HydroStat 3200 Installation Instructions And Operating Manual page 6

Troubleshooting Flow Chart 1 – Burner Will Not Fire
Is the
NO
Green LED
The Control is
(TEMP ACTIVE)
Not Powered.
On?
YES
Is the
The Control is
YES
Red LED
(LOW WATER)
On?
NO
Is the
The Control is
YES
Yellow LED
(HI TEMP)
On?
NO
Is the The Boiler has
YES
Yellow LED
(TARGET)
On?
NO
Is the
NO
Thermostat
(T-T) Calling (I1-I2) Calling for
for Heat?
YES
Is There
YES
24 VAC
Between B1
and B2?
NO
If both the red and yellow LEDs are off and
there is a call to fire the burner, there will be
Replace
24 VAC on terminals B1 and B2.
Control
The Temp Active LED will be on at all times when the control is
powered.
Check for 120 VAC on terminals L1 and L2.
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.
Sensing
Check that the sensor is inserted correctly into well.
Low Water.
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.
The burner will not fire until the boiler water has dropped to the
high limit differential set-point (10° below high limit setting).
Sensing High
Temperature.
Check that the high temperature setting is correct.
When the ECONOMY function is active, the control monitors heating
demand and establishes Target boiler temperatures below the high
Reached the
limit setting to conserve fuel (see "How Thermal Targeting Works"
Target
on page 4). The burner will not fire until the boiler temperature
Temperature.
drops to the Target Temp Differential (see "Differentials" on page 4).
Is the
NO
Domestic Water
Low Limit Dial
Heat?
YES
The Control
HydroStat is supplying 24 VAC to the burner circuit.
is Operating
Recheck wiring and operation of burner and other limit controls.
Properly.
If 24 VAC is not present, the control should
be replaced.
6
When the low temperature
setting is set to OFF, the
HydroStat will act as a cold
start control. The burner
Is the
YES
will not fire unless there is
a call from the thermostat
Set to OFF?
(T-T) or the indirect water
heater (I1-I2).
NO
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.