Installation Manual

36
WHL-019 REV. 12.17.14
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 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 9 for proper minimum vent sizing. Use
only the approved venting materials specified in Table 4 for piping the system. All instructions listed in Part 5 - Venting apply. See
Figures 18-1 and 18-2 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 Part 5 – Venting of this manual, as well as the previous Concentric Venting
section. See Figure 18-3 for chase venting demonstration.
Figures 18 – 1, 18 – 2 Concentric Venting Through an Existing System, 18 – 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.