Direct Exhaust - Vertical - Weil-McLain Ultra Commercial Installation And Start-Up Manual

COMMERCIAL GAS
DIRECT EXHAUST — Vertical
DIRECT EXHAUST vertical termination
DIRECT EXHAUST — Vertical
termination — installation
sequence
Install the boiler.
Determine the proper location for
wall penetration for each termina-
tion.
Prepare roof penetrations before
installing vent piping.
Finish by attaching external pipe
and fittings as shown in the termi-
nation instructions.
Install terminations 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 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 piping at the boiler
per manual instructions.
Part number 550-100-086/0809
-
FIRED WATER BOILER
Allowable vent pipe materials
1. Use only the materials listed in
2. Install a bird screen in each vent termination (coupling or elbow).
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 vent piping from the
boiler to the termination will not exceed the maximum length given
in Figure 29.
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 termination as instructed in the following. Then proceed
to page 46 to complete the vent piping between the termination and
the boiler.
550
750
* Install a pipe reducer to adapt from 6" PVC to the 8" PVC pipe size required
at the boiler. You do not have to reduce allowable pipe length for the re-
ducer. Install reducer directly at the boiler, oriented vertically.
** For piping using more than 2 elbows, reduce maximum allowable length:
Determine location for vertical termination
1. Locate the vent termination using the following guidelines:
2. The vent piping must terminate in a coupling as shown in
page 36.
3. Consider the surroundings when terminating the vent:
a.
b.
c.
d.
e.
— Boiler Manual
Figure 20, page 27.
Figure 29 allow for 2 elbows. Additional
Maximum piping lengths for DIRECT EXHAUST vertical
termination
Feet Elbows **
100 2
30 2
Position the vent termination where vapors will not damage nearby
shrubs, plants or air conditioning equipment or be objectionable.
The flue products will form a noticeable plume as they condense
in cold air. Avoid areas where the plume could obstruct window
views.
Prevailing winds could cause freezing of condensate and water/
ice buildup where flue products impinge on building surfaces or
plants.
Avoid possibility of accidental contact of flue products with people
or pets.
Do not locate the termination where wind eddies could affect per-
formance or cause recirculation, such as inside building corners,
Feet Elbows **
Not allowed
100 2
Figure 30,
35