AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 46)

GF-135 Esteem 399 Low NOx Boiler
Chapter 7
OMM-0089_0A
Installation, Operation & Maintenance Manual Gas Piping
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
Page 46 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288