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Table 15: Minimum Vacuum
4. Stop boiler, remove manometer and reconnect hose
to pressure switch. See Figure 24.
Figure 24: Inlet Fan Vacuum Measurement
Figure 25: L404F Pressuretrol
Boiler
Model
Minimum Vacuum
PIN3PV -0.40 inches w.c.
PIN4PV -0.40 inches w.c.
PIN5PV -0.70 inches w.c.
PIN6PV -0.70 inches w.c.