51
10.12.3 - Multiventing
sidewall terminations
When two or more direct vent
appliances are vented near each
other, each appliance must be
individually vented and vent
terminations may be installed as
shown in Figure 10-22. It is important
that vent terminations be made as
shown to avoid recirculation of fl ue
gas.
WARNING!!!
Do not
connect any other appliance
to the vent pipe or multiple
boilers to a common vent
pipe. Failure to comply could
result in severe personal injury,
death, or substantial property
damage.
Figure 10-22 Concentric sidewall multiple boilers
terminations
10 - INSTALLATION - Vent and combustion air
Vent
Combustion air
intake
NOTE: keep the terminals horizontally in the same line
and at min. 12” from grade or snow line.
CAUTION!!!
DO NOT use fi eld-
supplied couplings to extend
pipes. Airfl ow restriction
will occur and may cause
intermittent operation.
6. Operate the appliance one (1) heat
cycle to ensure combustion air and
vent pipes are properly connected
to the concentric vent termination
connections.
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