Benchmark 2.0 LN Installation, Operation & Maintenance Manual
CHAPTER 2 – INSTALLATION
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22
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168
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0046_0J
06/18/2015
Phone: 800-526-0288
GF-123
piping thoroughly using a soap and water solution or suitable equivalent. The gas piping used
must meet all applicable codes.
2.7.1 Gas Supply Specifications.
The specifications for natural gas are as follows:
•
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 2000 cfh while
maintaining the gas pressure at 4.0" W.C. for FM or 5.0" W.C. for IRI gas trains.
2.7.2 Manual Gas Shutoff Valve
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.
NOTE
Paragraph 2.7.3 applies only to boiler installations within the Commonwealth
of Massachusetts.
2.7.3 External Gas Supply Regulator
For Massachusetts installations, a mandatory external gas supply regulator must be positioned as
shown in Figure 2-6. The gas supply regulator must be properly vented to outdoors. Consult the
local gas utility for detailed requirements concerning venting of the supply gas regulator.
NOTE
The external regulator must be capable of regulating 1,500,000 BTU/HR of
natural gas while maintaining a gas pressure of 4.0” W.C. to the boiler.
CAUTION
A lock-up style regulator MUST be used when gas supply pressure will
exceed 14” W.C.
GAS
SUPPLY
DIRT
TRAP
2" MANUAL
SHUTOFF
VALVE
GAS PRESS.
REGULATOR
(REQUIRED FOR
MASSACHUSETTS
INSTALLATIONS)
Figure 2-6: Manual Gas Shut-Off Valve Location
