Lennox Merit ML193UH User Manual

Page 30
FIGURE 46
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12” (305 mm) Minimum
Above Grade or Average
Snow Accumulation
1/2” (13 mm)
FOAM INSULATION
(Field−Furnished)
5” (127 mm)
5−1/2”
(140 mm)
EXHAUST
AIR
INTAKE
AIR
GRADE
12”
(305 mm)
INTAKE
AIR
EXHAUST
AIR
GRADE
12” (305 mm) Max. for 2” (51 mm) Dia. Exhaust
20” (508 mm) Max. for 3” (76 mm) Dia. Exhaust
WALL SUPPORT*
12” (305 mm) Max. for 2” (51 mm) Dia. Exhaust
20” (508 mm) Max. for 3” (76 mm) Dia. Exhaust
12” (305 mm) Minimum
Above Grade or Average
Snow Accumulation
WALL TERMINATION KITS (CLOSE−COUPLE)
EXTENDED VENT FOR GRADE CLEARANCE
2 inch (51 mm) 22G44 (US)
3 inch (76 mm) 44J40 (US)
6” (152 mm)
Maximum
8” (203 mm) Min. for 2” (51 mm) & 3” (76 mm) DIA. pipe
between the end of the exhaust pipe and intake pipe
8” (203 mm) Min.
*Use wall support every 24" (610). Use two supports if
extension is greater than 24" but less than 48".
FIELD−PROVIDED
REDUCER MAY BE REQUIRED TO ADAPT
LARGER VENT PIPE SIZE TO TERMINATION
If intake and exhaust pipe is less than 12 in. (305 mm)
above snow accumulation or other obstructions, field−
fabricated piping must be installed.
FIGURE 47
ÉÉÉÉÉÉÉÉÉÉÉÉ
12” (305 mm) Minimum
Above Grade or Average
Snow Accumulation
1/2” (13 mm)
FOAM INSULATION
(Field−Furnished)
5” (127 mm)
5−1/2”
(140 mm)
EXHAUST
AIR
INTAKE
AIR
GRADE
12”
(305 mm)
INTAKE
AIR
EXHAUST
AIR
GRADE
WALL SUPPORT*
12” (305 mm) Minimum
Above Grade or Average
Snow Accumulation
WALL TERMINATION KITS (CLOSE−COUPLE)
EXTENDED VENT FOR GRADE CLEARANCE
2 inch (51 mm) 30G28 (WTK Canada)
3 inch (76 mm) 81J20 (WTK Canada)
See Installation Instructions for additional information.
6” (152 mm)
Maximum
If intake and exhaust pipe is less than 12 in. (305 mm)
above snow accumulation or other obstructions, field−
fabricated piping must be installed.
12” (305 mm) Max. for 2” (51 mm) Dia. Exhaust
20” (508 mm) Max. for 3” (76 mm) Dia. Exhaust
12” (305 mm) Max. for 2” (51 mm) Dia. Exhaust
20” (508 mm) Max. for 3” (76 mm) Dia. Exhaust
6” (152 mm)
Minimum
6” (152 mm)
Minimum
*Use wall support every 24" (610). Use two supports if
extension is greater than 24" but less than 48".
FIELD−PROVIDED
REDUCER MAY BE REQUIRED TO ADAPT
LARGER VENT PIPE SIZE TO TERMINATION
ÉÉÉÉÉÉÉÉÉÉÉ

Lennox Merit ML193UH Specifications

General

Efficiency	Up to 93% AFUE
Heating Stages	Single-stage
Blower Motor	PSC
Gas Valve	Single-stage
Energy Star Certified	No
Fuel Type	Natural Gas or Propane
Cabinet Type	Upflow/Horizontal
Ignition Type	Hot Surface Ignition
Heat Exchanger	Aluminized Steel
Heating Capacity	44, 000-132, 000 BTU/h