Installation & Operation Manual
5 Vertical direct venting (continued)
Vertical termination – optional concentric vent: Models 151 - 601
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.
Field supplied pipe and fittings are required to complete the installation.
The required combustion vent pipe and fittings are listed in Table 3A, on page 19 of this manual.
Vertical termination installation
1.See Section 5, Vertical Direct Venting - Determine Location (where applicable).
2.Cut one (1) hole (5 inch diameter for #CVK3003 installations or 7 inch 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 fitting to the larger diameter kit pipe (see FIG.’s
b.Cement rain cap to the smaller diameter kit pipe (see FIG.’s
c.Do not attach a
Figure 5-4 Concentric Vertical Termination
NOTICE | 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 FIG. |
| 29). |
WARNING
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.
Figure 5-5 Do Not Install U-Bend to Rain Cap
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