Install Instructions

7
I N S TA L L ATION COMPLETE
a. Before filling the system, turn on the electric power to
the boiler. The low water cut-off's green "Power On" LED
should be illuminated. With the room thermostat set on
"heat", confirm that the burner will not operate without
water in the system. The low water cut-off's red LED
should be illuminated.
NOTE: The burner will come on briefly (1 second or less)
and then shut off to verify proper operation.
b. Fill the system with water. When water is just above the
probe, the low water cut-off's red LED should turn off.
c. Check and confirm that the boiler’s thermostat, burner and
safety limits are operating properly after filling system and
before leaving the site.
d. Check the threaded connection of the RB-24 low water
cut-off for leakage. Tighten, if necessary.
STEP 5 - Testing
Testing Control Using “Test Button”
Pressing the “Test Button” interrupts the probe circuit which simulates water off the probe.
a. Press and hold “test button” while burner is running.
b. The burner should turn OFF and red light turn ON if burner is wired correctly.
c. Release the test button and the red light should turn off and the boiler should turn on
provided that the boiler water in contact with the probe.