Lochinvar 497 - 2067 service manual Vent system options, Barometric damper location

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Installation & Service Manual

2 Venting (continued)

Figure 2-3_Vent termination from flat roof - 10 ft. or less from parapet wall

Figure 2-4_Vent termination from flat roof - 10 ft. or more from parapet wall

CAUTION

Units which are shut down or will not operate may experience freezing due to convective air flow in flue pipe, through the air inlet, or from negative pressure in the equipment room. In cold climates, operate pump continuously to help prevent freezing of boiler water. Provide proper freeze protection. See Freeze Protection, page 46.

TABLE 2A

FLUE PIPE SIZES

MODEL

FLUE SIZE

MODEL

FLUE SIZE

 

 

 

 

497

6''

1257

12''

647

8''

1437

12''

747

8''

1797

14''

987

10''

2067

14''

Installer may increase diameter one pipe size for ease of installation, if needed.

Vent system options

Vent System Options

This unit has two venting options.

1.Conventional Negative Draft Venting

This option uses a vertical rooftop flue termination.

Combustion air is supplied from the mechanical room. See page 15 for detailed information.

2.Outdoor Installation Venting

This option uses the installation of special air inlet and vent caps on the unit.

All units are shipped from the factory equipped for conventional negative draft venting. All other optional vent systems require the installation of specific vent kits and venting materials. The following is a detailed explanation of the installation requirements for each venting system, components used and part numbers of vent kits for each model.

Barometric damper location

Any venting system option that requires a barometric damper must adhere to the following directions for optimum performance. The preferred location for the barometric damper is in a tee or collar installed in the vertical pipe rising from the unit’s flue outlet. The barometric damper MUST NOT be installed in a bull head tee installed on the unit’s flue outlet. The tee or collar containing the barometric damper should be approximately three feet vertically above the connection to the unit’s flue outlet. This location ensures that any positive velocity pressure from the unit’s internal combustion fan is dissipated and the flue products are rising due to buoyancy generated from the temperature of the flue products. Adjust the weights on the damper to ensure that draft is maintained within the specified ranges.

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Contents Save this manual for future reference What to do if YOU Smell GASContents Please read before proceeding WarrantySpecial instructions Checking equipmentOwner warning Safety informationPrevention of freezing CodesCopper-fin How it works Copper-fin How it works Models 987 2067 Front View Models 987 2067 Rear View Copper-fin =B=R Rating RatingsCopper-fin Specifications Determine unit location InstallationLocating the unit Indoor clearances from combustible constructionShut-down and draining Outdoor boiler installationFreeze protection Pump operationCombustion and Ventilation Air Freeze Protection for a Heating Boiler System if requiredMinimum Recommended Combustion AIR Supply to Equipment Room NumberCombustion air filter 3Combustion air filter Models 497Outside Combustion Air, No Ducts Outside Combustion Air, Using DuctsCombustion Air Options Combustion Air from an Interior Space Exhaust FansGeneral information VentingVenting support Vertical vent termination clearances and locationFlue Pipe Sizes Model Flue Size Vent system optionsBarometric damper location Negative draft Conventional negative draft ventingFlue outlet piping Common venting systemsInspection of a masonry chimney Masonry chimney installationOutdoor vent/air inlet location Outdoor installation ventingOutdoor Vent Kits Model Pump Cover Without Pump Cover Outdoor vent kitGas connections Connecting to gas supply Gas pipingGas pressure test Inlet GAS Pressure Natural ModelGas connection Suggested GAS Pipe Size for Single Unit InstallationsGas train and controls Fittings to Equivalent Straight PipeCombination gas valves GAS Piping Size ChartVenting of combination gas valves Checking gas supply pressure3Measuring gas supply pressure at combination gas valve Gas manifold pressure adjustmentNat. Gas 4Measuring manifold gas pressureWater connections Boiler circulator requirements Pressure Drop ChartWater connections heating boilers only Run Cycle Output Minimum System Load Temp. Rise 8.33 60 Min Minimum boiler water temperaturesLow system water volume System Temperature Rise Chart Low temperature return water systemsRadiant floor and snow melt heating systems LTV Valve Kits Model LTV Valve KITGPM Common Manifold Size Min Models 497 Number of UnitsDiameter Common Manifold Size Min Models 987 Number of Units6Primary/secondary piping of multiple boilers 7Boiler with low temperature bypass 8Primary/secondary piping with buffer tank Typical heating boiler installations Installation with a chilled water systemBoiler flow rate General plumbing rulesBoiler bypass requirements Temperature / pressure gaugeFilling the system Water treatmentElectrical connections Connecting to electrical supplyAMP Draw Data VACTerminal strip connection options BurnersLocating the temperature control Temperature adjustmentTemperature control settings OJ1 OJ2Outdoor reset option Remote sensor for pump delay Temperature control sensorsPlacement of sensors Boiler applicationHot surface ignition system Remote Wire Connection Wire Gauge Max. Allowable LengthRemote mounting of a sensor Hot surface igniter and ignition control moduleIgnition and control timings Diagnostic Status IndicationSequence Constant Ignition Operation and diagnostic lightsStage 2 on SixOFF StartupCheck/control water chemistry Freeze protection when usedFill and test water system Purge air from water systemCheck thermostat circuits Check for gas leaksCheck vent and air piping Start the boilerWater velocity control Domestic water heatersInitial set-up of maximum water flow Maximum Water Flow1Typical water heater piping with storage tank 2Single water heater piping with two storage tanks Models 497 Number of Units Common Manifold Size Min4Multiple water heater piping with multiple storage tanks Pipe Sizing Chart 497 987 Required temperature risePipe size requirements Water chemistryDomestic water temperature Potable hot water temperature control settingsMinimum pump performance Heat exchangerLocation of cold water supply piping connections Optional relief valve High water temperature limit controlThermal expansion Cathodic protectionMaintenance Combustion and ventilation air Adjustment procedure Models 497 Servicing a hot surface igniter and ignition module Sequence of operationIgnition system checkout OverviewEnd of sequence Heat transfer processGlossary Trial for Ignition Ignition Module Function Pump Delay Electronic Thermostat FunctionIgniter Controlled by Ignition Module Hi-Lo Fire RelayLadder diagram DiagramsDiagrams Connection diagram Connection diagram

