Weil-McLain LGB-20 Control Supplement

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.
LGB
Control Supplement
LGB-6 LGB-20
to

- Natural gas

CSD-1 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 damage.
This Control Supplement must only be used by a qualified installer/ser-
vice technician. Read these instructions completely before beginning the
installation. Failure to follow these instructions can cause severe personal
injury, death or substantial property damage.
Gas-fired boiler
Series 2
Contents
I. Installation .................... 2
II. Gas piping ..................... 4
III. Water and steam trim
components
IV. Wiring ............................ 5
Sequence of operation ......8
Wiring procedure ...............8
V. Leak test procedure ... 10
VI. Operating instructions 11
VII. Parts list ...................... 12
Part Number 550-141-815/1010
5
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