Natural gas, Propane Gas | Lochinvar 400-801 manual

4 Gas connections (continued)

Outdoor Knight XL Installation & Operation Manual

WARNING

Failure to apply pipe sealing compound as detailed in this manual can result in severe personal injury, death, or substantial property damage.

Use two wrenches when tightening gas piping at boiler (FIG. 4-4), using one wrench to prevent the boiler gas line connection from turning. Failure to support the boiler gas connection pipe to prevent it from turning could damage gas line components.

Natural gas:

Pipe sizing for natural gas

1.Refer to Table 4A for pipe length and diameter. Based on rated boiler input (divide by 1,000 to obtain cubic feet per hour).

a.Table 4A is only for natural gas with speciﬁc gravity 0.60 inches, with a pressure drop through the gas piping of 0.5 inches w.c.

b.For additional gas pipe sizing information, refer to ANSI Z223.1 (or B149.1 for Canadian installations).

Figure 4-4Inlet Pipe with Backup Wrench

USE BACKUP WRENCH

TO PREVENT PIPE FROM

ROTATING

Natural gas supply pressure requirements

1.Pressure required at the gas valve inlet pressure port:

•Maximum 14 inches w.c. (3.5 kPa) with no ﬂow (lockup) or with boiler on.

•Minimum 4 inches w.c. (.99 kPa) with gas ﬂowing (verify during boiler startup).

2.Install 100% lockup gas pressure regulator in supply line if inlet pressure can exceed 14 inches w.c. (3.5 kPa) at any time. Adjust lockup regulator for 14 inches w.c. (3.5 kPa) maximum.

Propane Gas:

IMG00420

NOTICE	Maximum inlet gas pressure must not
NOTICE	exceed the value speciﬁed. Minimum
	value listed is for the purposes of input
	adjustment.

WARNING

Outdoor Knight XL boilers are typically shipped ready to ﬁre on natural gas. Check boiler rating plate to determine which fuel the boiler is set for. If set to natural gas, it may be converted to LP by installing an oriﬁce or by making a gas valve adjustment (see page 12). In order to operate on LP gas, an oriﬁce MUST BE installed or a gas valve adjustment MUST BE made. Failure to comply could result in severe personal injury, death, or substantial property damage.

Pipe sizing for propane gas

1.Contact gas supplier to size pipes, tanks, and 100% lockup gas pressure regulator.

Propane Supply Pressure Requirements

1.Adjust propane supply regulator provided by the gas supplier for 14 inches w.c. (3.2 kPa) maximum pressure.

2.Pressure required at gas valve inlet pressure port:

•Maximum 14 inches w.c. (3.2 kPa) with no ﬂow (lockup) or with boiler on.

•Minimum 8 inches w.c. (1.9 kPa) with gas ﬂowing (verify during boiler startup).

Ensure that the high gas pressure regulator WARNING is at least 10 feet (3 m) upstream of the

appliance.

400-801 specifications

The Lochinvar 400-801 is a high-efficiency commercial boiler that embodies advanced engineering and cutting-edge technology. Designed for a variety of commercial applications, this boiler is known for its reliability, efficiency, and robust performance.

One of the standout features of the Lochinvar 400-801 is its high thermal efficiency, which can reach up to 99%. This efficiency not only reduces fuel consumption but also lowers operating costs, making it an economical choice for businesses seeking to minimize overhead. The boiler employs a stainless steel fire-tube heat exchanger that ensures optimal heat transfer and durability. This construction allows for enhanced resistance to corrosion, thereby extending the boiler's lifespan.

The Lochinvar 400-801 is equipped with advanced control technologies that enhance its performance. With its built-in SMART SYSTEM control, users can easily monitor and manage the boiler’s operations, optimizing performance while ensuring ease of use. This control system features a user-friendly interface that provides real-time data, including temperature settings, pressure readings, and operational status, allowing for quick diagnostics and efficient troubleshooting.

Safety is paramount in the design of the Lochinvar 400-801. The boiler includes a comprehensive safety system that incorporates multiple safety interlocks and a venting system that prevents backflow and ensures safe exhaust. Moreover, the unit is designed to operate with minimal noise, making it suitable for environments where noise reduction is crucial.

Installation and maintenance of the Lochinvar 400-801 are straightforward, thanks to its compact design and multiple venting options. The low-profile construction allows for flexibility in placement, making it an ideal fit for tight spaces. Maintenance tasks are simplified with accessible components, minimizing downtime and ensuring the system operates efficiently over its lifespan.

In conclusion, the Lochinvar 400-801 stands out in the commercial boiler market with its blend of efficiency, reliability, and innovation. With its advanced technologies and features, businesses can achieve significant energy savings while ensuring comfortable and consistent heat for various applications. The Lochinvar 400-801 is an investment in quality and performance, backed by a well-established brand in the heating industry. Whether for a new installation or a replacement, this boiler offers a comprehensive solution for commercial heating needs.

Lochinvar 400-801 operation manual Natural gas, Propane Gas

Models: 400-801