Lennox EL195UHNE Series Manual page 36

Furnace with Evaporator
Coil Using a Common Drain
(Trap at coil is optional)
(1" min. to 2" Max.above
condensatedrain connection)
Condensate
Drain Connection
FIGURE 49
(Trap at coil is optional)
Drain Pan
Evaporator drain
line required
Furnace with Evaporator Coil Using a Common Drain
(Unit shown in horizontal left−hand discharge position)
Evaporator
Coil
Condensat e Drai n
Connection
Piping from furnace and evaporator coil must slope
down a minimum 1/4" per ft. toward trap
When combining the furnace and evaporator coil
drains together, the A/C condensate drain outlet
must be vented to relieve pressure in order for the
furnace pressure switch to operate properly.
4"min
5"max
5' max.
PVC Pipe Only
FIGURE 50
Page 36
IMPORTANT
(4" min. to 5" Max.above
condensatedrain connection)