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Model VSU Make-Up Air
®
Reference
Typical Gas Train Layout with Modulating Valve (Pilot Ignition)
High Gas
Pressure Switch
(optional)
Low Gas
Pressure Switch
(optional)
Manual Pilot
Shut-Off Valve
Pilot
Regulator
Pilot
Solenoid
Burner Gas
Pressure
Test Port
Burner Differential
Pressure Sensor
Pilot Gas Pressure
Test Port
Burner Manual
Shut-Off Valve
Modulating
Valve
Safety Shut-Off
Valves
Regulator
Typical Gas Train Layout with Modulating Regulator (Pilot Ignition)
High Gas
Pressure Switch
(optional)
Low Gas
Pressure Switch
(optional)
Manual Pilot
Shut-Off Valve
Pilot
Regulator
Pilot
Solenoid
Burner Gas
Pressure
Test Port
Burner Differential
Pressure Sensor
Pilot Gas Pressure
Test Port
Burner Manual
Shut-Off Valve
Modulating/Regulator
Valve
Safety Shut-Off
Valves