AERCO Control System (ACS) - Manual (Page 70)

MC2: 04/23/13 Page 70 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
4.2.5 Entering System Start Temperature
In order to set up the Outdoor Reset Mode, the System Start Temperature must be entered. The
System Start Temperature is the outside air temperature at which the boiler plant begins to
operate. The factory default value for the System Start Temperature (SYS START TEMP) is
70°F. However, temperatures from 32°F to 120°F can be selected using the ▲ and ▼ arrow
keys on the ACS keypad. Proceed as shown below:
4.2.6 Entering Boiler Start and Boiler Stop Levels
The Boiler (BLR) Start and Boiler Stop Levels are also entered in the Configuration Menu. Refer
to Appendix I to determine the correct Start and Stop levels for your installation. Enter the
appropriate values in the Configuration Menu as shown below:
Entering Boiler Start & Boiler Stop Levels
1. Press the MENU key until RELAY MENU appears in the display.
2. Press the ▲ arrow key once. SYS START TEMP will be displayed along with the current
setting for the System Start Temperature.
3. Press the CHANGE key to change the displayed temperature. The display will switch to a
reverse video format.
4. Select the desired System Start temperature using the ▲ or ▼ arrow key.
5. Press the
ENTER key to store the changed temperature. The reverse video display will
revert to the normal VFD display format.
Entering System Start Temperature
1. Using the ▲ or ▼ arrow key on the keypad, scroll through the Configuration Menu until
BLR START LEVEL is displayed along with the current setting (default = 20%).
2. If the desired Boiler Start Level is not displayed, press the CHANGE key. The display will
switch to to a reverse video format.
3. Select the desired Boiler Start Level using the ▲ or ▼ arrow key.
4. Press the
ENTER key to store the changed Start Level.. The reverse video display will
revert to the normal VFD display format.
5. Next, scroll through the menu until the BLR STOP LEVEL is displayed along with the
current setting (default = 16%).
6. If the desired Boiler Stop Level is not displayed, repeat steps 2, 3 and 4 above and enter
the desired Stop Level.