46
EMP
Installation & Service Manual
109529-03 - 11/19
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 De-
faults
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.
d. Reset LO TEMP and HI TEMP settings to
desired temperatures.
8.
Restore Factory Default Settings
To restore all features to the factory
default settings
(see following chart for
default settings)
a. Turn the LO TEMP dial to access
the Program Mode - indicated in the
display as Pro
b. Turn the HI TEMP dial to select feature
dEF
c. Push the Test/Setting Button to Y
to reset all features to the default
settings
d. 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 no 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.
9
Operating
(continued)
