Patterson-Kelley TBIG-03 - Manual (Page 3)

Introduction
Warning!
This boiler requires VAPORIZED propane or natural gas. Under
NO CIRCUMSTANCES may liquid fuel of any kind be introduced in
the boiler.
natural gas
connection
and shutoff
propane
connection
and shutoff
Figure 1-1 Twin-Fuel Gas Train
(Shows 1500/1700/1900 Series; refer to Figure 5-1 for 700/900/1200 Series)
1.0 I NTRODUCTION
The twin-fuel option for the Patterson-Kelley Gem-
ini™ gas-fired boiler allows the boiler to be fired by
propane in the event that the supply of natural gas is
temporarily interrupted or restricted. The necessary
fittings, valves, piping, and controls for twin-fuel op-
eration are factory installed.
This document is a companion to the “Installation and
Owner’s Manual - TBIG” for the standard Thermific
â
boiler. Both documents must be used together. This
companion document describes those safety, installa-
tion, adjustment, and maintenance procedures which
differ from the single-fuel model. Information which
applies to both models is found in the main manual.
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