An AHU condensate trap is too shallow and the pan overflows
A draw-through unit can hold water in the pan if the trap does not overcome negative pressure. Verify unit type/static and rebuild the drain trap per manufacturer detail before water damages the cabinet.
The AHU drain pan is overflowing and the trap looks shallow/wrong at [unit]. I checked drain slope and unit type. Do you want the trap rebuilt per the manufacturer detail before restart?
Watch out
Do not copy a generic shallow P-trap detail onto every AHU.
Check
Confirm whether the coil/fan arrangement is draw-through or blow-through.
Check the manufacturer condensate trap detail and required dimensions for the actual unit/static.
Look for shallow trap, missing cleanout, wrong vent location, no slope, blocked drain, or pan outlet issue.
Check for water damage near electrical/control compartments.
Stop/contain water before it damages equipment or ceiling.
Steps
Confirm whether the coil/fan arrangement is draw-through or blow-through.
Check the manufacturer condensate trap detail and required dimensions for the actual unit/static.
Look for shallow trap, missing cleanout, wrong vent location, no slope, blocked drain, or pan outlet issue.
Check for water damage near electrical/control compartments.
Stop/contain water before it damages equipment or ceiling.
Say this to your foreman
The AHU drain pan is overflowing and the trap looks shallow/wrong at [unit]. I checked drain slope and unit type. Do you want the trap rebuilt per the manufacturer detail before restart?