Lochinvar 497 - 2067 service manual Masonry chimney installation, Inspection of a masonry chimney

Page 19

2 Venting (continued)

Common venting systems may be too large when an existing unit is removed.

At the time of removal of an existing appliance, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while other appliances remaining connected to the common venting system are not in operation.

1.Seal any unused opening in the common venting system.

2.Visually inspect the venting system for proper size and horizontal pitch. Make sure there is no blockage or restriction, leakage, corrosion and other unsafe conditions.

3.If possible, close all building doors and windows. Close all doors between the space in which the appliances remaining connected to the common venting system are located and other building spaces.

4.Turn on clothes dryers and any other appliances not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan.

5.Close fire place dampers.

6.Place in operation the unit being inspected. Follow the lighting instructions. Adjust thermostat so unit will operate continuously.

7.Test for spillage at the draft hood/relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar or pipe.

8.After making sure that each appliance remaining connected to the common venting system properly vents when tested as above, return doors, windows, exhaust fans, fireplace dampers and other gas burning appliances to their previous conditions of use.

9.Correct any improper operation of the common venting system so that the installation conforms to 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. When resizing any portion of the common venting system, resize to approach the minimum size as determined using the appropriate tables 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.

Installation & Service Manual

Masonry chimney installation

A masonry chimney must be properly sized for the installation of a high efficiency gas-fired appliance. Venting of a high efficiency appliance into a cold or oversized masonry chimney can result in operational and safety problems. Exterior masonry chimneys, with one or more sides exposed to cold outdoor temperatures, are more likely to have venting problems. The temperature of the flue products from a high efficiency appliance may not be able to sufficiently heat the masonry structure of the chimney to generate proper draft. This will result in condensing of flue products, damage to the masonry flue/tile, insufficient draft and possible spillage of flue products into an occupied living space. Carefully inspect all chimney systems before installation.

CAUTION

Venting of high efficiency appliances into a

masonry chimney without a sealed stainless

 

 

steel liner can result in operational and safety

 

problems. Any breaks, leaks, or damage to

 

the masonry flue/tile will allow spillage of

 

the positive pressure flue products from the

 

chimney. These flue products can easily

 

escape into an occupied living space causing

 

a health hazard. If there is any doubt about

 

the condition of a masonry chimney, or

 

its acceptability for use after insertion of

 

a corrosion resistant liner system, consult

 

with local code officials.

Inspection of a masonry chimney

A masonry chimney must be carefully inspected to determine its suitability for the venting of flue products. A clay-tile- lined chimney must be structurally sound, straight and free of misaligned tile, gaps between liner sections, missing sections of liner or any signs of condensate drainage at the breaching or clean out. If there is any doubt about the condition of a masonry chimney, it must be relined with a properly-sized and approved chimney liner system.

Vertical vent termination clearances and location

Follow all vertical venting termination information for clearances and location under Vertical Vent Termination Clearances and Location, page 16.

19

Page 18 Page 20
Image 19
Page 18 Page 20
Contents Save this manual for future reference What to do if YOU Smell GASContents Checking equipment WarrantyPlease read before proceeding Special instructionsCodes Safety informationOwner warning Prevention of freezingCopper-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 Indoor clearances from combustible construction InstallationDetermine unit location Locating the unitPump operation Outdoor boiler installationShut-down and draining Freeze protectionNumber Freeze Protection for a Heating Boiler System if requiredCombustion and Ventilation Air Minimum Recommended Combustion AIR Supply to Equipment RoomCombustion air filter 3Combustion air filter Models 497Combustion Air Options Outside Combustion Air, Using DuctsOutside Combustion Air, No Ducts Combustion Air from an Interior Space Exhaust FansVertical vent termination clearances and location VentingGeneral information Venting supportBarometric damper location Vent system optionsFlue Pipe Sizes Model Flue Size Common venting systems Conventional negative draft ventingNegative draft Flue outlet pipingInspection of a masonry chimney Masonry chimney installationOutdoor vent/air inlet location Outdoor installation ventingOutdoor Vent Kits Model Pump Cover Without Pump Cover Outdoor vent kitInlet GAS Pressure Natural Model Connecting to gas supply Gas pipingGas connections Gas pressure testFittings to Equivalent Straight Pipe Suggested GAS Pipe Size for Single Unit InstallationsGas connection Gas train and controlsChecking gas supply pressure GAS Piping Size ChartCombination gas valves Venting of combination gas valves3Measuring gas supply pressure at combination gas valve Gas manifold pressure adjustmentNat. Gas 4Measuring manifold gas pressureWater connections Water connections heating boilers only Pressure Drop ChartBoiler circulator requirements Low system water volume Minimum boiler water temperaturesRun Cycle Output Minimum System Load Temp. Rise 8.33 60 Min LTV Valve Kits Model LTV Valve KIT Low temperature return water systemsSystem Temperature Rise Chart Radiant floor and snow melt heating systemsCommon Manifold Size Min Models 987 Number of Units Common Manifold Size Min Models 497 Number of UnitsGPM Diameter6Primary/secondary piping of multiple boilers 7Boiler with low temperature bypass 8Primary/secondary piping with buffer tank General plumbing rules Installation with a chilled water systemTypical heating boiler installations Boiler flow rateWater treatment Temperature / pressure gaugeBoiler bypass requirements Filling the systemVAC Connecting to electrical supplyElectrical connections AMP Draw DataTerminal strip connection options BurnersOJ1 OJ2 Temperature adjustmentLocating the temperature control Temperature control settingsOutdoor reset option Boiler application Temperature control sensorsRemote sensor for pump delay Placement of sensorsHot surface igniter and ignition control module Remote Wire Connection Wire Gauge Max. Allowable LengthHot surface ignition system Remote mounting of a sensorIgnition and control timings Diagnostic Status IndicationSix Operation and diagnostic lightsSequence Constant Ignition Stage 2 onOFF StartupPurge air from water system Freeze protection when usedCheck/control water chemistry Fill and test water systemStart the boiler Check for gas leaksCheck thermostat circuits Check vent and air pipingMaximum Water Flow Domestic water heatersWater velocity control Initial set-up of 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 Water chemistry Required temperature risePipe Sizing Chart 497 987 Pipe size requirementsHeat exchanger Potable hot water temperature control settingsDomestic water temperature Minimum pump performanceLocation of cold water supply piping connections Cathodic protection High water temperature limit controlOptional relief valve Thermal expansionMaintenance Combustion and ventilation air Adjustment procedure Models 497 Overview Sequence of operationServicing a hot surface igniter and ignition module Ignition system checkoutEnd of sequence Heat transfer processGlossary Hi-Lo Fire Relay Pump Delay Electronic Thermostat FunctionTrial for Ignition Ignition Module Function Igniter Controlled by Ignition ModuleLadder 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.
Top Page Image Contents