7 Gas connections

Connecting gas supply piping

1.Remove the front access panel and refer to FIG. 7-1 to pipe gas to the boiler.

a.Install a field supplied sediment trap / drip leg upstream of the boiler gas controls.

Figure 7-1Gas Supply Piping

MANUAL SHUTOFF VALVE

 

(FIELD SUPPLIED)

UNION

GAS SUPPLY

DRIP LEG

Installation & Operation Manual

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

￿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.

3.Purge all air from the gas supply piping.

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

a.Close manual main shutoff valve during any pressure testing at less than 13 inches w.c.

b.Disconnect the boiler and gas valve from the gas supply piping during any pressure testing greater than 13 inches w.c.

￿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.

5.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 WH 55-399 operation manual Gas connections, Connecting gas supply piping

WH 55-399 specifications

The Lochinvar WH 55-399 is a high-efficiency water heater designed for residential and commercial applications, offering a reliable solution for hot water needs. This model represents an advanced approach to water heating, combining cutting-edge technologies and features that ensure optimal performance and energy efficiency.

One of the standout features of the Lochinvar WH 55-399 is its high thermal efficiency, which is a key factor in reducing energy consumption and operating costs. With an efficiency rating exceeding 90%, this water heater ensures that more energy is converted into usable hot water, making it an environmentally friendly choice.

The WH 55-399 utilizes advanced condensing technology, which allows it to extract additional heat from the exhaust gases before they are expelled. This process not only increases efficiency but also significantly decreases greenhouse gas emissions. The unit is also equipped with an intelligent control system that allows for precise temperature adjustments, ensuring that the user has an optimal supply of hot water while maintaining energy savings.

Another important aspect of this model is its impressive recovery rate. The ability to quickly heat water after a significant draw ensures that users will not experience interruptions in their hot water supply, making it ideal for busy households or commercial environments. This is particularly beneficial in applications requiring consistent hot water availability, such as restaurants or athletic facilities.

The Lochinvar WH 55-399 is designed with durability in mind. Constructed from high-quality materials, this water heater boasts a robust tank lined with corrosion-resistant coatings, extending the lifespan of the unit and reducing maintenance needs. Additionally, it features a reliable gas burner and a well-insulated tank, contributing to its overall efficiency and performance.

Safety is also a priority with the WH 55-399. The unit incorporates multiple safety features, including a flame sensor, automatic shut-off valve, and over-temperature protection, ensuring peace of mind for users.

In summary, the Lochinvar WH 55-399 stands out with its combination of high efficiency, advanced technology, and durable construction. Whether for residential or commercial use, this water heater provides a dependable and cost-effective solution for all hot water needs. Its innovative design and performance characteristics make it a top choice for anyone seeking a premium water heating option.