MicroTech III Unit Controller with Optional ECM Motor, Desuperheater,
Electric Heat Coil & I/O Expansion Module – 208/230/460/60 Hz/3-Phase
Drawing No. 668991301
Wiring diagrams are typical. For the latest drawing
version refer to the wiring diagram located on the
inside of the controls access panel of the unit.
Note: Gray tinted areas in the wiring diagram: Units with factory installed communication module include Discharge Air Temperature (DAT) and Return
Air Temperature (RAT) sensors shipped loose and are field installed. The Leaving Water Temperature (LWT) sensor is factory installed. Entering Water
Temperature (EWT)sensor is included with ECM and/or Secondary Electric Heat.
IM 930-6 • Enfinity Vertical Water Source Heat Pumps
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