33
5
Vertical direct venting
(continued)
Vertical termination – optional concentric vent: Models 400 - 600 Only
Description and usage
Lochinvar 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 FIG. 5-4.
Field supplied pipe and fi ttings are required to complete the
installation.
The required combustion vent pipe fi ttings are listed in
Table 3E, on page 21 of this manual.
Vertical termination installation
1. See Section 5, Vertical Direct Venting - Determine
Location (where applicable).
Instead of cementing the smaller pipe
to the rain cap, a fi eld supplied stainless
steel screw may be used to secure the
two (2) components together when fi eld
disassembly is desired for cleaning (see
FIG. 4-10, 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.
2. Cut one (1) hole (7 inch (178 mm) diameter for #CVK3007
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 fi tting to the larger
diameter kit pipe (see FIG. 4-8, page 28).
b. Cement rain cap to the smaller diameter kit pipe (see
FIG. 4-8, page 28).
Figure 5-4 Concentric Vertical Termination
NOTICE
WARNING
Figure 5-5 Do Not Install U-Bend to Rain Cap
Installation & Operation Manual
