This document introduces the design principle, features and usage of the Motortronics MWH series solid state motor winding heater.
This manual provides installation and operation instructions for the Motortronics MWH series solid state motor winding heaters. It includes wiring diagrams, specifications, and LED status indicators for models rated at 10A, 25A, 50A, and 80A. The unit prevents condensation buildup in motor windings by applying low-level current when the motor is off. It features automatic operation, overload sensing, and safety design with a fiber-glass insulated chassis. Installation requires proper mounting, wiring according to voltage ratings, and adherence to local electrical codes.
| Max Amp Rating | 10A, 25A, 50A, 80A |
|---|---|
| Fusing | Two fuses protect the MWH |
| Dimensions | 6.2"H x 4.5"W x 6"D for MWH-10; 10"H x 8"W x 8"D for MWH-80 |
It applies a low-level current to the AC motor windings when the motor is off to prevent condensation buildup.
The MWH automatically shuts off when the motor is started and turns back on approximately one minute after the motor is turned off.
The 'Power On' LED indicates that power is on and both fuses are good.