Figure 33
).34!,,!4)/.3%15%.#%
#ONCENTRICVERTICAL
Part number 550-100-305/0916
29
AquaBalance
TM
W
ALL
M
OUNT
GAS
-
FIRED
WATER
BOILER
— C
OMBI
Boiler Manual
Allowable vent/air pipe materials &
lengths
1. The concentric termination kit must be purchased
separately.
Use only the vent materials and kits listed in
Figure 22, page 19. Provide pipe adapters if
specified.
2. Locate the termination such that the total air piping and
vent piping from the boiler to the termination will not
exceed the maximum length given in Figure 21, page 18.
3. This termination requires a 45-degree elbow that is not
supplied with the termination kit. The maximum vent/
air pipe lengths include allowance for this elbow.
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)and at the termination if
using a 3” PVC concentric vent kit. Install a
locking collar at every joint.
For AL29-4C vent pipe applications, comply
with any additional requirements in the vent
system manufacturer’s instructions. Provide
a AL29-4C starter piece from the AL29-4C
manufacturer to the transition at the boiler
vent connection. Air pipe must be PVC or
CPVC. Provide a 3” PVC transition at the
boiler air connection if using 2” air pipe.
Provide transition pieces to PVC at the vent
and air pipe termination connections.
Determine termination location
Locate the concentric vent/air termination using the fol-
lowing guidelines:
1. The concentric vent/air assembly must terminate as
shown in Figure 35, page 30.
2. The termination must comply with the clearances and
limitations shown in Figure 23, page 21.
3. Locate the termination so it is not likely to be damaged
by foreign objects, such as stones or balls, or subject to
buildup of leaves or sediment.
-ULTIPLEVENTAIRTERMINATIONS
1. When terminating multiple boilers, install the con-
centric vent/air termination assemblies as described in
this manual.
All vent outlets must terminate 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 the edges of adjacent vent
pipes of other boilers for U. S. installations (see Fig-
ure 34, page 30).
3. The air inlet of a boiler is part of a direct vent connec-
tion. It is not classified as a forced air intake with regard
to spacing from adjacent boiler vents.
13
DIRECT VENT —
6ERTICALCONCENTRIC
3TEP
Read and follow all instructions in this manual.
$/ ./4
PROCEEDWITHVENTAIRINSTALLATIONUNTILYOUHAVEREAD
PAGETHROUGHPAGE
See notices
at left.
3TEP
Install the boiler in a location that allows proper routing of all
vent and air piping to the selected sidewall location.
3TEP
Make sure the selected vertical termination location complies
with Figure 23, page 21. (Multiple boiler concentric terminations
must also comply with Figure 34, page 30.)
3TEP
Use only the vent materials listed in Figure 22, page 19. Provide
pipe adapters where required.
3TEP
Vent piping and air piping lengths must not exceed the values
shown in Figure 21, page 18.
3TEP
The concentric termination must be assembled and installed
before piping from the boiler to the termination.
3TEP
Prepare the vertical penetration(s) — assemble the concentric
termination kit and secure the penetration components as
instructed in this section. Provide the supports indicated and
mount the termination assembly. See “Prepare roof penetrations”
on page 30 and “Mount concentric termination” on page 30.
See notices at left.
3TEP
Install vent and air piping between the boiler and the concentric
vent/air termination. Slope horizontal piping downward toward
the boiler at least 1/4 inch per foot. See page 32 for general
guidelines.
3TEP
Install pipe supports every 5 feet on both the horizontal and
vertical runs.
See notices at left.
3TEP
Install a hanger support within 6 inches of any upturn in the
piping.
See notices at left.
53% 37%%0 %,"/73 &/2 !,,6%.4 !.$
!)2 0)0).'
— DO NOT use short radius elbows
for vent or air piping. Boiler performance could be
affected.
