LGB-4 & 5 • Control Supplement • UCS • Nat. Gas

IV Operating instructions

Starting boiler

A.This boiler is equipped with an ignition device which automatically lights the pilot. Do not try to light the pilot by hand.

B.BEFORE OPERATING, smell all around the boiler area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

•Do not try to light any appliance.

•Do not touch any electric switch; do not use any phone in your building.

•Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.

•If you cannot reach your gas supplier, call the fire department.

C.Use only your hand to turn the gas control knob. Never use tools. If the knob will not turn by hand, don't try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.

D.Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control, which has been under water.

1.STOP! Read the safety information above.

2.Set the thermostat to lowest setting.

3.Turn off all electrical power to the appliance.

4.Remove Front Panel.

5.This appliance is also equipped with an ignition device which automatically lights the second pilot. Do not try to light this pilot by hand.

6.Close the firing valve and turn the Gas Control knob clockwise to "OFF."

7.Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow "B" in the safety information above. If you don't smell gas, go to the next step.

8.Turn Gas Control knob counterclockwise to "ON,”then open the firing valve.

9.Turn on all electric power to the appliance.

10.Set thermostat to desired setting.

11.If the appliance will not operate, close the firing valve and turn off gas to the boiler by rotating the Gas Control knob clockwise to “OFF.” Turn off all electrical power. Call your service technician or gas supplier.

12.Replace Front Panel.

6

Part Number 550-141-918/0304

Page 5 Page 7
Page 6
Image 6
Weil-McLain LGB-5, LGB-4 operating instructions IV Operating instructions, Starting boiler
Page 5 Page 7

LGB-5, LGB-4 specifications

Weil-McLain has long been a respected name in the heating industry, known for their commitment to quality and efficiency. Among their impressive product line, the LGB-4 and LGB-5 steam boilers stand out as reliable choices for commercial and industrial heating applications. These boilers are designed to deliver efficient performance while maintaining ease of installation and operation.

The Weil-McLain LGB-4 and LGB-5 are cast iron steam boilers, with a robust design that ensures durability and longevity. The LGB-4 has a firing range of 175 to 600 MBH (thousands of BTUs per hour), making it suitable for medium to large heating loads. The LGB-5, on the other hand, offers a firing range of 300 to 1,200 MBH, catering to larger industrial applications. This versatility allows for a wide range of configurations, making the boilers suitable for various applications in commercial buildings, schools, and healthcare facilities.

One of the prominent features of the LGB series is its Modular Design. This design allows for multiple boilers to be linked together to provide efficient heating for larger buildings. By employing multiple heating units, the system can respond more effectively to varying heating demands, resulting in reduced energy consumption and increased efficiency.

Energy efficiency is a standout characteristic of the LGB-4 and LGB-5. Both models are designed with advanced combustion technology, ensuring optimal fuel utilization and lower emissions. The cast iron construction not only provides durability but also excellent thermal mass, helping to maintain steady temperature control while reducing fuel costs. The optional low-NOx burners further minimize environmental impact, adhering to stringent emissions regulations.

Another innovative feature is the built-in venting options that allow for flexibility in installations. These boilers can be vented vertically or horizontally, providing versatile installation choices that can adapt to existing infrastructure.

The user-friendly control panel with integrated diagnostic capabilities simplifies operation and maintenance. Features such as a standard electronic ignition system reduce manual intervention, and the modulating burner promotes more precise control of the steam output.

In summary, the Weil-McLain LGB-4 and LGB-5 steam boilers provide a combination of durability, efficiency, and flexibility. With their modular design, advanced combustion technologies, and user-friendly controls, these boilers are well-suited for a variety of commercial and industrial heating needs, ensuring reliable performance and peace of mind for building managers and facility operators.
Top Page Image Contents