Fujitsu WSYK170DJ9/WOYK170LJL air-to-water heat pump

Fujitsu · Waterstage Super High Power

Fujitsu WSYK170DJ9/WOYK170LJL three-phase air-to-water heat pump

Heating: 17 kW
SCOP (55 °C): 3.33
Energy class (35 °C): A++
Water up to: 60 °C
Heats down to: -25 °C

Price for cash or bank transfer: 14,700 KM
Price for cards and card instalments: 16,339 KM

Prices include VAT, not installation.

About the Waterstage Super High Power series

The Waterstage Super High Power series is a split air-to-water heat pump with a wall-mounted hydraulic module, which the manufacturer recommends for renovation: older or poorly insulated houses and large rooms. It works with radiators and underfloor heating and, according to the manufacturer, holds a high flow temperature without the backup heater even at very low outdoor temperatures. With an optional tank it also prepares domestic hot water. Control follows a heating curve automatically, and with optional parts underfloor heating and radiators are controlled separately.

Certified heating data

Numbers from independent certification, not from advertising. Each row holds for the exact combination measured.

HP KEYMARK · water 35 °C (underfloor heating)

SCOP 4.11

Design load: 18 kW
Rated heating capacity (+7 °C): 17.11 kW
At -7 °C, at least: 16 kW
At -10 °C, at least: 14.9 kW

Measured combination: WOYK170LJL/WSYK170DJ9

View the certificate

HP KEYMARK · water 55 °C (radiators)

SCOP 3.33

Design load: 16.5 kW
Rated heating capacity (+7 °C): 15.53 kW
At -7 °C, at least: 15 kW
At -10 °C, at least: 12.4 kW

Measured combination: WOYK170LJL/WSYK170DJ9

View the certificate

The rating tests the unit on an imaginary reference house. The design load is what that house needs at the design temperature (−10 °C in the average European climate), not the unit’s capacity; where the unit falls short of it, the rating assumes an electric backup heater covers the difference. The “at least” figures show what the unit delivered to that house at the stated temperature, not the most it can give.

According to the manufacturer, the unit heats down to an outdoor temperature of -25 °C.

Heating capacity by outdoor temperature

The manufacturer's data from the design & technical manual: the maximum heating capacity at the outdoor temperature and the water temperature of the system. The calculator chooses a model by this table; the certified data above is what was measured independently.

Outdoor	Water 35 °C	Water 45 °C	Water 55 °C
−20 °C	10.77 kW	10.41 kW	9.63 kW
−15 °C	12.9 kW	12.36 kW	11.54 kW
−10 °C	15.04 kW	14.32 kW	13.44 kW
−7 °C	16.32 kW	15.49 kW	14.58 kW
−5 °C	17.17 kW	16.27 kW	15.35 kW
0 °C	19.31 kW	18.22 kW	17.25 kW
7 °C	24.27 kW	22.62 kW	17.79 kW

Source: Fujitsu General, Design & Technical Manual, heating capacity table. Open the manual

Technical data

Heating capacity (kW)	17
Energy class, water 35 °C (underfloor)	A++
Energy class, water 55 °C (radiators)	A++
SCOP	3.33
Power input, heating (W)	4,100
Refrigerant	R410A
Refrigerant charge (kg)	3.8
Pipe, liquid	9.52 mm
Pipe, gas	15.88 mm
Maximum pipe length (m)	30
Maximum height difference (m)	15
Power supply	400 V / 3 f / 50 Hz
Indoor unit, W × H × D (mm)	450 × 805 × 471
Outdoor unit, W × H × D (mm)	1,080 × 1,428 × 480
Indoor unit weight (kg)	52.5
Outdoor unit weight (kg)	138
Heats down to outdoor (°C)	-25
Maximum water temperature (°C)	60