Lochinvar 000 Btu/hr PRIMARY/SECONDARY Boiler Piping, Primary/Secondary Piping of a Single Boiler

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PRIMARY/SECONDARY

BOILER PIPING

The installer must ensure that the boiler has adequate flow without excessive temperature rise. The temperature rise on a multiple zone system should be made when only the zone with the longest length and/or highest head loss is open. Low system flow can result in overheating of the boiler water which can cause short burner on cycles, system noise and in extreme cases, a knocking flash to steam. These conditions indicate the need to open the bypass adjustment valve, installation of a larger circulator pump or installation of the boiler with a primary/secondary piping system. System noise may also indicate an oversized boiler.

￿CAUTION

At no time should the system pressure be less than

12 PSIG.

FIG. 43 Primary/Secondary Piping of a Single Boiler

Heating boilers with inputs of 315,000 - 500,000 Btu/hr or larger installed on multiple zone systems are recom- mended to be installed with a primary/secondary piping system as shown in Figure 43. A primary/secondary piping system may also be installed on smaller input boilers to ensure proper boiler flow rates. Primary/sec- ondary piping is also ideal for systems using a mixture of propylene glycol and water. A primary/secondary piping system uses a dedicated pump to supply flow to the boiler only. This pump is sized based on desired boiler flow rate, boiler head loss and head loss in the secondary system piping only. The secondary pump, installed in the boiler piping, ensures a constant water flow rate to the boiler for proper operation. Boiler installation with a primary/secondary piping system can prevent noise problems caused by low system water flows. A primary/secondary piping system is recommended on any boiler where low water flow conditions may present an operational problem.

A primary/secondary piping system is ideal for systems filled with a propylene glycol and water mixture. A glycol and water mixture is more dense than water only and may result in a lower boiler flow rate. A lower boiler flow may cause noise on operation or short cycling of the burners. A larger secondary pump may be used on a primary/secondary system to provide an increased boiler flow rate. A glycol and water system may require from 10 to 20% more flow to compensate for the increased density of the glycol and its effect on the heat transfer process in the boiler. The exact increase in flow that may be required is based on the type and percentage of glycol added to the boiler system. Consult the manufacturer of the glycol for additional recommendations when using a glycol and water fill for your boiler system.

MAKE-UP

WATER

PRV

EXPANSION TANK

TO SYSTEM

LWCO (OPTIONAL)

SYSTEM

PUMP

 

BYPASS

SECONDARY

12"

BOILER PUMP

 

AIR SEPARATOR

FROM

SYSTEM

FIG. 44 Boiler with Low Temperature Bypass Piping - Models 315,000 - 500,000 Btu/hr

A boiler operated with an inlet temperature of less than 140°F (60°C) must have a bypass to prevent problems with condensation. A bypass as shown in Figure 44 must be piped into the system at the time of installation.

