Benchmark 2.0 LN Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
Page 60 of 168 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0046_0J
06/18/2015 Phone: 800-526-0288 GF-123
4.5.1 Digital Alarm Switch Checks and Adjustments
The digital alarm switch settings can be checked or adjusted using the controls and display on the
front panel of the switch illustrated in Figure 4-7 and described and Table 4-7.
F
Alarm
RST
SET
Limit Control
Figure 4-7: Digital Alarm Switch Front Panel
Table 4-7: Digital Alarm Switch Controls and Display
CONTROL or
Display
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.
Perform the following steps to check or adjust the 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.
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