A complete MicroM System includes the appropriate flame detector, plug-in amplifier, programmer module, standard chassis and wiring base. The part numbers for each module are the same as in the MC Series with an additional "E". For example: The old MC120 chassis is now a MEC120, the MP230 programmer module is now a MEP230, and the MAUV1 UV amplifier is now a MEUV1.
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The A419 Series control by Johnson Controls is a line voltage, single-stage, electronic temperature control with a Single-Pole, Double-Throw (SPDT) output relay. It features a keypad for programming, and an LCD for viewing temperature and the status of other functions. A front panel LED indicates relay status.

The A419 has heating or cooling modes of operation with adjustable setpoint and differential, a lockable keypad, adjustable anti-short cycle delay, and binary input for temperature offset. The A419 combines remote sensing capability and interchangeable sensors with electronic accuracy in a NEMA 1 high-impact plastic enclosure suitable for surface or din-rail mounting.

Features and Benefits

Easy to Read LCD Display Displays temperature and other function status. Custom icons indicate system status at a glance. Digital display allows precise setpoint setting.

Front Panel Keypad with Lock Allows the user to quickly change setpoint, differential, and other functions. Concealed jumper deters unauthorized changes to control settings.

Offset Function Allows the user to shift the setpoint by an adjustable amount based on the status of an external switch, such as a time clock.

Interchangeable Temperature Sensors and Mounting Accessories Allows flexibility in application; increases versatility and serviceability, and allows cable lengths up to 800 feet.

Wide Adjustable Differential
1 to 30 F° or C° Enables the user to optimize system performance for a given application; allows a tighter differential than typical electromechanical controls (1F° or C°).

Field-selectable Mode Jumpers Enables the user to select either Heating or Cooling mode and whether cut-in or cut-out occurs at setpoint.

Sensor Failure Indication Allows the user to determine how rapidly the control can cycle the load off and on.

Anti-short Cycle Time Delay Allows the user to determine how rapidly the control can cycle the load off and on.