AERCO Electronic Controls System (ECS) - Manual (Page 30)

Electronic Control System (ECS) and Type CXT-E Valve
3. ADJUSTMENT
Page 30 of 82
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 VD2: 02/28/14
OMM-0003_0D AC-105
4) If the display does not show the desired over-
temperature alarm setting, press the ▲ or ▼
arrow button to change the display to the desired temperature setting.
5) Once the desired over-temperature alarm setting is displayed, press the SET button to store
the setting in memory.
6)
To exit the programming mode, press the SET and ▼ buttons simultaneously, or simply wait
one minute.
7) Once the programming mode has been exited, the display will show the current outlet water
temperature of the Heater.
Figure 3-4. Over-Temperature Switch
Table 3-2. Over-Temperature Switch Controls and Indicators
CONTROL or
INDICATOR
MEANING FUNCTION
LED Display TEMP status
Displays current water temperature or setpoint.
RST RESET Button
Resets the unit after an alarm condition.
UP Button
Increases the displayed temperature.
DOWN Button
Decreases the displayed temperature.
SET SET Button
Used to access and store parameters in the unit.
3.3.3 Over-Temperature Switch Sensor Adjustment
The Over-Temperature Switch can be adjusted to allow a ±10°F offset, in order to match the
value from a Eurotherm Temperature Controller. To use this function, complete the following
steps:
1) Press and hold the SET button for 8 to 12 seconds. The display will show 00. DO NOT
change these values.
2) Momentarily press the SET button. The SP parameter will be displayed.
3) Using the Up and Down arrow keys, scroll to parameter P1.
4) Press the SET button. The display will show the current offset (default = 0).
5) Press the Up and Down arrows to enter the desired offset value (-10 to +10°).
6) Press the SET button to store the selected offset value.
7) Press the SET and Down arrow buttons at the same time to quit the programming mode, or
wait one minute and the display will automatically exit the programming mode.