Wiring Diagrams; Factory Settings; Dhw Output; Application Areas / Conversion Table - STIEBEL ELTRON PER 18/21/24 Operation And Installation

INSTALLATION
Specification

15.2 Wiring diagrams

3/PE ~ 380-415 V
1 Heater
2 High limit safety cut-out
3 Safety pressure limiter
Priority control with LR 1-A
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
Automatic water volume
control
ECO
Childproofing
Second line of the display
Orientation light
Backlighting blue / red
www.stiebel-eltron.com
OFF
OFF / 80 l
38 °C / 8 l/min
OFF / 43.0 °C
l/min
OFF
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
16.2
16.3
18.0
19.0
19.4
21.0
21.7
22.6
23.5
24.0
24.4
25.8
Connected load in kW 50 °C DHW output in l/min.
Rated voltage Cold water inlet temperature
380 V 400 V 415 V
16.2
16.3
18.0
19.0
19.4
21.0
21.7
22.6
23.5
24.0
24.4
25.8
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
Conductivity
Resist- Resist-
σ ≤
ance ance
ρ ≥ ρ ≥
≥ Ωcm mS/m μS/cm ≥ Ωcm
900 111 1111 800
1000 100 1000 890
1100 91 909 970
1200 83 833 1070
1300 77 769 1175

15.6 Pressure drop

Taps/valves
Tap pressure drop at a flow rate of 10 l/min
Mono lever mixer tap, approx.
Thermostatic valve, approx.
Hand shower, approx.
5 °C 10 °C 15 °C
7.0 8.3 10.1
7.1 8.3 10.1
7.8 9.2 11.2
8.2 9.7 11.8
8.4 9.9 12.0
9.1 10.7 13.0
9.4 11.1 13.5
9.8 11.5 14.0
10.2 12.0 14.6
10.4 12.2 14.9
10.6 12.4 15.2
11.2 13.2 16.0
5 °C 10 °C 15 °C
5.1 5.8 6.6
5.2 5.8 6.7
5.7 6.4 7.3
6.0 6.8 7.8
6.2 6.9 7.9
6.7 7.5 8.6
6.9 7.8 8.9
7.2 8.1 9.2
7.5 8.4 9.6
7.6 8.6 9.8
7.7 8.7 10.0
8.2 9.2 10.5
25 °C
Conductivity
Conductivity σ ≤
Resist-
σ ≤
ance
ρ ≥
mS/m μS/cm ≥ Ωcm mS/m
125 1250 735 136
112 1124 815 123
103 1031 895 112
93 935 985 102
85 851 1072 93
MPa 0.04 - 0.08
MPa 0.03 - 0.05
MPa 0.03 - 0.15
PER 18/21/24 |
20 °C
12.9
12.9
14.3
15.1
15.4
16.7
17.2
17.9
18.7
19.0
19.4
20.5
20 °C
7.7
7.8
8.6
9.0
9.2
10.0
10.3
10.8
11.2
11.4
11.6
12.3
μS/cm
1361
1227
1117
1015
933
19