6
Circulator Activation Options
When in the default mode, the HydroStat activates the circulator (C1/C2 contacts) on calls to TT. The control can be pro-
grammed to activate the circulator on calls to ZC/ZR in place of, or in addition to, calls to TT.
T
o change how the Circulator is activated
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
4
3
. Push the Test/Settings Button to select between the following options:
A -
Circulator on TT call only
b - Circulator on ZC/ZR call only
C - Circulator on both TT & ZC/ZR calls
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 4)
Setting the Well Type (Electro-Well vs. Standard Immersion Well)
When used to replace older temperature-only controls, the HydroStat can be installed on the existing well. (The Hydrolevel
Electro-Well is required to activate low water cut-off operation – see page 2 for details). Older wells may contain hardened heat
transfer grease or other contaminants that could interfere with metal-to-metal continuity between the sensor head and the inside
of the well. Insufficient contact could lead to false low water conditions and burner shut downs. Setting the well type to Standard
Well prevents the possibility of this occurring.
To change the well type
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 8
3. Push the Test/Settings Button to select A for Electro-Well or b for Standard Well.
NOTE: To ensure that the low water cut-off is always active when the control is installed on an Electro-Well, setting b will ONLY be available
when installed on a standard well. The Hydrostat sensor checks to determine if a standard well is used by looking for low resistance to ground,
a condition that can only exist with a standard well. If you are installing on a standard well and either Low Water LED’s are on, setting b will not
be available. Check to see if the inside of the well tube is badly oxidized or contaminated with heat transfer grease. It may be necessary to
clean the well to allow for setting b to be selected (See Troubleshooting Guide on page 12 for more information).
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/Settings Button to Y to reset all features to the default settings.
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 4)
SEE PAGE 4
FOR ADDITIONAL
SETTINGS
Dial
Setting
Feature
Options
Description
Default
Setting
1
Thermal Pre-Purge
OFF
on
Purge Inactive
Purge Active
OFF
2
Fahrenheit or Celsius
F
c
Degrees Fahrenheit
Degrees Celsius
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
Not available
on this control
6
Not available
on this control
7
Not available
on this control
8
Well Type
A
b
Hydrolevel Electro-Well
Standard Immersion Well
A
dEF
Restore Factory
Defaults
y
n
Restore Defaults
Do Not Restore Defaults
n
Not all features are
available on older
HydroStat models.
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