Lochinvar 399 operation manual Set space heating operation, Natural Gas Propane

Page 54

10 Start-up

Check flame and combustion (continued)

4.Place the boiler into the active position by pressing the SHUTDOWN button on the display board (FIG. 11-1, page 61) until BLR:Standby appears in the display window.

5.Locate the pinhole button above the “T” in the Knight XL logo on the display board (FIG. 11-1). Insert a thin wire (such as a paper clip) into the hole and press the button once and hold for 5 seconds to place the boiler into Service Mode. In Service Mode the boiler will fire at ignition speed and will then modulate up to full fire.

6.Insert the probe from a combustion analyzer into the hole left by the removal of the flue temperature sensor.

7.Once the boiler has modulated up to full fire, measure the combustion. The values should be in the range listed in Table 10A below. The CO levels should be less than 150 ppm for a properly installed unit.

If the combustion is not within the specified range, reference the Troubleshooting Section of the Knight XL Service Manual for possible causes and corrective actions.

Table 10A Flue Products Chart

Natural Gas

Propane

 

 

 

 

CO2

O2

CO2

O2

8.0% - 10%

3.0% - 6.5%

9.0% - 11%

4.1% - 6.9%

 

 

 

 

8.Once the combustion analysis is complete, test the safety shutoff device by turning the manual shutoff valve to the OFF position and ensuring that the boiler shuts down and registers an alarm. Open the manual shutoff valve, reset the control, and return to Service Mode.

9.Turn the main power off to the boiler and replace the flue temperature sensor into the flue pipe connection.

10.Place the boiler back into normal operation.

￿WARNING You must replace the flue gas temperature sensor to prevent flue gas

spillage into the room. Failure to comply could result in severe personal injury, death, or substantial property damage.

54

Installation & Operation Manual

Set space heating operation

Determine controlling sensor

For space heating systems, the temperature control can be based on one of three sensors; the inlet, outlet, or system supply sensor. The SMART SYSTEM control is programmed at the factory to control the temperature of the outlet sensor. The control will automatically switch to the system supply sensor once it is connected. If it is desired to base the temperature control on the inlet sensor, the appropriate parameter must be changed in the control. See the Knight XL Service Manual for a detailed explanation of this procedure.

Verify space heat circulator mode

The Space Heating Mode controls both the system (primary) pump (if connected), and the boiler (secondary) pump. When the SMART SYSTEM control receives a space heating call for heat, it turns on the system pump. If the boiler is not heating an indirect DHW (Domestic Hot Water) tank, it also turns on the boiler pump. After the space heating call for heat ends, the system pump continues to run for a short period of time. If the boiler pump was running, it continues to run for a short period of time as well. These pump delays are factory set to 30 seconds. If different delays are desired, the appropriate parameters in the control must be changed. See the Knight XL Service Manual for a detailed explanation of this procedure.

Set space heating set point temperature

The UP and DOWN keys may be used during normal operation to adjust the space heating set point temperature. Once the desired temperature is displayed, press the ENTER/RESET key to save the new setting. If the ENTER/RESET key is not pressed, the new setting will be used for the current heating cycle only. The old setting will become active after the current heating cycle ends.

