Lochinvar Shield SNR200-100 - Manual (Page 28)

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Sidewall direct venting
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. 3-13). 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. 3-13. The 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. 3-13 represents
the distance between pipes or rain shields, as touching or a 2
inch maximum separation.
Figure 3-13 Concentric Vent and Combustion Air Termination Dimension A as
Touching or 2 inches Maximum Separation
Figure 3-12 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. 3-12 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.
Installation & Service Manual TM