Fitting Equivalent Lengths; Specific Gravity Correction Factors; Venting; General Guidelines - Burnham 20_PV_I Installation, Operating And Service Instructions

Table 2: Maximum Capacity of Schedule 40 Pipe in CFH For Gas Pressures of 0.5 psig or Less
Length
[Feet]
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
1 0 0
Table 3: Fitting Equivalent Lengths
Fitting
4 5 ° E l l
9 0 ° E l l
T e e ( A s E l b o w )
V. Venting
A.

General Guidelines.

1. Vent system installation must be in accordance with
National Fuel Gas Code, NFPA 54/ANSI Z221.3,
Part 7, Venting of Equipment; and/or CAN/CGA
B149 Installation Codes, Section 7, Venting Systems
and Air Supply for Appliances; or applicable
provisions of local building codes. Contact local
building or fire officials about restrictions and
installation inspection in your area.
2. This appliance requires a Special Gas Vent. Use Vent
Connector and Vent Terminal in Vent Accessory
Carton provided with boiler (See Repair Parts, Key
No. 8). The product is designed to use Burnham
supplied AL 29-4C
components. The following manufacturers offer
®
similar AL 29-4C components and are approved for
use with this product: Heat-Fab Inc. - Saf-T-Vent,
0.3 inch w.c. Pressure Drop
½ ¾
1 3 2 2 7 8
9 2 1 9 0
7 3 1 5 2
6 3 1 3 0
5 6 1 1 5
5 0 1 0 5
4 6 9 6
4 3 9 0
4 0 8 4
3 8 7 9
Nominal Pipe Size
½ ¾ 1
0 . 7 1 1 . 2
1 . 6 2 . 1 2 . 6
3 . 1 4 . 1 5 . 2
®
Stainless Steel vent system
1 1¼
5 2 0 1 , 0 5 0
3 5 0 7 3 0
2 8 5 5 9 0
2 4 5 5 0 0
2 1 5 4 4 0
1 9 5 4 0 0
1 8 0 3 7 0
1 7 0 3 5 0
1 6 0 3 2 0
1 5 0 3 0 5
Table 4: Specific Gravity Correction Factors
S p e c i f i c
G r a v i t y
1¼
0 . 5 0
0 . 5 5
1 . 6
0 . 6 0
3 . 5
0 . 6 5
6 . 9 0 . 7 0
0 . 7 5
0 . 8 0
Flex-L International Inc., - Star-34, Protech Systems,
Inc. - FasNSeal™, and Z-Flex U. S., Inc. - Z-Vent.
The use of these alternate manufacturer's venting
systems will require adapters to connect to the
Burnham supplied vent connector and vent terminal.
These adapters are not supplied with this unit and
should be obtained from the supplier of the alternate
manufacturer's venting system. See Table 5 for
complete list of Burnham Vent System Components.
Do not use this appliance with nonmetallic
vent systems such as Hart & Cooley
Ultravent, Plexco Plexvent, or Selkirk-
Metalbestos Sel-Vent.
9
0.5 inch w.c. Pressure Drop
½ ¾
1 7 5 3 6 0
1 2 0 2 5 0
9 7 2 0 0
8 2 1 7 0
7 3 1 5 1
6 6 1 3 8
6 1 1 2 5
5 7 1 1 8
5 3 1 1 0
5 0 1 0 3
C o r r e c t i o n S p e c i f i c
F a c t o r G r a v i t y
1 . 1 0 1 . 3 0
1 . 0 4 1 . 4 0
1 . 0 0 1 . 5 0
0 . 9 6 1 . 6 0
0 . 9 3 1 . 7 0
0 . 9 0
0 . 8 7
WARNING
1 1¼
6 8 0 1 , 4 0 0
4 6 5 9 5 0
3 7 5 7 7 0
3 2 0 6 6 0
2 8 5 5 8 0
2 6 0 5 3 0
2 4 0 4 9 0
2 2 0 4 6 0
2 0 5 4 3 0
1 9 5 4 0 0
C o r r e c t i o n
F a c t o r
1 . 0 7
1 . 0 4
1 . 0 0
0 . 9 7
0 . 9 4