AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 17)

CHAPTER 2: INSTALLATION
PR2: 05/09/12 Page 17 of 162
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
Gas Supply Specifications. 2.7.1
The gas supply input specifications to the unit for Natural Gas are as follows:
Natural Gas - The maximum static pressure to the unit must not exceed 14” W.C.. The gas
supply pressure to the unit must be of sufficient capacity to provide 1500 cfh while
maintaining the gas pressure at 4.0 inches W.C. for FM, or 4.2 inches W.C. for IRI gas
trains.
Propane - The maximum static pressure to the unit must not exceed 14” W.C.. The gas
supply pressure to the unit must be of sufficient capacity to provide 600 cfh while
maintaining the gas pressure at 4.0 inches W.C. for FM, or 4.2 inches 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 is 4 inches W.C. for both FM and IRI gas trains when the unit is
firing at maximum input. The gas supply pressure to the unit must be of sufficient capacity to
provide 1500 cfh while maintaining the gas pressure at 4 inches W.C. for FM or IRI gas trains.
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.
NATURAL
GAS
SUPPLY
PROPANE
SUPPLY
1-1/2" MANUAL
SHUTOFF
VALVES
DIRT
TRAPS
Figure 2-6: Manual Gas Shut-Off Valve Locations