| 1M | Higher available pressure for fan. |
| 2M | Higher available pressure for fan. |
| AE | Electrical power supply different from standard. |
| BF | Low temperature operation (−20°C) with inverter fan speed regulation. |
| BFa | Low temperature operation (−20°C) with inverter fan speed regulation (with 1M option). |
| BFb | Low temperature operation (−20°C) with inverter fan speed regulation (with 2M option). |
| BT | Low temperature operation (−20°C) with modulating fan speed regulation. |
| BTa | Low temperature operation (−20°C) with modulating fan speed regulation (with 1M or 2M option). |
| CF | Soundproofed compressors cabinet (included on ultra-silenced version). |
| CI | Soundproofing jackets on compressors (not available on ultra-silenced version). |
| CS | Compressor pick-up counter. |
| GP | Coil protection grid. |
| HG | Hot gas by-pass. |
| IH | RS-485 serial interface. |
| IM | Seawood packing. |
| MF | Phase monitor. |
| MT | High and low pressure gauges. |
| MV | Buffer tank/expansion vessel/safety valve/water gauge/water charge and discharge valves/air discharge valves. |
| P1 | Pump group/expansion vessel/safety valve/water gauge/water charge and discharge valves/air discharge valve. |
| P1H | High head pump group/expansion vessel/safety valve/water gauge/water charge and discharge valves/air discharge valve. |
| PA | Rubber-type vibration dampers. |
| PF | Safety water flow switch on evaporator. |
| PQ | Remote microprocessor. |
| RA | Anti-freeze heater on evaporator. |
| RL | Compressors overload relays. |
| RM | Epoxy coating of condensing coil for sea environment. |
| RR | Condensing coil with copper/copper fins. |
| RV | Personalized RAL paint. |
| VB | Brine version (water temperature < 0°C). |
| VS | Solenoid valve. |