Installation & Operation Manual
5Vertical direct venting
Vertical termination – optional concentric vent: Models 399 - 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.
Field supplied pipe and fittings are required to complete the installation.
The required combustion vent pipe fittings are listed in Table 3A, on page 18 of this manual.
Vertical termination installation
1.See Section 5, Vertical Direct Venting - Determine Location (where applicable).
Figure 5-4 Concentric Vertical Termination
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 fitting to the larger diameter kit pipe (see FIG.
b.Cement rain cap to the smaller diameter kit pipe (see FIG.
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. |
|
| ||
VENT
COMBUSTION
AIR
12" (305 MM) (18" (457 MM)
FOR CANADA) MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL. MAXIMUM OF
24" (610 MM) ABOVE ROOF.
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-Bent to Rain Cap
32 
