Digital Alarm Switch Checks And Adjustments - Watts Aerco BENCHMARK 750 User Manual

Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL

4.5.1 Digital Alarm Switch Checks and Adjustments

The Over-Temperature 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 4-6 and Table 4-8.
Figure 4-6: Digital Over-Temperature Alarm Switch Front Panel
Table 4-8: Over-Temperature Alarm Switch Controls and Display
CONTROL OR
DISPLAY
LED Display
RST
SET
Perform the following steps to check or adjust the Over-Temperature Alarm switch settings:
1. Set the ON/OFF switch to the ON position.
2. Press the SET button on the Over-Temperature 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, 98.9
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 Over-
Temperature 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.
display.
8. Using the ▲ and ▼ arrow keys, select parameter P1.
OMM-0119_0A
GF-130-I
CHAPTER 4 – INITIAL START-UP
MEANING
TEMP status Displays current water temperature or setpoint.
RESET Button Resets the unit after an alarm condition.
UP Button Increases the displayed temperature.
DOWN Button Decreases the displayed temperature.
SET Button Used to access and store parameters in the unit.
Switch Check or Adjustment
).
°C
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
FUNCTION
The first parameter label, SP, will appear in the
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11/03/2016