Instruction Manual

Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0082_0J AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 67 of 192
GF-130 Ph.: 800-526-0288 05/21/2014
Table 4-1: Digital Over-Temperature Limit Controller Features
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 steps in the following procedure to check or adjust the digital alarm switch settings:
Switch Check or Adjustment
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.