Lochinvar 402 - 2072 operation manual 4Primary/Secondary Piping of Multiple Boilers

Page 40

Installation & Service Manual

4 Water connections

Figure 4-4_Primary/Secondary Piping of Multiple Boilers

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

PRESSURE

RELIEF

VALVE

MAKE-UP

WATER

AIR

SEPARATOR

12" OR 4X PIPE DIAMETERS

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

8

8

720

8

 

 

 

EXPANSION

TANK

LOW WATER CUT-OFF (OPTIONAL)

TO SYSTEM

SYSTEM

PUMP

FROM SYSTEM

NOTICE

SECONDARY

BOILER

PUMP

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 Special instructions Please read before proceedingRemoval 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 RatingDetermine unit location Location of unitIndoor clearances from combustible construction Freeze protectionOutdoor boiler installation LocationHydronic systems anti-freeze Combustion and ventilation airOutside Combustion Air Using Direct Venting Minimum Recommended Combustion AIR Supply to Equipment RoomExhaust fans Combustion air filterVenting Identify your appliance’s vent systemCAT IV Flue pipe materials CAT I Negative pressure non-condensingDirect Vent see Venting support General informationBarometric damper location Conventional negative draft venting see Negative draftFlue outlet piping Common Venting SystemsVertical vent termination clearances and location Masonry chimney installationsInspection of a masonry chimney 1Vent Termination from Peaked Roof 10 ft. or Less From Ridge Vertical DirectAire venting see Combustion air inlet pipingLength of air inlet pipe Sidewall air inletCombined air inlet points Vertical Rooftop Air InletClearances Venting of flue products Directaire Kits Model Horizontal KIT Vertical KITSidewall venting see Sidewall with fanSidewall venting termination Sidewall vent termination clearances and locationDrain tee installation Sidewall venting without fanModels 402 Horizontal DirectAire venting Powered Venting see Venting of flue productsFlue outlet piping Direct venting seeVertical DV venting termination Masonry chimney installation Horizontal DV venting terminationHorizontal Vent Termination Clearances and Location Combustion air inlet pipingConnecting the air inlet pipe to the unit Air inlet piping materialsLength of air inlet pipe Sealing PVC, CPVC, ABS, dryer vent, and flex duct vent pipeMultiple sidewall direct vent installations Vertical and sidewall combustion air inletHorizontal combustion air inlet clearances Vertical Combustion Air Inlet ClearancesOutdoor vent/air inlet location Outdoor installation seeOutdoor vent cap kit Connecting to gas supply Gas connectionsGas pressure test Gas connectionGas train and controls Combination gas valvesVenting of combination gas valves GAS Piping Size Chart Checking gas supply pressureWater flow switch Water connectionsInlet and outlet connections Heat exchangerHeating boiler installations Relief valvePiping of the boiler system Water connections heating boilers onlyMinimum boiler water temperatures Low Temperature Return Water SystemsLow temperature bypass requirements LTV Valve Kits Model LTV Valve KITLow system water volume Three way valves in systemRadiant floor and snow melt heating systems Maximum Flow for Heating BoilerTemperature / pressure gauge Typical heating boiler installationsInstallation with a chilled water system DHW installationGPM Diameter4Primary/Secondary Piping of Multiple Boilers Floor Drain Heating Supply Loop 6Primary/Secondary Piping with Buffer Tank Installation must comply with Electrical connectionsBoiler operating control module AMP Draw DataLine voltage connections EMS or remote thermostat connectionLow voltage connections DHW Domestic Hot Water thermostatLouver proving switch Alarm contactsLouver relay System supply sensor recommended useWiring of the cascade 4Low Voltage Field Wiring ConnectionsStart-up Check thermostat circuits Check vent and air pipingPlacing the boiler in operation Start the boiler1Lighting Instructions Set DHW operation Configuration of the cascadeSet clock Operating information GeneralHow the appliance operates How the control module operatesTemperature control Protection featuresOutdoor reset operation, if used boilers only Boiler temperature regulationCascade DAY Switching on Sequence DHW, Night Setback, and Ramp Delay operation with cascadeSequence of the cascade Sequence of operation Operation DisplayMENU/EXIT Display Screen ENTER/RESET Updown Copper-fin II control moduleAccess modes InstallerUser To save parameters and exit programmingStatus display screens Inlet ***F Inlet OpenInlet Shorted Syssup ***FUnit Pump Delay DHW Pump DelaySTG Demand FAN SpeedOperation of the cascade MIX VAL POS ** %Temperature Rise AT Full Rate Fire 90 GPM Flow Model Temperature Rise FDomestic water heaters 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 Pump operation Heat exchangerMinimum Pump Performance Ft. HdMinimum water temperatures domestic hot water use Thermostat adjustment procedureDomestic water temperatures Optional relief valve Thermal expansionCathodic protection Location of Cold Water Supply Piping ConnectionsService technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Check all wiring Check control settingsCheck relief valve Inspect/replace hot surface igniter Ignition system checkoutInspect and clean burner Perform start-up and checksCheck burner flame Check flue gas passagewaysReview with owner Inspect and clean the heat exchangerOiled 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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