Lochinvar 402 - 2072 operation manual Exhaust fans, Combustion air filter

Page 12

Installation & Operation Manual

1 Determine unit location

Exhaust fans

Any fan or equipment which exhausts air from the boiler room may deplete the combustion air supply and/or cause a down draft in the venting system. Spillage of flue products from the venting system into an occupied living space can cause a very hazardous condition that must be immediately corrected. If a fan is used to supply combustion air to the boiler room, the installer must make sure that it does not cause drafts which could lead to nuisance operational problems with the boiler.

Vertical DirectAire™, Horizontal DirectAire™, and Direct Vent venting systems have specific requirements for combustion air ducts from the outside which are directly connected to the unit. See the requirements for combustion air duct in the venting section.

NOTICE

Use of filters having MERV (Minimum

Efficiency Reporting Value) ratings higher than

 

4 is not recommended. Higher efficiency

 

low-micron filters can limit combustion

 

air leading to either nuisance problems or

 

potential component damage if used over

 

prolonged periods of time. Filters having

 

a MERV rating of 5 to 6 may be used

 

on a limited basis during the construction

 

phase of a project provided they are replaced

 

once filter loading becomes apparent. After

 

the construction phase is completed, it is

 

recommended that the filter be changed to a

 

4 or lower MERV disposable type filter.

Combustion air filter

This unit has a standard air filter located at the combustion air inlet. This filter helps ensure clean air is used for the combustion process. Check this filter every month and replace when it becomes dirty. The filter size on Models 402 - 752 is 12" x 12" x 1" (30.5cm x 30.5cm x 2.5cm) and 16" x 16" x 1" (40.6cm x 40.6cm x 2.5 cm) on Models 992 - 2072. You can find these commercially available filters at any home center or HVAC supply store.

For convenience and flexibility, you can direct the combustion air inlet from either the back or right side of the unit. To arrange the combustion air inlet for side entry, follow the steps below:

1.Remove the metal panel from the unit’s side wall (see FIG. 1-6).

2.Remove screws from the air filter/bracket assembly.

3.Move the filter/bracket assembly from the rear of unit to the side opening (see FIG. 1-7).

4.Attach filter/bracket assembly to the unit’s side using the pre-drilled screw holes.

5.Attach the metal panel to the rear combustion air opening to seal it off.

Figure 1-6_Metal Panel Covering Side Combustion

Figure 1-7_Moving Air Filter / Bracket Assembly from

Air Inlet

Rear of Unit to Side

NOTICE

CAUTION

During construction the air filter should be checked more frequently to ensure it does not become clogged with combustion dirt and debris.

Sustained operation of an appliance with a clogged filter may result in nuisance operational problems, bad combustion, and non-warrantable component failures.

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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 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 General information Venting supportBarometric damper location Conventional negative draft venting see Negative draftFlue outlet piping 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 Vertical DirectAire venting see Combustion air inlet pipingLength of air inlet pipe Sidewall air inletVertical Rooftop Air Inlet Combined air inlet pointsClearances 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 productsDirect venting see Flue outlet pipingVertical 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 installation see Outdoor vent/air inlet locationOutdoor vent cap kit Connecting to gas supply Gas connectionsGas pressure test Gas connectionCombination gas valves Gas train and controlsVenting 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 Configuration of the cascade Set DHW operationSet clock Operating information GeneralHow the appliance operates 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 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. HdThermostat adjustment procedure Minimum water temperatures domestic hot water useDomestic water temperatures Optional relief valve Thermal expansionCathodic protection Location of Cold Water Supply Piping ConnectionsMaintenance Maintenance and annual startup Service technicianOwner 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 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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