AERCO BMK 3.0 LN Dual Fuel July 2011 - Manual (Page 42)

INITIAL START-UP
4-10
Figure 4-7
Over Temperature Limit Switch
Locations
4.6.1 Digital Alarm Switch Checks and
Adjustments
The digital 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 4-8 and Table 4-2
F Alarm
RST
SET
Limit Control
Figure 4-8
Digital Alarm Switch Front Panel
Table 4-2:
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.
RESET BUTTON FOR
MANUAL RESET
TEMPERATURE
LIMIT SWITCH
ADJUSTABLE
TEMPERATURE
LIMIT SWITCH
DIGITAL OVER-
TEMPERATURE
ALARM SWITCH
FUEL
SELECTOR
SWITCH