Lochinvar Knight XL KBN400 Boiler Instruction Manual
Lochinvar Knight XL KBN400 Boiler
Lochinvar Knight XL KBN400 Boiler
Lochinvar Knight XL KBN400 Boiler
Lochinvar Knight XL KBN400 Boiler
Lochinvar Knight XL KBN400 Instructions
Here we offer the Lochinvar Knight XL KBN400 Boiler manual completely free and in English. We have cataloged this manual in the Boilers section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Lochinvar Knight XL KBN400 Boiler, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.
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Lochinvar Knight XL KBN400 Boiler Specifications
| Specification | Value (KBN400 Model) |
|---|---|
| Model Number | KBN400 |
| AHRI Gross Input (MBH) | 399 |
| AHRI Net Output (MBH) | 326 |
| Boiler Water Content (Gallons) | 3.4 |
| Water Connections Size | 1-1/2" NPT |
| Gas Connections Size | 1" NPT |
| Air Intake Pipe Size | 4 inches (102 mm) |
| Vent Pipe Size | 4 inches (102 mm) |
| Electrical Supply | 120 VAC, 15 Amp (recommended disconnect) |
| Maximum Working Pressure (Relief Valve Setting) | 50 PSI |
| Natural Gas Supply Pressure (Min/Max flowing) | 4 inches w.c. / 14 inches w.c. |
| Propane Gas Supply Pressure (Min/Max flowing) | 8 inches w.c. / 14 inches w.c. |
| Minimum Combustion Air Piping Length | 12 equivalent feet (3.7 m) |
| Maximum Combustion Air Piping Length | 100 equivalent feet (30.5 m) |
| Minimum Vent Piping Length | 12 equivalent feet (3.7 m) |
| Maximum Vent Piping Length | 100 equivalent feet (30.5 m) |
| Modulation Range | 20% to 100% |
Lochinvar Knight XL KBN400 Boiler Details
The Lochinvar Knight XL KBN400 Boiler represents a pinnacle in high-efficiency heating solutions, leveraging advanced engineering to deliver optimal performance. Its core is a durable stainless steel heat exchanger, designed for full condensing operation. This ensures maximum heat transfer efficiency while effectively resisting corrosion from flue gases. The robust construction promises extended operational life and consistent heating output.
At the heart of its intelligent operation is the SMART SYSTEM Control Module. This sophisticated electronic control unit features an intuitive LCD display and a navigation dial, allowing both users and qualified technicians to monitor and adjust operating conditions. It provides comprehensive access to temperature settings, operational modes, and diagnostic information, ensuring precise control over the heating process.
The boiler's combustion system integrates a high-performance blower, a precise gas valve, and a venturi to create an optimal air-gas mixture. Its metal fiber and stainless steel burner provides a wide range of firing rates, from 20% to 100% modulation. This capability allows the KBN400 to match varying heating demands efficiently, reducing energy consumption during periods of lower load.
For venting, the KBN400 utilizes a specialized pressurized system compatible with several materials, including PVC, CPVC, Polypropylene, and Stainless Steel. This flexibility accommodates various installation scenarios, whether through a sidewall or vertically through a roof. Proper installation is critical to prevent combustion air contamination, safeguarding the boiler's performance and longevity.
Safety is paramount, with multiple integrated features protecting the system. These include a flue gas sensor, a boiler outlet temperature sensor acting as a high limit, and an air pressure switch to detect blockages. Additional layers of protection are provided by an over-temp switch, a burner door temperature switch, and a relief valve set at 50 PSI, all working in concert to ensure safe operation.
The KBN400 also boasts advanced freeze protection and anti-cycling mechanisms. The freeze protection feature automatically activates the boiler and system pumps, and even the burner, if the inlet temperature drops too low, preventing costly damage. Anti-cycling intelligently manages burner operation, preventing frequent starts and stops that could reduce efficiency and component lifespan.
For larger applications, the KBN400 can be integrated into a Cascade System, allowing up to eight boilers to operate in sequence. This system can be configured for Lead/Lag or Efficiency Optimization control, ensuring balanced run-time and optimal performance across multiple units. This scalability makes it a versatile choice for commercial and large residential heating demands.
Maintenance is streamlined with owner-level daily, monthly, and periodic checks, alongside annual service by a qualified technician. Key tasks include cleaning the condensate trap, inspecting heat exchanger surfaces, and verifying all piping for leaks. The SMART SYSTEM Control Module also incorporates a service reminder notification, making proactive upkeep straightforward and efficient.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Lochinvar Knight XL KBN400 Boiler, and we answer them below.
