Trane MUA-SVP01A-EN, Direct-Fired Indoor and Outdoor Make-Up Air Units manual Ventilation Mode

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Unit Operating Modes

with internal heat gain. In certain conditions it may be necessary to readjust the minimum discharge air or room temperature setpoint upward or adjust the outside/return air ratio to provide a warmer supply air temperature.

Energy Savings Mode 1—Non-Recirculating Units. Energy Savings Mode 1 will automatically disable the burner if the outside air temperature is equal to or greater than the minimum discharge air temperature setpoint, and the room air temperature is 5°F above the room air temperature setpoint. This function is intended to restrain the room temperature from rising uncontrollably in buildings with internal heat gain. In certain conditions it may be necessary to readjust the minimum discharge air or room temperature setpoint upward or adjust the outside/return air ratio to provide a warmer supply air temperature.

Energy Savings Mode 2—Mixing Box Recirculating Direct-Fired Units. Energy

Savings Mode 2 will automatically disable the burner if the burner's minimum firing rate exceeds the allowable equivalent temperature rise. This condition is unlikely to occur unless the burner's minimum firing rate is misadjusted and set too high, or the inlet air opening is restricted.

Energy Savings Mode 3. Energy Savings Mode 3 will automatically disable the burner if the outside air temperature is above the Outside Air Economizer setpoint. This function is similar to an inlet duct thermostat. The burner will cycle back on if the supply air temperature drops 3°F below the Outside Air Economizer setpoint.

To change the desired outside air economizer temperature scroll through the SETPOINTS menu tree, locate the ECONOMIZER Setpoint, and enter a new temperature. The default for this setpoint is 65°F. The allowable temperature range is 40°F - 80°F.

Ventilation Mode

Ventilation Mode occurs when the fan is running but the unit is not providing heating or cooling.

On an MDT control system the heating mode is activated when the remote temperature setpoint knob is turned to start the unit. See Energy Savings Modes for more information.

On all other systems the ventilation mode is dependant on the room temperature. The heating/ventilation/cooling operation is demonstrated below. The dotted line in the middle of the diagram represents the change between room temperature rise and room temperature fall. Select a point on the heavy line in the diagram to determine the mode of operation.

EXAMPLE: Start at point "A". The unit is in the ventilation mode and the room temperature is rising. Follow the dashed line upward. If the room temperature rises to a temperature that is 2°F over the cooling setpoint, the cooling will be enabled, and the unit will be in the cooling mode. Follow the solid line clockwise. Once the room temperature has fallen to the cooling setpoint, the cooling mode will be disabled, and the room will be in the ventilation mode. Follow the dashed

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Direct-Fired Indoor and Outdoor Units • MUA-SVP01A-EN

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Contents Controls Programming Guide JanuaryOverview Networking Direct-Fired Indoor and Outdoor Units MUA-SVP01A-EN Contents Contents Unit Operating Modes MDT ControlsMRT Controls MRT-Pro ControlsUnit Operating Modes MRT-Expert Controls Unit Operating Modes General Burner Control Heating ModeHeating/Ventilating/Cooling Operating Modes Unit Operating Modes Ventilation Mode Cooling Mode M P E R a T U R E S EManual Mode Damper Control ModesMixed Air Temperature Mode Building Pressure Mode Minimum Ventilation Functions100% Outside Air FreezestatUser Configured PID Control Direct Acting85ºF Reverse Acting Direct actingReverse acting Unit Resets Multiplexed InputsClock Set Fault Code Low Discharge Temperature DiagnosticsCritical Fault Codes Diagnostics Direct-Fired Indoor and Outdoor Units MUA-SVP01A-EN Fault Code Safety Circuit Open Fault CODEBurner Status SOLUTIONIf fan is running check prior alarm logFault Code Burner Hand Diagnostics Non-Critical Fault Codes Fault Code Flame FailureSolution If fan is not running Fault Code Unit off/Fan onSolution If fan is running Solution If fan/motor is not running Fault CODEUnit on/Fan offSOLUTIONIf fan/motor is running Fault Code Check Airflow Switches Fault Code Clogged Filter Switch SOLUTIONIf clogged filter switch is closingFault CODEEnergy Save Mode SOLUTIONIf setpoints are misadjustedSOLUTIONIf setpoints are not misadjusted Solution If OAT, RoomT or DAT are such that heat is requiredDiagnostics SOLUTIONIf heat is desired Fault CODEInsufficient OASolution If setpoints are misadjusted SOLUTIONIf less outside air is desired Diagnostics Unit Modes Hotkey Menu SelectionMenu Selection Tree for BACview Menu Selection SET Points HotkeyAlarm History 64 Most Recent Alarm HotkeyResets Hotkey Status Menu HotkeyUser Configurable Output Hotkey Schedules HotkeyClockset Hotkey Help HotkeyFuel Select Hotkey Thermostat Output Curve Ohms Thermistor Output CurveAirflow Station Layout Airflow station layoutZone 583 Controller Specifications Network CommunicationZone 583 Controller Specifications Rnet MRT-Pro or Room Air sensorTypical Wiring Schematic Non-recirculating with evap Dfoa and Dfia model diagramTypical Wiring Schematic Recirculating Dfoa and Dfia model diagrams Recirculating Dfoa and Dfia model diagram Typical Wiring Schematic Trane
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