Alpine Installation, Operating, and Service Instructions

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Table 6: Vent System and Combustion Air System Components Equivalent Length
vs. Component Nominal Diameter
IV. Venting B. CPVC/PVC Venting (continued)
Vent or Combustion Air System
Component Description
Equivalent Length (Ft.) for Vent or Combustion Air System Component
vs. Component Nominal Diameter (In.)
Component Nominal Diameter, In. 3” 4”
90° Elbow (Sch. 80 or Sch. 40) 10 13
45° Elbow (Sch. 80 or Sch. 40) 3 4.5
Sch. 40 CPVC Pipe x 30 In. Long 2.5
Sch. 40 PVC Pipe x 1 Ft. Long 1
Sch. 40 PVC Pipe x 2 Ft. Long 2
Sch. 40 PVC Pipe x 3 Ft. Long 3
Sch. 40 PVC Pipe x 4 Ft. Long 4
Sch. 40 PVC Pipe x 5 Ft. Long 5
4. Near-Boiler Vent/Combustion Air Piping -
Floor Mounted Boiler Builds
Refer to Figure 7A and the following Steps:
a. All CPVC vent components supplied with boiler
inside vent carton (3” or 4” Schedule 40 x 30”
long CPVC pipe and 3” or 4” Schedule 80 CPVC
90° Elbow) must be used for near-boiler piping
before transitioning to Schedule 40 PVC (ASTM
2665) pipe components for reminder of vent
system. The CPVC 30” long straight pipe may be
cut to accommodate desired vent conguration
provided both pieces are used in conjunction
with CPVC 90° Elbow before any PVC
components are used. Ensure that the CPVC 90°
Elbow is the rst elbow used in the vent system
as it exits the boiler.
b. Clean all vent and combustion air pipe joints
with primer and secure with transition cement
(4-oz. bottles of primer and cement are
supplied with boiler inside vent carton). Follow
application instructions provided on primer and
cement bottles.
5. Field Installation of CPVC Vent Pipe - Wall
Mounted Boiler Builds
Refer to Figure 7B and the following Steps:
The wall mounted boiler builds do not require using
3” Schedule 80 CPVC 90° Elbow for near-boiler
vent piping.
a. Insert provided 3” Schedule 40 x 30” long
CPVC pipe thru air box top combination vent/
combustion air collar vent opening and slide
down with a slight twisting motion, until the pipe
lower end is rmly inserted into female end of
factory installed vent connector 90° Elbow.
b. 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.
i. The CPVC 30” long straight pipe may be cut
to accommodate desired vent conguration.
If the CPVC 30” 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
inches and extends 1-5/8” above air box top,
so a coupling or an elbow can be attached to
it.
Vent Components
Part
Number
Quantity
ALP080B &
ALP105B
Vertical (Roof)
Termination
ALP150B &
ALP210B
Vertical (Roof)
Termination
ALP285B thru
ALP399
Vertical (Roof)
Termination
3" Schedule 40 PVC Coupler
N/A
Supplied
by Others
1 N/A N/A
4" Schedule 40 PVC Coupler N/A 1 1
3" Schedule 40 PVC 90° Elbow 2 N/A N/A
4" Schedule 40 PVC 90° Elbow N/A 2 2
3" Schedule 40 CPVC Pipe x ½ ft. min. horizontal run 1 N/A N/A
4" Schedule 40 CPVC Pipe x ½ ft. min. horizontal run N/A 1 1
Table 5C: CPVC/PVC Vent & Air Intake Components (Installer Provided) required for Optional Vertical
(Roof) Termination