Install Instructions

40
107750-01 - 9/17
Option # 35 36 37 38 39 40
Illustrated in Figure 7.23, 7.24 7.23, 7.24 7.23, 7.24 7.23, 7.24 7.23, 7.24 7.23, 7.24
Pipe Penetration
Through Structure
Vent Roof Roof Roof Roof Roof Roof
Intake Wall Wall Wall Wall Wall Wall
Material
Vent
Selkirk
Polyue (Rigid/
Flex)
Selkirk
Polyue (Rigid/
Flex)
Centrotherm
InnoFlue
(Rigid/Flex)
Centrotherm
InnoFlue
(Rigid/Flex)
DuraVent
FasNSeal
Flex
DuraVent
FasNSeal
Flex
Intake PVC PVC PVC PVC
Stainless
Steel
Stainless
Steel
Nominal Diameter
Vent 3" 4" 3" 4" 3" 4"
Intake 3" or 4" 4" 3" or 4" 4" 3" 4"
Min Equivalent Vent Length:
Model Sizes
320 30" 30" 30" 30" 30" 30"
399 30" 30" 30" 30" 30" 30"
Max Equivalent Vent Length (Note 1):
Model Sizes
320 60ft 135ft 60ft 135ft 60ft 135ft
399 50ft 135ft 50ft 135ft 50ft 135ft
Rigid Vent Terminals
Vent
Not Permitted
Intake
Flex Termination
& Components
(Masonry Chimney
Chase) (Note 3)
Vent
3PF-FLEX-KIT
3PF-FLEX
4PF-FLEX-KIT
4PF-FLEX
IFCK03** IFCK04**
3FSFLEX-**
FSRC3
4FSFLEX-**
FSRC4
Intake
90 elbow w/
screen
90 elbow w/
screen
90 elbow w/
screen
90 elbow w/
screen
90 elbow w/
screen
90 elbow w/
screen
Flex Termination &
Components (B-Vent
Chimney Chase)
Vent
3PF-10UV or
3PF-39UV w/
Screen 3PF-
BVSC (Note 4)
4PF-10UV OR
4PF-39UV w/
Screen 4PF-
BVSC (Note 4)
IFBK03**** IFBK04****
Not Permitted
Intake
90 elbow w/
screen
90 elbow w/
screen
90 elbow w/
screen
90 elbow w/
screen
VII. Venting D. Design Requirements Unique to Split Vent Systems (continued)
* Specify size of B vent (e.g. 3PPS-BV6 is for use with 6" B vent).
** Specify length in feet.
**** Specify Flex length and B vent diameter (e.g. IFBK032505 includes 25ft of ex and used with 5" B vent).
Note 1: Max vent lengths shown also apply to the intake. Flex vent reduces the maximum allowable vent length. See equivalent
lengths for ex vent shown in Figure 7.14 and sizing example on page 32.
Note 2: At least 30" of CPVC pipe, and at least one CPVC elbow, must be installed between the boiler's vent connection and
PVC pipe.
Note 3: If masonry chimney contains ues in addition to that being used for chase, ALL must be unused.
Note 4: See vent manufacturer's installation manual for gaskets, spacers and other required vent components.
All vertical terminals require compatible roof ashing and storm collars.
Table 7.21: Summary of Split Vent System Options (continued)