4 RT-SVP04F-EN
General Information
Note: Echelon, LON, LONWORKS, LonBuilder, NodeBuilder, LonManager, LonTalk,
LonUsers, Neuron, 3120, 3150, the Echelon logo, and the LonUsers logo are
trademarks of Echelon Corporation registered in the United States and other
countries. LonLink, LonResponse, LonSupport, LonMaker, and LonPoint are
trademarks of Echelon Corporation.
Note: BACnet® is a registered trademark of the American Society of Heating,
Refrigeration and Air-conditioning Engineers Inc. (ASHRAE.)
Glossary of Terms
Carefully review these definitions since they are used throughout this document and
the Installation, Operation, Maintenance Guide (IOM). Knowledge of these terms is
essential in gaining an understanding of how these units operate.
Active SETPOINT. The SETPOINT which is currently being used for control by the
SETPOINT source selection.
BACnet
®
. An open, device networking communications protocol for controls. This
protocol utilizes BACnet and ANSI/ASHRAE Standard 135-2004 protocol which provides
building owners the capability to connect various types of building control systems or
subsystems together.
Pot = potentiometer SZ = single-zone (unit airflow)
PPM = parts per million TCI = Tracer communications interface (module)
HEAT = where all caps HEAT (module) Press = pressure
Propor = proportional Temp = temperature
psig = pounds-per-square-inch gauge pressure UCM = Unit Control (Module)
PWS = part-winding start Unocc = unoccupied
R/A = return air VAV = variable air volume
Refrig = refrigerant VCM = ventilation control module
RH = right-hand VDC = volts DC
RHI = Remote Human Interface Ventil = ventilation
rpm = revolutions-per-minute VFD = variable frequency drive
RT = rooftop unit VOM = ventilation override module
RTM = rooftop module VVDA=Variable Speed Fan (VAV)/Discharge Air Temp Control
SA = supply air W/ = with
SAP = supply air pressure w.c. = water column
Sat = saturated WU = warmup
SCM = Single Compressor Module XL = across-the-line start
Setpt = SETPOINT
SF = supply fan
SRC = source
Stg = stage
Stnd = standard
STP = SETPOINT
Sw = switch
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