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Acronyms and Abbreviations
Table 14. Acronyms and abbreviations (continued)
Item
Locked Rotor Amperes
LRA
m
minute
Max
Maximum
Min
Minimum
Monday
MON
NEMA
National Electrical Manufacturers Association
NFPA
National Fire Protection Association
Negative Temperature Coefficient
NTC
OA
Outside Ambient
Outside ambient Air Temperature
OAT
OD
Outside Diameter
Open on Rise Differential pressure
ORD
Open on Rise Inlet pressure
ORI
P
Process
PD
Pressure Differential
PE
Protective Earth
Programmable Logic Controller
PLC
PMD
Panel Mounted Disconnect
Polyolester Oil
POE
ppm
parts per million
pressure
Pres
psi
pounds per square inch
PumpDown
Pump Down
PumpMod
Pump Module
PWM
Pulse Width Modulation
Pwrup Stg Up
Power Up Stage Up
Refrigeration
REFRIG
RemOff
Remote Off
RMA
Returned Merchandise Authorization
A–2
Expansion
Table 14. Acronyms and abbreviations (continued)
Item
Rot
Rotation
rpm
revolutions per minute
Redundant Pump
RP
s
second
Saturday
SAT
Saturated Discharge Temperature
SDT
SP
Set Point
SSS
Solid State Starter
Saturated Suction Temperature
SST
Stating Point
StartPt
Sunday
SUN
Sys
System
Temp
Temperature
Temperatures
TEMPS
Thursday
THU
TT
Twin Turbine
Tuesday
TUE
Thermal Expansion Valve
TXV
U1, U2
binary 1, binary 2
UL
Underwriters Laboratories
UV
Ultraviolet
Volts, Alternating Current
VAC
Volts, Direct Current
VDC
Variable Frequency Drive
VFD
Wednesday
WED
Y1, Y2
analog output: y1 = condenser
analog output
Y4
Expansion
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