Installation & Service Manual

7 Domestic water heaters

Minimum pump performance

This is based on heating potable water with a hardness of 5 to 25 grains per gallon and/or total dissolved solids not exceeding 350 ppm. See Water Chemistry, page 53.

TABLE 7D

Minimum Pump Performance

Model

GPM

FT/HD

 

 

 

497 - 747

55

10

987 - 2067

90

15

Heat exchanger

This is a highly sophisticated heat exchanger, designed to carry water in such a way that it generates a scouring action which keeps all interior surfaces free from build up of impurities. The straight line, two pass design of the tubes sends water into the headers at a properly rated velocity. The configuration of the headers, in turn, creates a high degree of turbulence which is sufficient to keep all contaminants in suspension. This “scouring action” provides greater cost savings for owners.

Tubes are always able to transfer heat at peak efficiency. Every surface within this water containing section is of a non ferrous material, providing clear, clean, rust free hot water. Straight copper tubes finned on the outside for maximum heat transfer and coated cast iron one piece cored headers make up an entirely rust proof unit. On all models, header inspection plugs can be removed for field inspection and cleaning of copper tubes. The entire heat exchanger may be easily removed from the unit.

Potable hot water temperature control settings

Domestic water temperature

WARNING You must take adequate care to prevent scald injury when storing water at elevated

temperatures for domestic use.

This unit has an adjustable temperature control to maintain the desired water temperature set point. See Setting Temperature Control, page 39, for instructions to adjust the temperature control. The temperature control is factory preset at approximately 125°F (52°C) or less. Households with small children or invalids may require 120°F (49°C) or lower temperature hot water to reduce risk of scald injury.

Operate this high efficiency hot water heater at a temperature setting high enough to prevent condensing of the products of combustion on the unit’s heat exchanger or in the attached venting system. A water temperature setting that is above the dew point of the gas combustion products should prevent condensate formation

WARNING To guard against scald injury, you must use a properly sized thermostatic mixing valve to

supply domestic hot water at temperatures less than 125°F (52°C).

WARNING Return water temperatures must not be less than 140°F (60°C). If lower return

water temperatures are required, follow the instructions for Low Temperature Return Water Systems, page 30.

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Lochinvar 497 - 2067 Potable hot water temperature control settings, Minimum pump performance, Heat exchanger, Gpm Ft/Hd

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.