AERCO Control System (ACS) - Manual (Page 69)

MC2: 04/23/13 Page 69 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
4.2.3 Entering Reset Ratio and Building Reference Temperature
The Reset Ratio and Building Reference Temperature (BLDG REF TEMP) are also entered
using options contained in the Field Adjust Menu. These parameters are entered as shown
below:
4.2.4 SELECTING BOILER OPERATING MODE
The Boiler Plant can be set for either Parallel or Sequential Mode operation. The Boiler
Operating Mode is selected in the Configuration Menu as shown below:
Entering Reset Ratio and Building Reference Temperature
1. To enter the required Reset Ratio, scroll through the Field Adjust Menu and select RESET
RATIO.
2. If the desired ratio is not displayed, press the CHANGE key. The display will switch to a
reverse video format indicating that a change is in process.
3. Select the required Reset Ratio using the ▲ or ▼ arrow key.
4. Press the
ENTER key to store the change. The reverse video display will revert to the
normal display format indicating that the change has been store in memory.
5. Next, scroll through the Field Adjust Menu and select BLDG REF TEMP.
6. If the desired BLDG REF TEMP is not displayed, press the
CHANGE key. The display will
switch to a reverse video format.
7. Select the required BLDG REF TEMP using the ▲ or ▼ arrow key.
8. Press the
ENTER key to store the change. The reverse video display will revert to the
normal VFD display format.
9. This completes the required entries in the Field Adjust Menu. Proceed to the next
paragraph and select the Boiler Operating Mode.
Selecting Boiler Operating Mode
1. Using the keypad on the ACS, press the MENU key, until CONFIGURATION MENU
appears in the display.
2. On the keypad, press the ▲ arrow key once. BOILER OP MODE will be displayed in the
first line of the VFD display. The second line of the display will show the currently selected
Boiler Operating Mode. (SEQUENTIAL MODE or PARALLEL MODE). The default setting
is SEQUENTIAL MODE.
3. If the desired Operating Mode is not displayed in the second line of the display, press the
CHANGE key. The VFD display will switch to a reverse video format indicating that a
change is in process.
4. Using the ▲ or ▼ arrow key, toggle the display to the desired setting.
5. Press the
ENTER key to store the change. The reverse video display will revert to the
normal display format indicating that the change has been stored in memory.