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VCCX2 Controller Technical Guide
VCCX2 CONTROLLER TREND LOGS
Item Description
Log Abbreviation
(Unit)
Date
Date (Day Month)
Time
Time (24 Hr.)
Mode of Operation
Mode (Enumerated)*
HVAC Mode
HVAC (Enumerated)*
Space Temperature
Space (ºF)
Indoor Humidity
InRH (%)
Mode Cooling Setpoint
CSP (ºF)
Mode Heating Setpoint
HSP (ºF)
Supply Air Temperature
SAT (ºF)
Supply Air Setpoint
SATSP (ºF)
Coil (Saturation) Temp Setpoint
CoilSP (ºF)
Return Air Temperature
RAT (ºF)
Return Air Humidity
RA RH (%)
Outdoor Air Temperature
OAT (ºF)
Outdoor Air Humidity
OA RH (%)
Outdoor Air Wetbulb
OA WB (ºF)
Outdoor Air Dewpoint
OA DP (ºF)
Carbon Dioxide
CO2 (PPM)
Outdoor Airflow CFM
OACFM (kCFM)
Supply Airflow CFM
SACFM (kCFM)
Return Airflow CFM
RACFM (kCFM)
Exhaust Airflow CFM
EXCFM (kCFM)
Building Pressure
BldPr (WG”)
Duct Static Pressure
Static (WG”)
MHGRV Valve Position
ReHeat
MODGAS Valve Position
ModGas
Main Fan Speed VFD Signal
FanVFD (%)
Economizer Position
Econo (%)
Modulating Heat Signal
ModHeat (%)
Building Pres. Relief VFD Signal
Relief (%)
Modulating Cooling Signal
ModCool (%)
Sensor Alarms
AlrmGrp1 (Bit String)*
Mechanical Alarms
AlrmGrp2 (Bit String)*
Temp Limit and Sump Drain Alarms
AlrmGrp3 (Bit String)*
Missing Module Alarms
AlrmGrp4 (Bit String)*
Refrigeration Module Alarms
AlrmGrp5 (Bit String)*
Binary Inputs Status
Bin IN (Bit String)*
Relays Status of VCCX2 and EM1
Main Rly (Bit String)*
Relays Status of 12 Relay
Expansion Module
Exp Rly (Bit String)*
* Bit String and Enumeration Value information and interpretation
is explained in the paragraphs and tables at the end of this section.
Table 5: VCCX2 Controller Trend Logs
SEQUENCE OF OPERATIONS
VCCX2 Controller Trend Logs