Page 33
11
OPTIONAL FEATURES continued
NOTE: If the HydroStat is factory-equipped on a boiler, some options may be set differently from the default settings.
SEE PAGE 4 FOR ADDITIONAL SETTINGS
Dial
Setting
Feature
Options
Description
Default
Setting
2
Fahrenheit or Celsius
F
c
Degrees Fahrenheit
Degrees Celsius
F
3
LWCO Manual or
Automatic Reset
A
b
A
A
Automatic Reset
Manual Reset
A
4
Not available
on this control
6
Not available
on this control
7
8
Low Water Cut-Off
Function
Low Water Cut-Off ON
9
High Limit
Differential
10
20
30
10° Differential
20° Differential
30° Differential
dEF
Restore Factory
Defaults
Y
n
Restore Defaults
Do Not Restore Defaults
n
30
A
11
OPTIONAL FEATURES continued
NOTE: If the HydroStat is factory-equipped on a boiler, some options may be set differently from the default settings.
SEE PAGE 4 FOR ADDITIONAL SETTINGS
Dial
Setting
Feature
Options
Description
Default
Setting
2
Fahrenheit or Celsius
F
c
Degrees Fahrenheit
Degrees Celsius
F
3
LWCO Manual or
Automatic Reset
A
b
A
A
Automatic Reset
Manual Reset
A
4
Not available
on this control
6
Not available
on this control
7
8
Low Water Cut-Off
Function
Low Water Cut-Off ON
9
High Limit
Differential
10
20
30
10° Differential
20° Differential
30° Differential
dEF
Restore Factory
Defaults
Y
n
Restore Defaults
Do Not Restore Defaults
n
30
A
Table 8. Dial Settings for Advanced Programs
When in the Automatic Reset Mode, the boiler
will restart when the low water condition ends.
The manual reset feature meets CSD-1
requirements.
If in the Manual Mode, the control can only be reset
by pushing the Mode button. To activate Manual
Reset LWCO mode.
1. Turn the Advanced Programing dial to access
the Program Mode – indicated in the display as
Pro.
2. Turn the HI LIMIT dial to select feature 3.
3. Push the Mode button to A for Automatic Reset.
See Table 8. Mode or b (lower case b) for
Manual Reset Mode.
4. When finished, turn the Advance Programing dial
back to OFF or turn the HI LIMIT dial to the next
setting (9) to adjust the next feature (See 8.B.3).
8.B.2.b Testing Low Water Cut OFF
AUTO:
To test LWCO while in Auto Reset mode, press
and hold the Mode button for 10 to 30 seconds and
the LOW WATER LED will illuminate solid red and the
boiler will shut off. When you release the Mode button
the light goes out and the boiler will re-fire. Auto Reset
LWCO is working.
Manual:
To test LWCO while in Manual Reset, press
and hold the Mode button. The LED will illuminate solid
red after 10 to 30 seconds, but continue to hold the
Mode button for 60 seconds and the LWCO will shut
down the boiler and the LOW WATER light will now
flash red. Release and re-press the Mode button again
to reset the LWCO and the boiler will restart.
8.B.3 High Limit Differential
This option allows for selecting a 10, 20 or 30 degree
(Fahrenheit). These optional differential settings are
subtractive from the HIGH LIMIT setting.
When in DHW Mode the high limit differential is
active. When in Economy mode the Thermal targeting
differential is active.
To change the high limit differential.
1. Turn the Advanced Programing dial to access the
Program Mode –indicated in the display as Pro.
2. Turn the HI LIMIT dial to select feature 9.
3. Push the Mode button to select a high limit
differential of 10, 20, or 30 degrees.
4. When finished, turn the Advance Programing dial
back to
OFF.
8.C Sensor Programming
8.C.1
Outdoor Sensors
IMPORTANT NOTE:
The outdoor sensor must be
installed if Outdoor Reset Ratio is preferred over
Thermal Targeting (Economy Mode) or if Warm
Weather Shutdown is desired in either mode. Install
sensor prior to setting the Warm Weather Shutdown
or Reset Ratio. See Section 7.C on page 23
Outdoor Sensors are activated automatically when
the sensor is wired. See Section 7.D.1 on page
24. When connected, Outdoor Reset overrides
the Economy Settings. The display will toggle
between boiler temperature (8 seconds) and outdoor
temperature (2 seconds). If the sensor becomes
damaged or disconnected, the control will automatically
revert back to the Economy Settings. The display
will no longer toggle outdoor temperature.
Before installation, determine the proper location for
the sensor.
• Sensor should be mounted on the northern outside
wall of the house, shielded from direct sunlight.
• Sensor should be installed high enough off the
ground to protect it from accidental damage or
drifting snow.
• Sensor should be installed away from potential heat
sources such as exhaust fans, windows, or doors.
8.C.2
Setting Warm Weather Shutdown
The warm weather shutdown feature prevents the
boiler from providing space heating when the outside
temperature reaches a user-selected temperature.
Available settings range from OFF or 40°-70°F. The
boiler will still operate to satisfy a call for domestic hot
water. The factory default setting for the warm weather
shutdown is 70°F.
Wiring options are described in 7.C on page 23
M
INI-
T
HERM
JX
Residential Boilers
®
