| Model Code | Description | |
|---|---|---|
| 01 | 641.813, 641.817, 641.893 | HEATER UNIT,PUMP,WIRE CABLE |
| 02 | 649.813, 649.857 | HEATER UNIT,PUMP,WIRE CABLE |
| 03 | 641.813, 641.817, 641.893 | AUTOMATIC REGULATION |
| 04 | 641.813, 641.817, 641.893 | H.D. |
| 05 | 641.813, 641.817, 641.893 | TROPICAL VERSION |
| 06 | 641.813, 641.817, 641.893 | HEATED OMITTED ELIMINATION |
| 07 | 649.813, 649.857 | HEATED OMITTED |