Lennox Merit Series Installation Instructions

Page 22
TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN UPFLOW
DIRECT OR NON-DIRECT VENT APPLICATIONS
2”
2”
2”
3”
2”
2”
or
DO NOT transition
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
EXHAUST
* 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.
TRANSITION
2”
1−1/2”
030/045/070 Only
2”
INTAKE
3”
INTAKE
EXHAUST
Exhaust
Exhaust
DO NOT transition
from larger to smaller
pipe in horizontal runs
of exhaust pipe.
Exhaust
6” Min
Figure 25
SIDE VIEW
2”
2”
2”
or
TYPICAL EXHAUST AND INTAKE 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.
TRANSITION
1−1/2”
2”
3”
*2”
*2”
*2”
*2”
INTAKE
2”
2”
or
2”
2”
EXHAUST
INTAKE
030/045/070 Only
Exhaust
DO NOT transition
from larger to smaller
pipe in horizontal runs
of exhaust pipe.
Exhaust
Exhaust
2”
Figure 26

Lennox Merit Series Specifications

General

Efficiency	Up to 80% AFUE
Heating Stages	Single-stage
Fuel Type	Natural Gas or Propane
Ignition System	Hot Surface Ignition
Blower Motor	PSC
Warranty	5-Year Limited Parts Warranty
Heating Capacity	44, 000 to 132, 000 BTU/h