Lochinvar WH 55-399 operation manual Access modes, User, Installer

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Installation & Operation Manual

11 Operating information (continued)

 

OPERATION

DISPLAY

8.If the space heating call for heat is active, and the tank thermostat or sensor starts a DHW call for heat, the boiler will switch to the DHW mode. If programmed for normal DHW operation (not as a zone), the DHW pump will turn on first, then the boiler pump will turn off (boiler and DHW pump operation briefly overlap to ensure flow is maintained through the unit). This will divert the boiler’s outlet water from the heating system and send it to the tank coil instead. The control will then modulate to maintain the outlet temperature to the DHW boiler set point.

9.If the boiler is not part of a Cascade, and both the space heating and DHW calls for heat remain active long enough, the boiler will switch back and forth between the two heating modes until one of them is satisfied.

10.Once both calls for heat are satisfied, the control will turn off the burner. The blower will continue to run during the postpurge period.

11.Any pumps that are running will continue to run for their respective pump delay times before turning off, unless programmed to remain on continuously. A 60 second anti-cycle period will start, which will delay any new call for heat until it times out.

12.In Standby, ready to start a new cycle.

Access modes

User

The user can adjust space heating and tank target temperatures by pressing the NAVIGATION dial when “SETPOINTS” is flashing at the bottom of the display. The date and time, and the temperature units can also be changed (see page 63).

Installer

Most parameters are available only to the installer, accessible by entering the installer password, see the Knight Wall Mount Service Manual.

Saving parameters (reference the Parameter Table in the Knight Wall Mount Service Manual)

NOTICE

Please note that the brackets ([]) denote

 

screen status.

 

To save parameters and exit programming:

Press the RIGHT SELECT [SAVE] key and then press the RIGHT SELECT [HOME] key.

To enter a parameter and continue programming:

Press the RIGHT SELECT [SAVE] key 1 time to return to the parameter listings; press again to return to the menu listings. Remember to press the RIGHT SELECT [HOME] key when finished programming in order to save the changes made.

See the Knight Wall Mount Service Manual for a detailed description of parameters and access modes.

