Instruction Manual

Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual
OMM-0082_0J AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 9 of 192
GF-130 Ph.: 800-526-0288 05/21/2014
Phrases, Abbreviations and Acronyms - Continued
Phrase, Abbreviation
or Acronym
Meaning
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 (1 thousand
th
of an ampere)
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
O
2
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
SSOV
Safety Shut Off Valve
TEMP (Temp)
Temperature