Benchmark 1500 - 2000 Boilers
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OMM-0097_0D AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 9 of 188
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Phrases, Abbreviations and Acronyms – Continued
Phrase, Abbreviation or
Acronym
Meaning
IGST Board Ignition/Stepper Board contained in C-More Control Box
INTLK (INTL’K) Interlock
I/O Input/Output
I/O Box
Input/Output (I/O) Box currently used on Benchmark, Innovation and
KC1000 Series products
IP Internet Protocol
IRI
Industrial Risk Insurers. A now discontinued code used to define gas
trains containing two SSOVs and a solenoid operated vent valve.
ISO Isolated
LED Light Emitting Diode
LN Low NOx
MA (mA) Milliampere (0.001 Amp), one thousandth of an amp
MAX (Max) Maximum
MIN (Min) Minimum
Modbus®
A serial, half-duplex data transmission protocol developed by AEG
Modicon
NC (N.C.) Normally Closed
NO (N.O.) Normally Open
NOx Nitrogen Oxide
NPT National Pipe Thread
O2 Oxygen
O.D. Outside Diameter
PMC Board
A Primary Micro-Controller (PMC) board is contained in the C-More
Control Box used on all Benchmark units.
PPM Parts Per Million
PTP Point-to-Point (usually over RS-232 networks)
PWM Pulse Width Modulation
REF (Ref) Reference
RES. Resistive
RS-232
(or EIA-232)
A standard for serial, full-duplex (FDX) transmission of data based on the
RS-232 Standard
RS-422
(or EIA-422)
A standard for serial, full-duplex (FDX) transmission of data based on the
RS-422 Standard
RS-485
(or EIA-485)
A standard for serial, half-duplex (HDX) transmission of data based on
the RS-485 Standard
RTN (Rtn) Return
SETPT (Setpt) Setpoint Temperature
SHLD (Shld) Shield
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