Unit Operating Modes
There are three different modes that control the supply fan and unit operation:
•Off
•Manual
•Auto
There are also four different methods for controlling the operating modes:
•"a remote panel with two rotating knob adjustments (MDT and MRT controls)
•"a remote panel with one rotating knob and an intelligent room sensor (MRT- Pro controls)
•"an intelligent room sensor and local user interface panel with LCD display (MRT-
•any of the above controls with a
MDT Controls:
MDT, modulating discharge temperature, is the most basic AdaptAire control for discharge temperature. The MDT control system includes a remote control panel equipped with 1 or 2 potentiometers, 3 or more pilot lights, and up to 2 switches.
UNIT OFF MODE
Off Mode is the default unit operational mode. To place the unit in the Off Mode, rotate the "temperature setpoint" knob on the remote control panel counterclockwise to the stop. This will place the unit in the OFF mode and extinguish the "unit enable" light. The OFF mode prevents the unit from starting
UNIT MANUAL MODE
Manual Mode allows the unit to turn on. To place the unit in the Manual Mode, rotate the "temperature setpoint" knob on the remote control panel clockwise to the desired discharge air temperature setpoint. This will place the unit in the MANUAL mode and enable the burner. See Heating/Ventilating/Cooling Modes and Energy Saving Modes of this manual for more information.
UNIT AUTO MODE
Auto Mode has four different functions that control the unit operation. They are a time clock, heating and cooling night setbacks, and a signal from an external source.
The MDT control does not support the time clock, night setback, or auxiliary unit enable functions.
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