TWW EVI Urban

Tandem high temperature heat pump water - water

Heat pump with two scroll compressors in single refrigeration cycle and high flow temperature of up to 70ºC. Stable frame construction and flexible outputs. Double high-absorption suspension with sylomer pads and adjustable feet base plates ensure low noise and vibration levels of the hermetic SCROLL compressors.

Stainless steel plate heat exchanger (1.4401) for heating circuit. Stainless plate plate heat exchanger (1.4401) for source circuit. Electrical switchboard with integrated safety elements and equithermal controller of the heat pump is located under the upper lid. With electronic starter via built-in soft starter and electronic expansion valve control with autoadaptivity.

Frame construction with a massive base plate on adjustable legs. Covering the epoxy-coated unit. The multi-layer sound insulation and vibration-eliminating profiles are glued from the inside of the cover. Equithermal, digital control of the heat pump with integrated cooling control function (passive cooling). For controlling two heating circuit with mixing unit. Using the cooling function (passive cooling) and the two cooling circuit with mixing units. Temperature regulation for DHW storage tank and control of electrical auxiliary heating. Simple extension of control up to 3 heating / cooling circuits via expansion modules or up to 16 circuits via system controllers. The standard version also includes solar control as well as the possibility of cascading up to 16 devices.

Full-text control menu with features dependent on user instructions, information texts and status output signal. Diagnostic system with record history of operation. External temperature sensor, hotgas sensor, liquid refrigerant temperature sensor, heat pump flow and return temperature sensor as well as source output sensor, source return sensor, and hot water sensor.

Optionally available with ModBus module as well WebControl control and monitoring via the Internet.


Heat pump type TWW 28 EVI TWW 36 EVI TWW 48 EVI TWW 60 EVI TWW 91 EVI TWW 105 EVI TWW 120 EVI
Article nr. WA001361 WA001362 WA001363 WA001364 WA001365 WA001366 WA001367
Refrigerant R410a R410a R410a R410a R410a R410a R410a
Heating capacity [ kW ]
W10/W35 28.10 36.00 48.20 60.40 91.00 104.80 120.20
W15/W35 32.26 41.33 55.33 69.34 104.47 120.31 137.99
W7/W35 26.08 33.41 44.73 56.05 84.45 97.25 111.55
W10/W55 28.89 37.01 49.55 62.09 93.55 107.73 123.57
Input [ kW ]
W10/W35 4.61 5.80 7.77 10.06 15.96 18.38 21.46
Performance COP
W10/W35 6.1 6.2 6.2 6.0 5.7 5.7 5.6
Parameter of heat rejection
Maximal flow temperature [ ºC ] +65°C (∆T10K=70ºC) +65°C (∆T10K=70ºC) +65°C (∆T10K=70ºC) +65°C (∆T10K=70ºC) +65°C (∆T10K=70ºC) +65°C (∆T10K=70ºC) +65°C (∆T10K=70ºC)
Minimal flow temperature [ ºC ] +20°C +20°C +20°C +20°C +20°C +20°C +20°C
Flow nominal [ m3/h ] 1.74 ~ 3.48 2.23 ~ 4.45 2.98 ~ 5.96 3.74 ~ 7.47 5.63 ~ 11.25 6.48 ~ 12.95 7.43 ~ 14.86
Pressure drop ( max. ) [ kPa ] 20 20 20 20 20 20 20
∆T recommended [ K ] 5 5 7 7 7 7 7
Connection port size [ " ] 1.1/4" 1.1/2" 2" 2" 2" 2" 2"
Parameter of low potential heat source ( source )
Minimal source temperature [ ºC ] -5°C -5°C -5°C -5°C -5°C -5°C -5°C
Maximal source temperature [ ºC ] +25°C +25°C +25°C +25°C +25°C +25°C +25°C
Flow source nominal [ m3/h ] 2.54 ~ 5.08 3.27 ~ 6.53 4.37 ~ 8.74 5.44 ~ 10.88 8.11 ~ 16.22 9.35 ~ 18.69 10.68 ~ 21.35
Pressure drop source ( max. ) [ kPa ] 12 12 12 20 20 20 20
∆T recommended source [ K ] 4 4 4 4 4 4 4
Connection port size source [ " ] 1.1/2 2 2 2 2 2 2
Parameter of electrical connection and planing
Mains dimension [ mm2 ] 5x6 5x6 5x6 5x6 5x10 5x10 5x10
Voltage [ V ] 3 x 400 3 x 400 3 x 400 3 x 400 3 x 400 3 x 400 3 x 400
Safety protection [ A ] 20 25 32 40 80 80 80
Current - nominal [ A ] 8.87 11.35 18.96 23.78 42.42 43.75 47.15
Current - maximal [ A ] 18.40 21.80 32.00 37.20 64.10 66.00 74.80
Current - Start [ A ] 2x11.56 2x15.06 2x25.16 2x31.73 2x56.91 2x58.42 2x63.04
Softstart 2 x MCI 12 2 x MCI 12 2 x MCI 15 2 x MCI 25 2 x MCD 201 2 x MCD 201 2 x MCD 201
Energy Efficiency Parameters and Performance ErP [ middle region Brussels ]
Energy class A++ A++ A++ A++ A++ A++ A++
SCOP 6.00 6.12 6.14 5.96 5.67 5.68 5.58
Seasonal energy efficiency η [ % ] 240 245 246 238 227 227 223
Rated nominal heating capacity P rated [ kW ] 28 36 48 60 91 105 120
Bivalent point [ ºC ] -10 -10 -10 -10 -10 -10 -10
Sound emissions - indoor Lw [ dB(A) ] 51 52 53 54 56 56 57
Sound emissions - outdoor Lw [ dB(A) ] - - - - - - -

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