Lennox EL296UHE Installation Instructions Manual page 36

Evaporator
Drain Pan
Piping from furnace and evaporator coil must slope down a minimum 1/4" per ft. toward trap
EL296UHE with Evaporator
Coil Using a Common Drain
(1" min. to 2" Max.above
condensate drain connection)
Condensate
Drain Connection
FIGURE 57
Evaporator
Drain Pan
Piping from furnace and evaporator coil must slope down a minimum 1/4" per ft. toward trap
EL296UHE with Evaporator Coil Using a Separate Drain
(Unit shown in horizontal left-hand discharge position)
Coil
Condensate
Drain Connection
Evaporator drain
line required
EL296UHE with Evaporator Coil Using a Common Drain
(Unit shown in horizontal left−hand discharge position)
Coil
Condensat e Drai n
Connection
4"min
5"max
5' max.
PVC Pipe Only
FIGURE 56
When combining the furnace and evaporator
coil drains together, the A/C condensate drain
outlet must be vented to relieve pressure in or­
der for the furnace pressure switch to operate
properly.
4"min
5"max
5' max.
PVC Pipe Only
FIGURE 58
Page 36
Field Provided Vent
(4" min. to 5" max. above
condensate connection)
.
IMPORTANT
(4" min. to 5" Max.above
condensate drain connection)