Patterson-Kelley TBIG-03 User Manual

Page of 24
 
 
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. 
 
 
 
- 1 -