Weil-McLain LGB User Manual

LGB
Boiler Manual
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Series 2
Gas–Fired Boiler
Refer to
Control Supplement
for additional information
Read all instructions before installing
Installer Leave all instructions with boiler for future reference.
Any claims for damage or shortage in shipment must be filed immediately
against the transportation company by the consignee.
Owner Installation and service should be performed by qualified contractor.
Part No. 550-141-186/0914

Weil-McLain LGB Specifications

General

Heat Exchanger Material	Cast Iron
Model	LGB
Manufacturer	Weil-McLain
Fuel Type	Natural gas or propane
Input Capacity Range	70, 000 - 299, 000 BTU/hr
Application	Residential
Ignition Type	Electronic
Heating Capacity	70, 000 - 299, 000 BTU/hr

Summary

General Installation Guidelines

Safety and Hazard Information

Hazard Symbols and Definitions

Explains warning symbols and their meanings.

Material and Chemical Precautions

Pre-installation Venting Requirements

Chimney and Vent Installation Standards

Guides on proper installation of chimney or vent.

Boiler Assembly - Base Components

Base Assembly and Orifice Selection

Steps for assembling the base and correct orifice usage.

Burner Seating and Alignment

Boiler Assembly - Section Joining

Section Assembly and Sealing

Guidance on joining boiler sections and ensuring gas-tight seals.

Boiler Assembly - Sectional Alignment

Draw Rod Tightening and Plumb Checks

Procedures for tightening draw rods and ensuring section alignment.

Gas-Tight Seal Verification

Critical checks to ensure the boiler is gas-tight.

Boiler Assembly - Hydrostatic Testing

Hydrostatic Pressure Test Procedure

Steps for conducting the hydrostatic pressure test.

Safety During Pressure Testing

Warnings and precautions for unattended testing.

Boiler Assembly - Pressure Test Follow-up

Leak Repair and Chemical Safety

Instructions for repairing leaks and avoiding hazardous chemicals.

Water Boiler Piping Installation

Water Piping Connections

Instructions for connecting water piping to the boiler.

Steam Boiler Piping Installation

Steam Piping Connections

Instructions for connecting steam piping to the boiler.

Multiple Steam Boiler Piping

Piping Diagram for Multiple Boilers

Boiler Control Installation

Water Boiler Control Setup

Steam Boiler Control Setup

Boiler Control Installation Details

Steam Boiler Control Component Diagrams

Final Adjustments - Water Boilers

Final Adjustments - Steam Boilers

Boiler Operation Startup Procedure

Initial Boiler Startup Steps

Step-by-step guide for initial boiler startup.

Propane Gas Safety During Startup

Boiler Check-out and Verification

Pre-Operation Checks and Testing

Checklist for verifying proper installation and function.

Maintenance - Safety Precautions

General Servicing Safety Procedures

Essential safety steps before performing maintenance.

Material Handling and Environmental Safety

Maintenance - Seasonal Schedule

Seasonal Maintenance Tasks

Recommended maintenance activities by season.

Maintenance - Operational Checks

Base Insulation and Burner Flame Inspection

Maintenance - Cleaning and Shutdown

Venting System Inspection and Cleaning

Burner and Heating Surface Cleaning