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Contents Models 399 Save this manual for future referenceContents When servicing boiler Please read before proceedingKnight XL How it works Air pressure switch Pump relay board ModelModels 600 Ratings Knight XL Boiler =B=R RatingDetermine boiler location Installation must comply withCloset and alcove installations Before locating the boiler, checkFor closet installations, Cpvc or TOPVent and air piping Residential garage installationProvide air openings to room Flooring and foundationWhen using an existing vent system to install a new boiler Products to avoidAreas likely to have contaminants When removing a boiler from existing common vent system Model Prepare boilerRemove boiler from wood pallet Gas conversionsLeveling the boiler Models 600General venting Direct venting options Vertical Vent Installing vent or air piping Install vent and combustion air pipingRequirements for installation in Canada General ventingPVC/CPVC air intake/vent connections Approved Stainless Steel Vent ManufacturersMake Air inlet pipe materials Stainless steel ventFasNSeal Saf-T Vent Stainless steel air intake/vent connectionsOptional room air Removing from existing ventModel Description Kit Number Air contaminationVent/air termination sidewall If using the alternate sidewall terminationSidewall direct venting Determine location3AClearance to Gravity Air Inlets Prepare wall penetrations Bird Screen TypicalPrepare wall penetrations Alternate Field Supplied Option Multiple vent/air terminationsTermination and fittings Sidewall termination installation Description and usage9Concentric Vent Dimensional Drawing Models 399 11Concentric Vent Sidewall Attachment Multiventing sidewall terminationsVertical direct venting Vent/air termination verticalPrepare roof penetrations 2Vertical Terminations with Multiple BoilersVertical termination installation 4Concentric Vertical TerminationMultiventing vertical terminations Mm see -9,Hydronic piping Hydronic piping Flow switch adjustment Near boiler piping connectionsCirculator sizing 20F 25F 30F 35F Head FeetPressure 399 500 600 700 800Near boiler piping components 7Single Boiler Primary/Secondary Piping Number of Units Model Manifold Pipe Sizes in Inches mm Connecting gas supply piping Gas connectionsNatural gas Propane GasIron Pipe Nominal Natural Gas Pipe Capacity ChartCheck inlet gas supply Length of Pipe in Straight FeetGas valve replacement Gas PressureField wiring Installation must comply withLine voltage connections High gas pressure switch Outdoor temperature sensorAuxiliary device proving switch Low gas pressure switchSystem supply sensor Alarm contactsWiring of the cascade Boiler management system3Low Voltage Field Wiring Connections Condensate disposal Condensate drainCheck/control water chemistry Freeze protection when usedStart-up Fill and test water systemInspect/fill condensate system Check for gas leaksCheck thermostat circuits Inspect/check condensate lines and fittingsIf boiler does not start correctly Final checks before starting the boilerStart the boiler Check system and boilerFor Your Safety Read Before Operating Set space heating operation Natural Gas PropaneConfiguration of the cascade Set domestic hot water DHW operationOperating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if usedCascade DHW, Night Setback, and Ramp Delay operation with Cascade Sequence of the cascadeSequence of operation BLR IgnitionKnight XL control module ShutdownUser Access modesInstaller To save parameters and exit programmingSet Point Met ServiceStandby PrepurgeSYS ***.*F Control will display the actual fan motor RPMDelay 10V in **.VdcOperation of the cascade Maintenance Maintenance and annual startup Service technicianOwner maintenance Clean condensate trap Check all piping for leaks MaintenanceAddress reported problems Inspect boiler areaCheck expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Inspect ignition and flame sense electrodesReview with owner Check flame signalCleaning boiler heat exchanger Model Kit Part Component Number DescriptionDiagrams High Voltage2Ladder Diagram Page Page KBX-I-O Rev H
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399 specifications

Lochinvar 999 - 750, CF-CH(E)-i&s-08,399 is a cutting-edge boiler designed for commercial heating applications. With its robust construction and high efficiency, this model stands out in the crowded market of heating solutions.

One of the main features of the Lochinvar 999 - 750 is its exceptional thermal efficiency rating. The unit incorporates advanced condensing technology that allows it to recover heat from flue gases, which helps in achieving efficiency levels of up to 99%. This efficiency not only reduces energy consumption but also lowers operational costs, making it an excellent investment for businesses looking to minimize their carbon footprint.

The boiler is designed to provide a powerful output of 750 kW, ensuring it meets the heating demands of larger buildings or commercial spaces. Its capacity makes it suitable for a range of applications including schools, hospitals, and industrial facilities. Moreover, the unit features a built-in cascading system that enables multiple boilers to be connected, enhancing system reliability and flexibility.

In terms of technology, the Lochinvar 999 - 750 is equipped with a user-friendly touchscreen interface. This innovative control system allows operators to monitor and adjust settings with ease, providing real-time performance data and alerts for maintenance needs. The intelligent controls optimize operation to match the heating load, further enhancing energy efficiency.

Safety is a top priority with this model. It is built with multiple safety features such as automatic shut-off valves, pressure relief valves, and flame monitoring systems, ensuring safe operation under various conditions. The unit also adheres to stringent industry standards and regulations, making it a reliable choice for commercial applications.

Furthermore, the Lochinvar 999 - 750 is designed with serviceability in mind. Its compact footprint and accessible components simplify maintenance, reducing downtime and associated costs. The unit also supports a variety of fuel sources, including natural gas, propane, and biodiesel, providing flexibility to meet different facility requirements.

In summary, the Lochinvar 999 - 750, CF-CH(E)-i&s-08,399 represents a blend of efficiency, reliability, and safety in commercial heating. Its advanced technologies and thoughtful design make it a powerful solution for various heating needs, making it an ideal choice for businesses aiming for excellence in energy management and operational efficiency.
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