Commonly Used Acronyms - Trane S*HF*20-75 Troubleshooting Manual

Commonly Used Acronyms

For convenience, a number of acronyms and abbreviations are used throughout this manual. These acronyms are
alphabetically listed and defined below.
Table 1. Acronyms
act = active, actuator
AH = air handler
annunc = annunciate
AS = airside
aux = auxiliary
BAS = Building Automation System
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BCI = BACnet Communication Interface Module
ccfm = cfm/100 (ex. 120.5 CCFM = 12050 CFM)
cfm = cubic-feet-per-minute
cfg = configured, configuration
ckt = circuit
cmd = command
comp(s) = compressor, compressors
cond(s) = condenser, condensers
config = configured, configuration
ctrl = control
CV = constant volume
CVDA = Const. Volume airflow/Discharge Air temp ctrl
CVZT = Const. Volume airflow/Zone Temp ctrl
cw = clockwise
cww = counterclockwise
cy = cycle
DCV = Demand Control Ventilation
dflt = default
diag = diagnostic
dmpr = damper
DWU = daytime warm-up
DX = direct expansion (compressor control)
E/A, EA = exhaust air
ECEM = Exhaust Comparative Enthalpy Module
econ = economizer, economizing
ent = entering
evap = evaporator
F/A, FA = fresh air
funct = function
GBAS = Generic Building Automation System (module)
HEAT = heat, heater, Heat (module)
HGBP = hot gas bypass
HGP = hot gas bypass
hi = high
HI = Human Interface (module)
HO = History Only (Diagnostic)
HVAC = heating, ventilation and air conditioning
ICS = Integrated Comfort System
RT-SVP07B-EN
IGV = inlet guide vanes
Indep = Independent
INFO = Information Only (Diagnostic)
I/O = input/output
IOM = installation/operation/ maintenance manual
IPAK = IntelliPak I™, IntelliPak II™
IPC = interprocessor communications
IPCB = Interprocessor Communications Bridge (mod)
iwc = inches water column
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LCI = LonTalk Communication Interface Module
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LCI-I = LonTalk Communication Interface for IPAK
LH = left-hand
lo = low
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LON = LonWorks (Echelon , etc.)
LRE = leaving recovery exhaust
max = maximum
manif = manifolded
MCM = Multiple Circuit Module
MDM = Modulating Dehumidification Module
min = minimum, minute
misc = miscellaneous
mod = modulating, module
MPM = Multi-Purpose Module
MWU = morning warm-up
NSB = Night Setback Panel
num = number
O/A, OA = outside air
occ = occupied
OVRD = override
PAR = partial system disable, auto reset
PMR = partial system disable, manual reset
pos = position
O/A, OA = outside air
pot = potentiometer
PPM = parts per million
press = pressure
prop = proportional
psig = pounds-per-square-inch gauge pressure
PWS = part-winding start
R/A, RA = return air
refrig = refrigerant
RHI = Remote Human Interface (module)
rpm = revolutions-per-minute
RH = right-hand, relative humidity
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