Vent System Options - A.O. Smith 400 - 2100 Installation & Operation Manual

2
Venting
(continued)

Vent system options:

This option uses a vertical rooftop flue termination
A
with air supplied from the equipment room - see
page 17.
CONVENTIONAL NEGATIVE
DRAFT VENTING
This option uses a vertical conventional vent for
B
flue products with air supplied by a pipe from the
sidewall or rooftop - see page 20.
VERTICAL VENT/DUCTED AIR
This option uses a powered vent assembly
C
to exhaust the flue products out a sidewall
vent termination with air supplied from the
equipment room - see page 23.
SIDEWALL/POWER VENTING
NOTE: CAT I B-VENT MATERIALS MAY BE USED WHEN THE
POWERED VENT IS CONNECTED DIRECTLY TO THE OUTSIDE
VENT CAP. IF THE POWERED VENT IS NOT CONNECTED
DIRECTLY TO THE OUTSIDE VENT CAP, THEN CAT IV - AL29-4C
VENT MATERIALS MUST BE USED FROM THE POWERED VENT
TO THE OUTSIDE VENT CAP.
(Note: Installations shown below are representative, actual installations may vary from those shown.)
SIDEWALL/POWER VENTING/
DUCTED AIR
IMG00580
IMG00583
OUTDOOR VENTING
Installation & Operation Manual
This option uses a powered vent assembly to
D
exhaust the flue products out a sidewall with air
supplied by a pipe from the sidewall - see page 26.
3'
MIN
12"
MIN
This option uses a sealed AL29-4C flue and a
E
separate combustion air pipe to the outdoors.
This system terminates both the flue and
combustion air inlet in the same pressure zone
- see page 27.
DIRECT VENT/SEALED
COMBUSTION
3'
MIN
12"
MIN
This option uses the installation of a special air
F
inlet / vent cap on top of the unit - see page 31.
NOTE: CAT I B-VENT MATERIALS MAY BE USED WHEN THE
POWERED VENT IS CONNECTED DIRECTLY TO THE OUTSIDE
VENT CAP. IF THE POWERED VENT IS NOT CONNECTED
DIRECTLY TO THE OUTSIDE VENT CAP, THEN CAT IV - AL29-4C
VENT MATERIALS MUST BE USED FROM THE POWERED VENT
TO THE OUTSIDE VENT CAP.
IMG00584
IMG00585
15