The new Dometic MTCGV modular chiller provides installation flexibility, reliability, maximum performance, and easy access for maintenance and repair. It makes an ideal drop-in replacement for Dometic MTC R-407C units. The MTCGV modules heat and cool in capacities of 24,000-120,000 BTU/h (2 to 10 tons). Up to six modules can be staged to achieve higher capacities. Thermal expansion valves optimize performance over a wide range of conditions, while a hot gas bypass valve maintains heating performance in cold seawater. With reverse-cycle heating effectiveness in seawater temperatures as low as 38 °F (3.5 °C), the need for separate fossil fuel or electric water heaters largely eliminated. Sub-modules can be rotated to achieve more convenient water connection locations or compressor access for a reliable performance. The sub-modules can even be separated for remote mounting when space is limited. These kind of sub-module changes can be handled in the field, or specially ordered from the factory. All units have built-in protection devices, including: high- and low-pressure switches, a loop-water flow switch, hot-gas bypass valve, and loop-water freeze sensor. A wire harness with polarized plug is included for easy electrical connections. Heating and cooling you can rely on!