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Weil-McLain LGB-4 Control Supplement

Weil-McLain LGB-4 Control Supplement

Series 2 – natural gas universal control system
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See also: User Manual , Manual
These terms are used throughout this
manual to bring attention to the presence
of hazards of various risk levels or to
important information concerning the life
of the product.
LG
LG B B B B B
LG
LG
LG
Control Supplement
Control Supplement
Control Supplement
Control Supplement
Control Supplement
LGB-4
LGB
LGB
-4
-4 & LGB
-4
LGB
LGB
LGB-5
LGB
LGB
-4
LGB
Universal Control System
Indicates presence of hazards that can cause severe personal injury, death or
substantial property damage.
Indicates special instructions on installation, operation or maintenance that
are important but not related to personal injury or property.
Control Supplement must only be used by a qualified installer/service
technician. Read all instructions before installing. Failure to follow all
instructions in proper order can cause severe personal injury, death or
substantial property damage.
Gas-fired boiler
-5
-5
-5
-5

- Natural gas

Series 2
Contents
Installation ....................... 2
Gas piping ......................... 3
Wiring ............................... 4
for additional information
Part Number 550-141-918/0304
Refer to
LGB • Installation •
LGB
LGB
LGB
LGB
Start-Up • Service •
Parts Manual

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Summary of Contents for Weil-McLain LGB-4

  • Page 1: Natural Gas

    Control Supplement Control Supplement Control Supplement Control Supplement Control Supplement LGB-4 Universal Control System These terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.

  • Page 2: Installation

    Install pilot burner. See Figures 1a and 1b. Follow Figure 1b for pilot burner location, placing the burner with pilot bracket in the fourth position from the left for the LGB-4 and the fifth position from the left for the LGB-5, as shown.

  • Page 3: Gas Piping

    LGB-4 Gas piping Supply pipe sizing 1. Size natural gas piping from Table 1. Size piping to provide proper inlet pressure to gas 2. Size gas piping considering: Connect gas piping 3. Remove knockout disc from jacket panel side to which gas supply will be piped.

  • Page 4: Wiring

    LGB-4 Wiring -4 & 5 5 5 5 5 • Control Supplement • • Nat. Gas Part Number 550-141-918/0304...
  • Page 5 LGB-4 Figure 2 Wiring diagram Part Number 550-141-918/0304 -4 & 5 5 5 5 5 • Control Supplement For your safety, turn off power supply before making electrical connections to avoid possible electrical shock hazard. Label all wires prior to disconnection when servicing controls.

  • Page 6: Operating Instructions

    LGB-4 Operating instructions Starting boiler 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 12. Replace Front Panel. -4 & 5 5 5 5 5 •...

  • Page 7: Verification Testing

    LGB-4 Verification testing Before starting boiler for the first time and at least annually (during annual inspection and start-up), follow the procedures below to verify boiler controls are operating correctly and that automatic gas valve properly shuts off gas flow. Failure to verify boiler operation could result in severe personal injury, death or substantial property damage.

  • Page 8: Parts

    LGB-4 Parts list Figure 3 Control and gas components -4 & 5 5 5 5 5 • Control Supplement • • Nat. Gas Weil-McLain 500 Blaine Street Michigan City, IN 46360-2388 http://www.weil-mclain.com Part Number 550-141-918/0304...

This manual is also suitable for:

Lgb-5

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