User Manual

RECON Water Heaters Installation, Operation & Maintenance Manual
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OMM-0103_0A AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 Page 11 of 178
GF-147 Phone: [phone] PRI: 10/28/2014
Phrases, Abbreviations and Acronyms – Continued
Phrase, Abbreviation
or Acronym
Meaning
Terminating Resistor
A resistor placed at each end of a daisy-chain or multi-drop network
in order to prevent reflections that may cause invalid data in the
communication
VAC Volts, Alternating Current
VDC Volts, Direct Current
VFD Vacuum Fluorescent Display, or Variable Frequency Drive
W Watt
W.C. Water Column
WHM Water Heater Management
µA Micro amp (1 million
th
of an ampere)