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

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

Unit Operating Modes

Building Pressure Mode

The Building Pressure mode varies the percentages of outside air and return air

to maintain a constant pressure within the space. A pressure transducer

compares the pressure outside the space to the pressure inside the space and

transmits a corresponding signal to the AdaptAire controller. The controller

compares this signal to the desired building pressure setpoint and uses a PID

loop to modulate the outside air and return air dampers to maintain the specified

building pressure.

MDT and MRT Controls. The MDT and MRT control systems do not support

building pressure control mode.

MRT-Pro Controls. To change the damper mode on an MRT-Pro control system

requires the use of a BACview or PC. See the section related to the MRT Expert

for instructions on how to use the BACview for programming.

MRT-Expert Control. To place the damper operation in Building Pressure Mode

scroll through the menu tree, locate the Damper Mode branch and select Bldg Prs

Ctrl. Next, scroll through the menu tree, locate the Setpoints branch, select Bldg

Prs, and enter the desired pressure. The allowable range is -0.05"wc to +0.05"wc.

If the unit served by this control is a direct-fired heater, that recirculates air before

the burner, and is operating in the heating mode, the unit will automatically keep

the minimum outside air at 20%. If the outside air drops below 20%, the burner

will cycle off. See Minimum Ventilation.

Contents

Main Overview NETWORKING ADAPTAIRE DEFAULT SETTINGS Page Contents Unit Operating Modes Functions Diagnostics Menu Selection Contents Thermostat Output Curve Airflow Station Layout I/O Zone 583 Controller Specifications Typical Wiring Schematic Unit Operating Modes MDT Controls: MRT Controls: MRT-Pro Controls: Page MRT-Expert Controls: Page Heating/Ventilating/Cooling Operating Modes Heating Mode General Burner Control Page Ventilation Mode Cooling Mode Figure 1. Cooling Mode Damper Control Modes Manual Mode Mixed Air Temperature Mode Building Pressure Mode Functions 100% Outside Air Minimum Ventilation Freezestat Clogged Filter User Configured PID Control DIRECT ACTING Page REVERSE ACTING Page Unit Resets Multiplexed Inputs Clock Set Diagnostics Critical Fault Codes FAULT CODE: Low Discharge Temperature Page SOLUTION: If burner was not operating prior to shutdown (check prior alarm log) FAULT CODE: Safety Circuit Open SOLUTION:If fan is running (check prior alarm log) FAULT CODE:Burner Status FAULT CODE: Burner Hand FAULT CODE: Flame Failure Diagnostics - Non-Critical Fault Codes FAULT CODE: Unit off/Fan on SOLUTION: If fan is running SOLUTION: If fan is not running FAULT CODE:Unit on/Fan off SOLUTION:If fan/motor is running SOLUTION: If fan/motor is not running FAULT CODE: Check Airflow Switches SOLUTION:If high airflow switch is opening. Do not adjust the switch setpoints SOLUTION:If low airflow switch is opening. Do not adjust the switch setpoints FAULT CODE: Clogged Filter Switch SOLUTION:If clogged filter switch is closing. FAULT CODE:Energy Save Mode 1 SOLUTION:If setpoints are misadjusted SOLUTION:If setpoints are not misadjusted FAULT CODE:Energy Save Mode 2 SOLUTION: If OAT, RoomT or DAT are such that heat is required FAULT CODE:Energy Save Mode 3 SOLUTION: If OAT, RoomT or DAT are such that heat is required SOLUTION: If setpoints are misadjusted FAULT CODE:Insufficient OA SOLUTION:If heat is desired SOLUTION:If less outside air is desired Page Menu Selection Tree for BACview UNIT MODES HOTKEY - 2 Menu Selection Status Alarm SET POINTS HOTKEY - 3 STATUS MENU HOTKEY - 4 Note: The Status Menu always displays the current status of the fan, burner and cooling. ALARM HOTKEY - 1 Alarm History (64 Most Recent) RESETS HOTKEY - 6 SCHEDULES HOTKEY- 7 USER CONFIGURABLE OUTPUT HOTKEY - 8 CLOCKSET HOTKEY - 0 HELP HOTKEY - 5 FUEL SELECT HOTKEY - 9 10 K Ohms Thermistor Output Curve Thermostat Output Curve Resistance (Ohms) Typical 10,000 Ohm Thermistor Output Curve Resistance (Ohms) Typical 10,000 Ohm Thermistor Output Curve Page I/O Zone 583 Controller Specifications I/O Zone 583 Controller Specifications OUTPUT ASSIGNMENTS - ANALOG RNET MRT-Pro or Room Air sensor OUTPUT ASSIGNMENTS - DIGITAL INPUT ASSIGNMENTS - UNIVERSAL