CHAPTER 4: INITIAL START-UP
PR2: 04/22/13 Page
55
of
158
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
Table 4-13: 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.
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.
11.
To exit the programming mode, press the
SET
and ▼ buttons simultaneously, or simply wait one
minute and the display will automatically exit the programming mode.
12.
Once the programming mode has been exited, the display will show the current outlet water
temperature of the boiler.
