User’s Information Manual
3SMART SYSTEM control module (continued)
Status display screens
Status Display Screens
By using the Previous/Next (, ) arrow keys on the SMART SYSTEM display panel, you can navigate through the nine (9) display screens. Each screen will contain two (2) viewable items. The following is a description of the individual items and what they can display:
Screen | Display shows: | Description |
| HTR: OFF | The unit has been turned OFF by the Enter/Reset button on the |
| SMART SYSTEM display panel. | |
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| Standby | The unit has not received a call for heat from a remote thermostat nor |
| has it received a call for heat from a DHW thermostat. | |
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| Set Point Met | The unit has met the water temperature set point, but is still receiving |
| a call for heat from either a remote thermostat or a DHW thermostat. | |
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| Prepurge | The unit has initiated the 10 second purge and 15 second HSI warm- |
| up periods on a call for heat. | |
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| Ignition | The unit has begun a 5 second trial for ignition. |
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| SH***% Rate | The unit has fired and is running at the displayed percentage. |
| DHW***% Rate | |
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#1 |
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| The call for heat has been satisfied and the unit runs the fan for an | |
| Postpurge | additional 10 seconds to clear the combustion chamber and vent |
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| system of residual flue products. |
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| Service | The unit has been placed in a temporary mode that will allow the unit |
| to fire for the purpose of combustion analysis. | |
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| When the outlet sensor has been selected as the control sensor |
| OUT: ***F(***) | (default), the control will display the outlet temperature as well as the |
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| set point in parenthesis. |
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| If the outlet sensor has not been selected as the control sensor or a |
| ***F | system supply sensor is connected, only the outlet temperature will be |
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| displayed. |
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| Open | The control does not detect the outlet sensor. |
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| Shorted | The outlet sensor wires or the sensor itself has become shorted. |
Press the Next arrow key on the SMART SYSTEM display to access Screen #2.
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| If the inlet sensor has not been selected as the control sensor or a |
| IN: ***F | system return sensor is installed, only the inlet temperature will be |
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| displayed. |
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| When the inlet sensor has been selected as the control sensor, the |
| ***F (***) | control will display the inlet temperature as well as the set point in |
#2 |
| parenthesis. |
| Open | The control does not detect the inlet sensor. |
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| Shorted | The inlet sensor wires or the sensor itself has become shorted. |
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| RISE: ***F | The difference between the inlet temperature and the outlet |
| temperature. | |
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Press the Next arrow key on the SMART SYSTEM display to access Screen #3.
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