Direct Vent - Sidewall - Weil-McLain Ultra Commercial Installation And Start-Up Manual

COMMERCIAL GAS
DIRECT VENT — Sidewall
DIRECT VENT — Sidewall
termination with separate vent
and air pipes — installation
sequence
Install the boiler.
Determine the proper location for
wall penetration for each termina-
tion.
Prepare wall penetrations before
installing vent and air piping.
Finish by attaching external pipe
and fittings as shown in the termi-
nation instructions.
Install termination assembly as
described in this manual.
Support vertical runs on the out-
side of the building with brack-
ets as shown in the termination
instructions.
Install air and vent piping from
boiler to termination.
Install a hanger support within
6 inches of any upturn in the pip-
ing.
Slope horizontal piping downward
toward the boiler at least 1/4 inch
per foot.
Connect the vent and air piping at
the boiler per manual instructions.
Part number 550-100-086/0809
-
FIRED WATER BOILER
Allowable vent/air pipe materials
1. Use only the materials listed in
2. Install a bird screen in each vent and air pipe termination. Bird screens
are supplied with the boiler. Cut to size if necessary to fit vent pipe
size used.
Maximum piping length
1. Locate the terminations such that the total air piping and vent piping
from the boiler to the termination will not exceed the maximum length
given in Figure 34.
2. Maximum lengths listed in
elbows require a reduction in maximum length as explained in the
table notes.
Connecting from termination to boiler
1. Install the terminations as instructed in the following. Then proceed to
page 46 to complete the air and vent piping between the termination
and the boiler.
550
750
* 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:
Determine location for termination
1. Place the vent/air terminations using the following guidelines.
2. The vent and air piping must terminate as shown in
(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.
a.
— Boiler Manual
Figure 20, page 27.
Figure 34 allow for 2 elbows. Additional
Maximum piping lengths for DIRECT VENT sidewall
termination
Feet Elbows **
100 2
30 2
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.
Apply the configuration on the left side of
terminations would fail to meet minimum clearance to grade or
snow line.
Feet Elbows **
Not allowed
100 2
Figure 35, page 40.
Figure 35 unless the
39