Lochinvar 497 - 2067 Freeze Protection for a Heating Boiler System if required, Number

Page 12

Installation & Service Manual

1 Determine unit location

Freeze Protection for a Heating Boiler System (if required)

WARNING

Do not use undiluted or automotive type

 

anti-freeze.

1.Use only properly diluted inhibited glycol anti-freezedesignedforhydronicsystems.Inhibited propyleneglycolisrecommendedforsystemswhere incidental contact with drinking water is possible.

2.A solution of 50% antifreeze will provide maximum protection of approximately -30°F.

3.Follow the instructions from the antifreeze manufacturer. Quantity of antifreeze required is based on total system volume including expansion tank volume.

4.Glycol is denser than water and changes

the viscosity of the system. The addition of glycol will decrease heat transfer and increase frictional loss in the boiler and related piping. A larger pump with more capacity (15% to 25% more) may be required

to maintain desired flow

rates and

prevent a noise problem in a

glycol system.

Combustion and Ventilation Air

Provisions for combustion and ventilation air must be in accordance with Section 5.3, Air for Combustion and Ventilation, of the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CAN/CGA-B149 Installation Code for Gas Burning Appliances and Equipment, or applicable provisions of the local building codes.

Provide properly-sized openings to the equipment room to assure adequate combustion air and proper ventilation when the unit is installed with conventional venting or sidewall venting.

*Outside air openings shall directly communicate with the outdoors. When combustion air is drawn from the outside through a duct, the net free area of each of the two openings must have twice (2 times) the free area required for Outside Air/2 Openings. The above requirements are for the boiler only; additional gas fired appliances in the equipment room will require an increase in the net free area to supply adequate combustion air for all appliances.

5.Local codes may require a back flow preventer or actual disconnect from city water supply when antifreeze is added to the system.

TABLE 1B

MINIMUM RECOMMENDED COMBUSTION

AIR SUPPLY TO EQUIPMENT ROOM

 

*Outside Air from

 

Inside Air from

Inside Air from

Model

2 Openings Directly from

*Outside Air from

2 Ducts Delivered from

2 Ducts Delivered from Interior

Outdoors

1 Opening Directly

Outdoors

Space

Number

Top

Bottom

from Outdoors, in2

Top

Bottom

Top

Bottom

 

 

Opening, in2

Opening, in2

 

Opening, in2

Opening, in2

Opening, in2

Opening, in2

497

125

125

167

250

250

500

500

(806 cm2)

(806 cm2)

(1077 cm2)

(1613 cm2)

(1613 cm2)

(3226 cm2)

(3226 cm2)

647

163

163

217

325

325

650

650

(1052 cm2)

(1052 cm2)

(1400 cm2)

(2097 cm2)

(2097 cm2)

(4194 cm2)

(4194 cm2)

747

188

188

250

375

375

750

750

(1213 cm2)

(1213 cm2)

(1613 cm2)

(2420 cm2)

(2420 cm2)

(4839 cm2)

(4839 cm2)

987

248

248

330

495

495

990

990

(1600 cm2)

(1600 cm2)

(2129 cm2)

(3194 cm2)

(3194 cm2)

(6388 cm2)

(6388 cm2)

1257

315

315

420

630

630

1260

1260

(2032 cm2)

(2032 cm2)

(2710 cm2)

(4065 cm2)

(4065 cm2)

(8130 cm2)

(8130 cm2)

1437

360

360

480

720

720

1440

1440

(2323 cm2)

(2323 cm2)

(3097 cm2)

(4646 cm2)

(4646 cm2)

(9291 cm2)

(9291 cm2)

1797

450

450

600

900

900

1800

1800

(2903 cm2)

(2903 cm2)

(3871 cm2)

(5807 cm2)

(5807 cm2)

(11614 cm2)

(11614 cm2)

2067

518

518

690

1035

1035

2070

2070

(3342 cm2)

(3342 cm2)

(4452 cm2)

(6678 cm2)

(6678 cm2)

(13356 cm2)

(13356 cm2)

