Air Pressure Switches (FM approved) to be in purge circuit

Motor Starter Interlocks
to be in purge circuit

1 Approved Safety Valve
Solenoid or Motorized (Recommend with position indicator), FM approved

1 Pilot Sol Valve (if piloted)
FM approved

1 High Gas Pressure Switch

1 Low Gas Pressure Switch

1 Over Temperature Control

1 Purge Timer

Air Pressure Switches (FM approved) to be in purge circuit

Motor Starter Interlocks
to be in purge circuit

2 Solenoid Safety Valves in series, each with indication

1 Pilot Sol Valve (if piloted)
FM approved

1 High Gas Pressure Switch

1 Low Gas Pressure Switch

1 Over Temperature Control

1 Purge Timer

Air Pressure Switches (FM approved) to be in purge circuit

Motor Starter Interlocks
to be in purge circuit

1 Approved Safety Valve
Solenoid or Motorized (Recommend with position indicator), FM approved

1 Pilot Sol Valve (if piloted)
FM approved

1 High Gas Pressure Switch

1 Low Gas Pressure Switch

1 Over Temperature Control

2 Main Safety Valves with position indicator
* 1 valve having proof of closure

1 Purge Timer

Air Pressure Switches (FM approved) to be in purge circuit

Motor Starter Interlocks
to be in purge circuit

1 Approved Safety Valve
Solenoid or Motorized (Recommend with position indicator), FM approved

1 Pilot Sol Valve (if piloted)
FM approved

1 High Gas Pressure Switch

1 Low Gas Pressure Switch

1 Over Temperature Control

2 Main Safety Valves with position indicator
* 1 valve having proof of closure

1 Purge Timer

1 Fuel Strainer