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Table 1 — Control Inputs and Outputs
LEGEND
DESCRIPTION
ABBREV. TYPE
CONTROLLER I/O NO. DIP SWITCH SETTINGS
Water Econ. Units Air Econ.Units
Switch No. and Position
Inputs SW2 SW3 SW1
Main Controller (PCB1) Addr = 1-16
Supply Air Temperature SAT Analog; 10KMCI 1 1 1 Up 1 Down 1 Up
VFD Duct Static Pressure DSP 4-20mA; Internally Powered 2 2 2 Up 2 Up 2 Down
COL/Safeties —
(Comprs.Status; Resister Bd.)
CMP MUX Analog; 0-10VDC 3 3 3 Up 3 Down 3 Down
Fire Alarm/Shutdown FSD Switch closure 4 4 4 Up 4 Down 4 Down
Condenser WaterflowSwitch CDWF Switch closure 5 5 5 Up 5 Down 5 Down
Remote Occupancy RMTOCC Switch closure 6 6 6 Up 6 Down 6 Down
Duct High Static Limit Switch DHS Switch closure 7 7 7 Up 7 Down 7 Up
Entering Water Temp. Sensor EWT Analog; 5K 8 8 8 Up 8 Down 8 Up
I/O Board (PCB2) Addr = 17-32
Mixed/ReturnAir Sensor MAT/RAT Analog; 10K MCI 1 1 1 Up 1 Down 1 Up
Filter StatusSwitch
(Dirty Filter Detect)
FLTS Switch closure 2 2 2 Up 2 Down 2 Down
PhaseLossMonitor PHASE Switch closure 3 3 3 Up 3 Down 3 Down
External reset RESET 0-10VDC Externally Powered 4 4 4 Up 4 Down 4 Down
Water Econ. FreezeStat FREEZE Switch closure 5 — 5 Up 5 Down 5 Up
DifferentialEnthalpy ENTH Switch closure — 5 5 Up 5 Down 6 Down
Space Zone Sensor(s) SPT Analog; 10K MCI 6 6 6 Up 6 Down 7 Up
VFDBypass Enable BYPASS Switch closure 7 7 7 Up 7 Down 8 Up
Refrigerant Pressure
(Compr.#1)
PRES 4-20mA; Internally Powered 8 8 8 Up 8 Up — —
I/O Board (PCB3) Addr = 33-48
Tower Sump Temp. TWRTEMP Analog; 10K MCI 1 1 1 Up 1 Up 1 Up
Building Pressure BSP 4-20mA; Internally Powered 2 2 2 Up 2 Down 2 Down
Leaving Water Temp. LWT Analog;10K MCI 3 3 3 Up 3 Up 3 Down
Indoor Air Quality IAQ 4-20mA; Internally Powered — 4 4 Up 4 Down 4 Down
Indoor relative Humidity IRH 4-20mA; Internally Powered — 5 5 Up 5 Down 5 Down
Outside Air Temp. OAT Analog;10K MCI — 6 6 Up 6 Up 6 Up
Unassigned —— ——————7Up
Unassigned —— ——————8Up
DESCRIPTION
ABBREV. TYPE
CONTROLLER I/O NO. DIP SWITCH SETTINGS
Water Econ. Units Air Econ.Units
Switch No. and Position
Outputs SW4 SW5 SW6
Main Controller (PCB1)
Compressor #1 Relay CMP1 24VDC Discrete 1 1 1 Either 1 DO —
Compressor #2 Relay CMP2 24VDC Discrete 2 2 2 Either 2 DO —
Compressor #3 Relay CMP3 24VDC Discrete 3 3 3 Either 3 DO —
Compressor #4 Relay CMP4 24VDC Discrete 4 4 4 Either 4 DO —
VFD On/Off SF 24VDC Discrete 5 5 5 Either — 1 DO
VFD Speed Control SPEED 4-20mA modulating 6 6 6 Down — 2 AO
Alarm Pending ALARM1 24VDC Discrete 7 7 7 Either — 3 DO
Service Required ALARM2 24VDC Discrete 8 8 8 Either — 4 DO
I/O Board (PCB2)
Ventilation Output VENTOUT 24VDC Discrete 1 1 1 Either 1 DO —
Terminals Occupied OCCTRM 24VDC Discrete 2 2 2 Either 2 DO —
2-Position\
Reverse Operation Valve
ECONO 4-20mA modulating 3 3 Down 3 AO —
Economizer Damper ECONO 4-20mA modulating — 3 3 Down 3 AO —
Modulating Valve Econ./
Head Pressure Control
MODVLV 4-20mAmodulating 4 4 4 Down 4 AO —
HotWater Coil Valve Control HWV 4-20mA modulating 5 5 5 Down — 1 AO
Heat Interlock Relay HIR 24VDC Discrete 6 6 6 Either — 2 DO
VFDBypass Start BPSS 24VDC Discrete 7 7 7 Either — 3 DO
VAV Terminals Open DAMPERS 24VDC Discrete 8 8 8 Either — 4 DO
I/O Board (PCB3)
Electric Heat Control — Stage #1 HEAT1 24VDC Discrete 1 1 1 Either 1 DO —
Electric Heat Control — Stage #2 HEAT2 24VDC Discrete 2 2 2 Either 2 DO —
Electric Heat Control — Stage #3 HEAT3 24VDC Discrete 3 3 3 Either 3 DO —
Electric Heat Control — Stage #4 HEAT4 24VDC Discrete 4 4 4 Either 4 DO —
Water Pump Request PUMP 24VDC Discrete 5 5 5 Either — 1 DO
Tower Request TOWER 24VDC Discrete 6 6 6 Either — 2 DO
Modulating Exhaust Fan EXH 4-20mAmodulating 7 7 7 Down — 3 AO
External Dehumidification DEHUM 24VDC Discrete 8 8 8 Either — 4 DO
AO — Analog Output
DO — Discreet Output
MCI — Precon Type II Thermistor
VAV — Variable Air Volume
VFD — Variable Frequency Drive