Lochinvar 402 - 2072 Sidewall venting see, Sidewall with fan, Sidewall venting termination

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Installation & Operation Manual

2 Venting

Sidewall venting - see page 14.

C

NOTICE

Before installing a venting system, follow all requirements found in the General Venting

section.

This option uses a powered vent assembly which pulls the flue products out of the stack. This fan generates a negative draft at the unit. Combustion air is drawn from the equipment room (see Combustion and Ventilation Air on 10).

Sidewall with fan

The sidewall fan can be mounted on the inside/outside (depending upon model) with a sidewall vent hood installed on the exterior wall. The sidewall fan and accessories are included in a venting kit provided by the appliance manufacturer. See Table 2C on page 24 for kit numbers.

The venting kit includes the sidewall fan, vent hood, tapered vent adapter, barometric damper (992 - 2072 Models), proving switch and all necessary relays to interlock with the heaters control system. The tapered vent adapter reduces the vent size at the inlet to the fan. There should be no reduction in vent diameter from the unit’s flue outlet to the sidewall fan. The barometric damper must be installed on the flue and adjusted to supply a negative draft within the range of 0.04 to 0.08 inches w.c. while unit is operating.

Flue outlet piping

With this venting option, you must use Type-B double-wall (or equivalent) vent materials. Vent materials must be listed by a nationally-recognized test agency for use as vent materials. Make the connections from the unit vent to the sidewall fan/cap as direct as possible with no reduction in diameter. Use the National Fuel Gas Code venting tables for double-wall vent to properly size all vent connectors and stacks. Follow the vent manufacturer’s instructions when installing Type-B vents and accessories, such as firestop spacers, vent connectors, thimbles, caps, etc.

When planning the venting system, avoid possible contact with plumbing or electrical wiring inside walls.

The maximum installed length of sidewall vent pipe with an induced draft fan must not exceed 100 feet (30.5m). Subtract 5 feet (1.5m) for each 90° elbow. Subtract 2.5 feet (0.7m) for each 45° elbow.

Sidewall venting termination

The sidewall vent cap must be installed on an exterior sidewall. The sidewall fan/powered sidewall vent cap and accessories are included in a venting kit which is furnished by the appliance manufacturer in accordance with CSA International requirements. This venting kit includes the powered sidewall fan/cap, proving switch and all necessary relays to interlock with the heaters control system.

The sidewall fan/powered vent cap must be interlocked with the units control system to start the fan on a call for heat and prove fan operation before the boiler fires. Plug-in and terminal strip connections are provided on the unit for easy connection of the factory supplied vent kit and control package for the sidewall vent fan. See the installation instructions provided with the vent kit.

Sidewall vent termination clearances and location

Locate the bottom of the vent terminal at least 12 inches (30cm) above grade and above normal snow levels. Locate the bottom of the vent terminal at least 7 feet (2.13m) above grade when located adjacent to public walkways. Do not terminate directly above a public walkway.

Do not terminate the venting system in a window well, stairwell, alcove, courtyard, or other recessed area. Do not terminate the venting system below grade.

Locate vent termination at least 3 feet (0.91m) from an inside corner of an L-shaped structure.

Provide a minimum clearance of 4 feet (1.2m) horizontally from electric meters, gas meters, regulators, and relief equipment. Never locate vent cap above or below electric meters, gas meters, regulators, and relief equipment unless a 4 foot (1.2m) horizontal clearance is maintained.

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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 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 Venting support General informationBarometric damper location Flue outlet piping Conventional negative draft venting seeNegative draft 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 Length of air inlet pipe Vertical DirectAire venting seeCombustion air inlet piping Sidewall air inletCombined air inlet points Vertical Rooftop Air InletClearances 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 productsFlue outlet piping Direct venting seeVertical 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 vent/air inlet location Outdoor installation seeOutdoor vent cap kit Gas pressure test Connecting to gas supplyGas connections Gas connectionGas train and controls Combination gas valvesVenting 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 Set DHW operation Configuration of the cascadeSet clock How the appliance operates Operating informationGeneral 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 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. HdMinimum water temperatures domestic hot water use Thermostat adjustment procedureDomestic water temperatures Cathodic protection Optional relief valveThermal expansion Location of Cold Water Supply Piping ConnectionsService technician Maintenance Maintenance and annual startupOwner 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 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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