Indoor  unit models are

HU091 U41,- 9 Kw capacity

HU121 U31 – 12 Kw capacity

HU141 U31 – 14 Kw capacity

HU161 U31- 16 Kw capacity

All are MCS approved products.
The indoor unit (Hydro) works in the same way as a Conventional central heating boiler, except that it uses heat  recovered from the outdoor air instead of gas  or oil.                                                                     Hydro Unit                                                                     Outdoor unit

The Therma-V  continues to operate even when the outside temperature drops to -20°C.

Optimum efficiencies are obtained at low water temperatures, so the system is ideally suited for under-floor heating.

Hot water supply

Therma-V  is designed to provide hot water, in addition  to central  heating in domestic applications.

Therma-V  can heat  the water in the tank to 48 °C without using  electric  heaters. There  is provision to program an automatic weekly sterilisation  process at a higher temperature, using  electric  heating.

It is possible to combine Therma V with solar heating, taking advantage of free heating when it is available. A tank with twin coils is used in this process.

The LG tank kit (Part no: PHLTA) is required when a hot water tank is fitted. It includes a thermistor to monitor and  control  the hot water temperature.

A suitable water tank should  have the following features:

                                            

●  Be designed for heat  pump applications, meaning that the internal  coil should  have sufficient  surface area  to heat  the tank using  water at 55°C.

●  A twin coil tank is required if solar heating is added.

●  The tank should  have an immersion heater with a variable thermostat (in addition  to the safety cut-out).

•    There  should  be a suitable pocket to insert  the LG thermistor.

●  The LG tank kit is used to measure and  control  the tank water temperature.