Mixed Water Volume / Outlet Volume; Applications / Conversion Table; Pressure Drop; Fault Conditions - STIEBEL ELTRON DHE 21 SLi Gebrauchs- Und Montageanleitung

INSTALLATION
Specification
Priority control with load shedding relay (LR 1-A)
See also chapter "Appliance description / Accessories".
2
1
1 Control cable to the contactor of the second appliance (e.g.
electric storage heater).
2 Control contact opens when switching the instantaneous
water heater on.
16.3 Mixed water volume / outlet volume
The values are relative to a rated voltage of 400 V. The mixed
water volume and outlet volume are subject to the available supply
pressure and the available mains voltage.
Available temperature approx. 38 °C in the shower, for hand
washing, filling the bath etc.
15
14
13
12
11
10
9
8
7
6
6
Outlet temperature approx. 60 °C for the kitchen sink and when
using thermostatic valves.
8
7
6
5
4
6
X Cold water inlet temperature in °C
Y Mixed water volume / outlet volume in l/min
1 18 kW
2 21 kW
3 24 kW
www.stiebel-eltron.com
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10 14

16.4 Applications / Conversion table

Specific electrical resistance and specific electrical
conductivity, see "Data table".
Standard specifica-
tion at 15 °C
Spec. Resi- Spec. Con-
ductivity σ ≤
stance ρ ≥
Ωcm mS/m μS/cm
900 111 1111
1000 100 1000
1100 91 909
1200 83 833
1300 77 769

16.5 Pressure drop

Taps/valves
Pressure drop at taps at flow rate of 10 l/min
Mono-lever mixer tap, approx.
Thermostatic valve, approx.
Hand shower, approx.
Sizing the pipework
When calculating the size of the pipework, a pressure drop for the
3
appliance of 0.1 MPa is recommended.
2

16.6 Fault conditions

1
In case of faults, loads up to a maximum of 80 °C at a pressure of
1.0 MPa can occur temporarily in the installation.
3
2
1
20 °C 25 °C
Spec. Spec. Con- Spec.
ductivity σ ≤
Resistance Resistance
ρ ≥ ρ ≥
Ωcm mS/m μS/cm Ωcm mS/m μS/cm
800 125 1250 735
890 112 1124 815
970 103 1031 895
1070 93 935 985
1175 85 851 1072
MPa
MPa
MPa
DHE SLi |
Spec. Con-
ductivity σ ≤
136 1361
123 1227
112 1117
102 1015
93 933
0.04 - 0.08
0.03 - 0.05
0.03 - 0.15
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