Hydrolevel 3100 User Manual
Page 6
6
NO
NO
Is the
Thermostat
(T-TV) Calling
for Heat?
Is There
24 VAC
Between B1
and B2?
NO
Is the
Low Limit Dial
Set to OFF?
YES
NO
YES
Is the
Red LED
On?
The Control is
Sensing
Low Water.
CAUTION – ALWAYS ALLOW A BOILER TO COOL BEFORE ADDING WATER
The burner will not fire until the low water condition is satisfied.
̈ Check that the system is filled with water.
̈ Check that the sensor is inserted correctly into well.
Note: The use of heat-conductive grease may interfere with the
contact between the spring clip and the copper well tube.
̈ Check that the control is tightly clamped to the well.
Is the
Yellow LED
On?
The Control is
Sensing High
Temperature.
If both the red and yellow LEDs are off and
there is a call to fire the burner, there will be
24 VAC on terminals B1 and B2.
̈ If 24 VAC is not present, the control should
be replaced.
HydroStat is supplying 24 VAC to the burner circuit.
̈ Recheck wiring and operation of burner and other limit controls.
The Control
is Operating
Properly.
Replace
Control
The burner will not fire until the boiler water has dropped to the
high limit differential set-point. See HydroStat Settings chart.
̈ Check that the high temperature setting is correct.
Troubleshooting Flow Chart 1 – Burner Will Not Fire
YES
YES
NO
Is the
Green LED
(TEMP ACTIVE)
On?
The Control is
Not Powered.
The Temp Active LED will be on at all times when the control is
powered.
̈ Check for 120 VAC on terminals L1 and L2.
YES
NO
Is the
Red LED on
the Circuit Board
flashing?
The Load on
the Transformer
Exceeds 30 VA.
The burner will not fire until overload condition is corrected.
̈ Recheck wiring – Terminal TV is electrically connected to boiler
ground. If wiring to TV & Z is reversed, there could be a short
across the transformer.
̈ Make sure that the total load, including the burner circuit, vent
damper and Z & TV connections does not exceed 30 VA.
NO
YES
When the low temperature
setting is set to OFF, the
HydroStat will act as a cold
start control. The burner will
not fire unless there is a call
from the thermostat (T-TV).
̈ Set thermostat to call for
heat. Burner should fire.
̈ If the boiler has a tank-
less coil, set the Low
Temperature Limit to
maintain temperature.
YES