Air Handler Static Pressure Readings; Single Piece Air Handler External Static Pressure; Two Piece Air Handler External Static Pressure - Daikin ComfortNet DX16TC Series Service Instructions Manual

SERVICING

Air Handler Static Pressure Readings

S-203 Single Piece Air Handler External Static
Pressure
To determine proper airflow, proceed as follows:
1. Using a Inclined Manometer or Magnehelic gauge , mea-
sure the static pressure of the return duct at the inlet of
the air handler, this will be a negative pressure ( for exam-
ple -.30"wc)
2. Measure the static pressure of the supply duct at the out-
let of the air handler, this should be a positive pressure (for
example .20"wc).
3. Add the two readings together (for example -.30"wc +
.20"wc = .50"wc total external static pressure.
NOTE: Both readings may be taken simultaneously and read
directly on the manometer if so desired.
4. Consult proper air handler airflow chart for quantity of air
(CFM) at the measured external static pressure.
Supply Static
+.20"wc
S-203A Two Piece Air Handler External Static
To determine proper airflow, proceed as follows:
1. Using a Inclined Manometer or Magnehelic gauge, mea-
sure the static pressure between the outlet of the evap-
orator coil and the inlet of the air handler, this will be a
negative pressure ( for example -.30"wc)
2. Measure the static pressure of the supply duct at the
outlet of the unit, this should be a positive pressure (for
example .20"wc).
3. Add the two readings together (for example -.30"wc +
.20"wc = .50"wc total static pressure.
NOTE: Both readings may be taken simultaneously and read
directly on the manometer if so desired.
4. Consult proper air handler airflow chart for quantity of air
(CFM) at the measured external static pressure.
Return Static
-.30"wc
96
Pressure