Webster JB Series Installation, Startup, Operation And Maintenance Manual page 24

722001
Field Piped
Pilot Manual
Ball Valve
Vent To Outside
Manual Ball
Valve
Gas
Supply
Gas Pressure
Regulator
UL-FM Low Fire Start Gas Piping Diagram - Up to 2,500 MBH Firing Rate
722022
Field Piped
Pilot Manual
Ball Valve
Manual Ball
Valve
Gas
Supply
UL-FM Low-Hi-Low Gas Piping Diagram - Up to 2,500 MBH Firing Rate
722003
Field Piped
Pilot Manual
Ball Valve
Manual Ball
Valve
Gas
Supply
Gas Pressure
UL-FM Modulation Gas Piping Diagram - Up to 2,500 MBH Firing Rate
722002
Field Piped
Pilot Manual
Ball Valve
Manual Ball
Valve
Gas
Supply
UL Low Fire Start Gas Piping Diagram - 2,501 to 5,000 MBH Firing Rate
JB Manual
Pilot Gas
Pilot Solenoid
Pressure
Valve
Regulator
S
Atmosphere
Main Solenoid
Gas Valve
S
Manual
Piped
Test Valve
Pilot Gas
Pilot Solenoid
Pressure
Valve
Regulator
Vent To Outside
Atmosphere
Main Solenoid
Gas Valve
S
Gas Pressure
Manual
Regulator
Test Valve
Pilot Gas
Pressure
Pilot Solenoid
Regulator
Valve
S
Vent To Outside
Atmosphere
Main Solenoid
Gas Valve
S
Regulator
Manual Test
Pilot Gas
Pressure Pilot Solenoid
Regulator Valve
Vent To Outside
Main Reset Low
Atmosphere
Gas Pressure
Switch
Main Solenoid
S
L
Gas Pressure
Regulator
Manual Test Valve
Main Motorized
Gas Valve
26 Sec.
M
Field
S
Main Motorized
Gas Valve
26 Sec.
M
Manual Test
Field
Piped
Main Motorized
Gas Valve
26 Sec.
Manual
M
Ball Valve
Manual
Field Piped
Test Valve
Valve
S
Main Motorized
Gas Valve
26 Sec.
Gas Valve M
Main Reset High
Field Piped
Manual
Test
Valve
Page 24
Test
Connection
Manual Ball
Valve
Manual Test Valve
Test
Connection
Manual Ball
Valve Valve
Test
Connection
Fuel Flow
Control Valve
Vent
Field-Piped Test
Connection
H
Gas Pressure
Manual Ball
Switch
Valve
Gas Pilot
Ignitor
Gas Burner
Manifold
722001
Gas Pilot
Ignitor
Gas Burner
Manifold
722022
Gas Pilot
Ignitor
Gas Burner
Manifold
722003
Gas Pilot
Ignitor
Gas Burner
Manifold
722002
Fuel Systems