7Gas connections

Connecting gas supply piping

1.Remove the top access panel and refer to FIG.’s 7-1 thru 7-3 to pipe gas to the boiler.

a.Install ground joint union for servicing, when required.

b.Install a manual shutoff valve in the gas supply piping outside boiler jacket when required by local codes or utility requirements.

c.In Canada – When using manual main shutoff valves, it must be identified by the installer.

2.Install sediment trap / drip leg.

Figure 7-1Gas Supply Piping - Model 399

UNION

GAS SUPPLY

Installation & Operation Manual

Figure 7-3Gas Supply Piping - Models 600 - 800

MANUAL SHUTOFF VALVE (FACTORY SUPPLIED)

GAS SUPPLY

DRIP LEG

UNION

3.Support piping with hangers, not by the boiler or its accessories.

SEDIMENT TRAP / DRIP LEG

MANUAL

￿WARNING

The gas valve and blower will not support the weight of the piping. Do not attempt to support the weight of the piping with the boiler or its accessories. Failure to comply could result in severe personal injury, death, or substantial property damage.

SHUTOFF VALVE (FIELD SUPPLIED)

Figure 7-2Gas Supply Piping - Model 500

UNION

FIELD SUPPLIED

GAS SUPPLY

SEDIMENT TRAP / DRIP LEG

MANUAL SHUTOFF VALVE (FACTORY SUPPLIED)

4.Purge all air from the gas supply piping.

5.Before placing the boiler in operation, check the boiler and its gas connection for leaks.

a.The appliance must be disconnected from the gas supply piping system during any pressure testing of that system at a test pressure in excess of 1/2 PSIG (3.5 kPa).

b.The appliance must be isolated from the gas supply piping system by closing a manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 PSIG (3.5 kPa).

c.The appliance and its gas connection must be leak tested before placing it in operation.

￿WARNING Do not check for gas leaks with an open flame – use the bubble test. Failure to use

the bubble test or check for gas leaks can cause severe personal injury, death, or substantial property damage.

6.Use pipe sealing compound compatible with propane gases. Apply sparingly only to male threads of the pipe joints so that pipe dope does not block gas flow.

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Lochinvar 399 operation manual Gas connections, Connecting gas supply 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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