STIEBEL ELTRON 074301, Operation And Installation Manual

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INSTALLATION
Specification
15.2 Wiring diagram
3/PE ~ 400 V
T
Q
L
L L
L L
PE L
32
31
12
11
22
21
D
0000
10
38
21
3
4
2
1
1 Differential pressure switch (MRC control valve)
Stage I for low flow rate
Stage II for high flow rate
2 High limit safety cut-out
3 Tubular heater heating system
4 Mains terminal
Priority control with LR 1-A
85
�0
2�
02
�0
00
3�
2
1
1 Control cable to the contactor of the second appliance
(e.g. electric storage heaters).
2 Control contact drops out when switching the instantaneous
water heater on.
15.3 DHW output
The DHW output is subject to the mains power supply, the appli-
ance connected load and the cold water inlet temperature. The
rated voltage and rated output can be found on the type plate (see
chapter "Installation / Troubleshooting").
Connected load
in kW 38 °C DHW output in l/min.
Rated voltage Cold water inlet temperature
400 V 5 °C 10 °C 15 °C 20 °C
DHF 13 C
6.6 2.9 3.4 4.1 5.2
13.2 5.7 6.7 8.2 10.5
DHF 15 C
7.5 3.2 3.8 4.7 6.0
15 6.5 7.7 9.3 11.9
DHF 18 C
9 3.9 4.6 5.6 7.1
18 7.8 9.2 11.2 14.3
DHF 21 C
10.3 4.5 5.3 6.4 8.2
20.5 8.9 10.5 12.7 16.3
Connected load
in kW 50 °C DHW output in l/min.
Rated voltage Cold water inlet temperature
400 V 5 °C 10 °C 15 °C 20 °C
DHF 13 C
6.6 2.1 2.4 2.7 3.1
13.2 4.2 4.7 5.4 6.3
DHF 15 C
7.5 2.4 2.7 3.1 3.6
15 4.8 5.4 6.1 7.1
DHF 18 C
9 2.9 3.2 3.7 4.3
18 5.7 6.4 7.3 8.6
DHF 21 C
10.3 3.3 3.7 4.2 4.9
20.5 6.5 7.3 8.4 9.8
15.4 Pressure drop
Taps
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
Sizing the pipework
When calculating the size of the pipework, an appliance pressure
drop of 0.1 MPa is recommended.