AERCO Control System (ACS) - Manual (Page 41)

MC2: 04/23/13 Page 41 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
2.18 ACS PROGRAMMING FOR USE WITH THE ACS RELAY PANEL
The AERCO CONTROL SYSTEM (ACS) can be programmed for 3 different types of DHW
options. For “Option 1” and “Option 3” operation, the ACS Relay Panel is not needed. It is
needed for Option 2 operation.
Below we will illustrate programming the ACS for a total of 8 boilers with 2 DHW Priority boilers,
2 Building Priority boilers, and the rest Building boilers. Valve 1 is in the boiler outlet header
between the Building Priority boilers and the DHW Priority boilers. Valve 2 is in the boiler outlet
header between the Building boilers and the Building Priority boilers. Program the ACS as
follows:
2.18.1 RS485 Menu
1) In the RS485 Menu be sure to include all the boilers being controlled via Modbus in the
“NUMBER NETWK BLRS” number.
2) When programming “NETW BOILER XX ADDRESS” include the number of DHW Priority
boilers and Building Priority boilers at the end of the addresses up to “NETW BOILER 32
ADDRESS”. For our example, you would program them as follows:
a) Building boilers would be programmed at NETW BOILER 1 ADDRESS, NETW
BOILER 2 ADDRESS, NETW BOILER 3 ADDRESS, and NETW BOILER 4 ADDRESS.
Building Priority boilers would be programmed at NETW BOILER 29 ADDRESS and
NETW BOILER 30 ADDRESS. DHW Priority boilers would be programmed at NETW
BOILER 31 ADDRESS and NETW BOILER 32 ADDRESS.
2.18.2 Configuration Menu
1) For “DHW OPTION” select OPTION 2. This will trigger other sub-menus to appear.
2) Set “NUMBER DHW BLRS” to 4 to indicate that our system will have 4 boilers that can be
used to help with DHW heating – 2 Building Priority and 2 DHW Priority.
3) Set “DHW SIGNAL” to the signal the C-more requires to do DHW heating when it is set for
Combination mode. Currently it is “No Signal”.
4) Set “Valve Wait State” to the state in which you want the DHW boilers to remain while the
valve is opening. If “Off” is selected, they will be commanded to shut down, if they were
running. If “On” is selected and any were fired, they will remain fired while the valve is
opening as long as the Valve End Switch is made within the “Valve Wait Time”(with a default
of 120 seconds). Of course if the boiler interlocks are opened during this time, the boilers
will shut down.
5) Set “NUM DHW PRIORITY” to 2 to indicate that 2 of the boilers are DHW Priority boilers.
The rest will be assumed to be Building Priority boilers.
The steps above will program the ACS to operate with the ACS Relay Panel. You would adjust
the number of boilers to your particular system.