Motor repair switches
Provides a non-fused fan motor safety-switch for each fan of a single row unit (ESTW-12 through ESTW-14) or one for each pair of fans on a dual-row unit (ESTW-22 through ESTW-29). Inside the fluid cooler each fan of a single-row unit or each pair of fans on a double-row unit are separated with an air deflector plate to allow a fan motor to be serviced without stopping the unit.
Epoxy coated fins
An epoxy coating is applied to the fins to protect them from damage in coastal installations where the aluminum fins on standard units are prone to corrosion from the presence of salt in the air. This option is recommended if the fluid cooler is installed within five miles of a coastal area. The epoxy coating has a slight insulating effect and the ability of the fins to dissipate heat is slightly diminished with approximately a 7% reduction in the overall capacity of the unit.