Ultra Boiler Manual
Part number 550-100-440/0122
89
ADVANCED INSTALLATION
Figure 102 DIRECT EXHAUST vertical termination
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 boil-
er to the termination will not exceed the maximum length given in
Figure12,page18.
2. Maximum lengths listed in Figure12,page18 allow for 2 elbows.
Additional elbows require a reduction in maximum length as
explained in the table notes.
Determine location for vertical termination
1. Locate the vent termination using the following guidelines:
2. e vent piping must terminate in a coupling as shown in Fig-
ure103,page90.
3. Consider the surroundings when terminating the vent:
a. Position the vent termination where vapors will not damage
nearby shrubs, plants or air conditioning equipment or be
objectionable.
b. e ue products will form a noticeable plume as they con-
dense in cold air. Avoid areas where the plume could obstruct
window views.
c. Prevailing winds could cause freezing of condensate and
water/ice buildup where ue products impinge on building
surfaces or plants.
d. Avoid possibility of accidental contact of ue products with
people or pets.
e. Do not locate the termination where wind eddies could aect
performance or cause recirculation, such as inside building
corners, near adjacent buildings or surfaces, window wells,
stairwells, alcoves, courtyards or other recessed areas.
f. Locate or guard vent to prevent condensate damage to ex-
terior nishes.
4. Maintain clearances as shown in the illustrations in this manual
section. Also maintain the following:
a. Vent must terminate:
• At least 12 inches above roof or snow line as shown in
Figure103,page90.
• At least 6 feet from adjacent walls.
• No closer than 5 feet below roof overhang.
• At lease 3 feet above any forced air intake within 10feet.
• No closer than 48 inches below or horizontally from any
door or window or any other gravity air inlet.
b. Do not terminate closer than 4 feet horizontally from any
electric meter, gas meter, regulator, relief valve or other
equipment.
5. Where the vent penetrates the roof, the annular space around the
penetration must be permanently sealed using approved materi-
als to prevent entry of combustion products into the building.
6. Locate terminations so they are not likely to be damaged by
foreign objects, such as stones or balls, or subject to buildup of
leaves or sediment.
7. Do not connect any other appliance to the vent pipe. Do not
connect multiple boilers to a common vent pipe.
Step 1 Install the boiler.
Step 2 Determine the proper location for wall pen-
etration for each termination.
• Prepare roof penetrations before installing vent
piping.
• Finish by attaching external pipe and ttings as
shown in the termination instructions.
• Install terminations as described in this manual.
• Support vertical runs on the outside of the build-
ing with brackets as shown in the termination
instructions.
Step 3 Install vent piping from boiler to termination.
• 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
manual instructions.