Benchmark 1500 - 2000 Boilers
CHAPTER 2 – INSTALLATION
Page 24 of 182 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0097_0E
10/01/2015 Ph.: 800-526-0288 GF-142
2.8.3 External Gas Supply Regulator
An external gas pressure regulator is required on the gas inlet piping under most conditions
(see sections 2.8.3.1 and 2.8.3.2, below). Regulators must conform to the following
specifications:
• The external natural gas regulator must be capable of regulating 100,000 – 2,120,000
BTU/HR (29.3 – 621 kW) of natural gas while maintaining a gas pressure of 4.0” W.C.
(996 Pa) minimum to the unit.
• A lock-up style regulator MUST be used when gas supply pressure will exceed 14”
W.C. (3487 Pa)
2.8.3.1
Massachusetts Installations Only
For Massachusetts installations, a mandatory external gas supply regulator must be positioned
as shown in Figure 2-7. 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.
2.8.3.2
All Installations (Except Massachusetts)
For multi-unit installations (other than Massachusetts) that EXCEED 7” W.C. (1744 Pa) gas
pressure, an external gas supply regulator, as shown in Figure 2-7, is highly recommended. No
regulator is required for gas pressures below 7” W.C. (1744 Pa) of pressure. Consult the local
gas utility for detailed requirements concerning venting of the supply gas regulator.
Figure 2-7: Manual Gas Shut-Off Valve Location
NOTE
It is the responsibility of the customer to source and purchase the
appropriate gas regulator as described above. However, AERCO
offers for sale an appropriate regulator, which may be ordered at
the time of unit purchase or separately. Contact AERCO for more
information.
GAS PRESSURE REGULATOR
MANUAL
SHUT-OFF
VALVE
NATURAL GAS
INLET
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