SERVICING
50
S-204 COIL STATIC PRESSURE DROP
1. Using a draft gauge (inclined manometer), connect the posi-
tive probe underneath the coil and the negative probe above
the coil.
2. A direct reading can be taken of the static pressure drop across
the coil.
3. Consult proper table for quantity of air.
STATIC PRESSURE DROP
If the total external static pressure and/or static pressure drop
exceeds the maximum or minimum allowable statics, check for
closed dampers, dirty filters, undersized or poorly laid out duct
work.
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