Installation & Operation Manual
28
4
Sidewall direct venting
4. 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.
5. Partially assemble the concentric vent termination kit.
Clean and cement using the procedures found in these
instructions.
a. Cement the Y concentric fitting to the larger kit pipe
(FIG.’s 4-8 and 4-9).
b. Cement the rain cap to the smaller diameter kit pipe
(FIG.’s 4-8 and 4-9).
4" (102 MM) DIA.
6" (152 MM) DIA.
RAIN CAP
"Y" CONCENTRIC
FITTING
"FLEXIBLE" PIPE
COUPLING
6" (152 MM) DIA.
6" (152 MM) DIA.
6" (152 MM) TO 4" (102 MM) REDUCER
Figure 4-9 Kit Contents_CVK3007 - Models 286 - 601
Sidewall termination – optional concentric vent: Models 151 - 601
Description and usage
Lochinvar offers optional concentric combustion air and
vent pipe termination kits (Factory Kit #CVK3003 for 3”
diameter - Models 151 - 200 and #CVK3007 for 4” diameter
- Models 286 - 601). Both combustion air and vent pipes
must attach to the termination kit. The termination kits
must terminate outside the structure and must be installed as
shown below in FIG. 4-7.
Field supplied pipe and fittings are required to complete the
installation.
The required combustion vent pipe materials are listed in
Table 3A, on page 19 of this manual.
Figure 4-7 Concentric Sidewall Termination
Sidewall termination installation
1. Determine the best location for the termination kit (see
FIG. 4-7).
2. The total length of piping for vent or air must not exceed
the limits given in the General Venting Section on page
22 of this manual.
c. Prevailing winds could cause freezing of
condensate and water/ice buildup where flue
products impinge on building surfaces or plants.
d. Avoid possibility of accidental contact of flue
products with people or pets.
e. Do not terminate above any door or window.
Condensate can freeze, causing ice formations.
f. Locate or guard vent to prevent condensate
damage to exterior finishes.
4" DIA.
SDR-26 PIPE
3" DIA.
SDR-26 PIPE
RAIN CAP
"Y" CONCENTRIC
FITTING
Figure 4-8 Kit Contents_CVK3003 - Models 151 - 200
3. You must consider the surroundings when terminating
the vent and air:
a. Position the vent termination where vapors will
not damage nearby shrubs, plants or air
conditioning equipment or be objectionable.
b. The flue products will form a noticeable plume as
they condense in cold air. Avoid areas where the
plume could obstruct window views.
