Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL
CHAPTER 2 – INSTALLATION
Page
22
of
170
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0119_0A
11/03/2016
Ph.: 800-526-0288
GF-130-I
2.8.3 External Gas Supply Regulator
An external gas pressure regulator is required on the gas inlet piping under most conditions.
Regulators must conform to the following specifications:
•
The external natural gas regulator must be capable of regulating
49,000 – 1,020,000
BTU/HR (14.3 – 299 kW)
of natural gas while maintaining a gas pressure of
4.0” W.C.
(1.00
kPa)
minimum to the unit.
•
A lock-up style regulator MUST be used when gas supply pressure will
exceed 14”
W.C. (3.49
kPa)
For installations with 3 or more units that
EXCEED 7” W.C. (1.74 kPa)
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. (1.74 kPa)
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.
2.9 AC ELECTRICAL POWER WIRING
The AERCO Benchmark Electrical Power Wiring Guide, GF-2065, must be consulted prior to
connecting any AC power wiring to the unit. External AC power connections are made to the
unit inside the Power Box on the front of the unit. Remove the front panel to access the Power
GAS PRESSURE REGULATOR
MANUAL
SHUT-OFF
VALVE
NATURAL
GAS
INLET
DIRT TRAP
