Lochinvar 497 - 2067 Outdoor boiler installation, Shut-down and draining, Freeze protection

Page 11

Installation & Service Manual

1 Determine unit location (continued)

 

 

 

Outdoor boiler installation

 

TABLE 1A

 

 

COMBUSTIBLE FLOOR KITS

Adequate hydronic system antifreeze must be used. A snow

Model

 

Kit Number

 

screen should be installed to prevent snow and ice accumulation

497

 

CFK3302

around the unit or its venting system.

 

 

647

 

CFK3303

Shut-down and draining

747

 

CFK3304

If for any reason, the unit is to be shut off, the following

 

 

 

Freeze protection

precautionary measures must be taken:

1. Shut off gas supply.

 

 

 

Although these units are CSA International design- certified for outdoor installations, such installations are not recommendedinareaswherethedangeroffreezingexists.Youmust provide proper freeze protection for outdoor installations, units installed in unheated mechanical rooms or where temperatures may drop to the freezing point or lower. If freeze protection is not provided for the system, a low ambient temperature alarm is recommended for the mechanical room. Damage to the unit by freezing is non-warrantable.

Anytime the temperature measured at any of the sensors (except the outside air temperature sensor) drops below 40°F, the control turns on the pump contact and the alarm relay. The pump will shut off when both sensors are above 50°F.

Pump operation

This unit is equipped with a pump delay of 30 seconds. If continuous operation of the pump is desired, the pump must be electrically connected to another circuit. Connection of the pump to this unit will provide intermittent pump delay operation.

Location

Locate indoor boilers and water heaters in a room having a tem- perature safely above freezing [32°F (0°C)].

2.Shut off water supply.

3.Shut off electrical supply

4.Drain the unit completely. Remove one threaded plug or bulbwell from the inlet side of the front header and one from the outlet side of the front header on the heat exchanger. Blow all water out of the heat exchanger (see FIG.'s 1-2A and 1-2B).

5.Drain pump and piping.

Figure 1-2A_Drain the unit_Models 497 - 747

CAUTION

A mechanical room operating under a negative

 

draft pressure may experience a down draft

 

in the flue of a boiler when it is not firing.

 

The cold outside air pulled down the flue

 

may freeze a heat exchanger. This condition

 

must be corrected to provide adequate freeze

 

protection.

Hydronic systems anti-freeze

Freeze protection for a heating boiler or hot water supply boiler using an indirect coil can be provided by using hydronic system antifreeze. Follow the appliance manufacturers instructions. Do not use undiluted or automotive type antifreeze.

DRAIN PLUG

Figure 1-2B_Drain the unit_Models 987 - 2067

DRAIN PLUG (2X)

11

Page 10 Page 12
Image 11
Page 10 Page 12
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 497Outside Combustion Air, No Ducts Outside Combustion Air, Using DuctsCombustion Air Options Combustion Air from an Interior Space Exhaust FansVertical vent termination clearances and location VentingGeneral information Venting supportFlue Pipe Sizes Model Flue Size Vent system optionsBarometric damper location 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 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 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