Page 4 of 7 IOM, Rev. 2, November 2007
Copyright © Greenheck Fan Corporation
C. Control
1. With coils arranged for series airflow, a separate control is required on each bank, or coil, in the
direction of airflow.
2. On high-pressure installations, a two-position steam valve with a face and bypass arrangement is
preferred where modulating control is required.
3. Modulating valves must be sized properly—DO NOT OVERSIZE
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