6
Operating Instructions
NOTE:
For proper low water cut-off operation, the boiler should be
cleaned at initial installation and periodically thereafter. Refer to the
boiler manufacturer’s instructions for cleaning procedures.
OPERATING TEST PROCEDURE
1. After installation, bring the boiler water to a safe operating level,
turn on power and set the thermostat to call for heat. The amber
LED lamp should be off.
The boiler will fire immediately.
2.
Slowly
lower the boiler water to a point below the probe. The
amber LED lamp on the control will light. The lamp may begin to
flicker with the bouncing water level. Stop draining the boiler
when the lamp glows steadily.
NOTE:
The water should not be lowered beyond a visible point in
the gauge glass.
3. The boiler will shut down within 15 seconds.
IF BURNER DOES NOT SHUT DOWN IN LOW WATER
1. Check to see if a foaming condition in the boiler is preventing the
control from accurately detecting the water level. With power to
the system on, and water above the probe level, set the thermo-
stat so there is no call for heat and allow the burner to shut
down. Then, slowly lower the water in the boiler to a point below
the probe. The amber LED lamp should turn on and the relay will
open after a 15 second delay. Once this has occurred, reestablish
a call for heat and the boiler should not fire. Now raise the water
level to an operating level. The amber light should turn off and
the control should reenergize the burner circuit after a 30 second
delay. If the control functions normally during this test, but allows
water to drop below the level of the probe when the test is con-
ducted with the burner on (as described in the Operating Test
Procedure above), the boiler is foaming. The CycleGard provides
protection for foaming boilers (see CycleGard Intermittent Level
Test Feature on page 5). However, to provide optimal steaming
performance, it is still recommended that you clean the boiler in
accordance with the manufacturer's instructions. The foaming
condition is caused by machining oils, elevated mineral content
from make-up water, grease and other contaminants in the boiler
water. Cleaning the boiler will eliminate foaming conditions in the
boiler and provide for optimal steaming performance.
2. Check terminal block wiring to insure that all connections are
correct.
3. Check the probe installation to insure that there is 1/4" clearance
from any surface within the boiler or pipe. (Refer to Step 3 on
page 1 of this instruction sheet.
IF THE AMBER LED LAMP IS ON
The amber LED lamp indicates that the water is below the probe. If
the gauge glass shows that the water is at the correct operating
level and the amber LED is lit check the following:
1. Check for plugged gauge glass.
2. Make sure probe lead wire is properly secured to the terminal.
3. Check for proper ground between probe and boiler shell.
Excessive use of Teflon tape or sealing compound may isolate the
probe from the boiler shell.
4. Remove probe and examine for oily residue. Clean probe with
steel wool and skim boiler.
IF THE GREEN LED LIGHT IS ON
The green LED lamp indicates that the control is conducting an
Intermittent Level Test. The burner does not fire during the test peri-
od. See Intermittent Level Test Feature on page 5 for more details.
Maintenance
To insure optimum performance, remove and inspect the probe
annually.
Clean any sediment or scale from the probe using a scouring pad or
steel wool.
NOTE: Do not use caustic chemicals that could damage the
probe.
Reinstall the probe and perform the Operating Test Procedure
described above.
