Ultra Boiler Manual
Part number 550-100-440/0122
86
Figure 97 DIRECT EXHAUST — Sidewall
termination
Step 1 Install the boiler.
Step 2 Determine the proper location for wall
penetration for each termination.
• Prepare wall penetrations before installing
vent piping.
• Finish by attaching external pipe and
ttings as shown in the termination in-
structions.
• Support vertical runs on the outside of
the building with brackets as shown in the
termination instructions.
Step 3 Install vent piping from boiler to termi-
nation.
• Install a hanger support within 6inches of
any upturn in the piping.
• Install pipe supports every 5 feet on both
the horizontal and vertical runs.
• Slope horizontal piping downward toward
the boiler at least 1/4 inch per foot.
Step 4 Connect the vent piping at the boiler per
instructions in this addendum.
1. Use only the materials listed in Figure13,page19.
2. Install a bird screen in each vent pipe termination (coupling or elbow).
Bird screens are not supplied with the Ultra boiler. Purchase separately
from WM Technologies.
1. Locate the termination such that the total vent piping from the boiler
to the termination will not exceed the maximum length given in
Figure12,page18.
2. Maximum lengths listed in Figure12,page18 allow for 2 elbows. Ad-
ditional elbows require a reduction in maximum length as explained
in the table notes.
A gas vent extending through an exterior wall shall not ter-
minate 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 terminations using the following guidelines.
3. Terminate the vent piping with a down-turned elbow as shown in
Figure98,page87. e elbow must butt against the outside wall plate.
If vent piping is extended outside, install an elbow at the outer plate
and continue vent piping from the elbow when snorkeling as in Fig-
ure98,page87 right side.
a. Apply the conguration on the le side of Figure98,page87 unless
the termination would fail to meet minimum clearance to grade
or snow line.
b. Apply the conguration on the right side of Figure98,page87
when the termination needs to be raised higher to meet clearance
to grade or snow line.
c. e vent pipe may run up as high as 4 feet, as shown in Fig-
ure98,page87 right side, with no enclosure. e vent pipe must be
secured with braces, and maintain all required clearances.
d. Space braces no further than 24 inches apart. (See WARNING below
for extremely cold climates.)
e. External venting greater than 4 feet requires an enclosure around
the vent pipe. e vent termination must exit through the enclosure
as shown in Figure98,page87, maintaining all required clearances.
Do not exceed the maximum length of the outside vent pip-
ing shown in Figure98,page87. Excessive length exposed
to the outside could cause freezing of condensate in the vent
pipe, resulting in potential boiler shutdown. In extremely
cold climates, install an insulated chase around the vent pip-
ing, particularly when using longer lengths. e chase must
allow for inspection of the vent pipe, and insulation must be
protected from water.