Lochinvar KNIGHT WH 55 - 399 - Manual (Page 24)

4
Sidewall direct venting
Sidewall termination – optional
concentric vent
Description and usage
Lochinvar offers optional concentric combustion air and vent
pipe termination kits (Factory Kit #CVK3003 for 3" diameter
- models 155 - 199, #CVK3008 for 2" diameter - models 55 -
110, or #CVK3007 for 4" diameter - models 285 - 399). 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 below in FIG. 4-6.
The required combustion vent pipe and fittings are listed in
Table 3A, on page 17 of this manual.
Figure 4-7 Kit Contents - CVK3008 & CVK3003
(reference Table 3C on page 19)
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.
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.
f. Do not terminate above any door or window.
Condensate can freeze, causing ice formations.
g. Locate or guard vent to prevent condensate damage
to exterior finishes.
4. Cut one (1) hole (5 inch diameter for #CVK3003 installations,
4 inch diameter for #CVK3008, 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.
4-7).
b. Cement the rain cap to the smaller diameter kit pipe
(FIG.
4-7).
Figure 4-6 Concentric Sidewall Termination
Figure 4-5B Alternate Multiple Vent Terminations w/
Field Supplied Fittings (must also comply with Figure 4-1B)
24
Installation & Operation Manual
Sidewall termination installation
1. Determine the best location for the termination kit (see FIG.
4-6).
2. The total length of piping for vent or air must not exceed
the limits given in the General Venting Section on page 19
of this manual.
3. You must consider the surroundings when terminating
the vent and air:
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
4" CONCENTRIC
VENT KIT
Figure 4-8 Kit Contents - CVK3007 (reference Table
3C on page 19)