Abbreviations And Explanations - Carrier PC211 Start-Up, Operation And Maintenance Instructions Manual

Frequently used abbreviations in this manual include:
CCN — Carrier Comfort Network
CCW — Counterclockwise
CW — Clockwise
ECW — Entering Chilled Water
ECDW — Entering Condenser Water
EMS — Energy Management System
HGBP — Hot Gas Bypass
I/O — Input/Output
LCD — Liquid Crystal Display
LCDW — Leaving Condenser Water
LED — Light-Emitting Diode
The 19XL machines use HCFC-22 and HFC-134a refrigerant. When referencing refrigerant
charges in this manual, the HCFC-22 charge will be listed first and the HFC-134a value will be
shown next to it in [ ].
Words printed in all capital letters or in italics may be viewed on the LID.
The PSIO software version number of your 19XL unit will be located on the front cover.

Abbreviations and Explanations

LID
LCW
OLTA
PIC
PSIO
RLA
SCR
SI
SMM
TXV
— Local Interface Device
— Leaving Chilled Water
— Overload Trip Amps
— Product Integrated Control
— Processor Sensor Input/Output Module
— Rated Load Amps
— Silicon Control Rectifier
— International System of Units
— Starter Management Module
— Thermal Expansion Valve