How Are Electrical Components Protected During Coating?
Key facts
| Component | Treatment |
|---|---|
| Control box and PCBs | Masked, not coated |
| Sensors and thermistors | Masked |
| Terminals and connectors | Masked |
| Expansion and service valves | Masked |
| Refrigerant connections | Masked |
| Coil and exposed metal | Coated, air-dry cure |
Masking by checklist
Each unit type has a masking checklist listing every component to be covered. The first unit of a batch is checked against the list and photographed before coating.
Why boards are not coated
Printed circuit boards need a conformal coating designed for electronics, applied under controlled conditions. A coil coating is not a substitute. Ask the unit manufacturer whether a factory conformal-coated board option exists for coastal projects.
After coating
Masking is removed once the coating has cured, connectors are inspected, and the unit is function-checked — power-on, and pressure checks where the refrigerant circuit was opened.
What this means for your project
Send the unit model with the enquiry so the masking checklist can be prepared. If boards need protection too, raise it with the manufacturer at the order stage.
