Lochinvar 2.5, 3.5 service manual AIR Seperator Drain Port Typical System Supply Sensor

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Installation & Operation Manual

5 Hydronic piping

Figure 5-5Multiple Boilers - Alternate - Common Header - Fixed or Variable Flow Primary

RELIEF

VALVE (TYPICAL)

BALL VALVE (TYPICAL)

FROM SYSTEM

BOILER DRAIN (TYPICAL)

SYSTEM RETURN

SENSOR

AIR SEPERATOR

DRAIN PORT (TYPICAL)

SYSTEM SUPPLY

SENSOR

SYSTEM

CIRCULATOR

Y-STRAINER (RECOMMENDED)

(TYPICAL)

EXPANSION

TANK PRESSURE

GAUGE

TO SYSTEM

MAKE UP

BACK FLOWWATER PREVENTER

PRESSURE

REDUCING VALVE

NOTICE

NOTICE

Please note that these illustrations are meant to show system piping concept only, the installer is responsible for all equipment and detailing required by local codes.

When installing multiple Crest boilers in fixed or variable flow primary applications, utilize a reverse-return or other piping method to ensure balanced flow through each boiler.

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Contents Save this manual for future reference Contents When servicing boiler Please read before proceedingCrest How it works BlowersCrest How it works Models 1.5 2.0 2.5 3.0 Ratings Crest Ahri RatingDetermine boiler location Installation must comply withRecommended clearances for service access Before locating the boiler, checkVent and air piping Provide air openings to roomFlooring and foundation 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 Remove boiler from wood pallet 7Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room General venting Direct ventingOptional room air Install vent and combustion air piping Air inlet pipe materialsApproved Stainless Steel Vent Manufacturers Make Model Air intake/vent connectionsRemoving from existing vent Common venting Determine location Vertical direct ventingVent/air termination vertical Prepare roof penetrationsMultiple vent/air terminations 4Alternate Vertical Terminations with Multiple BoilersSidewall direct venting Vent/air termination sidewallPrepare wall penetrations 2Clearance to Doors and WindowsRoom air 4Multiple Vent Terminations must also comply with FigureHydronic piping Circulator sizing Model20F 40F 60F Near boiler piping components Ball Valve Multiple Boilers Common Header Primary / Secondary Flow For all equipment and detailing required by local codes AIR Seperator Drain Port Typical System Supply Sensor Connecting gas supply piping Gas connectionsModel Gas Inlet Size Natural gas Propane GasGAS Piping Size Chart Check inlet gas supplyGas valve replacement Gas PressureField wiring Installation must comply withLine voltage connections Louver proving switch EnableOutdoor temperature sensor Low voltage connectionsWiring of the cascade Auxiliary switch 1Alarm contacts System supply sensorWiring FieldCondensate disposal Condensate drainCheck/control water chemistry Freeze protection when usedStart-up Fill and test water systemInspect 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 Gas Natural Gas Propane ValveVerify HWG circulator mode Set HWG target temperature Configuration of the cascadeSet clock Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if usedCascade Sequence of operation Crest control module Home Screen2Main Menu Screen Owner maintenance Maintenance Maintenance and annual startupService technician See the Crest User’s Information Manual for InstructionsMaintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Check flame signalHandling ceramic fiber materials Cleaning boiler heat exchangerReview with owner Niosh stated First AidDiagrams Integrated Control2Wiring Diagram
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3, 2, 3.5, 2.5 specifications

The Lochinvar 2, 3, 3.5, and 2.5 models are a standout lineup in the realm of commercial and residential water heating solutions. Known for their advanced technology and high efficiency, these units cater to a wide range of applications, ensuring optimal performance and reliability.

One of the key features of the Lochinvar models is their robust construction. Each unit is designed to withstand rigorous operational demands while providing excellent thermal efficiency. They are equipped with stainless steel heat exchangers, which offer superior resistance to corrosion and extend the lifespan of the equipment. This durability is essential for both commercial and residential settings where demand can vary significantly.

The Lochinvar 2, 3, 3.5, and 2.5 models utilize innovative control systems that enhance their operational efficiency and user convenience. The built-in Smart Control technology allows for easy monitoring and adjusting of system parameters, ensuring that users can maintain optimal performance with minimal effort. This feature is especially beneficial in commercial settings where large volumes of hot water are required, as it enables users to effectively manage their energy consumption.

Energy efficiency is another hallmark of the Lochinvar lineup. With high-efficiency ratings, these models help reduce energy costs significantly, making them an environmentally friendly option for heating water. The use of advanced combustion technology ensures that these units can deliver maximum heat output with minimal fuel consumption.

Additionally, the Lochinvar models are designed with safety and reliability in mind. They feature multiple safety controls and diagnostics that alert users to potential issues before they escalate, providing peace of mind. The integration of advanced venting options allows for flexible installation configurations, accommodating various building layouts and space requirements.

In summary, the Lochinvar 2, 3, 3.5, and 2.5 models define modern water heating technology with their combination of durability, efficiency, and advanced features. With their innovative design and user-friendly controls, they meet the demanding needs of both commercial and residential users, making them a top choice in the water heater market. Whether for new installations or replacements, these units deliver reliable performance and value.
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