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IMPORTANT
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.
FIGURE 40
HorizontalFurnace4” Min. to 5” Max.above
condensatedrain connection)
FurnaceCondensate
DrainConnection
From Evaporator Coil
Optional
Condensate Trap With Optional Overflow Switch
FIGURE 41
SLP98UHV with Evaporator
Coil Using a Common Drain
(1” min. to 2” Max.above
condensatedrain connection)
Condensate
DrainConnection
Evaporator drain
line required
FIGURE 42
SLP98UHV with Evaporator Coil Using a Common Drain
(Unit shown in horizontal left
−
hand discharge position)
Condensate Drain
Connection
(4” min. to 5” Max.above
condensatedrain connection)
5’ max.
PVC Pipe Only
4”min
5”max
Evaporator
Coil
Drain Pan
Piping from furnace and evaporator coil must slope down a minimum 1/4" per ft. toward trap
