Webster JB Series Installation, Startup, Operation And Maintenance Manual page 25

722009
Field Piped
Pilot Manual
Ball Valve
Manual Ball
Valve
Gas
Supply
Gas Pressure
Regulator
FM Low Fire Start Gas Piping Diagram - 2,501 to 5,000 MBH Firing Rate
722023
Field Piped
Pilot Manual
Ball Valve
Gas Pressure
Regulator
Manual Ball
Valve
Gas
Supply
UL Low-Hi-Low Gas Piping Diagram - 2,501 to 5,000 MBH Firing Rate
722024
Field Piped
Pilot Manual
Ball Valve
Gas Pressure
Regulator
Manual Ball
Valve
Gas
Supply
FM Low-Hi-Low Gas Piping Diagram - 2,501 to 5,000 MBH Firing Rate
722004
Field Piped
Pilot Manual
Ball Valve
Manual Ball
Valve
Gas
Supply
UL Modulation Gas Piping Diagram - 2,501 to 5,000 MBH Firing Rate
JB Manual
Pilot Gas
Pressure
Pilot Solenoid
Regulator
Valve
S
Vent To Outside
Man Reset Low
Atmosphere
Gas Pressure
Switch
Main Motorized
Gas Valve
M
L
14 Sec.
Manual Test
Valve
Pilot Gas
Pilot Solenoid
Pressure
Valve
Regulator
S
Vent To Outside
Atmosphere
Main Solenoid
Gas Valve
S
L
Man Reset
Low Gas
Manual
Pressure
Test Valve
Switch
Pilot Gas
Pilot Solenoid
Pressure
Valve
Regulator
S
Vent To Outside
Atmosphere
Main Motorized
Gas Valve
14 sec.
M
L
Man Reset
Low Gas
Manual
Pressure
Test Valve
Switch
Pilot Gas
Pressure
Pilot Solenoid
Regulator
Valve
S
Vent To Outside
Atmosphere
Man Reset Low
Gas Pressure
Switch
S
L
Gas Pressure
Regulator
Manual Test
Main Solenoid
Gas Valve
Main Motorized
Gas Valve
26 Sec.
M
Field Piped
Manual
Test Valve
Main Motorized
Gas Valve
26 Sec.
M
Manual Test
Field
Piped
Main Motorized
Gas Valve
26 Sec.
M
Manual Test
Field
Piped
Main Motorized Vent Man Reset High
Gas Pressure
Gas Valve
Switch
26 Sec.
Manual
M
H
Ball Valve
Field Piped
Manual
Valve
Test Valve
Page 25
Man Reset High
Gas Pressure
Switch
Vent
Test
Field
Connection
Piped
H
Manual Ball
Valve
Man Reset
High Gas
Vent Pressure
Switch
Test
Connection
Field
H Piped
Manual Ball
Valve
Valve
Man Reset
High Gas
Vent Pressure
Switch
Test
Connection
Field
H Piped
Manual Ball
Valve
Valve
Test
Connection
Fuel Flow
Control Valve
Gas Pilot
Ignitor
Gas Burner
Manifold
722009
Gas Pilot
Ignitor
Gas Burner
Manifold
722023
Gas Pilot
Ignitor
Gas Burner
Manifold
7722024
Gas Pilot
Ignitor
Gas Burner
Manifold
722004
Fuel Systems