Hydrolevel 3100 - Manual (Page 5)

5
TROUBLESHOOTING
Burner Will Not Fire See Flow Chart 1, page 6
Burner Will Not Shut Down See Flow Chart 2, page 7
Temperature Display Exceeds
High Limit Setting
Under normal operation, boiler temperature will continue to rise after the control shuts off
the burner. This condition, known as “thermal stacking”, results from hot boiler surfaces
continuing to release heat into the boiler water.
Red Light on Circuit Board
is Flashing
The red light to the left of the temperature display will flash if the transformer has been
overloaded. (See top portion of troubleshooting flow chart on page 6.)
No Domestic Hot Water
If the boiler is equipped with a tankless coil, make sure the low limit setting on the
HydroStat is set properly. NOTE: If the low limit setting is dialed fully counter clockwise, it
will shut off the low temperature maintenance feature.
Boiler Will Not Maintain
Low Limit Temperature
Check for overlapping high temperature setting. If the high limit setting is set below the
low limit setting, the control will default to the high limit setting and the corresponding
high limit differential setting.
Temperature Display
Differs from Boiler
T&P Gauge Temperature
Reading
Temperature variances can result from differing water temperatures within the boiler or
different reaction times of the two devices. If the HydroStat temperature is significantly
below the T&P gauge temperature, make sure the thermistor is inserted all the way to
the end of the well. If installed in an existing conventional well, check that hardened heat
conducting grease has not impeded the insertion of the thermistor. Clean or replace the
well to ensure proper insertion of the sensor.
LWCO “Active” Light
(Green LED) Is Not On
When Installed on Standard Immersion Well: This is a normal condition. The control
will provide temperature functionality only. The HydroStat must be installed on a
Hydrolevel Electro-Well for low water cut-off functionality.
When Installed on a Hydrolevel Electro-Well: The control is detecting unusually high
conductivity. Check for minimum ½" clearance between the copper well tube and any
surface within the boiler.
Low Water Light
(Red LED) Is On
WARNING: A low water condition is a serious and potentially dangerous condition. Do
not attempt to add water to a hot boiler. Allow the boiler to fully cool before adding water.
1. If the heating system is filled with water, pull the sensor out of the well and inspect it.
Make sure that the metal clip on the sensor is intact. This metal clip must be in contact
with the inside of the copper well in order for the control to sense the presence of
water. Check that the well does not have excessive build-up of heat transfer grease
that may interfere with clip contacting the well.
2. Remove well and examine for excessive residue build-up. Clean and re-install.
LED LEGEND
ᕡ TEMP ACTIVE Indicates that
the HydroStat control is powered and
that the temperature function is active.
ᕢ TEMP HIGH TEMP Illuminates
when the boiler water temperature
reaches the high limit setting. It will
remain lit until the water temperature
falls below the high limit setting less
the differential setting. The HydroStat
control will prevent burner operation
while this LED is on.
NOTE: This LED illuminates regularly
during normal boiler operation.
ᕣ LWCO ACTIVE Indicates that
the low water cut-off (LWCO) function
of the HydroStat control is active.
When the control is installed with a
Hydrolevel Electro-Well, this LED will
be on at all times when the control is
powered.
NOTE: If the control was installed with
a well other than the Electro-Well, this
LED will not illuminate. This indicates
that the control is providing
temperature function only.
ᕤ LWCO LOW WATER Indicates
that the boiler is in a low water
condition. The HydroStat control will
prevent burner operation during this
condition.
IMPORTANT:
The system must be checked by a
qualified heating professional prior to
resuming operation.
WARNING: ALLOW THE BOILER TO
FULLY COOL BEFORE ADDING
WATER.