Greenheck-fan VSU Make-Up Air Unit with Direct-Fired Gas Heater Manual de usuario Pagina 34

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34
Model VSU Make-Up Air
®
Typical Gas Train Layout with Direct Spark Ignition
This is a typical gas train. The gas train in your unit may be different.
Reference
Burner Differential
Pressure Sensor
(Airflow Switch)
Modulating
Valve
to Burner
Combination Shut-Off
Valve/Regulator
Low Gas Pressure
Switch (optional)
Low Gas Pressure
Test Port
Gas Connection
High Gas Pressure
Test Port
Burner Manual
Shut-Off Valve
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