31
111079-01 - 12/20
FR
Installation & Service Manual
Dial
Setting
Feature
Options
Description
Default
Setting
1
Thermal Pre-Pruge
OFF
ON
Purge Inactive
Purge Active
OFF
2
Fahrenheit or
Celsius
F
C
Degrees Fahrenheit
Degree Celcius
F
3
LWCO Manual or
Automatic Reset
A
b
Automatic Reset
Manual Reset
A
4
Circulator Options
A
b
c
Circulator operation on TT call only
Circulator operation on ZC/ZR call
only
Circulator operation on call from either
A
5
Circulator Hold Off
ON
OFF
Circulator Hold Off - Active
Circulator Hold Off - Inactive
ON
6
Not available on this
control
7
Not available on this
control
8
Well Type
A
b
Hydrolevel Electro-Well
Standard Immersion Well
A
9
High Limit
Differential
10
20
30
10o Differential
20o Differential
30o Differential
10
dEF
Restore Factory
Defaults
Y
N
Restore Defaults
Do Not Restore Defaults
n
NOTE: If the HydroStat is factory-equipped on a boiler, some options may be set differently from
the default settings. Not all features are available on older HydroStat models.
8.
Restore Factory Default Settings To restore
all features to the factory default settings
(see
following chart for default settings)
1. Turn the LO TEMP dial to access the
Program Mode - indicated in the display
as Pro
2. Turn the HI TEMP dial to select feature
dEF
3. Push the Test/Setting Button to Y to reset
all features to the default settings
4. Reset LO TEMP and HI TEMP settings to
desired temperatures.
9. LED Legend and Test/Settings Button
a. TEMP ACTIVE Indicates that the Fuel
Smart HydroStat control is powered and
that the temperature function is active.
b. TEMP HI TEMP
Illuminates when
the boiler water temperature reaches
the high limit setting. It will remain lit until
the water temperature falls 10o. The Fuel
Smart HydroStat prevents burner operation
while this LED is on. See Differential
explanation.
c. 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
TM
,
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 Elctro-Well
TM
, this LED will not illuminate
indicating that the control is not providing
low water cut-off functionality.
d. LWCO LOW WATER Indicates that
the boiler is in a low water condition.
The HydroStat control will prevent burner
operation during this condition. If the LOW
WATER light is blinking, the control has been
programmed to provide lockout protection
in the event a low water condition is
detected (see Manual Reset Low Water Cut-
Off). Pressing the TEST/SETTINGS button
will reset the control.
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.
9
Operating
(continued)
!
