Hydrolevel 3250 User Manual

Page 8

ᕡ

TEMP ACTIVE

Indicates that the Fuel Smart

HydroStat control is powered and that the temperature

function is active.

ᕢ

TEMP HI TEMP

Illuminates when the boiler water

temperature reaches the high limit setting. It will remain lit

until the water temperature falls 10°. The Fuel Smart

HydroStat prevents burner operation while this LED is on.

See Differential explanation on page 7.

ᕣ

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.

ᕤ

LWCO LOW WATER

Illuminates if the boiler is in a

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.

ᕥ

ECONOMY ACTIVE

Indicates that the Thermal

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 7 for more information).

ᕦ

ECONOMY TARGET

When the Economy feature is

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

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 below the

differential set point at which point the boiler will be allowed

to fire again. See Differential explanation on page 7.

NOTE: This LED illuminates regularly during normal boiler

operation.

ᕧ

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

000

CURRENT TARGET TEMPERATURE

PRE-PURGE SETTING

000

The display will return to boiler temperature (default) if

Test/Settings Button in not pressed for 5 seconds.

LED LEGEND and TEST/SETTINGS BUTTON