A.O. Smith UB - 70 Boiler User Manual


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Installation and Service Manual Upsilon-Series
27
7.5 Collectiveuegasoutlet
Opting for a collective ue gas outlet is determined by:
- The position of the boilers with regard to their outlet area
- Sufcient space above the boilers
- Large number of boilers
You may opt for:
- Collective ue gas outlet under-pressure
- Collective ue gas outlet over-pressure
In many situations, ue gases cannot be vented individually because the installation
is indoors. For such situations, we recommend collective venting by means of under-
pressure or over-pressure using a ue gas outlet system. The air supply may also be
supplied collectively, but if the boiler room is suitable for that purpose (refer to chapter
6.3) it may also be obtained from this area (`open device` Boiler category B).
Inthecaseofcollectiveventingofuegases,theuegas-ventingoutletalways
hastoendupintheopenarea(outletarea1).
A.O.Smith can supply a collective ue gas outlet system for the Upsilon boiler. Refer to
the following chapters with regard to the various possibilities and maximum pipe lengths
that can be used.
0,2 x
2xB
Flue outlet possibilites collective ue gas outlet gure 7.5.a
Boiler category: B
Outlet area 1
(free outlet area)
Boiler category: C
Permittedonlywhentheair
intakeandtheuegas
outletareinthesame
pressurearea
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