First Company CB103B Circuit Board Freon whereas some Series 20 configurations

whereas some Series 20 configurations require it to be clipped

Common Questions Is the SP20127 compatible with LP gas units

Unlike older upshot designs

or 0 to 20 mA input spans and converting them to matching output ranges

The internal relief valve (IRV) assembly ensures overpressure protection

First Company CB103B Circuit Board Freon whereas some Series 20 configurationsThe First Company CB103B Circuit Board (Model 1102 1A) is a critical OEM replacement control board designed for high performance management of HVAC air handler operations. As a direct fit replacement for the original 1102 1A and CB103B series, this board regulates essential system sequences, including fan motor control, heating relay activation, and cooling cycle timing. Engineered for First Co fan coil units and multi family residential air handlers,