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Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
CONTROL or
Display
LED Display
RST
SET
Perform the following steps to check or adjust the digital alarm switch settings:
Check or Adjust Digital Alarm Switch Settings
1. Set the ON/OFF to the ON position.
2.
Press the SET button on the Digital Alarm Switch. SP will appear in the display.
3.
Press the SET button again. The current over-temperature limit value stored in memory will be
displayed. (default = 210°F).
4.
If the display does not show the required 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 (210ºF) is displayed, press the SET button to store
the setting in memory.
6.
To calibrate the offset (P1), press and hold the SET button for 8 seconds on the Digital Alarm Switch.
Access code value 0 should appear in the display. The switch comes from the factory with the code
set at 0. AERCO recommends that you do not change this code.
7.
Press the SET button again to enter the code. The first parameter label (SP) will appear in the
display.
8.
Using the ▲ and ▼ arrow keys, select parameter P1.
9.
Press SET to view the value stored in memory.
10.
If the desired value is not displayed, modify the setting using the ▲ and ▼ arrow keys. The value
can be changed from -10° to +10° offset. Press SET to enter the value and exit to the text
parameter.
OMM-0099_0A
GF-145
CHAPTER 4 – INITIAL START-UP
Alarm
Limit Control
Figure 4-8: Digital Alarm Switch Front Panel
Table 4-1: Digital Alarm Switch Controls and Display
MEANING
TEMP status
RESET Button
UP Button
DOWN Button
SET Button
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
F
RST
SET
FUNCTION
Displays current water temperature or setpoint.
Resets the unit after an alarm condition.
Increases the displayed temperature.
Decreases the displayed temperature.
Used to access and store parameters in the unit.
Page 67 of 234
PR1: 05/21/2014
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