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Figure 30
IS AT LEAST 12 inches below vent outlet
IS NO FURTHER than 12 inches away center to center
IS AT LEAST 12 inches above roof or snow line,
keep vents/air intake area clear of accumulating snow.
Read and follow all instructions in this manual.
with vent/air installation until you have read
See notices at left.
Install the boiler in a location that allows proper routing of all vent
and air piping to the selected sidewall location.
Make sure the selected vertical termination location complies with
Figure 22, page 19. (Multiple boiler terminations must also comply
with Figure 31, page 26.)
Use only the vent materials listed in Figure 21, page 17. Provide pipe
adapters where required. Vent piping and air piping lengths must not
exceed the values shown in Figure 20, page 16.
Prepare the vertical penetrations and secure penetration components as
instructed in this section. See “Prepare roof penetrations” on page 26
and “Termination and fittings” on page 26.
The air piping must terminate in a 180-degree return bend or down-
turned elbow as shown above. The vent piping must terminate in a
as shown above.
Install vent and air piping between the boiler and the vertical termina-
tions. Slope horizontal piping downward toward the boiler at least 1/4
inch per foot. Install pipe supports every 5 feet on both the horizontal
and vertical runs. Install a hanger support within 6 inches of any upturn
in the piping. See page 32 for general guidelines. Also comply with vent
pipe manufacturer’s instructions.
See notices at left.
Insert the vent and air piping through the vertical penetrations and
secure the termination fittings.
Maintain clearances shown above. Vent and air terminations must be
fitted with a bird screen as shown.
— DO NOT use short radius elbows for vent or
air piping. Boiler performance could be affected.
Part number 550-100-325/0419
25
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
Allowable vent/air pipe materials
& lengths
Use only the vent materials and kits listed
in Figure 21, page 17. Provide pipe adapt-
ers if specified.
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 Fig-
ure 20, page 16.
For polypropylene applications, comply
with any additional requirements in the
vent system manufacturer’s instructions.
(Do Not use 3” PVC transition pieces
at the boiler vent and air connections).
Install a locking collar at every joint.
For AL29-4C vent pipe applications,
comply with any additional requirements
in the vent system manufacturer’s instruc-
tions. Provide a AL29-4C starter piece
from the AL29-4C manufacturer to the
transition piece at the boiler vent con-
nection. The air piping must be PVC or
CPVC. Provide a 3” PVC transition piece
at the boiler air connection if using 2” air
piping.
1. The air and vent terminations must be installed as
shown in Figure 30.
2. The terminations must comply with clearances and
limitations shown in Figure 22, page 19.
3. Locate the 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.
1. When terminating multiple boilers, terminate each
vent/air connection as described in this manual.
Terminate all vent pipes at the same height
and all air pipes at the same height to
avoid possibility of severe personal injury,
death or substantial property damage.
2. Place roof penetrations to obtain minimum clear-
ance of 12 inches between edge of air intake elbow
and adjacent vent pipe of another boiler for U. S.
installations (see Figure 33, page 28).
3. For Canadian installations, provide clearances re-
quired by CSA B149.1 or B149.2 Installation Code
and a ULC S636 compliant vent kit.
4. The air inlet of a boiler is part of a direct vent con-
nection. It is not classified as a forced air intake with
regard to spacing from adjacent boiler vents.
12 DIRECT VENT —
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