Abbreviations and Explanations
The 19XL machines use HC FC-2 2 and HFC-134a refrige rant. When referen cing refrigerant
charges in this manual , t he HC FC-22 charge will be listed first and the HFC-1 34a value will be
shown next to it in [ ].
Words printed in all capital letters or i n italics may b e viewed on the LID.
The PSIO software versio n number of your 19XL unit will be located on the fron t cover.
Frequently used abb r ev iat ions in this manual inc lu de:
CCN Carrier Comfort Network LID Local Interface Device
CCW Counterclockwise LCW Leaving Chilled Water
CW Clockwise OLTA Overload Trip Amps
ECW Entering Chilled Water PIC Pro duct Integrated Control
ECDW Entering Condenser Water PSIO Processor Sensor Input/Output Module
EMS Energy Management System RLA Rated Load Amps
HGBP Hot Gas Bypass SCR S ilicon Control Rectifier
I/O Input/Output SI International System of Units
LCD Liquid Cryst al Display SMM Starter Management Modul e
LCDW Leaving Condenser Water TXV Thermal Expan sion Valve
LED Light-E m it ting Di ode