Troubleshooting - HydroStat 3200 Installation Instructions And Operating Manual

LED LEGEND and TEST/SETTINGS BUTTON
TEMP ACTIVE
Indicates that the
Fuel Smart HydroStat control is
powered and that the temperature
function is active.
TEMP HIGH TEMP
when the boiler water temperature
reaches the high limit setting. It will
remain lit until the water temperature
falls 10° (see High Limit Differential on page 4). The Fuel
Smart HydroStat prevents burner operation while this
LED is on.
LWCO ACTIVE
Indicates that the low water cut-off
(LWCO) function of the Fuel Smart HydroStat 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.
IMPORTANT: If the control is installed with a well other than
the Electro-Well, this LED will not illuminate indicating that
the control is not providing low water cut-off functionality.
LWCO LOW WATER
low water condition. The Fuel Smart HydroStat will prevent
burner operation during this condition. IMPORTANT: The
system must be checked by a qualified heating professional
prior to resuming operation.
WARNING: DO NOT ADD WATER UNTIL THE BOILER
HAS FULLY COOLED.
ECONOMY ACTIVE
Targeting function is active and the Fuel Smart HydroStat will
reduce boiler temperature to conserve fuel. The Economy
feature is activated using the ECONOMY dial. (See "How
Thermal Targeting Works" on page 4 for more information).
ECONOMY TARGET
active, the Fuel Smart HydroStat continually sets target
temperatures below the high limit setting to maximize fuel
efficiency. When the boiler water reaches the target

TROUBLESHOOTING

Burner Will Not Fire
Burner Will Not Shut Down
Temperature Display Exceeds
High Limit Setting
No or Insufficient
Domestic Hot Water
Boiler Will Not Maintain
Low Limit Temperature
House Will Not Get
or Stay Warm
Illuminates
Illuminates if the boiler is in a
Indicates that the Thermal
When the Economy feature is
See Flow Chart 1, page 6
See Flow Chart 2, page 7
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.
For boilers 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 and will function as a cold start control. If
installed with an indirect water heater, insure that the end switch in the relay box
controlling the indirect water heater is connected to the I1-I2 terminals. This will insure
that the domestic water calls are prioritized. (see "Heating-With Indirect Water Heater" on
page 3).
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.
1. Check for air-bound radiators. 2. Check thermostat settings including heat anticipator
settings (common on non-digital thermostats). 3. Check the Economy setting. The
Economy feature, much like outdoor reset controls, lowers average boiler temperature
and can slow or, in some cases, prevent the house from coming up to temperature.
Move to a lower setting (see "Setting the Economy Feature" on page 4).
will be allowed to fire again. NOTE: This LED illuminates
regularly during normal boiler operation.
TEST/SETTINGS Button
To Test Low Water Cut-Off: Press and hold the Test/
Settings button for 5 seconds. The display will read LCO.
LWCO TEST
The red Low Water light should illuminate and the burner
circuit (B1 and B2) should de-energize. NOTE: The control
must be installed with a Hydrolevel Electro-Well for low water
cut-off functionality (see page 2 for more details).
To View Current Settings: Press and release the
Test/Settings Button in short intervals to sequentially display
the following settings:
HIGH LIMIT SETTING
LOW LIMIT SETTING
ECONOMY SETTING
CURRENT TARGET TEMPERATURE
PRE-PURGE SETTING
The display will return to boiler temperature (default) if
Test/Settings Button in not pressed for 5 seconds.
5
temperature, the LED illuminates and
the burner will shut down. The boiler
water will continue to circulate and
heat the house as long as the
thermostat call continues. The
LED will stay lit until the boiler
temperature drops to the differential
set point (see Target Temp Differential
on page 4) at which point the boiler
00
00
00
000
000