Technical Data

Shoebox 3 - 6kW Technical Specifications

Phase Single Single
Nominal thermal kW rating 3.0 6.0
Part Number S3-P0K S6-P0K
MCS Approved BBA0055/31 BBA0055/35
Performance data - rated heating output at B0/W35 BS EN14511
Power consumption 0.8kW 1.6kW
Co-efficient of Performance* 4.05 3.84
Immersion heater output Kensa heat pumps do not feature back-up electric immersion heaters**
Brine (primary) based on 0°C in / -4°C out
Design flow rate kg/min 9.2 18.4
Pressure drop kPa at design flow rate 5 16
Max inlet temperature °C 25
Min temperature °C (outlet) -5 (at standard settings)
Heating water (secondary) based on 30°C in / 35°C out
Design flow rate l/min 8.62 16.88
Pressure drop kPa at design flow rate 1.0 0.64
Max flow temperature °C*** 65 (RHI applications 64C) 65 (RHI applications 60C)
Electrical values at B0/W35
Rated voltage 220-240 v / 50-60 Hz
Power supply rating amps 13 25
Rated current (max) amps 7 14
Typical running current at B0/W35 amps 4 8
Starting current amps**** 30 34
Refrigerant circuit
Process medium R134a
Fill volume kg 0.7 1.6
Compressor type Reciprocal
Dimensions
H X W X L (mm) 530 (H) X 475 (W) X 370 (D) 560 (H) X 605(W)X 565(D)
Dry weight kg 60 100
Operating pressure
Brine circuit min (primary) bar g 0.3
Heating water circuit min (secondary) bar g 0.6
Low pressure reset bar g 1.8
Connection sizes
Primary IN and OUT (speedfit) mm 3/4” BSP Parallel with 22mm Adaptor valves
Heating flow and return (speedfit) mm
Performance (based on Average Climate) at 35°C
ErP rating A+ A+
SCOP***** 3.68 3.45
Seasonal space heating energy efficiency 139% 130%
Performance (based on Average Climate) at 55°C
ErP rating A+ A+
SCOP***** 2.99 2.97
Seasonal space heating energy efficiency 1.12 1.11
Sound Power Level
Sound Power Level (dB) 47dBA 52dBA

* 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.