ECR International Utica Boilers UCS 240 Installation, Operation & Maintenance Manual page 37

A. Single Line System
System consisting of boilers arranged in line each connected to
common exhaust manifold.
FIGURE 6-27
2 in. per 3 ft. 4 in.
(50.0 mm per 1.0 m)
3°
B. Back to Back System
This system consists of boilers installed back to back
connected to a common exhaust manifold.
FIGURE 6-28
2 in. per 3 ft. 4 in.
(50.0 mm per 1.0 m)
3°
6 - COMBUSTION AIR AND VENT PIPING
35
PN 240011654, Rev. J [01/31/2020]