Reznor UEAS Unit Installation Manual - Manual (Page 17)

End View
showing Airflow through the
Concentric Adapter Box
Gray Arrows
show Flow of
Combustion Air
Vent (exhaust gas) flows through the
field-supplied 4” Schedule 40 PVC or
CPVC vent pipe that extends straight
through the concentric adapter box.
(Collar for attaching indoor
6” combustion air pipe)
(Collar for attaching outdoor
8” combustion air pipe)
There is a silicone ring around
this opening in the box.
FIGURE 13 - Concentric Adapter Box Airflow
FIGURE 14 - Concentric
Adapter Box
Connections
Concentric Adapter
Box Connections
for a Model UEAS
High Efficiency Heater
“4” diameter CPVC or PVC vent
pipe run that extends through
the box and att
aches to the
condensate drain connection
tee at the heater
.
6” diameter single-wall
inlet air pipe that att
aches
to the box and the heater
.
8” diameter single-wall inlet air pipe that attaches
to the box and is concentric to the 4” vent pipe
that extends through its center.
4” diameter
Schedule 40
CPVC or PVC
vent pipe
Silicone
Sealing
Ring
FIGURE 15 - Is the
Separated-Combustion
Vent/Combustion Air
System Horizontal or
Vertical?
HORIZONTAL OR VERTICAL VENT TERMINAL?
Vertical,
Option CC2,
instructions
begin on
page 21.
Horizontal,
Option CC6,
instructions
begin on
page 18.
Form I-UEAS, P/N 221232 R13, Page 17