Technical Data

Shoebox 3 - 6kW Technical Specifications

Nominal thermal kW rating3.06.0
Part NumberS3-P0KS6-P0K
MCS ApprovedBBA0055/31BBA0055/35
Performance data - rated heating output at B0/W35 BS EN14511
Power consumption0.8kW1.6kW
Co-efficient of Performance*4.053.84
Immersion heater outputKensa heat pumps do not feature back-up electric immersion heaters**
Brine (primary) based on 0°C in / -4°C out
Design flow rate kg/min9.218.4
Pressure drop kPa at design flow rate516
Max inlet temperature °C25
Min temperature °C (outlet)-5 (at standard settings)
Heating water (secondary) based on 30°C in / 35°C out
Design flow rate l/min8.6216.88
Pressure drop kPa at design flow rate1.00.64
Max flow temperature °C***65 (RHI applications 64C)65 (RHI applications 60C)
Electrical values at B0/W35
Rated voltage220-240 v / 50-60 Hz
Power supply rating amps1325
Rated current (max) amps714
Typical running current at B0/W35 amps48
Starting current amps****3034
Refrigerant circuit
Process mediumR134a
Fill volume kg0.71.6
Compressor typeReciprocal
H X W X L (mm)530 (H) X 475 (W) X 370 (D)560 (H) X 605(W)X 565(D)
Dry weight kg60100
Operating pressure
Brine circuit min (primary) bar g0.3
Heating water circuit min (secondary) bar g0.6
Low pressure reset bar g1.8
Connection sizes
Primary IN and OUTValves and anti-vibration leading to 22mm
Heating flow and returnValves and anti-vibration leading to 22mm
Performance (based on Average Climate) at 35°C
ErP ratingA+A+
Seasonal space heating energy efficiency139%130%
Performance (based on Average Climate) at 55°C
ErP ratingA+A+
Seasonal space heating energy efficiency1.121.11
Sound Power Level
Sound Power Level (dB)47dBA52dBA
* The COP figure quoted is calculated as per EN14511.
** In-built immersion heaters will increase running costs and CO2 emissions as they use direct electricity, because of this
Kensa heat pumps do not include them.
*** By increasing the flow temperature from the heat pump the efficiency of the unit will drop and the COP decreases.
****Kensa Shoebox heat pumps incorporate smart starts as standard to limit the starting current of the compressors. For full details on how the starting currents are calculated please contact Kensa.
*****The SCOP figure quoted is calculated as per EN14825.
Note: Design flow rates are for a ground temperature of 0°C and –4°C and a load temperature of 30°C and 35°C.