Venting Through An Existing System - Westinghouse WBRC 140 Series Installation, Start-Up, Maintenance, Parts, Warranty

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2. Venting Through an Existing System

This appliance may be vented through an existing unused vent
system. The inner diameter of the existing vent system is utilized for
the combustion air source. Two methods have been approved for such
venting: Concentric Venting Through an Existing System and Venting
as a Chase.
DANGER
!
Do not install the appliance into a common existing vent with
any other appliance. This will cause flue gas spillage or appliance
malfunction, resulting in substantial property damage, serious
personal injury, or death.
CAUTION
Contractors must check state and local codes before installing
through an existing vent opening. State and local codes always take
precedence over manufacturer's instructions. Failure to check state
and local codes before installing through an existing opening could
result in property damage and add significantly to installation costs.
If an existing venting system is converted for use with this appliance,
the installer must ensure that the existing venting system is clean
and free from particulate contamination that could damage the
appliance. Failure to do so could result in property damage and
appliance failure. Such failure IS NOT covered under warranty.
Concentric Venting Through an Existing System
NOTE: The following instructions refer only to venting through an
existing vent system, and not to venting with Westinghouse's optional
concentric vent kits. Refer to Concentric Vent Kit installation manual
Concentric Venting through an Existing System
1
EXHAUST
SEAL
EXISTING
SEALED
CAP
SEAL
Figure 25 - 1, 2 - Concentric Venting Through an Existing System, 3, Chase Venting Through an Existing System
NOTE: These drawings are meant to demonstrate system venting only. The installer is responsible for all equipment and detailing required
by local codes.
whl-648 Rev. 001 Rel. 003 Date 10.8.19
Concentric Venting through an Existing System
2
EXHAUST
COMBUSTION
AIR
EXISTING
SEAL
AIR INTAKE
(w/SCREEN)
SEAL
LP-325-LL
03/15/12
(LP-166) for further information on venting with the optional
concentric vent kits.
Concentric venting through an existing system must run vertically
through the roof. See Table 18 for proper minimum vent sizing. Use
only the approved venting materials specified in Table 13 for piping
the system. All instructions listed in this Venting section apply. See
Figures 25-1 and 25-2 for venting demonstrations.
Vent / Air Inlet Size
2"
3"
4"
Table 18 - Minimum Existing Vent / Chase Sizing
!
The upper and lower vent terminations as well as all joints in
the venting system must be properly sealed to ensure that all
combustion air is drawn properly and exhaust does not leak from
the system. Failure to properly seal the venting system will result
in property damage, serious personal injury, or death.
Chase Venting Through an Existing System
When venting as a chase, follow all instructions included in this
Venting section, including those in the previous Concentric Venting
Through an Existing System section. See Figure 25-3 for chase
venting demonstration.
SEAL
COMBUSTION AIR
AIR INTAKE
w/SCREEN
12" MIN.
SEALED CAP
LP-325-MM
03/15/12
Minimum Existing Vent / Chase Size
4"
5"
7"
DANGER
Chase Venting through an Existing System
3
EXHAUST
24"
INTAKE
SEAL
EXISTING
VENT
SEAL
CAP
LP-325-NN
07/22/13