Single Piece Air Handler External Static Pressure; S-203A Two Piece Air Handler External; Static Pressure - Goodman ComfortNet ASXC Series Service Instructions Manual

SERVICING
ALUMINUM INDOOR COIL CLEANING
(Qualified Servicer Only)
This unit is equipped with an aluminum tube evaporator coil.
The safest way to clean the evaporator coil is to simply flush
the coil with water. This cleaning practice remains as the
recommended cleaning method for both copper tube and
aluminum tube residential cooling coils.
An alternate cleaning method is to use one of the products
listed in the technical publication TP-109 (shipped in the
literature bag with the unit) to clean the coils. The cleaners
listed are the only agents deemed safe and approved for use
to clean round tube aluminum coils. TP-109 is available on the
web site in Partner Link > Service Toolkit.
NOTE: Ensure coils are rinsed well after use of any chemical
cleaners.
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 ,
measure the static pressure of the return duct at 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 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
100

S-203A TWO 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 between the outlet of the evaporator
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