Lochinvar 51 operation manual Sequence of operation, Operation Display

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Installation & Operation Manual

11 Operating information (continued)

Sequence of operation

OPERATION

DISPLAY

 

 

1. Upon a call for heat, the gas pressure switch(es) must be closed.

2. Once the gas pressure switch(es) are closed, the control turns on the appropriate pumps (system and boiler pumps for space

heating, DHW pump for DHW). The flow switch and/or LWCO must close.

3. The control turns on power to

the louver relay.

The louver proving switch, air pressure

switch, and blocked

drain switch must close.

 

4.The control starts a 15 second prepurge cycle by initiating the blower.

5.The control starts a 4 second trial for ignition by firing the spark electrode and opening the gas valve.

6.If flame is not detected within 1 second after the sparking ends, the control will perform a 10 second post-purge, then start another prepurge cycle and try to light the burner again. The control will perform a total of 4 attempts before locking out.

7.If flame is detected, it holds the firing rate steady for 5 seconds to let the flame stabilize, then it begins to modulate the firing rate based on a set point or some other command (such as a 0-10V BMS signal).

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Contents Models 51 Contents Please read before proceeding When servicing boilerStainless steel heat exchanger Knight Wall Mount Boiler How it worksModels 51 Knight Wall Mount Boiler =B=R Rating RatingsCloset and alcove installations Installation must comply withDetermine boiler location Before locating the boiler, check1Closet Installation Minimum Required Clearances Vent and air piping Provide air openings to roomWall 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 to a concrete wall Mounting the boilerMounting to a metal studded wall Mounting to a wood studded wallDirect venting options Sidewall Vent General ventingDirect venting options Vertical Vent, Sidewall Air Direct venting options Vertical VentRequirements for installation in Canada Install vent and combustion air pipingInstalling vent and air piping PVC/CPVC Vent piping materialsAir inlet pipe materials PVC/CPVC air intake/vent connectionsApproved Stainless Steel Vent Manufacturers MakeBoiler Flue Stainless steel ventBoiler Boiler Flue Intake Air AdapterRemoving from existing vent Stainless steel air intake/vent connectionsVent and air system Vent, air piping and terminationModel Kit Number KIT30051 Air contamination Optional room airSidewall direct venting If using the alternate sidewall terminationVent/air termination sidewall Vent Size2AClearance to Gravity Air Inlets Prepare wall penetrations Alternate Field Supplied Option Prepare wall penetrationsTermination and fittings Multiple vent/air terminationsDescription and usage Sidewall termination installationSidewall termination optional concentric vent Sidewall termination optional concentric vent models 8Concentric Vent Dimensional DrawingMultiventing sidewall terminations 10Concentric Vent Sidewall AttachmentVent/air termination vertical Vertical direct venting2Vertical Terminations with Multiple Boilers Prepare roof penetrationsVertical termination optional concentric vent Vertical termination installationMinimum Combustion AIR Typical Multiventing vertical terminationsConcentric Venting Arrangement Alternate vertical concentric ventingAIR Inlet Flue Exhaust Seal CAP Existing Flue Outlet Existing vent as a chaseHydronic piping Near boiler piping components Circulator sizing Near boiler piping connectionsArmstrong ModelMinimum Pipe Pump Size Grundfos Variable speed pump option Variable speed pump setupModel Grundfos UP26-96 FC/VS IFC VS Stratos 1.25 3 x3Single Boiler Single Temperature Zoned with Circulators Number of Units 5Single Boiler Multiple Temperatures Multiple Boilers Multiple Temperatures Model 8Single Boiler Zoned with Valves Model 10Single Boiler Non-Zoned Primary/Secondary Piping Gas connections Connecting gas supply pipingPropane Gas Natural gasLength of Pipe in Straight Feet for 1/2 PSI Natural Gas Pipe Capacity ChartCheck inlet gas supply Gas Pressure Gas valve replacementInstallation must comply with Field wiringLine voltage connections Low voltage connectionsLouver proving switch Outdoor temperature sensorFlow switch ThermostatWiring of the cascade Alarm contactsSystem supply sensor Boiler management systemInstallation Condensate drain Condensate disposalStart-up Freeze protection when usedCheck/control water chemistry Fill and test water systemCheck for gas leaks Check thermostat circuits Clean/Inspect Trap AssemblyInspect/fill condensate system Inspect/check condensate lines and fittingsStart the boiler Final checks before starting the boilerIf boiler does not start correctly Check system and boiler2Operating 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 operationUser Access modesInstaller 1Control Panel Knight wall mount boiler control moduleCall for Heat Information Right Select no Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check all boiler wiring Check ignition ground wiringCheck control settings Check expansion tankCleaning boiler heat exchanger Check flame signalReview with owner Oiled bearing circulatorsPC Interface Diagrams2Wiring Diagram Page Page

51 specifications

Lochinvar 51 is an innovative and robust residential boiler system designed for high-efficiency heating needs. A popular choice among homeowners, the Lochinvar 51 stands out in the market due to its advanced features and eco-friendly technologies.

One of the main features of Lochinvar 51 is its compact design, making it ideal for installation in limited space environments such as attics or closets. Despite its small footprint, it boasts a powerful heating capacity, suitable for varying home sizes. The boiler operates with a modulating gas burner that allows it to adjust its heat output according to the demand, ensuring efficiency and comfort throughout the day.

The Lochinvar 51 employs a cutting-edge heat exchanger made from stainless steel, which is highly durable and resistant to corrosion. This design not only enhances the boiler's performance but also increases its lifespan. The unit offers impressive AFUE (Annual Fuel Utilization Efficiency) ratings, showcasing its capability to convert a significant portion of fuel into usable heat, thus minimizing energy waste and reducing heating costs.

Technologically, the Lochinvar 51 is equipped with advanced control systems that facilitate precise temperature management. The intuitive interface allows homeowners to easily set their desired temperature and monitor the system’s performance. Additionally, the integration of outdoor reset technology helps optimize energy consumption by adjusting the water temperature based on outside weather conditions, leading to further energy savings.

Safety features are also paramount in the Lochinvar 51. It includes built-in safeguards that monitor pressure and temperature, automatically shutting down the system in case of any irregularities. This not only protects the boiler but also ensures peace of mind for users.

Moreover, Lochinvar 51 supports compatibility with smart home systems, providing homeowners with remote control capabilities via mobile devices. This innovative feature enhances user convenience, allowing for easy adjustments and monitoring of the heating system from anywhere.

In conclusion, the Lochinvar 51 is an exceptional choice for homeowners looking for a reliable, efficient, and technologically advanced heating solution. With its impressive heating capacity, durable design, and innovative control features, it sets a high standard in residential boiler performance, making it a top contender in today’s market.
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