AERCO Control System (ACS) - Manual (Page 72)

MC2: 04/23/13 Page 72 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
4.3.2 Entering Header High Limit and Low Limit Temperatures
The Header High Limit and Header Low Limit are also selected using options in the Field Adjust
Menu as shown below:
NOTE
If the Remote Signal is set to 4 – 20 mA, the HDR HIGH LIMIT
temperature defines the 20 mA value and the HDR LOW LIMIT
temperature defines the 4 mA value.
Entering Header High Limit and Low Limit Temperatures
1. Using the ▲ or ▼ arrow key on the keypad, scroll through the menu until HDR HIGH
LIMIT is displayed in the first line of the VFD display. The second line of the display will
show the currently selected Header High Limit temperature (default = 200°F).
2. If the required HDR HIGH LIMIT 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.
3. Using the ▲ or ▼ arrow key, select required HDR HIGH LIMIT temperature.
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 until HDR LOW LIMIT is displayed in the
first line of the VFD display. The second line of the display will show the currently
selected Header Low Limit temperature (default = 040°F).
6. If the required HDR LOW LIMIT is not displayed, press the CHANGE key.
7. Using the ▲ or ▼ arrow key, select required HDR LOW LIMIT temperature. Press the
ENTER key to store the change.
8. With the ACS still in the FIELD ADJUST MENU, proceed to the next paragraph and
continue the set-up procedure.