Water Source Heat pumps WW EVI

Compact heat pump for heating and domestic hot water with passive cooling control. A short closed refrigerant circuit with a quiet scroll compressor helps for long-term stable operation.
Use for single-family houses and smaller buildings with a heat output requirement of up to 20 kW. The COMFORT range includes robust heat pump internal refrigerant circuit parts as well as all the measuring, distribution and control elements required by today's modern climate technology in single-family houses.
As a primary source, thermal energy from underground water at a depth of between 12 and 30 metres is used. A submersible pump delivers the groundwater to the heat pump and, depending on the quality and chemical composition, the heat from the groundwater is extracted either directly in the heat pump or through a separating heat exchanger with an intermediate circuit and antifreeze. The heat pump then raises this temperature to a usable temperature for heating or hot water.

Heat pump type: WW Comfort 14 EVI 18 EVI
Product sheet
Article nr. WA001302 WA001303
Heating capacity [ kW ] EN 14511
W10 / W35 (max) 14.7 18.9
W10 / W35 (min) 14.7 18.9
W10 / W34 14.7 18.9
W10 / 55 (max) 14.4 18.6
W10 / W55 (min) 14.4 18.6
W10 / W52 14.6 18.9
Energy Efficiency Parameters and Performance ErP [ middle temperature region ]
Rated nominal heating capacity P rated [ kW ] 14.7 18.9
Energy class A+++ A+++
SCOP 7.46 7.27
Seasonal energy efficiency η [ % ] 298.5 290.9
Bivalent point [ ºC ] -10 -10
Parameter of heat sink
Maximal flow temperature [ ºC ] 65 65
Minimal flow temperature [ ºC ] 25 25
Flow nominal [ m3/h ] [@35/30] 2.55 3.26
Pressure drop [ kPa ] [@35/30] 12 12
Nominal ∆T [ K ] [@W35°C] 5 5
Nominal ∆T [ K ] [@W55°C] 8 8
Nominal ∆T [ K ] [@W65°C] 10 10
Connection port size [ " ] 1.1/4" 1.1/4"
Parameter of low temperature heat source
Minimal source temperature [ ºC ] -10 (7) -10 (7)
Maximal source temperature [ ºC ] 30 30
Flow source nominal [ m3/h ] 3.57 4.56
Pressure drop source [ kPa ] 12 12
Nominal ∆T source [ K ] 3 3
Connection port size source [ " ] 1.1/4 1.1/4
Electrical parameters
Voltage [ V ] 3~ 400/50 3~ 400/50
Safety protection [ A ] C20 C25
Current - nominal [ A ] 4.28 5.58
Current - maximal [ A ] 9.20 10.90
Current - Start [ A ] 11.55 15.06
Softstart MCI 12 MCI 12
Sound information
Sound power - indoor Lw [ dB(A) ] 45.9 45.1
Sound power - outdoor Lw [ dB(A) ]
Sound pressure Lp in 1 meter [ dB(A) ] 37.9 37.1
Sound pressure Lp in 5 meter [ dB(A) ] 23.9 23.1
Sound pressure Lp in 10 meter [ dB(A) ] 17.9 17.1
Sound pressure Lp in 15 meter [ dB(A) ] 14.4 13.6
17 - 7 =


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