AERCO BMK 2000DF - Manual (Page 23)

Benchmark 1500DF - 2000DF Boilers
CHAPTER 2 – INSTALLATION
OMM-0098_0A AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 23 of 196
GF-144 Ph.: 800-526-0288 04/01/2014
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:
• NATURAL GAS: The external natural gas regulator must be capable of regulating
100,000 – 2,120,000 BTU/HR of natural gas while maintaining a gas pressure of 8.0”
W.C. minimum to the unit.
• PROPANE GAS: The external propane gas regulator must be capable of regulating
100,000 – 2,120,000 BTU/HR of propane gas while maintaining a gas pressure of 4.0”
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
NATURAL GAS INLET
NATURAL GAS PRESSURE
REGULATOR
PROPANE
MANUAL SHUT-
OFF VALVE
NATURAL
GAS
SUPPLY
PROPANE
SUPPLY
PROPANE GAS
PRESSURE
REGULATOR
NATURAL GAS MANUAL
SHUT-OFF VALVE