Manual

CHAPTER 4
INITIAL START-UP
Page 58 of 166 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 PR1:10/18/12
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
GF-120
OMM-0041 0E
The digital alarm switch settings can be checked or adjusted using the controls and display on
the front panel of the switch illustrated and described in Figure 4-7 and Table 4-7..
F
Alarm
RST
SET
Limit Control
Figure 4-7: Digital Alarm Switch Front Panel
Table 4-6: 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.