Lochinvar 402 - 2072 operation manual 6Primary/Secondary Piping with Buffer Tank

Page 42

Installation & Operation Manual

4 Water connections

Figure 4-6_Primary/Secondary Piping with Buffer Tank

COMMON MANIFOLD SIZE (Min.)

Models: 402, 502, 652, & 752

Number of Units

GPM

Diameter

(in.)

 

 

2

110

3

3

165

3 1/2

 

 

 

4

220

4

 

 

 

5

275

5

6

330

5

7

385

6

 

 

 

8

440

6

 

 

 

1" TEMPERATURE

AND PRESSURE GAUGE

AUTOMATIC AIR ELIMINATOR/VENT

SYSTEM

OUTLET

SYSTEM

SENSOR

LOCATION

SYSTEM

INLET

COMMON MANIFOLD SIZE (Min.) Models: 992, 1262, 1442, 1802 & 2072

Number of Units

GPM

Diameter

(in.)

 

 

2

180

4

3

270

5

 

 

 

4

360

6

 

 

 

5

450

6

6

540

6

 

 

 

7

630

7

 

 

 

8

720

7

PUMP

COMMOM MANIFOLD

MUST BE SIZED TO

ACCOMODATE COMBINED

FLOW RATE FOR

ALL BOILERS

BUFFER

 

 

 

DRAIN

 

 

TANK

 

 

 

 

NOTICE

NOTICE

The Inlet/Outlet System tappings are shown in the optional location on the side of the tank for pictorial purposes. The standard location for the system tappings is 180° from the recirculation tappings.

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.

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Contents Models 402 Save this manual for future referenceContents Please read before proceeding Special instructionsRemoval of Combustion Chamber Lining or Base Panels Safety information Owner warningCopper-fin II How it works Copper-fin II How it works Copper-fin II How it works Ratings Copper-fin =B=R RatingIndoor clearances from combustible construction Determine unit locationLocation of unit Freeze protectionHydronic systems anti-freeze Outdoor boiler installationLocation Combustion and ventilation airOutside Combustion Air Using Direct Venting Minimum Recommended Combustion AIR Supply to Equipment RoomExhaust fans Combustion air filterCAT IV Flue pipe materials VentingIdentify your appliance’s vent system CAT I Negative pressure non-condensingDirect Vent see General information Venting supportBarometric damper location Flue outlet piping Conventional negative draft venting seeNegative draft Common Venting SystemsMasonry chimney installations Vertical vent termination clearances and locationInspection of a masonry chimney 1Vent Termination from Peaked Roof 10 ft. or Less From Ridge Length of air inlet pipe Vertical DirectAire venting seeCombustion air inlet piping Sidewall air inletVertical Rooftop Air Inlet Combined air inlet pointsClearances Venting of flue products Directaire Kits Model Horizontal KIT Vertical KITSidewall venting termination Sidewall venting seeSidewall with fan Sidewall vent termination clearances and locationDrain tee installation Sidewall venting without fanModels 402 Horizontal DirectAire venting Powered Venting see Venting of flue productsDirect venting see Flue outlet pipingVertical DV venting termination Horizontal Vent Termination Clearances and Location Masonry chimney installationHorizontal DV venting termination Combustion air inlet pipingLength of air inlet pipe Connecting the air inlet pipe to the unitAir inlet piping materials Sealing PVC, CPVC, ABS, dryer vent, and flex duct vent pipeHorizontal combustion air inlet clearances Multiple sidewall direct vent installationsVertical and sidewall combustion air inlet Vertical Combustion Air Inlet ClearancesOutdoor installation see Outdoor vent/air inlet locationOutdoor vent cap kit Gas pressure test Connecting to gas supplyGas connections Gas connectionCombination gas valves Gas train and controlsVenting of combination gas valves GAS Piping Size Chart Checking gas supply pressureInlet and outlet connections Water flow switchWater connections Heat exchangerPiping of the boiler system Heating boiler installationsRelief valve Water connections heating boilers onlyLow temperature bypass requirements Minimum boiler water temperaturesLow Temperature Return Water Systems LTV Valve Kits Model LTV Valve KITRadiant floor and snow melt heating systems Low system water volumeThree way valves in system Maximum Flow for Heating BoilerInstallation with a chilled water system Temperature / pressure gaugeTypical heating boiler installations DHW installationGPM Diameter4Primary/Secondary Piping of Multiple Boilers Floor Drain Heating Supply Loop 6Primary/Secondary Piping with Buffer Tank Boiler operating control module Installation must comply withElectrical connections AMP Draw DataLow voltage connections Line voltage connectionsEMS or remote thermostat connection DHW Domestic Hot Water thermostatLouver relay Louver proving switchAlarm contacts System supply sensor recommended useWiring of the cascade 4Low Voltage Field Wiring ConnectionsStart-up Placing the boiler in operation Check thermostat circuitsCheck vent and air piping Start the boiler1Lighting Instructions Configuration of the cascade Set DHW operationSet clock How the appliance operates Operating informationGeneral How the control module operatesTemperature control Protection featuresBoiler temperature regulation Outdoor reset operation, if used boilers onlyCascade DHW, Night Setback, and Ramp Delay operation with cascade DAY Switching on SequenceSequence of the cascade Sequence of operation Operation DisplayMENU/EXIT Display Screen ENTER/RESET Updown Copper-fin II control moduleUser Access modesInstaller To save parameters and exit programmingStatus display screens Inlet Shorted Inlet ***FInlet Open Syssup ***FSTG Demand Unit Pump DelayDHW Pump Delay FAN SpeedOperation of the cascade MIX VAL POS ** %Domestic water heaters Temperature Rise AT Full Rate Fire 90 GPM FlowModel Temperature Rise F Maximum Water FlowWater chemistry 1Typical Water Heater Piping with Storage Tank 2Single Water Heater Piping with Two Storage Tanks 3Multiple Water Heater Piping with a Single Storage Tank 4Multiple Water Heater Piping with Multiple Storage Tanks Minimum Pump Performance Pump operationHeat exchanger Ft. HdThermostat adjustment procedure Minimum water temperatures domestic hot water useDomestic water temperatures Cathodic protection Optional relief valveThermal expansion Location of Cold Water Supply Piping ConnectionsMaintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Check relief valve Inspect/replace hot surface igniter Check all wiringCheck control settings Ignition system checkoutCheck burner flame Inspect and clean burnerPerform start-up and checks Check flue gas passagewaysInspect and clean the heat exchanger Review with ownerOiled bearing circulators Connection diagram Digital HarnessSplay Diagram LadderFlow Switch
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402 - 2072 specifications

