User’s Information Manual
4SMART SYSTEM control module (continued)
Status Display Screens
By using the Previous/Next (, ) arrow keys on the SMART SYSTEM display panel, you can navigate through the eight (8) display screens. Each screen will contain two (2) viewable items. The following is a description of the individual items and what they can display:
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| Display shows: | Description |
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| BLR: OFF | The unit has been turned OFF by the Enter/Reset button on the |
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| SMART SYSTEM display panel. | |
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| Standby | The unit has not received a call for heat from a remote thermostat |
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| nor has it received a call for heat from a DHW thermostat. | |
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| The unit has met the water temperature set point, but is still |
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| Set Point Met | receiving a call for heat from either a remote thermostat or a DHW |
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| thermostat. |
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| Prepurge | The unit has initiated a 10 second purge period on a call for heat. |
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| Ignition | The unit has begun a 5 second spark period to ignite the main |
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| burner. | |
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| SH***% Rate | The unit has fired and is running at the displayed percentage. |
#1 |
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| The call for heat has been satisfied and the unit runs the fan for an | |
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| 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 |
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| unit to fire at 100% of rate for the purpose of combustion analysis. | |
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| When the outlet sensor has been selected as the control sensor |
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| OUT: ***.*F(***) | (default), the control will display the outlet temperature as well as |
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| the set point in parenthesis. |
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| ***.*F | If the outlet sensor has not been selected as the control sensor, only |
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| the outlet temperature will be 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. |
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| Press | the Next arrow key on the | SMART SYSTEM display to access Screen #2. |
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| IN: ***.*F | If the inlet sensor has not been selected as the control sensor, only |
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| the inlet temperature will be displayed. | |
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| When the inlet sensor has been selected as the control sensor, the |
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| ***.*F (***) | control will display the inlet temperature as well as the set point in |
#2 |
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| parenthesis. |
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| 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 |
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| temperature. | |
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| Press | the Next arrow key on the | SMART SYSTEM display to access Screen #3. |
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15 
