AERCO Control System (ACS)
CHAPTER 4
: Programing ACS Operating Modes
Page 78 of 139
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
11/22/2017
GF-131
Phone: 800-526-0288
OMM-0081_0F
The ACS will continuously poll the boilers at prescribed intervals. Therefore, if a boiler is placed
off-line and then placed back on-line, it will again be recognized by the ACS during the next
polling cycle.
TESTING THE SYSTEM USING THE C-MORE CONTROLS
4.8
The following procedure places a load on the system and will begin firing the boilers. At this
point it is very important to make sure the system pumps are running. After system has been
initialized as described in
paragraph 4.5
, proceed as shown in
Instruction 4.8
on next page:
IMPORTANT!
Prior to performing these tests, view and record the PRESENT settings stored in the ACS for
HEADER SET MODE
and
INTERNAL SETPT.
These settings are located in the Field Adjust
Menu and MUST be restored to these values upon completion of following tests.
NOTE
On a cold start up, if the system is designed with a return temperature
sensor with the intent to activate the plant Delta-Temperature (Delta-T)
Limit function, consider disabling the return sensor. During a cold start, the
cold water may be cold enough to trip the High Delta-T alarm and shut
down the plant. In this case you can set the Return Sensor Mode to OFF to
temporarily disable the Plant Delta-T function and then set it to NORMAL
after the return water has warmed up.
Testing the System Using the C-More Controls
1.
Turn off the ACS by pressing the ON/OFF key. The ON LED will turn off.
2.
Using the MENU key, select the
FIELD ADJUST MENU
and scroll to the
HEADER SET
MODE
option, The second line of the display will show the current setting stored in
memory (
CONSTANT SETPT, OUTDOOR RESET,
or
REMOTE SETPT).
3.
If
CONSTANT SETPT
is not currently selected, press the CHANGE key. Select the
CONSTANT SETPT
mode using the ▲ or ▼ arrow key. When selected, store the
change by pressing the ENTER key.
4.
Next, scroll to the
INTERNAL SETPT
menu option. The second line of the display will
show the current Internal Setpoint temperature (°F) stored in memory.
5.
Press the CHANGE key. Set the
INTERNAL SETPT
temperature to 180°F using the ▲
and ▼ arrow keys. When set, store the change by pressing the ENTER key.
6.
Turn on the ACS by pressing the ON/OFF key. The ON indicator will light and the boiler
plant will start to operate.
7.
Using the MENU key on the ACS, scroll to the OPERATING MENU. The first line of the
display will show the Header Temperature. The second line of the display will show the
Firing Rate % and the number of Units (boilers) firing.
8.
When all boilers have reached at least a 55% firing rate, any boilers that have not
started have not been identified by the ACS. (Cont.)