Lennox ML193UH Installation Instructions

Page 31
FIGURE 49
Furnace with Evaporator
Coil Using a Common Drain
(1” min.to2” Max.above
condensatedrain connection)
Condensate
Drain
Connection
Evaporator drain
line required
(Trap at coil is optional)
FIGURE 50
IMPORTANT
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.
Furnace with Evaporator Coil Using a Common Drain
(Unit shown in horizontal left−hand discharge position)
Condensate Drain
Connection
(4” min.to5” 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
(Trap at coil is optional)
FIGURE 51
Furnace 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)

Lennox ML193UH Specifications

General

Efficiency	93% AFUE
Heating Stages	Single-stage
Blower Motor	PSC
Energy Star Certified	No
Gas Valve	Single-stage
Ignition System	Hot Surface Ignition
Blower Motor Type	PSC
Ignition Type	Hot Surface Ignition
Fuel Type	Natural Gas or Propane
Warranty	5-Year Limited Warranty on covered components
Stages of Heat	Single-stage
Heating Capacity	44, 000-132, 000 BTU/h