Lennox EL195UH040NE36B Installation Instructions And Use page 33

Evaporator
(Trap at coil is optional)
Drain Pan
Piping from furnace and evaporator coil must slope down a minimum 1/4" per ft. toward trap
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 53
Evaporator
(Trap at coil is optional)
Drain Pan
Furnace with Evaporator Coil Using a Separate Drain
(Unit shown in horizontal left-hand discharge position)
Coil
Condensate
Drain Connection
Figure 52
Evaporator drain
line required
Furnace with Evaporator Coil Using a Common Drain
(Unit shown in horizontal left−hand discharge position)
Coil
Condensat e Drai n
Connection
Piping from furnace and evaporator coil must slope
down a minimum 1/4" per ft. toward trap
Figure 54
4"min
5"max
5' max.
PVC Pipe Only
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
Page 33
Field Provided Vent
(4" min. to 5" max. above
condensate connection)
.
IMPORTANT
(4" min. to 5" Max.above
condensatedrain connection)