User Guide

Page 32
FIGURE 51
ML193UH 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 52
ML193UH 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)
IMPORTAN
T
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 53
ML193UH 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