user-friendly technology, making it an excellent choice for those seeking reliable hot water solutions. Its advanced features deliver performance and durability that stand out in the competitive market of water heating systems.