Honeywell 198162GA Modutrol transformer

This is a Honeywell 198162GA Modutrol transformer, catalogued under actuator components. Transformers of this type supply the low-voltage power required to drive the motor inside a Modutrol actuator. The actuator itself positions air dampers or mixing valves in response to a control signal, and the transformer is a separate part that can be replaced independently if the actuator motor no longer receives power. When sourcing a replacement, confirm the transformer’s electrical ratings (primary and secondary voltage) match the existing actuator and control circuit. Also verify the mechanical fit – the transformer may be mounted inside the actuator housing or externally, depending on the specific model. Parts of this type are selected by their output voltage and current capacity; using an incorrect transformer can cause sluggish operation or damage the actuator motor. During service, check for signs of overheating (discoloured winding or melted insulation) which indicates a failing transformer or an overloaded actuator.