AERCO BMK 2.0 LN Dual Fuel Serial G-11-2402 and UP - Manual (Page 17)

CHAPTER 2: INSTALLATION
PR2: 04/22/13 Page 17 of 160
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
Gas Supply Specifications. 2.7.1
The maximum static pressure to the unit must not exceed 14” W.C. The specifications for
natural gas and propane are as follows:
Natural Gas:
The gas supply pressure to the unit must be of sufficient capacity to provide 2000 cfh while
maintaining the gas pressure at 4.0" W.C. for FM or 5.0" W.C. for IRI gas trains.
Propane:
The gas supply pressure to the unit must be of sufficient capacity to provide 800 cfh while
maintaining the gas pressure at 4.0" W.C. for FM or 5.0" W.C. for IRI gas trains.
The maximum static pressure to the unit must not exceed 14” W.C.. The minimum operating
gas pressure for natural gas and propane is 8.5 inches W.C. for both FM and IRI gas trains
when the unit is firing at maximum input.
Manual Gas Shutoff Valve 2.7.2
A manual shut-off valve must be installed in the gas supply line upstream of the Boiler as shown
in Figure 2-6. Maximum allowable gas pressure to the Boiler is 14” W.C.
2" MANUAL
SHUTOFF
VALVES
NATURAL
GAS SUPPLY
PROPANE
SUPPLY
DIRT
TRAPS
Figure 2-6: Manual Gas Shut-Off Valve Location
IRI Gas Train Kit 2.7.3
The IRI gas train is an optional gas train configuration which is required in some areas for code