Install Instructions

10
NOTICE
The gasketed vent system components pictured below in Figure A are being phased in and each vent component
is interchangeable with the previously supplied gasket-less venting components. The newer vent components
are generally quicker and easier to join, as they do not require the sealant application and their clamp bands
are attached.
In the event a gasketed vent component and a gasket-
less vent component must be interconnected, follow the
instructions associated with Figure 8B or 8C. The two
guiding principles of these instructions are as follows:
1) Any joining of vent components that involves
at least one gasket-less vent component
always requires the sealant application.
2) The female end of a gasket-less vent
component always requires a clamp band,
regardless of the design of the mating male
vent component.
Each gasket-less vent component is supplied with a clamp band and sealant.
A Vent Transition Kit, part number 6116302, is available that contains one clamp band and one 3 ounce tube
of sealant.
Table 7: Maximum Equivalent Vent Length
Table 8: Vent System Components
V. Venting
Figure A: U.S. Boiler Company Vent
A. General Guidelines
1. Vent system installation must be in accordance with
National Fuel Gas Code, ANSI Z223.1 /NFPA 54,
Venting of Equipment, or applicable provisions of
localbuildingcodes.Contactlocalbuildingorre
ofcialsaboutrestrictionsandinstallationinspection
in your area. This Category III venting system must
be installed in accordance to these instructions.
2. This boiler requires a Special Gas Vent. The product
is designed to use supplied AL 29-4C
®
Stainless
Steel vent system components. The following
manufacturer's offer similar AL 29-4C
®
components
and are approved for use with this product: Heat-
Fab - Saf-T-Vent (800-772-0739); Flex-L
International - Star-34 (800-561-1980); Protech
Systems, Inc. - FasNSeal™ (800-766-3473); and
Z-Flex U. S., Inc. - Z-Vent (800-654-5600). The use
of these alternate manufacturer's venting systems
will require adapters to connect to the supplied vent
connector and vent terminal. These adapters are not
supplied with this boiler and should be obtained
from the supplier of the alternate manufacturer's
venting system. See Table 8 for complete parts list.
WARNING
Do not use this boiler with galvanized, 304 or 316
stainless steel or any other non AL29-4C
®
based
vent systems.
3. Vent length restrictions are based on equivalent
length of vent pipe (total length of straight pipe plus
equivalentlengthofttings).Maximumventlength
is listed in Table 7. Do not exceed maximum
lengths. Minimum vent length is 8 feet. Table 8 lists
equivalentlengthforttings.DonotincludeVent
Terminal in equivalent feet calculation.
IN3PVNI IN4PVNI IN5PVNI IN6PVNI
45 35 35 35
Vent System Component
Part
Number
Equivalent
Feet of Pipe
3" Dia. Pipe x 1 Ft 8116296U 1
3" Dia. Pipe x 3 Ft 8116298U 3
3" Dia. Pipe x 5 Ft 8116300U 5
3" Dia. Pipe x Adjustable 8116319U
Equal to
Installed Length
(1.1 to 1.7)
3" Dia. 90° Elbow 8116294U 5
3" Dia. 45° Elbow 8116292U 5
3" Dia. Horizontal Drain Tee 8116302U ½
3" Dia. Vertical Drain Tee 8116304U 7½
3" Single Wall Thimble 8116116 ---
3" Double Wall Thimble 103877-01 ---