Webster JB Series Installation, Startup, Operation And Maintenance Manual page 27

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Field Piped
Pilot Manual
Ball Valve
Gas Pressure
Regulator
Manual Ball
Valve
Gas
Supply
FM Modulation Gas Piping Diagram - Over 12,500 MBH Firing Rate
JB Manual
Pilot Gas
Pilot Solenoid
Pressure
Valve
Regulator
S
Normally Open
Vent
Vent To Outside
Vent Valve
Atmosphere
Main Motorized
Main Motorized
Gas Valve
W/POC - 14 sec.
M
S
L
POC
Manual
Man Reset Low Gas
Test Valve
Pressure Switch
Vent
Man Reset High
Gas Pressure
Gas Valve
Switch
W/POC
14 sec.
Manual Ball
M
Valve
H
POC
Manual Test
Field Piped
Valve
Page 27
Gas Pilot
Ignitor
Fuel Flow
Test
Connection
Control
Valve
Gas Burner
Manifold
Fuel Systems
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