PRIMARY/SECONDARY BOILER PIPING

TO SYSTEM

TO EXPANSION TANK

AND MAKEUP WATER SYSTEM

12” MAX.

FROM SYSTEM

FIG. 80 Primary/Secondary Piping of a Single Boiler

A properly sized primary system pump provides adequate flow to carry the heated boiler water to radiation, air over coils, etc. The fittings that connect the boiler to the primary system should be a maximum of 12" (0.30 m) (or 4 pipe diameters) apart to ensure connection at a point of zero pressure drop in the primary system. There should be 10 pipe diameters of straight pipe before and after the boiler secondary loop connections to prevent turbulent flow at the secondary loop connections. Multiple boilers may also be installed with a primary/secondary manifold system. Multiple boilers should be connected to the common manifold in reverse return to assist in balancing flow to multiple boilers.

The installer must ensure that the boiler has adequate flow without excessive temperature rise. Low system flow can result in overheating of the boiler water which can cause short burner cycles, system noise relief valve discharge and in extreme cases, a knocking flash to steam. These conditions indicate the need to increase boiler flow to and from the boiler. This is generally accomplished by increasing the diameter of the piping that connects the boiler to the primary system. A larger diameter pipe reduces head loss and increases flow.

CAUTION￿

At no time should the system pressure be less than 12 PSIG.

MAKE-UP WATER

FROM SYSTEM

CAP EACH MANIFOLD

TO SYSTEM

FIG. 81 Primary/Secondary Piping of Multiple Boilers

MINIMUM BOILER WATER

TEMPERATURES

Inlet water temperatures below the specified minimum recommendations can excessively cool the products of combustion resulting in condensation on the primary heat exchanger. The boiler is designed to condense only on the secondary heat exchanger. Condensation on the primary heat exchanger can cause operational problems, bad combustion, sooting, flue gas spillage and reduced service life of the related components.

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Lochinvar 1, 000 through 2 warranty PRIMARY/SECONDARY Boiler Piping, Minimum Boiler Water Temperatures
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000, 000 through 2, 1 specifications

Lochinvar 1 is a remarkable achievement in the realm of modern technology and engineering. As a powerful and efficient water heater, it has been designed to cater to a wide range of residential and commercial needs. One of the standout features of Lochinvar 1 is its advanced heating technology, which incorporates a high-efficiency condensing design. This technology allows the unit to achieve impressive energy savings by maximizing heat transfer while minimizing energy consumption.

The Lochinvar 1 utilizes a stainless steel heat exchanger that enhances durability and corrosion resistance. This not only extends the lifespan of the unit but also ensures consistent performance over time. Coupled with a user-friendly control system, users can easily adjust settings and monitor performance, enhancing overall convenience and usability.

Another key characteristic of the Lochinvar 1 is its compact design, making it suitable for a variety of installation environments. Whether in a residential basement or a commercial utility room, the unit’s space-saving configuration allows for efficient use of available area without compromising on capability.

Safety features are integral to the Lochinvar 1, providing peace of mind for users. The unit is equipped with advanced monitoring systems that can detect irregularities and automatically shut down the system if necessary. This not only protects the equipment but also enhances the safety of the environment in which it operates.

In terms of performance, Lochinvar 1 boasts a high recovery rate, ensuring hot water is available on demand. This is particularly beneficial for settings with high water usage, allowing simultaneous operations without lag.

Moreover, the unit supports various venting options, offering flexibility during installation. Whether using traditional vertical venting or innovations like direct venting, Lochinvar 1 accommodates different building designs and local codes, making it highly versatile.

In conclusion, Lochinvar 1 epitomizes the melding of efficiency, reliability, and user-friendly technology. With its high-performance features, robust safety systems, and adaptable installation options, it stands out as a forefront player in the water heating industry, meeting the diverse needs of today's consumers and businesses alike.
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