Benchmark 2500 - 3000 Boilers
CHAPTER 2 – INSTALLATION
OMM-0094_0E
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
23
of
204
GF-137
Ph.: 800-526-0288
03/20/2014
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 200,000 – 3,180,000
BTU/HR of natural gas while maintaining a gas pressure of 8.0” W.C. minimum to the
unit.
•
A lock-up style regulator MUST be used when gas supply pressure will exceed 14” W.C.
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. gas pressure, a
separate external gas supply regulator, as shown in Figure 2-7, is highly recommended. No
regulator is required for gas pressures below 7” W.C. 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.
NATURAL GAS INLET
GAS PRESSURE REGULATOR
2” MANUAL
SHUT-OFF
VALVE
NATURAL
GAS SUPPLY
