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McQuay OM 751 5
Introduction
Acronyms/Abbreviations
The following table list acronyms and abbreviations that may or may not be used within this
manual. Other abbreviations for keypad displays and parameters can be found in Table 8 on
page 14 and Table 26 on page 47.
Table 5: Acronyms and abbreviations
Description
Acronym/
Abr.
Air Fan AF
Auxiliary Heat End Differential AHED
Auxiliary Heat Start Differential AHSD
American Standard Code for Information Interchange ASCII
American Society of Heating, Refrigerating, and Air
Conditioning Engineers, Inc
ASHRAE
Compressorized Cooling Lockout CCLO
Space CO
2
Setpoint CO
2
S
Chilled Water CW
Chilled Water Valve Position CWVP
Discharge Air DA
Discharge Air High Limit DAHL
Discharge Air Temperature DAT
Discharge Air Temperature Setpoint DATS
Demand Controlled Ventilation
DCV
DX Cooling Discharge Air Low Limit DXLL
Economizer Compare Differential ECD
Economizer IA/OA Enthalpy Differential EED
Economizer OA Enthalpy Setpoint EES
Emergency Heat Setpoint EHS
Exhaust Interlock OAD Min Position Setpoint EOAD
Outdoor Air Temperature Setpoint EOAT
End-of-Cycle EOC
EOC OAT Low Setpoint EOCS
Outdoor Air Humidity Output EORH
Space Humidity Setpoint ERH
Economizer IA/OA Temp Differential ETD
Economizer OA Temp Setpoint ETS
Source (water in) Temperature EWIT
Face and Bypass Damper Position FBDP
Federal Communications Commission FCC
Face and Bypass F & BP
Heating, Ventilating, Air Conditioning Refrigeration HVACR
Heating EOC Valve Setpoint HEOC
Hot Water HW
Indoor Air IA
Indoor Air Fan IAF
Indoor Air Temperature IAT
Light Emitting Diode LED
Local User Interface LUI
Mixed Air Low Limit MALL
Mechanical Cooling Low Limit Setpoint MCLL
National Electric Code NEC
Outside Air OA
Outside Air Dampers OAD
Energize Exhaust Fan OAD Setpoint OADE
OAD Min Position High-Speed Setpoint OADH
OAD Min Position Low-Speed Setpoint OADL
OAD Min Position Med-Speed Setpoint OADM
Outdoor Air Damper Position OADP
OAD Lockout Setpoint OALS
OAD Max Position Setpoint OAMX
Outside Air Temperature OAT