Watts AERCO Benchmark BMK750 Operation And Service Manual page 70

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 4 – INITIAL START-UP
Over-Temp Alarm Switch Check and Adjustment Instructions
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 on the Over-Temperature Alarm
switch for 8 seconds. 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° (-5.5°C to + 5.5°C) 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.
OMM-0145_A99 • GF-218 • Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
9/18/2019 Page 70 of 157