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Contents Special Instructions to Owner WarrantyChecking Equipment Contents User Warning Codes Installation ProcedureLocation of Unit Clearance from Combustible Construction Clearances from Combustible ConstructionCombustion Air Through Ducts Table a Minimum Recommended Combustion AIR Supply OpeningsTable B Vent Pipe Sizes VentingConventional Negative Draft Venting System Input Btu/hr Flue SizePage Venting Termination Vent Termination from Peaked Roof 10’ or Less from RidgeSidewall Venting Masonry Chimney Installation Inspection of a Masonry ChimneyAutomatic Vent Damper Vent Damper and Vent Damper Terminal BlockGAS Connection GAS Supply GAS Pressure TestTable C Table D Manifold PressureTable G GAS Connections Table F Fittings to Equivalent Straight PipeBtu/hr Distance from Meter In Feet Install Piping to Control GAS PipingGAS Manifold Pressure Adjustment Procedure WrenchChecking GAS Supply Pressure PilotCombination GAS Valves Venting of Combination Gas ValvesRelief Valve Water Flow Switch if Equipped Relief Valve Water HeaterTWO Stage Burner Control System Minimum Flow Rate Required to Actuate Flow SwitchLOW Water Cutoff if Equipped Table J AMP Draw DataOperating Temperature Control Temperature AdjustmentTemperature Control Settings Locating Temperature ControlWiring of Remote Sensors Temperature Control SensorsInstallation of Remote Sensors High-Fire OffsetOutdoor AIR Reset Option Additional Temperature ControlsManual Reset High Water Temperature Limit Blocked Vent and Flame ROLL-OUT/FLAME Interlock SwitchInitial START-UP Lighting Instructions for Standing Pilot Models F1 PRE-START ChecklistInput for Your Safety Read Before Operating What to do if YOU Smell GASLighting Wand To Turn OFF GAS to Appliance Safety Shutoff Test for Standing Pilot Ignition SystemLighting Instructions for Spark Ignition Pilot Models F9/M9 Safety Shutoff Test for Spark Ignition Pilot System Operating Instructions To Turn OFF GAS to ApplianceFreeze Protection for a Heating Intermittent Pilot Spark Ignition System F9/M9Freeze Protection F9/M9 Intermittent Spark Ignition Pilot ModelsMaintenance Water TreatmentInspection Cleaning Procedure Removal of Combustion Chamber Lining or Base PanelsOuter Air Deflector and HEX Filler Bracket Piping of the Boiler System GAS Train and ControlsWater Connections Heating Boilers only Circulator Pump RequirementsTable L Circulator Pump SpecificationsCirculator Pump Operation PRIMARY/SECONDARY Boiler Piping Primary/Secondary Piping of a Single BoilerThree WAY Valves LOW Temperature Bypass RequirementsBoiler Flow Rates Table M Minimum Required Flow for Heating Boiler General Plumbing RulesInstallation with a Chilled Water System Table NTable O Terminal Strip Wiring Boiler Operating Temperature ControlPower Venter Connection To Terminal Strip Wire GaugeWater Velocity Control Required Temperature RiseTable P Required Temperature Rise Btu/hr To 7 Grains To 25 Grains HardnessSoftened Water Systems Water ChemistryPump Operation Minimum Pump Performance Remote Sensor Installation InstructionsThermostat Settings Heat ExchangerAutomatic Vent Dampers Optional Relief ValveCathodic Protection Thermal ExpansionDo not plug or cap the relief valve discharge Troubleshooting Guide 90,000 270,000 Btu/hr Models Water Heaters F1 Schematic Diagram F1 Unit Schematic Diagram F9 Unit Schematic Diagram M9 Unit Schematic Diagram F9/M9 Unit Page
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000 Btu/hr, 000 - 500, RSB-i&s-05, 45, CP-5M-4/08 specifications

The Lochinvar 000 BTU/hr, 45,000 - 260 is a high-efficiency water heater designed for residential and commercial applications, showcasing advanced technologies that set it apart in the industry. With a powerful heating capacity of up to 260,000 BTU/hr, this unit is engineered to meet the varying demands of hot water for both large households and businesses.

One of the standout features of the Lochinvar 000 is its innovative design that maximizes energy efficiency. Utilizing condensing technology, this water heater captures and reuses exhaust gases that would otherwise be lost, thereby improving thermal efficiency significantly. The result is an impressive Energy Factor (EF) rating that not only promotes sustainability but also translates into lower energy bills for the end user.

The unit is equipped with a user-friendly digital control interface that simplifies operation and monitoring. This control system allows for precise temperature adjustments, ensuring that users can maintain their desired water temperatures effortlessly. Additionally, the advanced diagnostics provided by the control system help in troubleshooting potential issues before they develop into more significant problems, enhancing the reliability of the unit.

Durability is another hallmark of the Lochinvar 000. Constructed with high-quality materials, including a robust stainless-steel tank, this water heater is designed to withstand the rigors of daily use. The stainless-steel construction also helps to resist corrosion, which is a common issue in water heaters, thereby extending the lifespan of the unit.

Furthermore, Lochinvar has integrated safety features into the design of the 000 model, including an automatic shut-off system and advanced flame safeguard controls to prevent hazardous situations. This focus on safety ensures peace of mind for users, making it an ideal choice for family homes and workplaces alike.

In terms of installation, the Lochinvar 000 is relatively straightforward, with options for both indoor and outdoor setups. The compact design allows for flexible installation, accommodating various space requirements without compromising performance.

Overall, the Lochinvar 000 BTU/hr, 45,000 - 260 combines reliability, efficiency, and advanced technology, making it a superior choice for those seeking a powerful and dependable water heating solution. This water heater not only meets but exceeds modern expectations for performance and safety, catering to a wide range of hot water needs.
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