AERCO Control System (ACS) - Manual (Page 48)

MC2: 04/23/13 Page 48 of 144
GF-131
AERCO Control System (ACS)
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Installation, Operation, and Maintenance Manual
OMM-0081_0D
If the Sensor is not connected, the second line of the display will show NOT CONNECTED. The
Outdoor Air Sensor MUST be connected when operating in the Outdoor Reset Mode.
3.4.4 I/O STATUS
I/O (Input/Output) STATUS is displayed as a hexadecimal number. The meaning of each bit is
as indicated below. The higher 4 bits, or most significant digit (MSD), indicate which inputs are
activated. The lower 4 bits, or least significant digit (LSD), indicate which relay outputs are
activated. See Appendix B for full list.
Value When Set:
3.4.5 RETURN TEMP
The RETURN TEMP (°F) option is displayed only if an optional Return Sensor is installed in the
boiler water return line. When installed, it is connected to terminals 5 and 6 on the ACS. This
optional sensor is used for monitoring purposes, as well as for Plant DT limit operation.
3.4.6 NETWORK BOILER OUTLET TEMPERATURE
When BLR CNTL SELECT is set to C-More or BCM, the outlet temperature of the boilers
connected may be viewed here. Press the Change Key to view the other temperatures. Press
Enter to stop at a particular boiler temperature.
3.4.7 NETWORK BOILER ERROR CODE
When BLR CNTL SELECT is set to C-More or BCM, the Status or Error Codes of the boiler may
be viewed here. Press the Change Key and then, Up or Down keys to view the other
temperatures. Press Enter to stop at a particular boiler code. See Appendix B for definition of
codes.
3.5 SETUP MENU
The SETUP MENU permits the operator to set the unit password which is required to change
any of the menu options. To prevent unauthorized use, a previously entered password entry will
time-out after 1 hour. Therefore, the password must be re-entered when required. In addition to
Bit
3
Bit
2
Bit
1
Bit
0
8 4 2 1
If LSD = 0: All Relay Outputs Off
If LSD = 1: Aux Relay On
If LSD = 2: Fault Relay On
If LSD = 3: Aux and Fault Relays On
If LSD = 4: System Relay On
If LSD = 5: System and Aux Relays On
If LSD = 6: System and Fault Relays On
If LSD = 7: Aux, Fault, and System
Relays On
If LSD = 8-16: Not Valid
LSD
Bit
3
Bit
2
Bit
1
Bit
0
8 4 2 1
If MSD = 0: All Inputs Open
If MSD = 1: Setback Closed
If MSD = 2: Interlock 2 Closed
If MSD = 3: Setback and Interlock 2 Closed
If MSD = 4: Interlock 1 Closed
If MSD = 5: Setback and Interlock 1 Closed
If MSD = 6: Interlock 1 and Interlock 2 Closed
If MSD = 7: Setback, Interlock 2,
and Interlock 2 Closed
If MSD = 8-16: Not Valid
MSD