IBC SL 28-160, Инструкция по установке и эксплуатации

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1-13
INSTALLATION
SL 28-160 MODULATING GAS BOILER
1.4.7 “Direct Vent” Combustion Air Intake Piping
There are two basic methods of supplying combustion air to an IBC boiler.
The direct vent option uses piping from the outside to supply combustion air
directly to the boiler’s combustion air connection.
EXHAUST PIPE SIZE MAXIMUM EQUIVALENT LENGTH
Sched.40; Rigid PPs
2" 35'
3" 170'
90° long sweep elbow allow 5' equivalent
90° vent elbow allow 8' equivalent
45° elbow allow 3' equivalent
PPs 87-90° elbows use 8' equivalent
3" Stainless Sidewall Terminal
IBC P/N 180-149
No additional allowance required
Flexible PPs
3" Flexible 98' (max.) actual lineal x 1.2 = equivalent
Table 4: Maximum exhaust venting length.
WARNING
In addition to preventing
ingestion of chemical
contaminants, care must
be taken to ensure air
intake terminals are not
installed in locations where
contamination might occur
due to ingestion of particulate
foreign material (dust, dirt
and debris).
Figure 16: Direct vent combustion air intake
WARNING
Intake air openings must be
configured such that rain
or other forms of moisture
cannot enter the air intake
piping system. Otherwise
serious damage to the boiler
may result.
NOTE
Care must be taken when
installing air intake piping to
ensure that a “trap” is not
formed in the piping so as to
allow a build-up of water, and
blockage of intake air.
Such blockage will result in a
boiler safety shut-down.