Crown Boiler TWZ Series, Installation Instructions Manual

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5) Circulator Hold Off (Enhanced Condensing Protection) - To reduce the potential for condensing, on a call for heat the control
will allow the boiler to heat to 125°F prior to energizing the circulator. Once energized, the circulator will remain on for the
duration of the heating call unless the boiler temperature drops below 115°F. If this occurs, the circulator will re-energize
when the boiler returns to 125°F. Circulator Hold Off will expire after 15 minutes.
To activate Circulator Hold Off
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
5
3. Push the Test/Settings Button to turn Circulator Hold Off
on
or
OFF
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 28)
6) Not available on this control.
7) Not available on this control.
8) Well Type - Hydrolevel Electro-Well (factory installed on boiler).
9) High Limit Differential - When the Economy feature is on, the control’s Thermal Targeting feature actively sets varying
differentials based on system conditions. This option allows for selecting a 10, 20 or 30 degree fixed differential when the
Economy feature is turned OFF. These optional differential settings are subtractive from the HIGH LIMIT setting. Note: If
the Economy feature is on, this setting will be overridden by the control’s Thermal Targeting function.
To change the High Limit Differential
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
9
3. Push the Test/Settings Button to select a high limit differential of
10
,
20
, or
30
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 28)
dEF
) Restore Factory Default Settings
To restore all features to the factory default settings (see Table 12.2 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 28)