Part number 550-100-086/0809
39
COMMERCIAL
GAS
-
FIRED
WATER
BOILER
—
Boiler Manual
DIRECT VENT — Sidewall
$)2%#46%.4SIDEWALLTERMINATION
&IGURE
DIRECT VENT — Sidewall
termination with separate vent
and air pipes — installation
sequence
Install the boiler.
3TEP
Determine the proper location for
3TEP
wall penetration for each termina-
tion.
Prepare wall penetrations before
s
installing vent and air piping.
Finish by attaching external pipe
s
and fittings as shown in the termi-
nation instructions.
Install termination assembly as
s
described in this manual.
Support vertical runs on the out-
s
side of the building with brack-
ets as shown in the termination
instructions.
Install air and vent piping from
3TEP
boiler to termination.
Install a hanger support within
s
6 inches of any upturn in the pip-
ing.
Slope horizontal piping downward
s
toward the boiler at least 1/4 inch
per foot.
Connect the vent and air piping at
3TEP
the boiler per manual instructions.
Allowable vent/air pipe materials
Use only the materials listed in
1.
Figure 20, page 27.
Install a bird screen in each vent and air pipe termination. Bird screens
2.
are supplied with the boiler. Cut to size if necessary to fit vent pipe
size used.
Maximum piping length
Locate the terminations such that the total air piping and vent piping
1.
from the boiler to the termination will not exceed the maximum length
given in Figure 34.
Maximum lengths listed in
2.
Figure 34 allow for 2 elbows. Additional
elbows require a reduction in maximum length as explained in the
table notes.
Connecting from termination to boiler
Install the terminations as instructed in the following. Then proceed to
1.
page 46 to complete the air and vent piping between the termination
and the boiler.
Maximum piping lengths for DIRECT VENT sidewall
&IGURE
termination
"OILER
5LTRAn
-AXIMUMPIPING
INCHDIAMETER
-AXIMUMPIPING
INCHDIAMETER
Feet
Elbows **
Feet
Elbows **
550
100
2
Not allowed
750
30
2
100
2
*
Install pipe reducers to adapt from 6” PVC to the 8-inch PVC pipe size
required at the boiler for both air and vent connections. You do not have to
reduce allowable pipe length for the reducers. Install reducers directly at the
boiler, oriented vertically.
**
For piping using more than 2 elbows, reduce maximum allowable length:
sFEETFOREACHADDITIONALINCHORINCHELBOWOR
Determine location for termination
A gas vent extending through an exterior wall shall not
terminate adjacent to the wall or below building extensions
such as eaves, parapets, balconies or decks, except as otherwise
instructed in this manual or local codes. Failure to comply
could result in severe personal injury, death or substantial
property damage.
Place the vent/air terminations using the following guidelines.
1.
The vent and air piping must terminate as shown in
2.
Figure 35, page 40.
(The elbow at the exit opening must butt against the outside wall
plate.) This arrangement avoids recirculation of flue products into the
combustion air stream.
Apply the configuration on the left side of
a.
Figure 35 unless the
terminations would fail to meet minimum clearance to grade or
snow line.