12

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Contents What to do if YOU Smell GAS Save this manual for future referenceContents Warranty Please read before proceedingSpecial instructions Checking equipmentSafety information Owner warningPrevention of freezing CodesCopper-fin How it works Copper-fin How it works Models 987 2067 Front View Models 987 2067 Rear View Ratings Copper-fin =B=R RatingCopper-fin Specifications Installation Determine unit locationLocating the unit Indoor clearances from combustible constructionOutdoor boiler installation Shut-down and drainingFreeze protection Pump operationFreeze Protection for a Heating Boiler System if required Combustion and Ventilation AirMinimum Recommended Combustion AIR Supply to Equipment Room Number3Combustion air filter Models 497 Combustion air filterOutside Combustion Air, Using Ducts Combustion Air OptionsOutside Combustion Air, No Ducts Exhaust Fans Combustion Air from an Interior SpaceVenting General informationVenting support Vertical vent termination clearances and locationVent system options Barometric damper locationFlue Pipe Sizes Model Flue Size Conventional negative draft venting Negative draftFlue outlet piping Common venting systemsMasonry chimney installation Inspection of a masonry chimneyOutdoor installation venting Outdoor vent/air inlet locationOutdoor vent kit Outdoor Vent Kits Model Pump Cover Without Pump CoverConnecting to gas supply Gas piping Gas connectionsGas pressure test Inlet GAS Pressure Natural ModelSuggested GAS Pipe Size for Single Unit Installations Gas connectionGas train and controls Fittings to Equivalent Straight PipeGAS Piping Size Chart Combination gas valvesVenting of combination gas valves Checking gas supply pressureGas manifold pressure adjustment 3Measuring gas supply pressure at combination gas valve4Measuring manifold gas pressure Nat. GasWater connections Pressure Drop Chart Water connections heating boilers onlyBoiler circulator requirements Minimum boiler water temperatures Low system water volumeRun Cycle Output Minimum System Load Temp. Rise 8.33 60 Min Low temperature return water systems System Temperature Rise ChartRadiant floor and snow melt heating systems LTV Valve Kits Model LTV Valve KITCommon Manifold Size Min Models 497 Number of Units GPMDiameter 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 Installation with a chilled water system Typical heating boiler installationsBoiler flow rate General plumbing rulesTemperature / pressure gauge Boiler bypass requirementsFilling the system Water treatmentConnecting to electrical supply Electrical connectionsAMP Draw Data VACBurners Terminal strip connection optionsTemperature adjustment Locating the temperature controlTemperature control settings OJ1 OJ2Outdoor reset option Temperature control sensors Remote sensor for pump delayPlacement of sensors Boiler applicationRemote Wire Connection Wire Gauge Max. Allowable Length Hot surface ignition systemRemote mounting of a sensor Hot surface igniter and ignition control moduleDiagnostic Status Indication Ignition and control timingsOperation and diagnostic lights Sequence Constant IgnitionStage 2 on SixStartup OFFFreeze protection when used Check/control water chemistryFill and test water system Purge air from water systemCheck for gas leaks Check thermostat circuitsCheck vent and air piping Start the boilerDomestic water heaters Water velocity controlInitial set-up of maximum water flow Maximum Water Flow1Typical water heater piping with storage tank 2Single water heater piping with two storage tanks Common Manifold Size Min Models 497 Number of Units4Multiple water heater piping with multiple storage tanks Required temperature rise Pipe Sizing Chart 497 987Pipe size requirements Water chemistryPotable hot water temperature control settings Domestic water temperatureMinimum pump performance Heat exchangerLocation of cold water supply piping connections High water temperature limit control Optional relief valveThermal expansion Cathodic protectionMaintenance Combustion and ventilation air Adjustment procedure Models 497 Sequence of operation Servicing a hot surface igniter and ignition moduleIgnition system checkout OverviewHeat transfer process End of sequenceGlossary Pump Delay Electronic Thermostat Function Trial for Ignition Ignition Module FunctionIgniter Controlled by Ignition Module Hi-Lo Fire RelayDiagrams Ladder diagramDiagrams 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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