Water Source Heat pumps TWW EVI Urban below 60 kW

Heat pump with two power stages for heating and domestic hot water with the possibility of passive cooling control. One short closed refrigerant circuit with a pair of quiet Scroll compressors and robust stainless steel plate heat exchangers. Through the connection kit, the circulation pumps can be easily and quickly connected while externally controlling their variable speed.
Use for multi-family dwellings, suburban mixed-use buildings or commercial operations. The Urban range is based on a robust construction quality steel for all parts. High quality, long proven heat pump circuit components extend the life of the heat pump.
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: TWW 28 EVI 36 EVI 48 EVI 60 EVI
Product sheet
Article nr. WA001361 WA001362 WA001363 WA001364
Heating capacity [ kW ] EN 14511
W10 / W35 (max) 29.4
(14.7 ~ 29.4)
37.7
(18.9 ~ 37.7)
50.5
(25.3 ~ 50.5)
63.2
(31.6 ~ 63.2)
W10 / W35 (min) 14.7
(14.7 ~ 29.4)
18.9
(18.9 ~ 37.7)
25.3
(25.3 ~ 50.5)
31.6
(31.6 ~ 63.2)
W10 / W34 29.4
(14.7 ~ 29.4)
37.7
(18.9 ~ 37.7)
50.6
(25.3 ~ 50.6)
63.2
(31.6 ~ 63.2)
W10 / 55 (max) 28.8
(14.4 ~ 28.8)
37.3
(18.6 ~ 37.3)
51.3
(25.6 ~ 51.3)
63.2
(31.6 ~ 63.2)
W10 / W55 (min) 14.4
(14.4 ~ 28.8)
18.6
(18.6 ~ 37.3)
25.6
(25.6 ~ 51.3)
31.6
(31.6 ~ 63.2)
W10 / W52 29.2 (14.6 ~ 29.2) 37.7 (18.9 ~ 37.7) 51.5 (25.8 ~ 51.5) 63.8 (31.9 ~ 63.8)
Energy Efficiency Parameters and Performance ErP [ middle temperature region ]
Rated nominal heating capacity P rated [ kW ] 29.4 37.7 50.5 63.2
Energy class A+++ A+++ A+++ A+++
SCOP 7.53 7.33 6.70 6.19
Seasonal energy efficiency η [ % ] 301.3 293.4 268.0 247.6
Bivalent point [ ºC ] -10 -10 -10 -10
Parameter of heat sink
Maximal flow temperature [ ºC ] 65 65 65 65
Minimal flow temperature [ ºC ] 25 25 25 25
Flow nominal [ m3/h ] [@35/30] 2.55 ~ 5.09 3.27 ~ 6.53 4.37 ~ 8.74 5.47 ~ 10.94
Pressure drop [ kPa ] [@35/30] 20 20 20 20
Nominal ∆T [ K ] [@W35°C] 5 5 5 5
Nominal ∆T [ K ] [@W55°C] 8 8 8 8
Nominal ∆T [ K ] [@W65°C] 10 10 10 10
Connection port size [ " ] 1.1/4" 2" 2" 2"
Parameter of low temperature heat source
Minimal source temperature [ ºC ] -10 (7) -10 (7) -10 (7) -10 (7)
Maximal source temperature [ ºC ] 30 30 30 30
Flow source nominal [ m3/h ] 2.67 ~ 5.35 3.42 ~ 6.85 4.54 ~ 9.08 5.59 ~ 11.19
Pressure drop source [ kPa ] 12 12 12 20
Nominal ∆T source [ K ] 4 4 4 4
Connection port size source [ " ] 1.1/2 2 2 2
Electrical parameters
Voltage [ V ] 3~ 400/50 3~ 400/50 3~ 400/50 3~ 400/50
Safety protection [ A ] C20 C25 C32 C40
Current - nominal [ A ] 8.56 11.16 18.64 23.50
Current - maximal [ A ] 18.40 21.80 32.00 37.20
Current - Start [ A ] 11.56 15.06 25.16 31.73
Softstart - - - -
Sound information
Sound power - indoor Lw [ dB(A) ] 52.6 53.7 55.1 57.5
Sound power - outdoor Lw [ dB(A) ]
Sound pressure Lp in 1 meter [ dB(A) ] 44.6 45.7 47.1 49.5
Sound pressure Lp in 5 meter [ dB(A) ] 30.6 31.7 33.1 35.5
Sound pressure Lp in 10 meter [ dB(A) ] 24.6 25.7 27.1 29.5
Sound pressure Lp in 15 meter [ dB(A) ] 21.1 22.2 23.6 26.0
14 - 16 =


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