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The time range of this parameter is 10 minutes to 240 minutes. The default value is 30 minutes. F: Outdoor air reset Outdoor air shutdown When the outdoor air shutdown rises above this point, the control will block all SH demands (DHW demands will still be active). This parameter can be changed by the user or the installer by accessing parameter F5. The temperature range of this parameter is 0°F to 120°F. The default value is 80°F. Outdoor air shutdown differential The outdoor air shutdown differential parameter is the number of degrees below parameter F5 the outdoor air temperature must go before the boiler will respond to a SH demand. This parameter can be changed by the user or the installer by accessing parameter F6. The temperature range of this parameter is 0°F to 90°F. The default value is 10°F. Boost temperature If a SH demand lasts longer than the programmed time delay setting and there have been no DHW demands, the control will increase the water temperature set point by the amount in this parameter. If the SH demand continues through another time period, the set point will be increased again. This will continue until either the SH demand ends, a maximum of 20 increases has occurred, or the maximum set point has been reached. Once the SH demand has been satisfied the set point will revert back to its calculated setting. The boost temperature can be changed by the installer by accessing parameter F8. The temperature range of this parameter is 0°F to 45°F. The default value is 0°F. This feature will be active if this parameter is set to anything other than 0°F. Boost time The boost time parameter sets the amount of time that must elapse with a SH demand before the water temperature set point will be increased. This parameter can be changed by the installer by accessing parameter F9. The time range for this parameter is 1 minute to 60 minutes. The default value is 20 minutes. 14 User’s Information Manual 4 SMART 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: Screen Display shows: Description #1 BLR: OFF The unit has been turned OFF by the Enter/Reset button on the SMART SYSTEM display panel. 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. 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. Prepurge The unit has initiated a 10 second purge period on a call for heat. Ignition The unit has begun a 5 second spark period to ignite the main burner. Run***% Rate The unit has fired and is running at the displayed percentage. Postpurge The call for heat has been satisfied and the unit runs the fan for an additional 10 seconds to clear the combustion chamber and vent system of residual flue products. Service The unit has been placed in a temporary mode that will allow the unit to fire at 100% of rate for the purpose of combustion analysis. OUT: ***.*F(***) When the outlet sensor has been selected as the control sensor (default), the control will display the outlet temperature as well as the set point in parenthesis. ***.*F If the outlet sensor has not been selected as the control sensor, only the outlet temperature will be displayed. Open The control does not detect the outlet sensor. 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. #2 IN: ***.*F If the inlet sensor has not been selected as the control sensor, only the inlet temperature will be displayed. ***.*F (***) When the inlet sensor has been selected as the control sensor, the control will display the inlet temperature as well as the set point in parenthesis. Open The control does not detect the inlet sensor. Shorted The inlet sensor wires or the sensor itself has become shorted. RISE: ***.*F The difference between the inlet temperature and the outlet temperature. Press the Next • arrow key on the SMART SYSTEM display to access Screen #3. 15 User’s Information Manual 4 SMART SYSTEM control module Status Display Screens (cont’d) 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: Screen Display shows: Description #3 SYS: ***.*F If the system supply sensor has not been selected as the control sensor, only the system temperature will be displayed. ***.*F (***) When the system supply sensor has been selected as the control sensor, the control will display the system temperature as well as the s...