Nortec Gas-fired Humidifier Installation, User & Maintenance Manual page 25

The table below lists the outlet pressure of the gas
valve under different conditions. This table should be
used as a guide when servicing/troubleshooting the
unit. The actual measured manifold pressure should
fall within the range shown.
Maximum Vent Minimum Vent
Length length
(70 ft. 21m)
Maximum firing
-0.62" W.c. -0.40" W.c.
rate
Minimum firing -0.25" W.c. -0.15" w.c.
rate
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