Multiple Boiler Venting - Layout - UTICA BOILERS UCS-380 Installation, Operation & Maintenance Manual

6.11 Multiple Boiler Venting - Venting Layout
Available pressure at flue outlet is 0.40" w.c. (100pa)
Flue Outlet
Heat input Heat input
BTUH (kW)
443,578 130
887,156 260
1,330,735 390
*6 in. / 8 in. Vent System:
• Horizontal vent pipe size 6 in. (150 mm)
• Vertical vent pipe size 8 in. (200.00 mm).
• Length between vertical vent pipe and last horizontal
vent collector pipe = 3 ft 4 in (1.00 m).
• For calculating other lengths between last collector
and shaft, length of vertical height must be reduced
by this additional length and by the numbers of bends
according to the table.
Elbow Type 6 in.
- Equivalent Length
45° 5 ft 7 in
90° 13 ft 1 in
6 in. Cascade Vent System Example
Elbow Equivalent Length
Number of Elbows
Equivalent Length
Total Equivalent Length
Total Equivalent Length
Horizontal Length
Total Equivalent Horizontal Length
Maximum Vertical Length
Total Vertical Length
6 - COMBUSTION AIR AND VENT PIPING
Number of
6 in (150 mm)
appliances
98 ft
2 4 13/16 in
98 ft
4 4 13/16 in
6 -
8 in.
Equivalent Length
1.7m 12 ft 3.8 m
4.0m 19 ft 5.8 m
45° 90°
- 3
13 ft 1 in
-
(4.0m)
39 ft 4-21/64 in (12.0m)
39 ft 4 - 21/64 in
(12.0m)
5 ft (1.5m)
44 ft. (13.4m)
98 ft. (29.9m)
54 ft. (16.5m)
Maximum Vertical Length
6 in / 8 in *
(150 / 200 mm)
98 ft
30.0 m
4 13/16 in
98 ft
30.0 m
4 13/16 in
98 ft
-
4 13/16 in
FIGURE 6-34
37
8 in (200 mm)
98 ft
30.0 m
4 13/16 in
98 ft
30.0 m
4 13/16 in
98 ft
30.0 m
4 13/16 in
P/N 240011662, Rev. D [06/30/2017]
30.0 m
30.0 m
30.0 m