497 - 2067 specifications

Lochinvar 497 - 2067 is a highly efficient and versatile condensing boiler that is designed to meet the diverse heating needs of residential and commercial applications. Known for its impressive performance and advanced technology, the Lochinvar 497 - 2067 has garnered a reputation as a reliable choice among heating professionals.

One of the standout features of the Lochinvar 497 - 2067 is its impressive thermal efficiency. The boiler boasts an efficiency rating of up to 95% AFUE (Annual Fuel Utilization Efficiency), allowing users to significantly reduce their energy costs while minimizing environmental impact. This efficiency is facilitated by its innovative condensing technology, which captures and reuses heat from exhaust gases for optimal performance.

The Lochinvar 497 - 2067 is equipped with a robust stainless steel heat exchanger designed to handle high temperatures and ensure long-lasting performance. The heat exchanger’s design maximizes heat transfer, while its corrosion-resistant properties guarantee durability over time. This contributes to the boiler's overall longevity and serviceability, reducing the need for frequent replacements.

Control is another critical feature of the Lochinvar 497 - 2067. The boiler comes with an advanced control system that enables easy management of system operations. Users can take advantage of features such as outdoor reset control, which adjusts the temperature of the boiler based on external weather conditions, enhancing system efficiency and comfort.

In terms of safety, the Lochinvar 497 - 2067 incorporates several cutting-edge safety features, including a flame detection system and multiple safety shut-off devices. These safeguards help to ensure the safe operation of the boiler, providing peace of mind to users and heating professionals alike.

Another important characteristic is the compact design of the Lochinvar 497 - 2067, which allows for flexible installation in various settings, including tight spaces. Its lightweight structure further simplifies the installation process, making it a practical choice for contractors.

In summary, the Lochinvar 497 - 2067 is an exceptional high-efficiency condensing boiler that combines advanced technology, durability, and ease of use. With its impressive thermal efficiency, superior heat exchanger design, advanced control systems, and enhanced safety measures, it stands out as a top choice for those seeking reliable heating solutions. This boiler not only meets but exceeds modern demands for energy efficiency and performance, solidifying its position in the market.
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