Wiring Diagram; Dhw Output; Application Areas / Conversion Table; Pressure Drop - STIEBEL ELTRON DEL 18 Plus Operation And Installation Manual

INSTALLATION
Specification
Alternative connection options
DEL Plus
b02 Entry electrical cables I
b03 Entry electrical cables II
b04 Entry electrical cables III
On unfinished walls
On unfinished walls
On finished walls
17.2 Wiring diagram
3/PE - 380-415 V
1 Power PCB with integral safety switch
2 Bare wire heating system
3 High limit safety cut-out
4 Mains terminal
Priority control with LR 1-A
1 Control cable to the contactor of the second appliance ( e.g.
electric storage heater)
2
Control contact drops out when switching the instantaneous
water heater on.
17.3 DHW output
The DHW output is subject to the connected power supply, the
appliance's connected load and the cold water inlet temperature.
The rated voltage and rated output can be found on the type plate.
Connected load in kW
Rated voltage Cold water inlet temperature
380 V 400 V 415 V 5 ° C 10 ° C 15 ° C 20 ° C
DEL 18/21/24 Plus
38 ° C DHW output in l/min
16.2
19
21.7
7.0 8.3
8.2 9.7
9.4 11.1
10.1 12.9
11.8 15.1
13.5 17.2
18 7.8 9.2 11.2 14.3
21 9.1 10.7 13.0 16.7
24 10.4 12.2 14.9 19.0
19.4 8.4 9.9 12.0 15.4
22.6
25.8
9.8 11.5
11.2 13.2
14.0 17.9
16.0 20.5
DEL 27 Plus
24.4 10.6 12.4 15.2 19.4
27 11.7 13.8 16.8 21.4
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
DEL 18/21/24 Plus
16.2
19
21.7
18
21
24
DEL 27 Plus
19.4
22.6
25.8
5.1
6.0
6.9
5.7
6.7
7.6
6.2
7.2
8.2
5.8
6.8
7.8
6.4
7.5
8.6
6.9
8.1
9.2
6.6 7.7
7.8 9.0
8.9 10.3
7.3 8.6
8.6 10.0
9.8 11.4
7.9 9.2
9.2 10.8
10.5 12.3
24.4
27
7.7 8.7
8.6 9.6
10.0 11.6
11.0 12.9
17.4 Application areas / Conversion table
Specific electrical resistance and specific electrical conductivity
Standard specifica-
tion at 15 ° C 20 ° C
25 °C
Resis- Conductivity a 5 Resis- Conductivity a 5 Resis- Conductivity a 5
tivity tivity tivity
f
)
? f
)
? f
)
?
O cm mS/m p5/cm O cm mS/m p5/cm O cm mS/m pS/cm
900 111 1111 800 125 1250 735 136 1361
17.5 Pressure drop
Taps
Tap pressure drop at a flow rate of 10 t/min
Mono lever mixer tap, approx.
Thermostatic valve, approx.
Shower head, approx.
MPa 0.04 - 0.08
MPa 0.03 - 0.05
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.
42 I DEL Plus www.stiebel-eltron.com