Install Instructions

32 103448-08- 9/16
d. Secure the pipe by tightening the metal strap
worm screw.
WARNING
Failure to properly secure the vent into the elbow
with the clamp could lead to property damage,
personal injury or loss of life.
e. The CPVC 30 in. long straight pipe may be cut
to accommodate desired vent conguration. If
the CPVC 30 in. straight pipe needs to be cut
into two pieces to accommodate desired vent
conguration, insure that the rst vertical piece
has minimum length of 12 in. and extends 1-5/8
in. above air box top, so a coupling or an elbow
can be attached to it.
f. The factory supplied CPVC vent pipe (3 in.
Schedule 40 x 30 in. long CPVC pipe) must be
used for near-boiler piping before transitioning
to Schedule 30 PVC (ASTM 2665) pipe
components for reminder of vent system.
g. Clean all vent and combustion air pipe joints
with primer and secure with transition cement.
Follow application instructions provided on
primer and cement bottles.
h. For ALP080BW and ALP105BW vent size can
be reduced from 3” nominal diameter to 2”
nominal diameter by mounting installer provided
3” x 2” CPVC concentric reducing coupling or
PVC concentric reducing coupling, in vertical
position only, onto the end of supplied CPVC
vent pipe. See Table 5A Notes and paragraph 6
‘Horizontal Sidewall Termination’ and Figure 12
‘Wall Penetration Clearances for PVC Pipe for
PVC usage for venting limitation). Thereafter,
the balance of vent pipe up to vent termination
can be done with PVC (ASTM 2665) pipe.
i. For ALP080BW and ALP105BW air intake size
can be reduced from 3” nominal diameter to 2”
nominal diameter by mounting installer provided
3” x 2” concentric PVC reducing coupling onto
the end of PVC (ASTM 2665) pipe mounted
over air box intake collar. Thereafter, the balance
of air intake pipe up to air intake termination can
be done with PVC (ASTM 2665) pipe.
j. For ALP080BF and ALP105BF vent size can be
reduced from 3” nominal diameter to 2” nominal
diameter by mounting installer provided 3” x
2” concentric CPVC reducing coupling or PVC
concentric reducing coupling, in vertical position
only, onto the end of supplied CPVC vent pipe/
elbow combination. See Table 5A Notes and
paragraph 6 ‘Horizontal Sidewall Termination’
and Figure 12 ‘Wall Penetration Clearances for
IV. Venting B. CPVC/PVC Venting (continued)
PVC Pipe for PVC usage for venting limitation.
Thereafter, the balance of vent pipe up to vent
termination can be done with PVC (ASTM 2665)
pipe.
5. System Assembly
WARNING
Asphyxiation Hazard. CPVC/PVC vent piping and
ttings rely on glued joints for proper sealing.
Follow all manufacturer instructions and
warnings when preparing pipe ends for joining
and using the primer and the cement.
a. Plan venting system to avoid possible contact
with plumbing or electrical wires. Start at
vent connector at boiler and work towards vent
termination.
b. Design the vent system to allow 3/8 in.
(9.5 mm) of thermal expansion per 10 ft. (3.0 m)
of CPVC/PVC pipe. Runs of 20 ft. (6.1 m) or
longer that are restrained at both ends must use
an offset or expansion loop. Refer to Figure 11
and Table 6A.
c. All CPVC/PVC vent and combustion air
pipe joints must be cleaned with primer and
glued with cement. Follow all manufacturer
instructions and warnings when preparing pipe
ends for joining and using the primer and the
cement.
6. Horizontal Sidewall Termination
a. Standard Two-Pipe Termination, see Figures 5A
and 5B.
i. Vent Piping
Running PVC vent pipe inside Enclosures
and through Walls:
• PVC vent pipe must be installed in such
way as to permit adequate air circulation
around the outside of the pipe to prevent
internal wall temperature rising above
ANSI Z21.13 standard specied limit.
• Do not enclose PVC venting. Use higher
temperature rated CPVC pipe in enclosed
spaces or to penetrate combustible or non-
combustible walls.
• Following the installation of factory
supplied near boiler CPVC venting
components (30” long pipe and 90° elbow,
where applicable) PVC pipe may be
used to penetrate combustible or non-
combustible walls up to the exterior vent
termination only if the following three
conditions are met simultaneously (see
Figure 12):