Unit Operating Modes
to be "off" and the Cooling Night Setback function turns the unit "on", the unit will be cycled "off" once the room air temperature has fallen 2° below the Cooling Night Setback setpoint. The default for this setpoint is 100°F and is fixed at 27° above the Cooling setpoint. Changing the Cooling setpoint changes the Cooling Night Setback setpoint.
Auxiliary Unit Enable. The Auxiliary Unit Enable function overrides all other Auto Mode functions and automatically cycles the unit into operation. This function is activated whenever a contact is closed between the appropriate terminals on the unit's terminal strip located in the unit's main control panel. See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information. This function can be used with a twist timer, toggle switch, door switch, exhaust fan interlock, or any other dry contact to override the time clock schedule.
MRT-Expert Controls:
The AdaptAire
UNIT OFF MODE
Off Mode is the default unit operational mode. To place the unit in Off Mode scroll through the Unit Modes menu tree, locate the AUTO/OFF/MANUAL branch, and select OFF. This will place the unit in the OFF mode. The OFF mode prevents the fan and burner from starting. This mode will override the Time Clock and Night Setback functions.
UNIT MANUAL MODE
Manual Mode allows the supply fan to turn on regardless of the Time Clock or Night Setback functions. Heating and cooling functions use the Night Setback Setpoints. To place the unit in Manual Mode scroll through the Unit Modes menu tree, locate the AUTO/OFF/MANUAL branch, and select MANUAL. This will place the unit in the MANUAL mode.
UNIT AUTO MODE
Auto Mode has four different functions that control the supply fan and unit operation. They are a time clock function, heating and cooling night setbacks, and a signal from an external source to an auxiliary digital input. To place the unit in Auto Mode scroll through the Unit Modes menu tree, locate the AUTO/OFF/ MAN branch, and select AUTO. This will place the unit in the AUTO mode. This activates the four Auto mode functions.
Scheduling Time Clock. The primary Auto Mode function is the Time Clock Schedule. The Time Clock function allows the user to schedule the operational times of the unit. There are four different schedules available: 24 hour continuous operation, daily, holiday, and override. The daily schedule can be programmed
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