Near boiler piping connections

Outdoor Knight XL Installation & Operation Manual

3 Hydronic piping (continued)

12. Boiler purge valve:

Field supplied. The boiler purge valve is used to

Figure 3-4BNear Boiler Piping w/Low Loss Header

remove entrapped air from the heat exchanger during

start-up.

13. System temperature sensor:

Lochinvar supplies a system temperature sensor. The

sensor is to be installed in the heating loop downstream

from the boiler hot water piping and heating loop

junction. The sensor should be located far enough

SYSTEM PUMP

SYSTEM SENSOR

AIR SEPARATOR

DRAIN (TYPICAL)

AIR VENT VALVE

LOW LOSS HEADER (TYPICAL)

			O	M
			O	E
		T		ST
			Y
			S
	M		M
	O		M
R		E
F		T
	S
	Y
S

FAST FILL VALVE

EXPANSION TANK

downstream to sense system diluted water temperature.

14. Y-Strainer:

Field supplied. A Y-strainer or equivalent multipurpose

strainer is recommended at the inlet of the heat exchanger

to remove system particles from older hydronic systems

and protect newer systems.

Circulator sizing

The Outdoor Knight XL heat exchanger does have a pressure drop, which must be considered in your system design. Refer to the graphs in FIG’s 3-5 and 3-6 for pressure drop through the Outdoor Knight XL heat exchanger.

		INDIRECT
DRAIN	O	DOMESTIC
VALVE	M	HOT WATER
VALVE	F	HOT WATER
	R
	O	TANK
	O
	T

Y-STRAINER (RECOMMENDED)

BOILER PUMP

IMG00391

Figure 3-4ANear Boiler Piping w/Y-Strainer

TO FLOOR

DRAIN

SYSTEM SENSOR

AIR SEPARATOR

SYSTEM PUMP

Y-STRAINER (RECOMMENDED)

BOILER PUMP

	M		M
	O		M
R		E
F		T
	S
	Y
S

DOMESTIC HOT

WATER PUMP

INDIRECT

DOMESTIC HOT WATER TANK

Variable speed pump option

Variable speed pump setup

Before operation, ensure the following:

-Pump is set for an input signal of 0 - 10VDC by the dip switches on the pump control

-Pump is set for external signal control (if applicable)

-Pump is set for linear output (if applicable)

-If pump does not come equipped with a 0 - 10 VDC input option, an optional module will be required from the vendor

SMART SYSTEM / Multi-temperature loop control option

IMG00413

TO FLOOR

DRAIN

The Outdoor Knight XL boiler is capable of producing up to three (3) set point temperatures to meet different space heating demands. When using more than one temperature demand it is necessary to protect the lower temperature loop from overheating. To help aid with this protection, Lochinvar offers the Multi- Temperature Loop Control Board Kit (RLY30086).

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 Near boiler piping connections, Circulator sizing, Variable speed pump option