Final checks before starting the boiler

7 Start-up(continued)

 Read the Outdoor Knight XL Service Manual to

familiarize yourself with SMART SYSTEM control

module operation. Read this manual, page 33 for proper

Outdoor Knight XL Installation & Operation Manual

Check gas piping

1.Check around the boiler for gas odor following the procedure on page 46 of this manual (connecting gas supply piping).

steps to start boiler.

 Verify the boiler and system are full of water and all

system components are correctly set for operation.

 Verify the preparation procedures of Section 7, pages 33

and 34 have been completed.

WARNING

If you discover evidence of any gas leak, shut down the boiler at once. Find the leak source with a bubble test and repair immediately. Do not start the boiler again until corrected. Failure to comply could result in severe personal injury, death, or substantial property damage.

 Fill the vent condensate trap with water (removing the

retaining screw in order to remove the 2 inch PVC cap

with the switch located at the top of the trap). Replace

the cap. Press the cap onto the trap until the cap makes

Propane boilers – verify conversion

1.Verify propane conversion has been completed per the Propane Conversion instructions.

contact with the drain. Replace the retaining screw.

 Verify electrical connections are correct and securely

attached.

Start the boiler

1.Read and follow the Operating instructions in FIG. 7-2, page 36.

If boiler does not start correctly

1.Check for loose connections, blown fuse or service switch off?

2.Is boiler water temperature above 200°F (93°C)?

3.Is thermostat set below controlling sensor temperature?

4.Is gas turned on at meter or boiler?

5.Is incoming gas pressure less than 4 inches w.c. (.99 kPa)?

WARNING

DO NOT adjust gas valve outlet pressure. The gas valve is factory-set for the correct outlet pressure. This setting is suitable for natural gas and propane, requiring no ﬁeld adjustment. Attempting to alter the gas valve outlet pressure could result in damage to the valve, causing potential severe personal injury, death, or substantial property damage.

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.

If none of the above corrects the problem, refer to the Troubleshooting Section of the Outdoor Knight XL Service Manual.

Check system and boiler

Check water piping

1.Check system piping for leaks. If found, shut down the boiler and repair immediately. (See WARNINGS on pages 33 and 34 (startup) regarding failure to repair leaks.)

2.Vent any remaining air from the system using manual vents. Air in the system will interfere with circulation and cause heat distribution problems and noise.

Check ﬂame and combustion

1.Turn the main power off to the boiler by placing the “On/Off” switch in the OFF position.

2.Combustion measurements will be made from exhaust opening.

3.Turn the main power on to the boiler by placing the “On/Off” switch in the ON position.

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.