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FIGURE 49
ML193UHE with Evaporator Coil Using a Separate Drain
(Unit shown in horizontal left-hand discharge position)
.
5’ max.
PVC Pipe Only
4”min
5”max
Evaporator
Coil
Drain
Pan
Condensate
DrainConnection
Field Provided Vent
(4” min. to 5” max. above
condensate connection)
*Piping from furnace and evaporator coil must
slope down a minimum 1/4” per ft. toward trap
(Trap at coil is optional)
FIGURE 50
ML193UHE with Evaporator
Coil Using a Common Drain
(1” min. to 2” Max.above
condensate drain connection)
Condensate
DrainConnection
Evaporator drain
line required
(Trap at coil is optional)
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 51
ML193UHE with Evaporator Coil Using a Common Drain
(Unit shown in horizontal left−hand discharge position)
(4” min. to 5” Max.above
condensate drain connection)
5’ max.
PVC Pipe Only
4”min
5”max
Evaporator
Coil
Drain
Pan
(Trap at coil is optional)
Condensate
DrainConnection
*Piping from furnace and evaporator coil must
slope down a minimum 1/4” per ft. toward trap
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