Lochinvar Knight 80 - 285 - Manual (Page 23)

Installation & Operation Manual
23
4
Sidewall direct venting
(continued)
Sidewall termination – optional concentric vent
Multiventing sidewall terminations
When two (2) or more direct vent appliances are vented near
each other, each appliance must be individually vented (see
FIG. 4-13). NEVER common vent or breach vent this appliance.
When two (2) or more direct vent appliances are vented near
each other, two (2) vent terminations may be installed as shown
in FIG. 4-13. The next two (2) vent terminations must be at
least 36 inches away from the first two (2) terminations. It is
important that vent terminations be made as shown to avoid
recirculation of flue gases. Dimension A in FIG. 4-13 represents
the distance between pipes or rain shields, as touching or a 2
inch maximum separation.
Figure 4-13 Concentric Vent and Combustion Air Termination Dimension A as
Touching or 2 inches Maximum Separation
Figure 4-12 Concentric Vent Sidewall Attachment
DO NOT use field-supplied couplings
to extend pipes. Airflow restriction will
occur and may cause intermittent
operation.
9. Cement appliance combustion air and vent pipes to the
concentric vent termination assembly. See FIG. 4-12
for proper pipe attachment.
10. Operate the appliance one (1) heat cycle to ensure
combustion air and vent pipes are properly connected
to the concentric vent termination connections.
CAUTION
Note: CVK3003 shown for illustration purposes.