Lochinvar WH 55-399 operation manual

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Revision A (ECO #C06854) initial release.

Revision B (ECO #C08222) reflects the changes to the water pipe clearances from 1" to a 1/4" (ECR #R04077), pages 7, 8, and 33 and changes made to the service clearances (left side) from 24" to 12" (ECR R04002).

Revision C (ECO #C08645) reflects additional cleaning and inspection instructions for the condensate trap (page 75).

Revision D (ECO #C09197) reflects additional information added to the humidity warning on page 7, along with updates made to the SMART SYSTEM control (ECR #R04523).

Revision E (ECO #C09803) reflects the addition of the new Polypropylene Vent material section, rearranging the venting section, and the addition of the AHRI and ASME logos (R05009).

Revision F (ECO #C09843) reflects the addition of the manual air vent in the outlet tubing and the new condensate trap pipe (R04984).

Revision G (ECO C10297) reflects the addition of the venting notice on page 16 and updates made to the ignition timing information.

Revision H (ECO C10450) reflects changes made to Table 10A on page 62.

WH-I-O Rev H 05/12

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Contents Models WH 55 Contents When servicing boiler Please read before proceedingBoiler operation Boiler waterKnight Wall Mount Boiler How it works Stainless steel heat exchangerModels 55 Ratings Knight Wall Mount Boiler Ahri RatingInstallation must comply with Closet and alcove installationsDetermine boiler location Before locating the boiler, check1Closet Installation Minimum Required Clearances Precautions Vent and air pipingWall mounting location Prevent combustion air contaminationAreas 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 Gas conversions Prepare boilerRemove boiler from wood pallet Mounting the boiler Mounting to a wood studded wallMounting to a concrete wall Mounting to a metal studded wallGeneral venting Direct venting options Sidewall VentInstall vent and combustion air piping Air intake/vent connectionsRequirements for installation in Canada SizingModel Kit Number Equivalent Vent Length Model Max Vent AirMaterials Air inlet pipe materialsOptional room air Air contaminationApproved PVC/CPVC Vent Pipe and Fittings Material StandardVent pipe Vent fittingsCentrotherm InnoFlue SW Duravent Polypro ModelPolypropylene Stainless steel vent If using the alternate sidewall termination Sidewall direct ventingVent/air termination sidewall Determine location2AClearance to Gravity Air Inlets Model Air Vent Centerline Width Prepare wall penetrationsPrepare wall penetrations Alternate Field Supplied Option Multiple vent/air terminationsDescription and usage Sidewall termination installationSidewall termination optional concentric vent 92 and 3 Concentric Vent Dimensional Drawing reference D on Sidewall termination optional concentric vent models12Concentric Vent Sidewall Attachment Multiventing sidewall terminationsPrepare roof penetrations Vertical direct ventingVent/air termination vertical Vertical termination installation Vertical termination optional concentric ventMultiventing vertical terminations Minimum Combustion AIR TypicalAlternate vertical concentric venting Vent / Air Inlet Size Minimum Existing Vent / Chase SizeConcentric Venting Arrangement Existing vent as a chaseHydronic piping System water piping methods General piping informationLow water cutoff device Chilled water systemNear boiler piping components Near boiler piping connections Circulator sizing20F Temperature Rise Applications 25F Temperature Rise Applications35F Temperature Rise Applications Pump Size GrundfosVariable speed pump option Smart System / Multi-temperature loop control optionVariable speed pump setup 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 Connecting gas supply piping Gas connectionsNatural gas Propane GasLength of Pipe in Straight Feet for 1/2 PSI Natural Gas Pipe Capacity ChartCheck inlet gas supply Gas valve replacement Gas PressureLine voltage connections Field wiringInstallation must comply with Low voltage connections Outdoor temperature sensor Louver proving switchFlow switch ThermostatAlarm contacts Wiring of the cascadeSystem supply sensor Boiler management systemInstallation FieldwiringCondensate disposal Condensate drainFreeze protection when used Start-upCheck/control water chemistry Fill and test water systemClean/Inspect Trap Assembly Check for gas leaks Inspect/fill condensate systemCheck thermostat circuits Inspect/check condensate lines and fittingsFinal checks before starting the boiler Start the boilerIf boiler does not start correctly Check system and boiler2Operating Instructions Models 55 Operating Instructions Model 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 DisplayUser Access modesInstaller Knight wall mount boiler control module 1Control PanelCall for Heat Information Dial Function Maintenance Maintenance and annual startup Service technicianOwner maintenance See the following pages for instructions GeneralMaintenance Check ignition ground wiring Check all boiler wiringCheck control settings Flue vent system and air pipingCheck flame signal Cleaning boiler heat exchangerPerform start-up and checks Check burner flameDiagrams PC Interface2Wiring 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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