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Part Number 550-141-807/02984
LGB
(Series 2) — Control Supplement
1613 15
1718
18
14
12
11
10
9
7
6
5
4
3
2
1
Boiler Jacket
Vent to Outside
Atmosphere
Drip Leg Service Valve
9
Second motorized gas valve w/ on/off actuator
1
Manual main shut-off gas valve
2
Low gas pressure switch
3
Pilot manual shut-off valve
4
Motorized gas valve w/ on/off actuator
5
Pilot gas pressure regulator
6
Normally open solenoid vent valve
7
Pilot solenoid gas valve
8
Test cock
10
Manual leak checking gas valve
11
Regulating diaphragm gas valve (two stage)
12
High gas pressure switch
13
Main flame sensor
14
Main burner with main flame sensor bracket
15
Pilot burner
16
Main burner with pilot burner bracket
18
Pipe flanges
17
Adapter, for N. O. vent valve
GAS PIPING DIAGRAM - LGB (Series 2)
IRI Gas Train
8
I Installation – continued
Figure 4
IRI gas train schematic