Gaseous Fuel Systems
28 Installation Guidelines for Spark-Ignited Stationary Emergency Generators
2. Cranking Pressure. Pressure when the unit is cranking. Must not drop more than 1 in. w.c. below Static Pres-
sure or below the minimum pressure listed in the unit specification sheet. If it does, it may indicate that fuel sup-
ply piping is not correctly sized, or that primary regulator is improperly sized or mounted too close to the
generator connection point. The unit may experience hard starting, or will not perform as expected at full load or
during load transients.
3. Running- No Load Pressure. Pressure when the unit is running at rated frequency and voltage with no load.
Should be at or slightly below the maximum pressure as listed in the unit specification sheet.
4. Running- Full Load Pressure. Pressure when the unit is running with full rated load applied (kW). Pressure
should not drop more than 1-2 in. w.c. from the Running- No Load Pressure and must NEVER drop below the
minimum pressure listed in the unit specification sheet.
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