AERCO BMK 2.0 LN Dual Fuel Serial G-11-2402 and UP - Manual (Page 55)

CHAPTER 4: INITIAL START-UP
PR2: 04/22/13 Page 55 of 160
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.