Installation & Operation Manual

6Hydronic piping (continued)

Flow switch, relief valve and temperature and pressure gauge installation

Basic steps are listed below to guide you through the installation of the flow switch, relief valve, and temperature and pressure gauge provided with the unit.

1.For Models 399 - 500 install the close nipple on the outlet connection of the heat exchanger. Install the tee with the 3/4 inch fitting positioned vertically and on the top as shown in FIG. 6-1. For Models 600 - 800 install the tee directly to the outlet connection of the heat exchanger with the 3/4 inch fitting positioned vertically and on the top (see FIG. 6-2).

2.For Models 700 - 800 install the 3/4 inch close nipple in the tee. Install the relief valve on the 3/4 inch close nipple (FIG. 6-2). For Models 399 - 600 install the relief valve directly into the 3/4 inch fitting on the tee (FIG. 6-1).

3.Install the close nipple on the downstream side of the relief valve tee (FIG. 6-1).

4.Install the tee with the 1 inch fitting positioned vertically and on the top (FIG. 6-1).

Figure 6-1Flow Switch, Relief Valve and Temperature and Pressure Gauge Installation_Models 399 - 500

RELIEF VALVE

FLOW SWITCH

PADDLE

TEMPERATURE AND

PRESSURE

GAUGE

TEE WITH FITTING ON TOP

(FIELD PROVIDED)

CLOSE NIPPLE (FIELD PROVIDED)

TEE WITH 1” FITTING ON TOP

CLOSE NIPPLE

TEE WITH 3/4” FITTING ON TOP

CLOSE NIPPLE

5.Attach paddle #3 to the flow switch per the manufacturer’s instructions.

6.Install the assembled flow switch into the 1 inch fitting of the tee installed in Step 4 (see FIG. 6-1).

7.Install a field provided close nipple on the downstream side of the flow switch (see FIG.’s 6-1 and 6-2).

8.Install a field provided tee with the gauge fitting positioned vertically and on the top (FIG.’s 6-1 and 6-2)

9.Install the temperature and pressure gauge provided with the unit into the top fitting of the tee (a bushing may be necessary) installed in Step 8 (FIG.’s 6-1 and 6-2).

Figure 6-2Flow Switch, Relief Valve and Temperature and Pressure Gauge Installation_Models 600 - 800

RELIEF VALVE

CLOSE NIPPLE

FLOW SWITCH

PADDLE

TEMPERATURE AND

PRESSURE

GAUGE

NOTICE

Be sure to install the flow switch so that the arrow on the flow switch is pointing in the direction of the flow (see FIG. 6-3).

TEE WITH FITTING ON TOP

(FIELD PROVIDED)

CLOSE NIPPLE (FIELD PROVIDED)

TEE WITH 1” FITTING ON TOP

CLOSE NIPPLE

TEE WITH 3/4” FITTING ON TOP

CLOSE NIPPLE

35

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Lochinvar 399 operation manual Hydronic piping
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399 specifications

Lochinvar 999 - 750, CF-CH(E)-i&s-08,399 is a cutting-edge boiler designed for commercial heating applications. With its robust construction and high efficiency, this model stands out in the crowded market of heating solutions.

One of the main features of the Lochinvar 999 - 750 is its exceptional thermal efficiency rating. The unit incorporates advanced condensing technology that allows it to recover heat from flue gases, which helps in achieving efficiency levels of up to 99%. This efficiency not only reduces energy consumption but also lowers operational costs, making it an excellent investment for businesses looking to minimize their carbon footprint.

The boiler is designed to provide a powerful output of 750 kW, ensuring it meets the heating demands of larger buildings or commercial spaces. Its capacity makes it suitable for a range of applications including schools, hospitals, and industrial facilities. Moreover, the unit features a built-in cascading system that enables multiple boilers to be connected, enhancing system reliability and flexibility.

In terms of technology, the Lochinvar 999 - 750 is equipped with a user-friendly touchscreen interface. This innovative control system allows operators to monitor and adjust settings with ease, providing real-time performance data and alerts for maintenance needs. The intelligent controls optimize operation to match the heating load, further enhancing energy efficiency.

Safety is a top priority with this model. It is built with multiple safety features such as automatic shut-off valves, pressure relief valves, and flame monitoring systems, ensuring safe operation under various conditions. The unit also adheres to stringent industry standards and regulations, making it a reliable choice for commercial applications.

Furthermore, the Lochinvar 999 - 750 is designed with serviceability in mind. Its compact footprint and accessible components simplify maintenance, reducing downtime and associated costs. The unit also supports a variety of fuel sources, including natural gas, propane, and biodiesel, providing flexibility to meet different facility requirements.

In summary, the Lochinvar 999 - 750, CF-CH(E)-i&s-08,399 represents a blend of efficiency, reliability, and safety in commercial heating. Its advanced technologies and thoughtful design make it a powerful solution for various heating needs, making it an ideal choice for businesses aiming for excellence in energy management and operational efficiency.
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