Installation Manual

46
WHL-016 REV. 3.4.15
Do not install the heater into a common existing vent with any other appliance. This will cause flue gas spillage or heater malfunction,
resulting in substantial property damage, severe 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.
If an existing venting system is converted for use with this heater, the installer must ensure that the existing venting system is clean and
free from particulate contamination that could damage the heater. Failure to do so could result in property damage and heater 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 14 for proper minimum vent sizing. Use
only the approved venting materials specified in Table 10 for piping the system. All instructions listed in the Venting section apply. See
Figures 23-1 and 23-2 for venting demonstrations.
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, severe personal injury, or death.
CHASE VENTING THROUGH AN EXISTING SYSTEM
When venting as a chase, follow all instructions included in Venting section of this manual, as well as the previous Concentric Venting
section. See Figure 23-3 for chase venting demonstration.
Figures 23 – 1, 23 – 2 Concentric Venting Through an Existing System, 23 – 3 Chase Venting Through an Existing System NOTE: This drawing
is meant to demonstrate system venting only. The installer is responsible for all equipment and detailing required by local codes.