26
ACZ 010A through 039A IOMM ACZ1
Inputs/Outputs
Table 9, Inputs and Outputs
Analog Inputs
# Description Signal Source Range
2 Evaporator Refrigerant Pressure 0.1 to 0.9 VDC 0 to 132 psi
3 Condenser Refrigerant Pressure 0.1 to 0.9 VDC 3.6to 410 psi
5 Outside Ambient Temperature
Thermister (10k at 77
°
F, 25
°
C)
-58 to 212°F
Analog Outputs
# Description Output Signal Range
1 None
Digital Inputs
# Description Signal Signal
1 Unit OFF Switch 0 VAC (Stop) 24 VAC (Auto)
2 Remote Start/Stop 0 VAC (Stop) 24 VAC (Start)
3 Evaporator Water Flow/Air Flow Switch 0 VAC (No Flow) 24 VAC (Flow)
4 Motor Protection 0 VAC (Fault) 24 VAC (No Fault)
6 Phase Voltage Fault 0 VAC (Fault) 24 VAC (No Fault)
7 Stage 1 Request 0 VAC (Stop) 24 VAC (Start)
8 Stage 2 Request 0 VAC (Stop) 24 VAC (Start)
Digital Outputs
# Description Load Output OFF Output ON
1 Alarm Alarm Indicator Alarm OFF Alarm ON
3 Liquid Line Solenoid Cooling OFF Cooling ON
4 Motor Control Relay #1 Starter Compressor OFF Compressor ON
5 Motor Control Relay #2 Starter Compressor OFF Compressor ON
6 Condenser Fan #1 Fan Contactor Fan OFF Fan ON
7 Condenser Fan #2 Fan Contactor Fan OFF Fan ON
8 Condenser Fan #3 Fan Contactor Fan OFF Fan ON
Setpoints
The setpoints shown in Table 10 are held in a non-volatile memory and remembered during power
off, are factory set to the Default value, and can be adjusted within the value shown in the Range
column.
The PW (password) column indicates the password level that must be entered in order to change the
setpoint. Passwords are as follows:
O = Operator [0100]
M = Manager, M level settings are not normally changed for chilled water air-conditioning
applications.
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