Aerco AM 399B 애플리케이션 매뉴얼 - 페이지 18
{카테고리_이름} Aerco AM 399B에 대한 애플리케이션 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Aerco AM 399B 20 페이지. Gas-fired boilers and water heaters venting application
Aerco AM 399B에 대해서도 마찬가지입니다: 애플리케이션 매뉴얼 (8 페이지)
페이지 인쇄
GF-146-V
TAG-0075_0B
3.4. VENT PIPING SIZE
The maximum length is the combined length of straight horizontal and vertical runs, and the
equivalent straight length of fittings. The required lengths for each boiler are as shown on Tables 9
and 10.
Table 9: Required and Maximum Combustion Air Run Lengths
Number of
Modules
Combustion Air
Diameter
Maximum
Combustion Air
Equivalent Feet
(Meters)
Table 10: Maximum Combustion Air Run Lengths
Model No.
Diameter
AM 399
(102 mm)
AM 500
AM 750
(152 mm)
AM 1000
The maximum pressure drop of the combustion air piping is also 60 equivalent feet. See Section
2.2. Note that this does NOT mean the allowed combined pressure drop between the vent and
combustion air is 120 equivalent feet. That is, the vent cannot go above 60 equivalent feet, even if
the combustion air is less than 60 equivalent feet, and vice versa.
EXAMPLES:
1. A 40 foot length of vent pipe and 1 sharp 90° elbow plus a termination rain cap add up to 40 ft. +
10 ft. + 10 ft. = 60 equivalent ft.
2. A 30 foot length of vent pipe and 2 sharp 90° elbows plus a termination rain add up to 30 ft. + (2 x
10 ft.) + 10 ft. = 50 equivalent ft.
Page 18 of 20
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
AM Series Venting
Application Guide
AM 399
2
4"
Equivalent Pipe Lengths Examples
Pipe
Sharp 90°
Elbow
Equiv. Ft (m)
4"
10 ft.
(3.05 m)
6"
10 ft.
(3.05 m)
AM 500
AM 750
2
3
60 ft.
Sweep 90°
45° Elbow
Elbow
Equiv. Ft (m)
Equiv. Ft (m)
5 ft.
5 ft.
(1.5 m)
(1.5 m)
5 ft.
5 ft.
(1.5 m)
(1.5 m)
AM 1000
4
6"
Maximum
Length
Equivalent
Ft (m)
60 ft.
(30.5 m)
60 ft.
(30.5 m)
AM1 04/08/2014