Lochinvar 402 - 2072 Venting, Identify your appliance’s vent system, CAT IV Flue pipe materials

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Installation & Operation Manual

2 Venting

BEFORE YOU BEGIN

Identify your appliance’s vent system:

This manual covers venting requirements for CAT I models and CAT IV vent materials. Be sure to correctly identify the type of vent system your appliance requires before proceeding.

C(F,H) (N,L)0402 C(F,H) (N,L)0502 C(F,H) (N,L)0652 C(F,H) (N,L)0752 C(F,H) (N,L)0992 C(F,H) (N,L)1262

C(F,H) (N,L)1442 C(F,H) (N,L)1802 C(F,H) (N,L)2072

Venting options:

A

B C D = B-Vent Material

 

CAT I

E

= Direct Vent Options

 

CAT IV

F = Outdoor Vent Option

￿ DANGER

Failure to use correct venting materials can result in loss of life from flue gas spillage into working or living

 

space.

 

Venting Category Definitions: (Reference National Fuel Gas Code ANSI Z223.1)

CAT I: Negative pressure non-condensing

An appliance that operates with a non-positive vent static pressure with a vent gas temperature that avoids excessive condensate production in the vent.

CAT IV: Positive pressure condensing

An appliance that operates with a positive vent static pressure with a vent gas temperature that may cause excessive condensate production in the vent.

CAT IV Flue pipe materials

The following manufacturers supply flue materials suitable for these models when installed as CAT IV. All materials are made with AL29-4C stainless steel.

Heat-Fab Inc., Saf-T CI Vent with AL29-4C stainless steel

Protech Systems Inc., Fas N Seal Vent with AL29-4C stainless steel

Metal-Fab Inc., Corr/Guard Vent with AL29-4C stainless steel

Or other listed Category IV vent systems suitable for a condensing, positive pressure, gas fired appliance.

A Category IV flue MUST have all vent joints and seams sealed gastight and have provisions for a drain to properly collect and dispose of condensate that may occur in the venting system.

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Contents Save this manual for future reference Models 402Contents Special instructions Please read before proceedingRemoval of Combustion Chamber Lining or Base Panels Owner warning Safety informationCopper-fin II How it works Copper-fin II How it works Copper-fin II How it works Copper-fin =B=R Rating RatingsLocation of unit Determine unit locationIndoor clearances from combustible construction Freeze protectionLocation Outdoor boiler installationHydronic systems anti-freeze Combustion and ventilation airMinimum Recommended Combustion AIR Supply to Equipment Room Outside Combustion Air Using Direct VentingCombustion air filter Exhaust fansIdentify your appliance’s vent system VentingCAT IV Flue pipe materials CAT I Negative pressure non-condensingDirect Vent see Venting support General informationBarometric damper location Negative draft Conventional negative draft venting seeFlue 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 Combustion air inlet piping Vertical DirectAire venting seeLength of air inlet pipe Sidewall air inletCombined air inlet points Vertical Rooftop Air InletClearances Directaire Kits Model Horizontal KIT Vertical KIT Venting of flue productsSidewall with fan Sidewall venting seeSidewall venting termination Sidewall vent termination clearances and locationSidewall venting without fan Drain tee installationModels 402 Venting of flue products Horizontal DirectAire venting Powered Venting seeFlue outlet piping Direct venting seeVertical DV venting termination Horizontal DV venting termination Masonry chimney installationHorizontal Vent Termination Clearances and Location Combustion air inlet pipingAir inlet piping materials Connecting the air inlet pipe to the unitLength of air inlet pipe Sealing PVC, CPVC, ABS, dryer vent, and flex duct vent pipeVertical and sidewall combustion air inlet Multiple sidewall direct vent installationsHorizontal combustion air inlet clearances Vertical Combustion Air Inlet ClearancesOutdoor vent/air inlet location Outdoor installation seeOutdoor vent cap kit Gas connections Connecting to gas supplyGas pressure test Gas connectionGas train and controls Combination gas valvesVenting of combination gas valves Checking gas supply pressure GAS Piping Size ChartWater connections Water flow switchInlet and outlet connections Heat exchangerRelief valve Heating boiler installationsPiping of the boiler system Water connections heating boilers onlyLow Temperature Return Water Systems Minimum boiler water temperaturesLow temperature bypass requirements LTV Valve Kits Model LTV Valve KITThree way valves in system Low system water volumeRadiant floor and snow melt heating systems Maximum Flow for Heating BoilerTypical heating boiler installations Temperature / pressure gaugeInstallation with a chilled water system DHW installationDiameter GPM4Primary/Secondary Piping of Multiple Boilers Floor Drain Heating Supply Loop 6Primary/Secondary Piping with Buffer Tank Electrical connections Installation must comply withBoiler operating control module AMP Draw DataEMS or remote thermostat connection Line voltage connectionsLow voltage connections DHW Domestic Hot Water thermostatAlarm contacts Louver proving switchLouver relay System supply sensor recommended use4Low Voltage Field Wiring Connections Wiring of the cascadeStart-up Check vent and air piping Check thermostat circuitsPlacing the boiler in operation Start the boiler1Lighting Instructions Set DHW operation Configuration of the cascadeSet clock General Operating informationHow the appliance operates How the control module operatesProtection features Temperature controlOutdoor 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 Operation Display Sequence of operationCopper-fin II control module MENU/EXIT Display Screen ENTER/RESET UpdownInstaller Access modesUser To save parameters and exit programmingStatus display screens Inlet Open Inlet ***FInlet Shorted Syssup ***FDHW Pump Delay Unit Pump DelaySTG Demand FAN SpeedMIX VAL POS ** % Operation of the cascadeModel Temperature Rise F Temperature Rise AT Full Rate Fire 90 GPM FlowDomestic 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 Heat exchanger Pump operationMinimum Pump Performance Ft. HdMinimum water temperatures domestic hot water use Thermostat adjustment procedureDomestic water temperatures Thermal expansion Optional relief valveCathodic protection Location of Cold Water Supply Piping ConnectionsService technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Check control settings Check all wiringCheck relief valve Inspect/replace hot surface igniter Ignition system checkoutPerform start-up and checks Inspect and clean burnerCheck burner flame Check flue gas passagewaysReview with owner Inspect and clean the heat exchangerOiled bearing circulators Digital Harness Connection diagramSplay Ladder DiagramFlow 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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