Weil-McLain LGB-8, LGB-7, LGB-14, LGB-20, LGB-13, LGB-15 New installation, Gas control arrangement

Page 2

LGB-6 to LGB-23Series 2 – Control Supplement

I New installation

1.Remove all burners from base box assembly. Remove 3.95 mm natural gas main burner orifices in manifold. Install 2.40 mm propane gas main burner orifices. Use pipe dope sparingly only on male ends. Use pipe dope compatible with propane gases. Do not overtighten orifices.

2.Install pilot burners and flame sensor(s). See Figures 1 and 2 (page 3). Follow Table 1 for electronic pilot burner (UCS), standing pilot burner (Q327) and flame sensor locations on manifold.

3.Install gas controls and ignition control panel as shown in Table 2, below and either Figure 5 (page 10) or Figure 6 (page 11).

4.Attach pilot switch box to interior jacket panel. See Figure 5 (page 10) or Figure 6 (page 11). Connect thermocouple from standing pilot to switch box. Cut 60” pilot tubing into 2 pieces to make connections from pilot valve to pilot switch box and from pilot switch box to standing pilot.

5.LGB-21 through LGB-23 require High Gas Pressure Switch Control Carton furnished with boilers. Attach pressure switch to interior jacket panel. See Figure 5 (page 10) or Figure 6 (page 11).

6.Attach:

a.550-223-710 label at boiler operating instruction label. Place so that this label reads first.

b. 550-223-796 label at rating label.

c.Wiring diagram on door (one on each base).

d.Canada only - mount rating plate on interior jacket panel.

 

 

 

 

 

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Part Number 550-141-797/0798

Image 2
Contents LGBGas-fired boiler New installation Gas control arrangementPilot burner assembly, typical Main flame sensor assemblyLGB-6 to LGB-23Series 2 Control Supplement IV Wiring III Gas pipingWiring diagram IV Wiring Junction box assembly dual base boilersOperating instructions Starting boilerVI Parts list U.S. boilers Parts drawingVII Parts list Canadian boilers Canadian parts drawingWeil-McLain Blaine Street Michigan City,

LGB-19, LGB-6, LGB-8, LGB-11, LGB-7 specifications

Weil-McLain's LGB series of cast iron boilers, including models LGB-10, LGB-9, LGB-8, LGB-18, and LGB-15, are renowned for their efficiency, durability, and reliable performance in commercial and industrial heating applications. These boilers are designed to meet a broad range of heating demands, making them a popular choice among professionals in the HVAC industry.

One of the main features of the LGB series is its sectional cast iron design. This allows for superior heat retention and efficient heat transfer, ensuring minimal energy loss throughout the heating process. The cast iron construction also provides exceptional durability, allowing these boilers to withstand high operating pressures and prolonging their lifespan compared to other materials.

The LGB series employs an advanced burner system that enhances combustion efficiency. The gas-fired models are equipped with a power burner that ensures precise fuel-to-air ratios, resulting in optimal combustion and reduced greenhouse gas emissions. Additionally, Weil-McLain boilers are designed to operate quietly, making them suitable for use in noise-sensitive environments.

A significant technological advancement in these models includes their electronic ignition systems, which eliminate the need for pilot lights, thereby increasing safety and reducing energy consumption. This technology also contributes to the overall ease of operation. The series features a wide range of firing rates, enabling users to adjust the boiler’s output according to specific heating requirements.

The LGB-10, LGB-9, LGB-8, LGB-18, and LGB-15 models are available with various options such as built-in draft diverters and low water cut-off features to enhance safety and performance. Moreover, these boilers are compatible with different types of heating systems, including hot water and steam applications, making them versatile for a variety of installations.

In terms of efficiency, the Weil-McLain LGB series typically achieves an Annual Fuel Utilization Efficiency (AFUE) rating that meets or exceeds industry standards, ensuring lower operational costs and energy savings for consumers. This combination of features, technologies, and characteristics makes the Weil-McLain LGB series an exceptional choice for those looking for reliable and efficient heating solutions in demanding applications.