The Lochinvar 402 - 2072 is a versatile and highly efficient boiler designed to meet the heating demands of modern residential and commercial applications. This model stands out due to its innovative technologies, advanced features, and a high level of reliability, making it an ideal choice for consumers looking for an enduring and economical heating solution.

One of the primary characteristics of the Lochinvar 402 - 2072 is its impressive energy efficiency. With an exceptional annual fuel utilization efficiency (AFUE) rating, this boiler ensures minimal energy waste, allowing homeowners and business operators to save significantly on their energy bills. The model incorporates advanced condensing technology that enables it to extract heat from the combustion gases, maximizing heat transfer and reducing emissions.

The Lochinvar 402 - 2072 is built with a robust stainless steel construction that enhances durability and resilience against corrosion and other environmental factors. This material not only prolongs the lifespan of the unit but also contributes to its outstanding thermal efficiency. Additionally, the boiler's compact design allows for flexible installation options, making it suitable for various spaces, including tight utility rooms and basements.

Equipped with a user-friendly control interface, the Lochinvar 402 - 2072 allows for easy monitoring and adjustment of settings. Its advanced digital display provides real-time data on system performance, ensuring the operator can maintain optimal performance and efficiency.

Another noteworthy feature is the unit's quiet operation. The design includes sound-dampening insulation and high-efficiency circulators, keeping noise to a minimum, which is an essential trait for both residential and commercial settings.

The Lochinvar 402 - 2072 is also designed with safety in mind. It incorporates multiple safety features including an automated vent damper, low water cutoff, and a comprehensive control system that monitors various operating conditions. This proactive approach to safety ensures that potential issues are identified and addressed before they become critical.

In conclusion, the Lochinvar 402 - 2072 boiler presents an exceptional combination of efficiency, durability, and user-friendly features. Its advanced condensing technology, stainless steel construction, and focus on safety make it a leading choice in the competitive boiler market, catering to the heating needs of a diverse range of applications while ensuring environmental responsibility. For those in search of a dependable and efficient heating solution, the Lochinvar 402 - 2072 is certainly worth considering.
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