M7 NC-4217, Manual

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Ideal system connection:
Piping diameters and length requirement:
The diameter ΦA required for the inlet pipe is recommended on the specification table.
The diameter ΦB required for the branch pipe (from to ) should be 2 times as large as ΦA.
ΦB = 2 x ΦA
The diameter ΦC required for the primary air supply (from to ) should be 3 times as large as
ΦA. ΦC = 3 x ΦA
The length for the inlet pipe should be less than 15 feet (4.5m).