Installation & Operation Manual

4 Domestic side (tank) piping (continued)

NOTICE Verify that the combination temperature and pressure relief valve complies with local codes. If the combination temperature and pressure relief valve does not comply with local codes, replace it with one that does. Follow the installation instructions in this section.

Do not place a valve between the combination T&P relief valve and the tank.

Determine T&P relief valve size by the following specifications, unless they conflict with local codes:

-SIT030/040/050 - 3/4" NPT with a minimum CSA Rating of 105,000 Btu/hr.

-SIT065/080/119 - 3/4" NPT with a minimum CSA Rating of 200,000 Btu/hr.

Standard installation

•Install the T&P relief valve in the connection marked “Relief Valve”.

T&P relief valve discharge piping

T&P relief valve discharge piping MUST be:

-made of material serviceable for a temperature of 250°F or greater.

-directed so that hot water flows away from all persons.

-directed to a suitable place for disposal.

-installed so as to allow complete draining of the T&P relief valve and discharge line.

-terminated within 6" of the floor.

T&P relief valve discharge piping MUST NOT be:

-excessively long. Using more than two (2) elbows or 15 feet of piping can reduce discharge capacity.

-directly connected to a drain. Refer to local codes.

-subject to freezing.

NOTICE

The Lochinvar SIT series water heaters

will absorb/store less than 200,000 Btu/

 

hr when domestic water outlet

 

temperature is 210°F and boiler water

 

supply temperature is 240°F. Listed

 

outputs are based on ASME Section VIII

 

Interpretation VIII-1-86-136. Check

Do not install any valve between the T&P ￿ WARNING relief valve and the tank connection or

on the T&P relief valve discharge piping. Improper placement and piping of T&P relief valve can cause severe personal injury, death or substantial property damage.

with local codes for applicability.

Table 4A

Minimum Relief Valve (CSA Rating)

Model

Btu/hr

SIT030

105,000

 

 

SIT040

105,000

￿CAUTION

The T&P relief valve is not intended for constant duty, such as relief of pressure due to repeated normal system expansion. Correct this condition by installing a properly sized expansion tank in a domestic water system. Refer to the expansion tank manufacturer’s installation instructions for proper sizing.

SIT050

105,000

SIT065

200,000

 

 

SIT080

200,000

 

 

SIT119

200,000

Failure to install and maintain a new, listed ￿ WARNING 3/4" X 3/4" T&P relief valve will release

the manufacturer from any claim which might result from excessive temperature and pressures.

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Lochinvar SIT030 operation manual Btu/hr, SIT050 105,000 SIT065 200,000 SIT080 SIT119
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SIT030, SIT119 specifications

Lochinvar is a renowned manufacturer of high-efficiency heating solutions, including a range of commercial and residential boilers. Among their offerings are the Lochinvar SIT119 and SIT030 models, which exemplify the brand's commitment to innovation and efficiency in modern heating systems.

The Lochinvar SIT119 is designed for medium to large residential applications, boasting a powerful heating capacity. This model features a robust stainless steel heat exchanger that not only enhances durability but also promotes optimal heat transfer. As part of Lochinvar’s commitment to energy efficiency, the SIT119 incorporates advanced features such as a modulating burner system that adjusts the flame output based on the heating demand, resulting in lower energy consumption and reduced operational costs.

In addition to its efficiency, the SIT119 is equipped with user-friendly controls that allow homeowners and technicians to easily manage and monitor the system. Its intuitive digital display provides real-time information on system performance and diagnostic capabilities, facilitating maintenance and troubleshooting. Furthermore, the SIT119’s compact design enables versatile installation options, making it suitable for various residential spaces.

On the other hand, the Lochinvar SIT030 is tailored for smaller residential applications. Despite its smaller size, it doesn’t compromise on performance or efficiency. This model also features a high-quality stainless steel heat exchanger, ensuring longevity and consistent heating performance. Like the SIT119, the SIT030 utilizes a modulating burner system to optimize energy use, making it an environmentally friendly choice for homeowners seeking effective heating solutions.

One notable characteristic of the SIT030 is its low NOx emission design, which aligns with contemporary environmental standards and helps reduce the carbon footprint associated with heating. Additionally, both models support easy integration with existing heating systems and can be paired with renewable energy sources, such as solar thermal systems, maximizing their efficiency and sustainability.

In summary, the Lochinvar SIT119 and SIT030 models stand out in the heating market, combining advanced technologies with high efficiency and user-friendly features. Their stainless steel construction, modulating burners, compact design, and emissions compliance make them excellent choices for homeowners looking to invest in reliable and eco-conscious heating solutions. With these models, Lochinvar continues to lead in producing innovative products that meet the evolving demands of the heating industry.
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