UTICA BOILERS UCS 380 Installation, Operation And Maintenance Manual page 26

WARNING
!
Asphyxiation hazard! For Duravent polypropylene
twin pipe only. The twin pipe vent connections on
the 380 boiler are designed to accept 110 mm.
DuraVent polypropylene 4" venting measures 100
mm.
Manufacturer requires transition pieces from
Duravent to adapt from 110 mm to 100 mm. One
transition is required for the exhaust and one is
required for the fresh air intake.
Failure to follow these instructions could result in
death or serious injury.
WARNING
!
Asphyxiation hazard! Improper installation could
result in death or serious injury. Read Twin Pipe
Installation Instructions completely and understand
all requirements before beginning installation.
Twin Pipe Maximum Vent Lengths (See Figure 6-6)
Intake Vent
Exhaust Vent
Combined Vent
Elbow
45°
90°
Do not count first elbow against maximum vent
Note
length.
If using indoor air for combustion do not exceed
Note
100ft (30m) exhaust vent pipe.
6 - COMBUSTION AIR AND VENT PIPING
L1 49 ft (15 m)
L2 51 ft (15.5 m)
L1+L2 100 ft (30.5 m)
Total Length Reduction
10" (0.3 m)
2 ft (0.6 m)
FIGURE 6-5 - Two Pipe Polypropylene System
Adapter
FIGURE 6-6 - Separated Horizontal Flue Termination
24
Boiler
PN 240011662 Rev. K [01/31/2020]