STIEBEL ELTRON DEL 18 SL i 25A - Technical Data (the Data on the Unit Rating Plate Apply); Area of Application

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5.2 Technical Data (The data on the unit rating plate apply)
DEL 18 SLi 25A DEL 18/21/24 SLi DEL 27 SLi
227498 227499 227500
Electrical details
Rated voltage V 380 400 415 380 400 415 380 400 415
Rated output kW 16,2 18 19,4 16,2/19/21,7 18/21/24 19,4/22,6/25,8 24,4 27 29,1
Rated current A 24,7 26 27 27,6/31,4/33,3 29/33/35 30,1/34,3/36,3 37,1 39 40,5
Fuse A 25 25 32 32/32/35 32/32/35 35/35/40 40 40 40
Phases 3/PE 3/PE 3/PE
Frequency Hz 50/60 50/60 50/- 50/60 50/60 50/- 50/- 50/- 50/-
Specific resistance ρ
15
≥ (at ϑcold ≤25 °C) Ω cm 900 900 900 900 900 900 900 900 900
Specific conductivity σ
15
≤ (at ϑcold ≤25°C) μS/cm 1111 1111 1111 1111 1111 1111 1111 1111 1111
Specific resistance ρ
15
≥ (at ϑcold ≤55 °C) Ω cm 900 900 900 900 900 900 900 900 900
Specific conductivity σ
15
≤ (at ϑcold ≤55°C) μS/cm 1111 1111 1111 1111 1111 1111 1111 1111 1111
Max. mains impedance at 380V / 50Hz Ω 0,300 0,331 0,200
Max. mains impedance at 400V / 50Hz Ω 0,285 0,314 0,190
Max. mains impedance at 415V / 50Hz Ω 0,274 0,302 0,183
Connections
Water connection G 1/2 A G 1/2 A G 1/2 A
Application limits
Max. permissible pressure MPa 1 1 1
Max. inlet temperature for reheating °C 55 55 55
Values
Max. permissible inlet temperature °C 65 65 65
ON l/min > 2,5 > 2,5 > 2,5
Flow rate for pressure drop l/min 5,2 6,9 7,7
Pressure drop at flow rate MPa 0,075 (0,05 without DMB) 0,125 (0,085 without DMB) 0,155 (0,105 without DMB)
Flow rate limit at l/min 12 (7,5) 12 (7,5) 12 (7,5)
DHW delivery l/min 9,2 9,2/10,7/12,3 13,8
Δϑ at DHW delivery K 28 28 28
Hydraulic data
Rated capacity l 0,4 0,4 0,4
Versions
Connected load options - X -
Temperature adjustment °C 30-60 30-60 30-60
Protection class 1 1 1
Insulation block Plastic Plastic Plastic
Heating system heat generator Bare wire Bare wire Bare wire
Cap and back panel Plastic Plastic Plastic
IP-Rating IP25 IP25 IP25
Colour white white white
Dimensions
Height mm 478 478 478
Width mm 225 225 225
Depth mm 105 105 105
Weights
Weight kg 4,3 4,3 4,3
5.3 Area of application
Specific electrical resistance and specific electrical conductivity.
Details as Ranges of use for different references temperatures
Normes details
at 15 °C bei 20 °C bei 25 °C
Resistance
Conductivity
Conductivity
Ωcm
mS/m
μS/cm
≥ 900
≤ 111
≤ 1110
≥ 800
≤ 125
≤ 1250
≥ 735
≤ 136
≤ 1360
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