AAON VCCX2 User Manual

51VCCX2 Controller Technical Guide
SEQUENCE OF OPERATIONS
Trend Logs
VCCX2 Controller Trend Logs
VCCX2 CONTROLLER TREND LOGS
DESCRIPTION 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 Airow CFM OACFM (kCFM)
Supply Airow CFM SACFM (kCFM)
Return Airow CFM RACFM (kCFM)
Exhaust Airow 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 11: VCCX2 Controller Trend Logs
RSMV/RSMD/RSMZ Trend Logs
RSM Trend Logs
There can be as many as four RSMVs, four RSMDs, or six RSMZs
on a unit, with each RSM controlling up to two compressors and
condensers. These can be referred to as modules 1, 2, 3, and 4 or as
modules A, B, C, and D. Various items in the trend logs can refer
to dierent modules and dierent compressor/condensers on each
module. For instance:
• 1A1: Stat refers to the status of Module 1/Compressor 1
• 4D1 would be Module 4/Compressor 1.
Likewise, 1SuctTmp1 refers to the suction (saturation) temperature
of Module 1/Compressor 1, while 3SucTmp2 refers to the suction
(saturation) temperature of Module 3/Compressor 2. Several trend
log items will use this pattern to identify the status of values related
to certain modules and the compressors or condensers on those
modules.
RSMZ MODULE TREND LOGS (TYPICAL OF 4 RSM
MODULES)
DESCRIPTION ABBREVIATION (UNIT)
System Status SYSState (Bit String)*
System Command SYSCmd ((Bit String)*
A1 Compressor Modulating Position 1Comp1Perc (%)
A1 Condenser Fan Position 1CondFan (%)
A1 Discharge Pressure 1DisPrs (PSI)
A1 Discharge Line Temperature 1DisLnTmp (ºF)
A1 Suction Pressure 1SucPr (PSI)
A1 Suction Line Temperature 1SucLnTmp (ºF)
A1 Saturation Temperature 1SatTmp (ºF)
A1 Superheat 1Superheat (ºF)
A1 Expansion Valve Position 1EEV1Pos (%)
A1 Compressor Current 1CompCur (Amps)
A1 Compressor Status 1Comp1Stat (Bit String)*
A1 Compressor VFD Status 1VFDStat (Bit String)*
A1 RSM Alarms 1RSMAlrms (Bit String)*
A1 VFD Alarms 1 1VFDAlrm1 (Bit String)*
A1 VFD Alarms 2 1VFDAlrm2 (Bit String)*
A1 Subcooling Temperature 1Subcool (ºF)
* Bit String and Enumerated Value information and interpretation is
explained in the paragraphs and tables at the end of this section.
Table 12: RSMZ Module Trend Log

AAON VCCX2 Specifications

General

Brand	AAON
Model	VCCX2
Category	Controller
Language	English