Bryant 355MAV Troubleshooting Manual page 42

RETURN STATIC
INCLINE MANOMETER
ELECTRONIC
AIR CLEANER
AIRFLOW
Horizontal Right and Left Airflow Total Static Pressure Reading Locations
EXAMPLE 1
Return ESP after filter
Supply ESP before coil
Total ESP
Tools Needed:
1) Pitot Tube
1) Incline Manometer/Magnahelic
Both examples are correct. Example 1 ESP readings were taken as
laid out in Static Pressure Reading Location Diagrams. Example 2
readings are taken as described. The coil and filter static pressure
drops were taken from the manufacturer's Product Data Sheets
with the assumption that we are trying to deliver 2000 CFM (this
will vary).
NOTE: By plotting total ESP of 0.95 in. wc on the air delivery
curve of a 100,000 Btuh input furnace, a Fault Code 44 would
flash. (See Example Air Delivery Curve.)
VENT PIPE
FURNACE
CONDENSATE
DRAIN
REFRIGERATION
PIPING
Attic — Horizontal Application
0.40 in. wc
0.55 in. wc
0.95 in. wc
—42—
COMBUSTION–AIR PIPE
AIR CONDITIONING
COIL
Return ESP before filter
Filter Static Drop @ 2000 CFM
Supply ESP after coil
Coil Static Drop Wet
Total ESP
SUPPLY STATIC
INCLINE MANOMETER
EXAMPLE 2
0.15 in. wc
0.25 in. wc
0.30 in. wc
0.25 in. wc
0.95 in. wc
A95092