AERCO AM Series Boiler User Manual - Manual (Page 82)

AM Series Boilers and Water Heaters
CHAPTER 3 – INSTALLATION
Page 82 of 156 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0100_0B
PRI - 07/14/14
Ph.: 800-526-0288
GF-146
3.17.2 Natural Gas Pipe Sizing
Refer to the table below for pipe lengths and diameters. For additional gas pipe sizing
information, refer to ANSI Z223.1 (or B149.1 for Canadian installations).
Table 3-4: Gas Pipe Capacity for Natural Gas
3.17.2.1 Natural Gas Supply Pressure Requirements
• Install 100% lockup gas pressure regulator in supply line if inlet pressure can
exceed 13”W.C. at any time. Adjust lockup regulator for 13” W.C. maximum.
• Pressure required at the gas valve inlet pressure port:
o Maximum 13” W.C. with no flow (lockup) or with appliance off.
o Minimum 3” W.C. with gas flowing (verify during high fire).
3.17.3 Propane Gas Pipe Sizing
Contact gas supplier to size pipes, tanks, and 100% lockup propane gas pressure regulator.
3.17.3.1 Propane Gas Supply Pressure Requirements
• Adjust propane supply regulator provided by the gas supplier for 13”W.C. maximum
pressure.
• Pressure required at the gas valve inlet pressure port:
o Maximum 13” W.C. with no flow (lockup) or with appliance off.
o Minimum 3” W.C. with gas flowing (verify during high fire).
NOTE
Ensure that the high gas pressure regulator is at least 6 to 10 feet
upstream of the appliance.