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Contents Models WH 55 Contents Please read before proceeding When servicing boilerBoiler operation Boiler waterStainless steel heat exchanger Knight Wall Mount Boiler How it worksModels 55 Knight Wall Mount Boiler Ahri Rating RatingsCloset and alcove installations Installation must comply withDetermine boiler location Before locating the boiler, check1Closet Installation Minimum Required Clearances Vent and air piping PrecautionsWall mounting location Prevent combustion air contaminationWhen 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 Prepare boiler Remove boiler from wood palletGas conversions Mounting to a wood studded wall Mounting the boilerMounting to a concrete wall Mounting to a metal studded wallDirect venting options Sidewall Vent General ventingAir intake/vent connections Install vent and combustion air pipingSizing Requirements for installation in CanadaModel Kit Number Equivalent Vent Length Model Max Vent AirAir inlet pipe materials MaterialsAir contamination Optional room airMaterial Standard Approved PVC/CPVC Vent Pipe and FittingsVent pipe Vent fittingsModel PolypropyleneCentrotherm InnoFlue SW Duravent Polypro Stainless steel vent Sidewall direct venting If using the alternate sidewall terminationVent/air termination sidewall Determine location2AClearance to Gravity Air Inlets Prepare wall penetrations Model Air Vent Centerline WidthMultiple vent/air terminations Prepare wall penetrations Alternate Field Supplied OptionSidewall termination installation Sidewall termination optional concentric ventDescription and usage Sidewall termination optional concentric vent models 92 and 3 Concentric Vent Dimensional Drawing reference D onMultiventing sidewall terminations 12Concentric Vent Sidewall AttachmentVertical direct venting Vent/air termination verticalPrepare roof penetrations Vertical termination optional concentric vent Vertical termination installationMinimum Combustion AIR Typical Multiventing vertical terminationsVent / Air Inlet Size Minimum Existing Vent / Chase Size Alternate vertical concentric ventingConcentric Venting Arrangement Existing vent as a chaseSystem water piping methods General piping information Hydronic pipingLow water cutoff device Chilled water systemNear boiler piping components Circulator sizing Near boiler piping connections25F Temperature Rise Applications 20F Temperature Rise Applications35F Temperature Rise Applications Pump Size GrundfosSmart System / Multi-temperature loop control option Variable speed pump setupVariable speed pump option 3Single Boiler Primary / Secondary Piping Make UP Water Indirect Number of Units Boiler Member 8Single Boiler Multiple Temperature DHW Priority Model Required Pipe Sizes Boiler Make UP Boiler Gas connections Connecting gas supply pipingPropane Gas Natural gasNatural Gas Pipe Capacity Chart Check inlet gas supplyLength of Pipe in Straight Feet for 1/2 PSI Gas Pressure Gas valve replacementField wiring Installation must comply with Low voltage connectionsLine voltage connections Louver proving switch Outdoor temperature sensorFlow switch ThermostatWiring of the cascade Alarm contactsSystem supply sensor Boiler management systemFieldwiring InstallationCondensate drain Condensate disposalStart-up Freeze protection when usedCheck/control water chemistry Fill and test water systemCheck for gas leaks Inspect/fill condensate system Clean/Inspect Trap AssemblyCheck thermostat circuits Inspect/check condensate lines and fittingsStart the boiler Final checks before starting the boilerIf boiler does not start correctly Check system and boiler2Operating Instructions Models 55 Operating Instructions Model Natural Gas Propane Set space heating operationVerify DHW mode Configuration of the cascadeSet domestic hot water DHW operation General Operating informationProtection features Boiler temperature regulation Cascade Outdoor reset operation, if usedOperation Display Sequence of operationAccess modes InstallerUser 1Control Panel Knight wall mount boiler control moduleCall for Heat Information Dial Function Service technician Maintenance Maintenance and annual startupOwner maintenance See the following pages for instructions GeneralMaintenance Check all boiler wiring Check ignition ground wiringCheck control settings Flue vent system and air pipingCleaning boiler heat exchanger Check flame signalPerform start-up and checks Check burner flamePC Interface Diagrams2Wiring Diagram

WH 55-399 specifications

The Lochinvar WH 55-399 is a high-efficiency water heater designed for residential and commercial applications, offering a reliable solution for hot water needs. This model represents an advanced approach to water heating, combining cutting-edge technologies and features that ensure optimal performance and energy efficiency.

One of the standout features of the Lochinvar WH 55-399 is its high thermal efficiency, which is a key factor in reducing energy consumption and operating costs. With an efficiency rating exceeding 90%, this water heater ensures that more energy is converted into usable hot water, making it an environmentally friendly choice.

The WH 55-399 utilizes advanced condensing technology, which allows it to extract additional heat from the exhaust gases before they are expelled. This process not only increases efficiency but also significantly decreases greenhouse gas emissions. The unit is also equipped with an intelligent control system that allows for precise temperature adjustments, ensuring that the user has an optimal supply of hot water while maintaining energy savings.

Another important aspect of this model is its impressive recovery rate. The ability to quickly heat water after a significant draw ensures that users will not experience interruptions in their hot water supply, making it ideal for busy households or commercial environments. This is particularly beneficial in applications requiring consistent hot water availability, such as restaurants or athletic facilities.

The Lochinvar WH 55-399 is designed with durability in mind. Constructed from high-quality materials, this water heater boasts a robust tank lined with corrosion-resistant coatings, extending the lifespan of the unit and reducing maintenance needs. Additionally, it features a reliable gas burner and a well-insulated tank, contributing to its overall efficiency and performance.

Safety is also a priority with the WH 55-399. The unit incorporates multiple safety features, including a flame sensor, automatic shut-off valve, and over-temperature protection, ensuring peace of mind for users.

In summary, the Lochinvar WH 55-399 stands out with its combination of high efficiency, advanced technology, and durable construction. Whether for residential or commercial use, this water heater provides a dependable and cost-effective solution for all hot water needs. Its innovative design and performance characteristics make it a top choice for anyone seeking a premium water heating option.
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