20 | DHE AU www.stiebel-eltron.com
INSTALLATION
Specication
16.6 Fault conditions
In case of faults, loads up to 80°C at a pressure of 1.2MPa can
occur temporarily in the installation.
16.7 Data table
DHE 18 AU DHE 27 AU
233988 233989
Electrical data
Rated voltage V 380 400 415 380 400 415
Rated output kW 16.2 18 19.4 24.4 27 29.1
Rated current A 24.7 26 27 37.1 39 40.5
Fuse/MCB rating A 25 25 32 40 40 40
Phases 3/PE 3/PE
Frequency Hz 50/60 50/60 50/- 50/- 50/- 50/-
Max. mains impedance at 50Hz Ω 0.3 0.285 0.274 0.2 0.19 0.183
Max. mains impedance at 60Hz Ω 0.36 0.342
Specific resistance ρ
15
≥ (at ϑcold ≤55°C) Ω cm 900 900 900 900 900 900
Specific conductivity σ
15
≤ (at ϑcold ≤55°C) μS/cm 1111 1111 1111 1111 1111 1111
Connections
Water connection G 1/2 A G 1/2 A
Application limits
Max. permissible pressure MPa 1 1
Max. inlet temperature for reheating °C 55 55
Values
Max. permissible inlet temperature °C 65 65
On l/min > 2.5 > 2.5
Flow rate for pressure drop l/min 5.2 7.7
Pressure drop at flow rate MPa 0.04 0.1
DHW delivery l/min 9.2 13.8
Δϑ on delivery K 28 28
Hydraulic data
Nominal capacity l 0.4 0.4
Versions
Temperature setting °C 20-60 20-60
Safety category 1 1
Insulating block Plastic Plastic
Heating system Bare wire Bare wire
Cover and back panel Plastic Plastic
Colour white white
IP rating IP25 IP25
Dimensions
Height mm 478 478
Width mm 225 225
Depth mm 105 105
Weights
Weight kg 4.5 4.5
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