STIEBEL ELTRON PER 18/21/24 - Technical Data and Wiring; DHW Output Performance; Wiring Diagrams; Factory Settings

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ENGLISH
INSTALLATION
Specication
15.2 Wiring diagrams
3/PE ~ 380-415 V
85�02�02�0005
1 Heater
2 High limit safety cut-out
3 Safety pressure limiter
Priority control with LR 1-A
85�02�02�0003�
2
1
1 Control cable to the contactor of the 2nd appliance (e.g. elec-
tric storage heater).
2 Control contact opens when switching the instantaneous
water heater on.
15.3 Factory settings
Wellness OFF
Automatic water volume
control
OFF/ 80 l
ECO 38°C / 8 l/min
Childproofing OFF/ 43.0°C
Second line of the display l/min
Orientation light OFF
Backlighting blue/ red 100 %
15.4 DHW output
The DHW output is subject to the mains voltage, the appliance's
connected load and the cold water inlet temperature. The rated
voltage and rated output can be found on the type plate (see chap-
ter "Troubleshooting").
Connected load in kW 38°C DHW output in l/min.
Rated voltage Cold water inlet temperature
380 V 400 V 415 V 5°C 10°C 15°C 20°C
16.2 7.0 8.3 10.1 12.9
16.3 7.1 8.3 10.1 12.9
18.0 7.8 9.2 11.2 14.3
19.0 8.2 9.7 11.8 15.1
19.4 8.4 9.9 12.0 15.4
21.0 9.1 10.7 13.0 16.7
21.7 9.4 11.1 13.5 17.2
22.6 9.8 11.5 14.0 17.9
23.5 10.2 12.0 14.6 18.7
24.0 10.4 12.2 14.9 19.0
24.4 10.6 12.4 15.2 19.4
25.8 11.2 13.2 16.0 20.5
Connected load in kW 50°C DHW output in l/min.
Rated voltage Cold water inlet temperature
380 V 400 V 415 V 5°C 10°C 15°C 20°C
16.2 5.1 5.8 6.6 7.7
16.3 5.2 5.8 6.7 7.8
18.0 5.7 6.4 7.3 8.6
19.0 6.0 6.8 7.8 9.0
19.4 6.2 6.9 7.9 9.2
21.0 6.7 7.5 8.6 10.0
21.7 6.9 7.8 8.9 10.3
22.6 7.2 8.1 9.2 10.8
23.5 7.5 8.4 9.6 11.2
24.0 7.6 8.6 9.8 11.4
24.4 7.7 8.7 10.0 11.6
25.8 8.2 9.2 10.5 12.3
15.5 Application areas/ conversion table
Specific electrical resistance and specific electrical conductivity (see
chapter "Data table").
Standard specifica-
tion at 15°C 20°C 25 °C
Resist-
ance
ρ ≥
Conductivity
σ ≤
Resist-
ance
ρ ≥
Conductivity
σ ≤
Resist-
ance
ρ ≥
Conductivity σ ≤
≥ Ωcm mS/m μS/cm ≥ Ωcm mS/m μS/cm ≥ Ωcm mS/m μS/cm
900 111 1111 800 125 1250 735 136 1361
1000 100 1000 890 112 1124 815 123 1227
1100 91 909 970 103 1031 895 112 1117
1200 83 833 1070 93 935 985 102 1015
1300 77 769 1175 85 851 1072 93 933
15.6 Pressure drop
Taps/valves
Tap pressure drop at a flow rate of 10 l/min
Mono lever mixer tap, approx. MPa 0.04 - 0.08
Thermostatic valve, approx. MPa 0.03 - 0.05
Hand shower, approx. MPa 0.03 - 0.15