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All hands to the heat pump

While the winter weather bites, and government incentives remain, it is no surprise that it is heat pump technology that is at the forefront of change. RAC reports on two new products

Fujitsu upgrades two-pipe VRF heat pump

Fujitsu is updating its two-pipe heat pump VRF offering with the launch of the Airstage V-III range, promising more sizes and advanced features. The new range replaces the five-year-old V-II and adopts many features from the latest three-pipe VR-II equipment.

While the V-II range had five outdoor models, ranging from 22.5 kW to 45 kW, the V-III has an additional 50 kW model, with all sizes now using a single DC compressor, resulting in lower starting currents and improved part-load performance.

The extra model provides additional combination options up to 150 kW, a substantial increase on the previous 135kW maximum, the company notes.

Almost all EER and COP rates in the range have been improved, Fujitsu says, with the 22.5 kW units having a heating COP of 4.84 and a cooling EER of 4.31.

The maximum number of connectable indoor units is 64, with a maximum connectable capacity of up to 150 per cent. The pipe length from the first separation tube to the furthest indoor unit has now been increased to 90 m.

“This is just the first of a raft of innovations we will be launching over the coming months,” says Fujitsu Air Conditioning’s sales and marketing director Ian Carroll. “They have all been developed with the help of feedback from the market.

Our aim is to provide exactly the types of products that contractors, specifiers and end-users are asking for.”

LG targets refurbishment

LG says its air-to-water Therma V Monobloc is a response to market demands in the new-build and refurbishment sector, with the range starting at a small 3 kW unit.

Therma V offers low/medium temperature heating and domestic hot water supply, along with an easy-to-use and stylish controller and user guides.

The Therma V range is being marketed by LG as the “true all-in-one Monobloc” because the key components – the plate heat exchanger, the water pump, the expansion tank and the electric heater – are pre-installed at the factory.

This makes for a simpler installation, saving time and money for the contractor and providing a quieter unit for the home owner, as all components are outside, the company says.

Another major feature of Therma V is energy efficiency. Proportional-Integral (PI) logic enables the new model to operate up to 30 per cent more efficiently than a conventional model, while LG’s BLDC inverter compressor also saves energy, using as much as 40 per cent lower electricity than a typical AC motor at low speeds and 20 per cent less at high speeds, the manufacturer notes.

In line with all of LG’s outdoor units, the Therma V comes complete with the firm’s Gold-Fin epoxy coating on the coils. This prevents corrosion – making Therma V a good choice for coastal areas – while prolonging the units’ life and, LG notes, the golden coating gives them a premium appearance.

Among the range’s control features are LG’s pressure control sensor, which measures and controls pressure directly, translating to faster, more precise adjustments in response to load variation.

In the event of a fault, Therma V has a built-in two-step emergency operation feature, a back-up system that claims to provide consistent heat production until the system is serviced, as well as providing reassurance for the home owner.

Other features include a Weather Dependent Operation mode, which automatically adjusts the temperature indoors in response to changes in the temperature outdoors, and a Silent mode, which helps to lower operational noise at night-time.

The Therma V Monobloc is available in sizes from 3 kW to 16 kW, including a standard three-year warranty, extendable to five years, subject to terms and conditions.

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