GF-135
Esteem 399 Low NOx Boiler
Chapter 7
OMM-0089_0A
Installation, Operation & Maintenance Manual Gas Piping
Page
46
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
Connecting the Gas Piping (Cont.)
WARNING!
Do not check for gas leaks with an open flame. Use a gas detection
device or bubble test. Failure to check for gas leaks can cause
severe personal injury, death or substantial property damage.
9. Use pipe dope compatible with natural and propane gases. Apply sparingly only to the male
threads of pipe joints so that pipe dope does not block gas flow.
WARNING!
•
Failure to apply pipe dope as detailed above can result in severe
personal injury, death or substantial property damage.
•
Use a two-wrench method of tightening gas piping near the unit
and its gas piping connection. Use one wrench to prevent the
boiler gas line connection from turning and the second to
tighten adjacent piping. Failure to support the boiler gas piping
connection could damage the gas line components.
7.2 NATURAL GAS
7.2.1 Pipe Sizing - Natural Gas
Refer to Table 7-1 for schedule 40 metallic pipe length and diameter requirements for natural
gas, based on rated Esteem 399 Low NOx boiler input (divide by 1,000 to obtain cubic feet per
hour).
•
Table 7-1 is based on Natural Gas with a specific gravity of 0.60 and a pressure drop
through the gas piping of 0.30”W.C..
•
For additional gas piping sizing information, refer to ANSI Z223.1. For Canadian
installations refer to B149.1 or B149.2.
Table 7-1: Natural Gas Piping Sizing
Length of
Pipe in Feet
Capacity of Schedule 40 Metallic Pipe in Cubic Feet of Natural Gas Per Hour
(based on 0.60 specific gravity, 0.30” W.C. pressure drop)
SCH 40
1/2”
3/4”
1”
1-1/4”
1-1/2”
10
132
278
520
1050
1600
20
92
190
350
730
1100
30
73
152
285
590
890
40
63
130
245
500
760
50
56
115
215
440
670
75
45
93
175
360
545
100
38
79
150
305
460
150
31
64
120
250
380
