Trap required in condensate line

Air Conditioning and Heat Pumps · Refrigerant · printed page 220 (PDF page 221)

Book index entries

Trap Required in Condensate Line Condensate – Line Requires Trap in Air Conditioning Trap Required in Condensate Line for Air Conditioning Air Conditioning – System Condensate – System for Air Conditioning

Text in the illustration

if the condensate drain line is under negative pressure (e.g., upstream of blower - as shown here) a trap is required
air filter
evaporator coil
return air
electric heating elements
suction line
liquid line
condensate line
supply air
blower
trap
4"
2"

Generated explanation

A cutaway air handler shows return air entering through an air filter and evaporator coil before reaching the blower and electric heating elements, then exiting as supply air. Refrigerant suction and liquid lines connect to the evaporator coil. A condensate drain line leaves the coil area and drops into a trap, highlighted in an enlarged circular detail with 4-inch and 2-inch vertical dimensions. The annotation states that a trap is required when the condensate drain is under negative pressure, as in this arrangement with the coil upstream of the blower.

Components

air handler air filter evaporator coil blower electric heating elements refrigerant suction line refrigerant liquid line condensate drain line condensate drain trap

Materials

sheet metal

Related illustrations

1240

Auxiliary condensate line from attic evaporator coil

· p. 219

The illustration shows an attic evaporator coil housing connected to return and supply ductwork, with arrows indicating airflow through the unit. A trapped primary condensate line drains the unit's internal condensate tr