LGB-6 to LGB-20Series 2 – Control Supplement

VI Leak test procedure

1.Remove red (MV) and blue (PV) wires from main gas valve.

2.Close main test firing valve attached to the manifold.

3.Check that both leak test valves are closed and remove plugs.

4.Attach manometer to first leak test valve.

5.Open first leak test valve and check for pressure.

6.Close first leak test valve and remove manometer.

7.Attach manometer to second leak test valve.

8.Apply call for heat to boiler.

9.Check that electronic pilot proves.

10.Open second leak test valve and check for pressure.

11.Close second leak test valve and remove manometer.

12.Remove call for heat to boiler.

13.Reinstall plugs on leak test valves.

14.Connect wiring to main gas valve.

15.Open main test firing valve attached to the manifold.

When checking for pressure at the leak test valves, any small pressure reading is normal. If the pressure continues to increase after opening the leak test valve, the upstream valve is leaking and should be replaced.

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Part Number 550-141-816/0798

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Weil-McLain 6-20 Series operating instructions VI Leak test procedure
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6-20 Series specifications

The Weil-McLain 6-20 Series is designed to meet the heating needs of residential and commercial properties with exceptional efficiency and reliability. This versatile steam and hot water boiler series is known for its robust construction and innovative technologies, making it a preferred choice among heating professionals.

One of the main features of the 6-20 Series is its durable cast iron construction, which ensures longevity and superior performance. The cast iron sections provide excellent heat retention, allowing the boiler to efficiently transfer heat to the water or steam, thus enhancing overall energy efficiency. The design is optimized to withstand high pressure and temperature, making it exceptionally resilient under demanding conditions.

Efficiency is at the heart of the 6-20 Series, with models designed to achieve high Annual Fuel Utilization Efficiency (AFUE) ratings. These efficiencies are made possible through advanced combustion technology and smart controls that monitor and adjust the heating process based on real-time needs. This not only conserves fuel but also reduces greenhouse gas emissions, supporting environmentally-friendly heating solutions.

Another significant advancement in the Weil-McLain 6-20 Series is its integrated control system. The advanced boiler control features programmable settings that allow users to customize their heating cycles, enabling better management of energy consumption and operational costs. Furthermore, the boiler comes equipped with a state-of-the-art burner system that ensures clean and efficient combustion, contributing to reduced maintenance needs.

The 6-20 Series also prioritizes user-friendliness, with installation and maintenance simplified through thoughtful engineering. Its compact design allows for flexibility in placement, whether in basements, mechanical rooms, or other areas with limited space. The high-quality insulation minimizes heat loss, further enhancing efficiency and performance.

Safety features are robust in the Weil-McLain 6-20 Series, ensuring peace of mind for homeowners and building managers. Integrated safety controls help monitor the pressure and temperature levels, preventing potentially hazardous situations and ensuring optimal operation.

In conclusion, the Weil-McLain 6-20 Series stands out with its combination of rugged construction, leading-edge technology, and user-oriented design. Whether for residential or commercial applications, its efficient performance and commitment to safety make it a reliable choice for heating solutions.
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