Lennox Merit ML193UH User Manual

Page 19
FIGURE 24
TYPICAL EXHAUST PIPE CONNECTIONS IN UPFLOW DIRECT OR
NON−DIRECT VENT APPLICATIONS
TRANSITION
2”
2”
2”
3”
2”
2”
or
Pipe size determined in table 5
DO NOT transition
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
EXHAUST
*2”
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE − Exhaust pipe and intake pipe must be the same diameter.
or
FIGURE 25
TRANSITION
SIDE VIEW
2”
2”
2”
2”
or
TYPICAL EXHAUST PIPE CONNECTIONS IN HORIZONTAL DIRECT OR
NON−DIRECT VENT APPLICATIONS
(RIGHT HAND DISCHARGE SHOWN)
3”
2”
45°
MAX
45°
MAX
DO NOT transition
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
EXHAUST
12" max.
*2”
*2”
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE − Exhaust pipe and intake pipe must be the same diameter.

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