Owner manual

Benchmark 1500DF - 2000DF Boilers
CHAPTER 4 – INITIAL START-UP
Page 66 of 196 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0098_0A
04/01/2014 Ph.: 800-526-0288 GF-144
Figure 4-5: Over-Temperature Limit Switch Locations
4.7.1 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 4-6 and Table 4-1.
F
Alarm
RST
SET
Limit Control
Figure 4-6: Digital Over-Temperature Alarm Switch Front Panel
Table 4-1: 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.
DIGITAL OVER-TEMPERATURE
ALARM SWITCH
ADJUSTABLE TEMPERATURE
LIMIT SWITCH
RESET BUTTON FOR MANUAL
TEMPERATURE LIMIT SWITCH
MANUAL TEMPERATURE LIMIT
SWITCH
FUEL SELECTOR SWITCH