Owner's manual

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.
To change how the Circulator is activated
1. Turn the LO TEMP dial to access the Program Mode – indicated in the display as
2. Turn the HI TEMP dial to select feature
3. Push the Test/Settings Button to select between the following options:
- Circulator on TT call only
- Circulator on ZC/ZR call only
- Circulator on both TT & ZC/ZR calls
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 4)
Low Water Cut-Off Function
To turn off Low Water Cut-Off
1. Turn the LO TEMP dial to access the Program Mode – indicated in the display as
2. Turn the HI TEMP dial to select feature
3. Push the Test/Settings Button to turn Low Water Cut-Off or
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 4)
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
2. Turn the HI TEMP dial to select feature
3. Push the Test/Settings Button to 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
Thermal Pre-Purge Purge Inactive
Purge Active
Fahrenheit or Celsius Degrees Fahrenheit
Degrees Celsius
LWCO Manual or
Automatic Reset
Automatic Reset
Manual Reset
Circulator Options Circulator operation on TT call only
Circulator operation on ZC/ZR call only
Circulator operation on call from either
Not available
on this control
Not available
on this control
Not available
on this control
Low Water Cut-Off
Function
Low Water Cut-Off ON
Low Water Cut-Off OFF
Restore Factory
Defaults
Restore Defaults
Do Not Restore Defaults
HydroStat 3150 Instructions Page 6