whl-648 Rev. 001 Rel. 003 Date 10.8.19
36
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.
Vent / Air Inlet Size
Minimum Existing Vent / Chase Size
2”
4”
3”
5”
4”
7”
Table 18 - Minimum Existing Vent / Chase Sizing
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.
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.
CAUTION
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
(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.
DANGER
!
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
SEALED
EXISTING
EXHAUST
CAP
(w/SCREEN)
SEAL
AIR INTAKE
SEAL
LP-325-LL
03/15/12
Exhaust
In
take
Concentric Venting through an Existing System
1
12" MIN.
LP-325-MM
03/15/12
EXHAUST
SEAL
w/SCREEN
EXISTING
AIR INTAKE
SEALED CAP
COMBUSTION AIR
COMBUSTION
AIR
SEAL
Concentric Venting through an Existing System
2
In
take
Exhaust
Exhaust
In
take
07/22/13
LP-325-NN
INTAKE
EXHAUST
24"
SEAL
EXISTING
VENT
CAP
SEAL
Exhaust
In
take
Chase Venting through an Existing System
3
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.
Summary of Contents for WBRC 140 Series
Page 21: ...whl 648 Rev 001 Rel 003 Date 10 8 19 21 E Applications Figure 10 Piping Symbol Legend ...
Page 40: ...whl 648 Rev 001 Rel 003 Date 10 8 19 40 Figure 33 Electrical Wiring Diagram ...
Page 41: ...whl 648 Rev 001 Rel 003 Date 10 8 19 41 Figure 34 Ladder Diagram ...
Page 81: ...whl 648 Rev 001 Rel 003 Date 10 8 19 81 Notes ...
Page 82: ...whl 648 Rev 001 Rel 003 Date 10 8 19 82 This Page Intentionally Left Blank ...
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