Vertical Termination - Optional Concentric Vent: Models 150 - 600 - Smith XWH 150 Instruction Manual

VERTICAL TERMINATION - OPTIONAL CONCENTRIC
VENT: MODELS 150 - 600
DESCRIPTION AND USAGE
A. O. Smith offers an optional concentric combustion air and vent
pipe termination kit. Both combustion air and vent pipes must
attach to the termination kit. The termination kit must terminate
outside the structure and must be installed as shown in Figure
47.
Field supplied pipe and fittings are required to complete the
installation.
The required combustion vent pipe and fittings are listed in Table
8, on Page 19 of this manual.
VERTICAL TERMINATION INSTALLATION
1. See Vertical Direct Venting - Determine Location (where
applicable).
Figure 47. Concentric Vertical Termination
Figure 48. Do Not Install U-Bend to Rain Cap
2. Cut one (1) hole (5 inch diameter for #100274637 installations
or 7 inch diameter for #100274638 installations) into the
structure to install the termination kit.
3. Partially assemble the concentric vent termination kit. Clean
and cement following the cleaning procedures in these
instructions.
a. Cement the Y concentric fitting to the larger diameter kit
pipe (see Figure's 36 and 37 on Page 28).
b. Cement rain cap to the smaller diameter kit pipe (see
Figure's 36 and 37 on Page 28).
c. Do not attach a U-Bend to the rain cap. Doing so could
cause recirculation (see Figure 48).
NOTE: Instead of cementing the smaller pipe to the rain cap, a
field supplied stainless steel screw may be used to secure the
two (2) components together when field disassembly is desired
for cleaning (see Figure 40 on Page 29).
When using the alternate screw assembly method, drill a
clearance hole in the rain cap and a pilot hole in the vent pipe
for the screw size being used. Failure to drill adequate holes
may cause cracking of PVC components, allowing combustion
products to be recirculated. Failure to follow this warning could
result in personal injury or death.
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