Typical Air Intake Pipe Connections - Lennox G51MP Unit Information

TYPICAL AIR INTAKE PIPE CONNECTIONS

HORIZONTAL DIRECT VENT APPLICATIONS
(Horizontal Right−Hand Air Discharge Application Shown)
G51MP−24B−045
G51MP−36B−045
G51MP−36B−070
*Limit pipe
G51MP−36C−090
length to 2" in
G51MP−48C−090
G51MP−110
G51MP−60C−090
and −135
G51MP−48C−110*
applications.
G51MP−60C−110*
G51MP−60D−135*
G51MP−24B−045
G51MP−36B−045
G51MP−36B−070
G51MP−36C−090
G51MP−48C−090
G51MP−60C−090
G51MP−48C−110*
G51MP−60C−110*
G51MP−24B−045
G51MP−36B−045
G51MP−36B−070
G51MP−36C−090
G51MP−48C−090
G51MP−60C−090
G51MP−48C−110
G51MP−60C−110
FIGURE 23
PLUG
(Must be
glued in
place)
2−1/2",
3" OR 4"
REDUCER
2"*
2−1/2",
3" OR 4"
2"*
2"
TRANSITION
2"*
2"
2"
2"
TYPICAL AIR INTAKE PIPE CONNECTIONS
DOWNFLOW NON−DIRECT VENT APPLICATIONS
(Right−Hand Exit in Downflow Applications Shown)
6 in. Max.
INTAKE DEBRIS
SCREEN
(Provided)
Downflow
Evaporator
Coil
FIGURE 25
Follow the next three steps when installing the unit in Non-
Direct Vent applications where combustion air is taken
from indoors and flue gases are discharged outdoors.
TYPICAL AIR INTAKE PIPE CONNECTIONS
UPFLOW OR HORIZONTAL NON−DIRECT
(Right−Hand Exit in Upflow Application Shown)
PLUG
(Must be
glued in
place)
NOTE − Debris screen and elbow may be rotated, so that
screen may be positioned to face forward, backward or
downward.
PLUG
(Must be
glued in
place)
NOTE − Debris screen and sweep ell may be rotated, so that
screen may be positioned to face forward, backward or to the side.
Page 26
VENT APPLICATIONS
6 in. Max.
FIGURE 24
2" SWEEP
ELL
2"
2" SWEEP ELL
Downflow Additive Flloor Base
INTAKE
DEBRIS
SCREEN
(Provided)
INTAKE
DEBRIS
SCREEN
(Provided)
18 in.