Lochinvar 400 - Manual (Page 29)

Installation & Operation Manual
29
4
Sidewall direct venting
(continued)
Sidewall termination – optional concentric vent: Models 400 - 601 Only
Multiventing sidewall terminations
When two (2) or more direct vent appliances are vented near
each other, each appliance must be individually vented (see
FIG. 4-12). 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. 4-12. It is important that vent terminations be made as
shown to avoid recirculation of flue gases.
VENT
COMBUSTION
AIR
12"
MINIMUM
Figure 4-12 Concentric Vent and Combustion Air Termination
COMBUSTION AIR
VENT
VENT
COMBUSTION AIR
STRAP
(FIELD SUPPLIED)
ELBOW
(FIELD SUPPLIED)
Figure 4-11 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. 4-11
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